Fiche technique pour D4C Series de Omron Automation and Safety

®lm€E®C€O EDD QOIlZI-EIDDDDI; °"'“°“ -
Enclosed Switch
D4C
Compact Limit Switch That's Also
Thin and Highly Sealed
■Approved by EN, UL, CSA, and CCC (Chinese standard).
(Ask your OMRON representative for information on approved models.)
■
Sealing characteristics that meet IEC IP67 degree of protection.
■
Triple-sealed construction:
Plunger section sealed via nitrile rubber packing seal and
diaphragm; switch section sealed via nitrile rubber cap;
cable entrance sealed via encapsulating material.
■Cable lengths of 3 and 5 m available on standard models.
Models also available with UL and CSA-certified cables.
■Multiple mounting possible with Switches with Plungers.
■Models with red LED indicators added to series for easy
confirmation of operation.
(Set by default to light for non-operation.)
■VCTF cables with CE marking.
(Applicable only to standard models.)
Be sure to read Safety Precautions on page 13 to 14 and
Safety Precautions for All Limit Switches.
Model Number Structure
Model Number Legend
Standard Models
D4C-@@@
(1)(2)(3)
(1) Rated Current
1: 5 A at 250 VAC, 4 A at 30 VDC
2: 5 A at 125 VAC (with LED indicator)
3: 4 A 30 VDC (with LED indicator)
4: 0.1 A at 125 VAC, 0.1 A at 30 VDC
5: 0.1 A at 125 VAC (with LED indicator)
6: 0.1 A at 30 VDC (with LED indicator)
(2) Cable Specifications
2: VCTF oil-resistant cable (3 m)
3: VCTF oil-resistant cable (5 m)
4: VCTF (3 m)
5: VCTF (5 m)
6: SJT(O) (3 m)
7: SJT(O) (5 m)
(3) Actuator
01: Pin plunger
02: Roller plunger
03: Crossroller plunger
20: Roller lever
24: Roller lever (high-sensitivity model)
31: Sealed pin plunger
32: Sealed roller plunger
33: Sealed crossroller
50: Plastic rod
60: Center roller lever
Pre-wired Models
D4C-@0@@-@@@@@@
(1) (2) (3) (4)
(1) Rated Current
1: 1 A at 125 VAC, 1 A at 30 VDC
(Without operation indicator)
2: 1 A at 125 VAC (with operation indicator)
3: 1 A at 30 VDC (with operation indicator)
(2) Actuator
01: Pin plunger
02: Roller plunger
31: Sealed plunger
32: Sealed roller plunger
24: Roller lever (high-sensitivity model)
(3) Wiring Specifications
DK1EJ: Pre-wired models
(3 conductors: DC specification)
AK1EJ: Pre-wired models
(3 conductors: AC specification)
M1J: Connector models for ASI devices
(2 conductors: NO wiring)
(4) Cable length
03: 0.3 m
Wiring Specifications
Internal switch Connector
COM 3
NC 2
NO 4
Weather-resistant Models
D4C-@@@-P
(1)(2)(3) (4)
(1) Rated Current
1: 5 A at 250 VAC, 4 A at 30 VDC
2: 5 A at 125 VAC (with LED indicator)
3: 4 A at 30 VDC (with LED indicator)
4: 0.1 A at 125 VAC, 0.1 A at 30 VDC
(2) Cable Specifications
2: VCTF oil-resistant cable (3 m)
3: VCTF oil-resistant cable (5 m)
(3) Actuator
20: Roller lever
24: Roller lever (high-sensitivity model)
27: Adjustable roller lever
29: Adjustable rod lever
(4) Structure
P: Weather-resistant
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D4C
Ordering Information
Switches
Switches with No Operation Indicator
Note: 1. Models are available separately with resistance to viscous oils (oil drain holes are also available), but only with Plunger Models. Add “-M” to the model number
(example: D4C-1202 would be D4C-1202-M).
2. Switches with variable roller levers are also available. Ask your nearest OMRON representative for details.
*1. Oil-resistant vinyl cabtire cables; approved by EN and IEC.
*2. Ordinary vinyl cabtire cables;approved by EN and IEC.
*3. Switches with SJT(O) Cables (cables approved by UL and CSA) are approved by UL and CSA.
Actuator
Ratings
Cable
Cable
length
(m)
Standard Microload
5 A at 250 VAC, 4 A at 30 VDC 0.1 A at 125 VAC, 0.1 A at 30 VDC
VCTF oil-resistant
cable *1VCTF cable *2SJT(O) cable *3VCTF oil-resistant
cable *1VCTF cable *2
Model
Pin plunger
3D4C-1201 D4C-1401 D4C-1601 D4C-4201 D4C-4401
5D4C-1301 D4C-1501 D4C-1701 D4C-4301 D4C-4501
Roller plunger
3D4C-1202 D4C-1402 D4C-1602 D4C-4202 D4C-4402
5D4C-1302 D4C-1502 D4C-1702 D4C-4302 D4C-4502
Crossroller
plunger
3D4C-1203 D4C-1403 D4C-1603 D4C-4203 D4C-4403
5D4C-1303 D4C-1503 D4C-1703 D4C-4303 D4C-4503
Roller lever
3D4C-1220 D4C-1420 D4C-1620 D4C-4220 D4C-4420
5D4C-1320 D4C-1520 D4C-1720 D4C-4320 D4C-4520
Roller lever,
high
-sensitivity
3D4C-1224 D4C-1424 D4C-1624 D4C-4224 D4C-4424
5D4C-1324 D4C-1524 D4C-1724 D4C-4324 D4C-4524
Sealed pin
plunger
3D4C-1231 D4C-1431 D4C-1631 D4C-4231 D4C-4431
5D4C-1331 D4C-1531 D4C-1731 D4C-4331 D4C-4531
Sealed roller
plunger
3D4C-1232 D4C-1432 D4C-1632 D4C-4232 D4C-4432
5D4C-1332 D4C-1532 D4C-1732 D4C-4332 D4C-4532
Sealed
crossroller
plunger
3D4C-1233 D4C-1433 D4C-1633 D4C-4233 D4C-4433
5D4C-1333 D4C-1533 D4C-1733 D4C-4333 D4C-4533
Plastic rod
3D4C-1250 D4C-1450 D4C-1650 D4C-4250 D4C-4450
5D4C-1350 D4C-1550 D4C-1750 D4C-4350 D4C-4550
Center roller
lever
3D4C-1260 D4C-1460 D4C-1660 D4C-4260 D4C-4460
5D4C-1360 D4C-1560 D4C-1760 D4C-4360 D4C-4560
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D4C
Standard Switches with Operation Indicator (Red)
Note: Ask your nearest OMRON representative for information on Switching with approved international standards.
*1. Oil-resistant vinyl cabtire cables; approved by EN and IEC.
*2. Ordinary vinyl cabtire cables.; approved by EN and IEC.
Actuator
Ratings
Cable
Cable
length (m)
0.1 A at 125 VAC 0.1 A at 30 VDC
VCTF oil-resistant
cable *1VCTF cable *2VCTF oil-resistant
cable *1VCTF cable *2
Model
Pin plunger
3D4C-2201 D4C-2401 D4C-3201 D4C-3401
5D4C-2301 D4C-2501 D4C-3301 D4C-3501
Roller plunger
3D4C-2202 D4C-2402 D4C-3202 D4C-3402
5D4C-2302 D4C-2502 D4C-3302 D4C-3502
Crossroller
plunger
3D4C-2203 D4C-2403 D4C-3203 D4C-3403
5D4C-2303 D4C-2503 D4C-3303 D4C-3503
Roller lever
3D4C-2220 D4C-2420 D4C-3220 D4C-3420
5D4C-2320 D4C-2520 D4C-3320 D4C-3520
Roller lever,
high
-sensitivity
3D4C-2224 D4C-2424 D4C-3224 D4C-3424
5D4C-2324 D4C-2524 D4C-3324 D4C-3524
Sealed pin
plunger
3D4C-2231 D4C-2431 D4C-3231 D4C-3431
5D4C-2331 D4C-2531 D4C-3331 D4C-3531
Sealed roller
plunger
3D4C-2232 D4C-2432 D4C-3232 D4C-3432
5D4C-2332 D4C-2532 D4C-3332 D4C-3532
Sealed
crossroller
plunger
3D4C-2233 D4C-2433 D4C-3233 D4C-3433
5D4C-2333 D4C-2533 D4C-3333 D4C-3533
Plastic rod
3D4C-2250 D4C-2450 D4C-3250 D4C-3450
5D4C-2350 D4C-2550 D4C-3350 D4C-3550
Center roller
lever
3D4C-2260 D4C-2460 D4C-3260 D4C-3460
5D4C-2360 D4C-2560 D4C-3360 D4C-3560
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D4C
Microload Switches with Operation Indicator
Note: Ask your nearest OMRON representative for information on Switching with approved international standards.
* Oil-resistant vinyl cabtire cables; approved by EN and IEC.
Pre-wired Models (Use VCTF Oil-resistant Cable)
Note: 1. The @ contains the length of the cable.
For example: 30 cm → 4C-1001-AK1EJ03
2. M1J models are also available. Contact your OMRON sales representative for further information.
3. Of the above model numbers, some with special specifications are not registered.
Actuator
Ratings
Cable
Cable
length (m)
0.1 A at 125 VAC 0.1 A at 30 VDC
VCTF oil-resistant cable*VCTF oil-resistant
cable*
Model
Pin plunger 3D4C-5201 D4C-6201
5D4C-5301 D4C-6301
Roller plunger 3D4C-5202 D4C-6202
5D4C-5302 D4C-6302
Crossroller
plunger
3D4C-5203 D4C-6203
5D4C-5303 D4C-6303
Roller lever 3D4C-5220 D4C-6220
5D4C-5320 D4C-6320
Roller lever,
high
-sensitivity
3D4C-5224 D4C-6224
5D4C-5324 D4C-6324
Sealed pin
plunger
3--- D4C-6231
5--- D4C-6331
Sealed roller
plunger
3D4C-5232 D4C-6232
5D4C-5332 D4C-6332
Sealed
crossroller
plunger
3--- D4C-6233
5--- D4C-6333
Plastic rod 3D4C-5250 D4C-6250
5D4C-5350 D4C-6350
Actuator
Ratings 1 A at 125 VAC 1 A at 30 VDC
Operation
indicator Without operation indicator With operation indicator Without operation indicator With operation indicator
Pin plunger D4C-1001-AK1EJ@D4C-2001-AK1EJ@D4C-1001-DK1EJ@D4C-3001-DK1EJ@
Roller plunger D4C-1002-AK1EJ@D4C-2002-AK1EJ@D4C-1002-DK1EJ@D4C-3002-DK1EJ@
Sealed plunger D4C-1031-AK1EJ@D4C-2031-AK1EJ@D4C-1031-DK1EJ@D4C-3031-DK1EJ@
Sealed roller plunger D4C-1032-AK1EJ@D4C-2032-AK1EJ@D4C-1032-DK1EJ@D4C-3032-DK1EJ@
Roller lever (high-
sensitivity model) D4C-1024-AK1EJ@D4C-2024-AK1EJ@D4C-1024-DK1EJ@D4C-3024-DK1EJ@
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D4C
Weather-resistant Models
Note: Silicon rubber is used to increase resistance to the environment. Silicon rubber, however, can generate silicon gas. (This can occur at room temperature, but the
amount of silicon gas generated increases at higher temperatures.) Silicon gas will react as a result of arc energy and form silicon oxide (SiO2). If silicon oxide
accumulates on the contacts, contact interference can occur and can interfere with the device. Before using a Switch, test it under actual application conditions
(including the environment and operating frequency) to confirm that no problems will occur in actual.
Mounting Plates(Order Separately)
The WL model incorporated by equipment can be replaced with the D4C together with the Mounting Plate without changing the position
of the dog or cam.
List of Replaceable Models
Note: The WL01@ is for micro loads.
Example of Replacement
Note: The position of the dog remains unchanged.
Individual Parts
Head/Actuator
Note: 1. The model numbers for heads are of the form D4C-00@@, with the numbers in the squares indicating the type of actuator.
2. Actuators for plunger models, plastic rod models, and center roller lever models cannot be ordered individually. They must be ordered together with the head.
Actuator
Operation
indicator Without operating indication With operating indication
Standard Microload Standard
Ratings
Cable length (m)
5 A at 250 VAC
4 A at 30 VDC
0.1 A at 125 VAC
0.1 A at 30 VDC 5 A at 125 VAC 4 A at 30 VDC
Model
Roller lever
3D4C-1220-P D4C-4220-P D4C-2220-P D4C-3220-P
5D4C-1320-P --- --- ---
Roller lever (high-
sensitivity model)
3D4C-1224-P D4C-4224-P D4C-2224-P D4C-3224-P
5D4C-1324-P D4C-4324-P D4C-2324-P D4C-3324-P
Adjustable roller lever
3D4C-1227-P D4C-4227-P D4C-2227-P D4C-3227-P
5D4C-1327-P D4C-4327-P D4C-2327-P D4C-3327-P
Adjustable rod lever
3D4C-1229-P D4C-4229-P --- D4C-3229-P
5D4C-1329-P --- D4C-2329-P D4C-3329-P
WL model (Actuator)
D4C model (Actuator)
Plate
WLD/WL01D
(Top plunger)
D4C-@@01
(Plunger) D4C-P001
WLD2/WL01D2
(Toproller plunger)
D4C-@@02
(Roller plunger) D4C-P002
WLCA2/WL01CA2
(Roller lever)
D4C-@@20
(Roller lever) D4C-P020
Dog Dog
Mounting
Plate
Actuator Head (with actuator) Actuator
Pin plunger D4C-0001 ---
Roller plunger D4C-0002 ---
Crossroller plunger D4C-0003 ---
Roller lever D4C-0020 WL-1A100
Environment-resistant roller lever D4C-0020-P WL-1A100P1
Roller lever D4C-0024 WL-1A100
Variable roller lever D4C-0027 HL-1HPA320
Variable rod lever D4C-0029 HL-1HPA500
Sealed pin plunger D4C-0031 ---
Sealed roller plunger D4C-0032 ---
Sealed crossroller plunger D4C-0033 ---
Plastic rod D4C-0050 ---
Center roller lever D4C-0060 ---
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OI'DROI'I
D4C
Specifications
Approved Standards
Ratings
Standard Model
Pre-wired Model
Approved Standard Ratings
TÜV(EN60947-5-1),CCC(GB14048.5)
UL/CSA
B300 (D4C-16@@, -17@@)
B150 (D4C-26@@, -27@@)
B300
B150
Characteristics
Note: The above figures are initial values.
*1. The values are calculated at an operating temperature of +5°C to +35°C,
and an operating humidity of 40% to 70%RH. Contact your OMRON sales
representative for more detailed information on other operating
environments.
*2. Pre-wired Models: 1,000,000 operations min. (DC specifications, switching
current: 0.1 A)
*3. Outdoor specifications: 500,000 operations min.
*4. Excluding Plastic Rods.
*5. Pre-wired models: 250 V
*6. Pre-wired models: class III
Agency Standard File No.
TÜV Product
Service EN60947-5-1 *1, 3
UL UL508 E76675 *2
CSA CSA C22.2 No.14 LR45746 *2
CCC(CQC) GB14048.5 2003010305077626 *3
*1. Models with VCTF oil-resistant cables and pre-wired models only.
(Applicable only to standard models listed on pages 2 to 4.)
*2. SJT(O)-cable models only.
(Applicable only to standard models listed on pages 2 to 3.)
*3. Ask your OMRON representative for information on approved models.
Rated voltage
Non-inductive load (A) Inductive load (A)
Resistive load Lamp load Inductive load Motor load
NC NO NC NO NC NO NC NO
125 VAC
250 VAC
5 (0.1)
5
1.5
1
0.7
0.5
3
2
2.5
1.5
1.3
0.8
8 VDC 5 (0.1) 2 5 4 3
14 VDC 5 (0.1) 2 4 4 3
30 VDC 4 (0.1) 2 3 3 3
125 VDC 0.4 0.05 0.4 0.05
250 VDC 0.2 0.03 0.2 0.03
Inrush
current
NC 20 A max.
NO 10 A max.
Note: 1. The values given on the left are steady-state
currents.
2. Inductive loads have a power factor of 0.4 min.
(AC) and a time constant of 7 ms max. (DC).
3. Lamp loads have an inrush current of 10 times
the steady-state current.
4. Motor loads have an inrush current of 6 times
the steady-state current.
5. The values "0.1" given in parentheses are for
micro load models.
Rated voltage
Non-inductive load(A) Inductive load(A)
Resistive load Lamp load Inductive load Motor load
NC NO NC NO NC NO NC NO
125 VAC1110.71111
30 VDC 11111111
Model Applicable category and
ratings I the
D4C-1@@@ AC-15 2 A/250 V
DC-12 2 A/30 V
5 A
4 A
D4C-2@@@ AC-15 2 A/125 V 5 A
D4C-3@@@ DC-12 2 A/30 V 4 A
D4C-4@@@ AC-14 0.1 A/125 V
DC-12 0.1 A/30 V
0.5 A
0.5 A
D4C-5@@@ AC-14 0.1 A/125 V 0.5 A
D4C-6@@@ DC-12 0.1 A/30 V 0.5 A
Rated voltage Carry current Current(A)
Volt-amperes(VA)
Make Break Make Break
120 VAC
240 VAC 5 A 30
15
3
1.5
3,600
3,600
360
360
Rated voltage Carry current Current(A)
Volt-amperes(VA)
Make Break Make Break
120 VAC 5 A 30 3 3,600 360
Degree of protection IP67
Durability
*1
Mechanical *3 10,000,000 operations min.
Electrical *2
200,000 operations min. (5 A at 125 VAC, resistive load)
Operating speed 0.1 mm/s to 0.5 m/s (in case of plunger)
1 mm/s to 1 m/s (in case of roller lever)
Operating
frequency
Mechanical 120 operations/min
Electrical 30 operations/min
Rated frequency 50/60 Hz
Insulation resistance 100 MΩ min. (at 500 VDC)
Contact resistance (initial)
250 m
Ω
max. (initial value with 2-m VCTF cable)
300 m
Ω
max. (initial value with 3-m VCTF cable)
400 m
Ω
max. (initial value with 5-m VCTF cable)
Dielectric
strength
Between terminals of
the same polarity
1,000 VAC,50/60 Hz for 1 min
Between current-
carrying metal
part and ground
1,500 VAC,50/60 Hz for 1 min
Uimp: 2.5 kV(EN60947-5-1)
Between each terminal
and non-current-carry-
ing metal part,
1,500 VAC,50/60 Hz for 1 min
Uimp: 2.5 kV(EN60947-5-1)
Rated insulation voltage (Ui)
300 V (EN60947-5-1) *5
Pollution degree (operating environment)
3 (EN60947-5-1)
Short-circuit protective device (SCPD)
10 A fuse type gI or gG (IEC60269)
Conditional short-circuit current
100 A (EN60947-5-1)
Conventional enclosed
thermal current (I the) 5 A, 4 A, 0.5 A (EN60947-5-1)
Protection against electric shock
Class I (with grounding wire) *6
Vibration re-
sistance
Malfunction 10 to 55 Hz, 1.5-mm double amplitude *4
Shock re-
sistance
Destruction 1,000 m/s2 min.
Malfunction 500 m/s2 min. *4
Ambient operating temperature
-10°C to +70°C (with no icing)
Ambient operating humidity
35% to 95%RH
Weight (D4C-1202) With 3-m VCTF cable: 360 g
With 5-m VCTF cable: 540 g
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omRon
D4C
Engineering Data
Leakage Current for LED-indicator Models
The leakage currents and resistances of LED-indicator models are given in the following table.
Structure and Nomenclature
Structure
Standard Models
Weather-resistant Models
Model Voltage Leakage current Resistance
D4C-2@@@ 125 VAC 1.7 mA 68 kΩ
D4C-3@@@ 30 VDC 1.7 mA 15 kΩ
D4C-5@@@ 125 VAC 1.7 mA 68 kΩ
D4C-6@@@ 30 VDC 1.7 mA 15 kΩ
500
300
100
30
10
110234567
125 VAC
250 VAC
3
5
50
Durability (x 104 operations)
Switching current (mA)
Operating temperature: 20±2°C
Operating humidity: 65±5°C
Operating frequency: 30 operations/min
(cosΦ= 1, L/R = 0)
Operating temperature: 5°C to 35°C
Operating humidity: 40% to 70%
Operating frequency: 30 operations/min
(cosΦ=1, L/R = 0)
1,000
300
500
700
100
30
10
200 40 60 80 100 120
125 VAC
30 VDC
3
5
50
Durability (x 104 operations)
Switching current (mA)
Electrical Durability
D4C-1@@@, -2@@@, -3@@@ D4C-4@@@, -5@@@, -6@@@
O-ring
(NBR)
Built-in switch
Roller
Lever
Diaphragm (NBR)
O-ring
(NBR)
Protective cap
(NBR)
Ground terminal
Molded resin
Cable
Roller Lever Models Without Indicator
Shaft Section Seal
By fitting an O-ring to the rotary shaft and with
an appropriate interference of the screws,
high-sealing properties are maintained. The O-ring
is made of silicone rubber and is resistant to temperature
changes and adverse weather conditions.
Roller
The roller is made of self-lubricating sintered
stainless steel and boasts high resistance to
wear.
Head-mounting
Screw
Diaphragm
The diaphragm is made of silicone rubber
and is resistant to temperature changes
and adverse weather conditions.
Cable
Vinyl cabtire cable and is resistant
to adverse weather conditions.
Lever
The lever forged of anti-corrosive aluminium
alloy features high corrosion resistances
and outstanding ruggedness.
Built-in Switch
Both standard load and microload models available.
Rotary Shaft
The shaft is made of stainless steel
decreasing the likelihood of rusting.
Roller Lever Setscrew
This screw is made of stainless steel and has high
corrosion resistance.
Roller Lever Models Without Indicator
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OITIROD
D4C
Contact Form
Standard Models/Weather-resistant Models
Without Operation Indicator
With Operation Indicator
(Lit when Not Actuated)
<24 VDC LED>
<100 VAC LED>
Connector Models for ASI Devices (-M1J)
Without Operation Indicator
With Operation Indicator
(Lit when Not Actuated)
Pre-wired Models (-AK1EJ@, -DK1EJ@)
Without Operation Indicator
With Operation Indicator
(Lit when Not Actuated)
<24 VDC LED>
<100 VAC LED>
*1. Yellow/green: VCTF oil-resistant cable
Green: VCTF cable
*2. SJT(O) cable approved by UL and CSA.
*3. E (ground) is not grounded.
*4. The position of the positioning piece is not fixed. Using an L-shaped
connector may result in failure. Use only a straight connector.
Note: “Lit when not Actuated” means that when the actuator is in the free
position, the indicator is lit, and when the actuator is turned or pushed and
the contact comes into contact with the NO side, the indicator turns OFF.
E
NC(red)
NO(white)
(Yellow/green stripes) *1
(black)COM
(blue) *2
(green) *2
E
NC(red)
(black)COM
NO(white)
(blue) *2 (Yellow/green) *1
(green) *2
15kΩ
E
NC(red)
(black)COM
NO(white)
(blue) *2 (Yellow/green) *1
(green) *2
68kΩ
Pin No.3 COM
NO Pin No.4
R
Pin No.3 COM
NO Pin No.4
NO
COM
Positioning piece*4
For DC
E *3
NO Pin No.4
NC Pin No.2
Pin No.3 COM
E *3
NO Pin No.4
NC Pin No.2
Pin No.3 COM
15kΩ
E *3
NO Pin No.4
NC Pin No.2
Pin No.3 COM
68kΩ
NC
NO
COM
Positioning piece*4
NC
NO
COM
Positioning piece*
4
For AC For DC
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D4C
Dimensions and Operating Characteristics
Switches
Standard Models
Note: Unless otherwise specified, a tolerance of ±0.4 mm applies to all dimensions.
Model
Operating
characteristics
D4C-@@01 D4C-@@02 D4C-@@03 D4C-@@20
D4C-@@20-P
D4C-@@24
D4C-@@24-P
Operating force OF max.
Release force RF min.
Pretravel PT max.
Overtravel OT min.
Movement Differential
MD max.
11.77 N
4.41 N
1.8 mm
3 mm
0.2 mm
11.77 N
4.41 N
1.8 mm
3 mm
0.2 mm
11.77 N
4.41 N
1.8 mm
3 mm
0.2 mm
5.69 N
1.47 N
25°
40°
3°
5.69 N
1.47 N
10°±3°
50°
3°
Operating Position
OP 15.7±1 mm 28.5±1 mm 28.5±1 mm --- ---
Models without LED indicators are shown in the illustrations and dimensions diagrams. Refer to page 11 for Models with LED Indicators.
The boxes in the model numbers are replaced with the rating and cable type. Refer to page 1 for the Model Number Structure.
OP
PT 16
2.8
2
1.4 1.5
7.5
4.5
8
23
2
34
10 dia. stainless
steel plunger
40 max.
54.2 max. 49 max.
VCTF cable,
0.75 mm2,
4 conductor
Finishing O.D.: 7.6
Correct
setting
position
Two, 5.1 +0.2 dia.
holes
Spot facing
10.2 dia. Depth: 6
0
25±0.1
Pin Plunger
D4C-@@01
65 max.
* S-FLEX VCTF Cables are used for weatherresistant models.
16
38R
7
2
11.4
1.4 1.5
7.5
8
23
2
34
VCTF cable,
0.75 mm2,
4 conductor
Finishing
O.D.: 7.6
Two, 5.1 +0.2 dia.
holes
Spot facing
10.2 dia. Depth: 6
0
*
17.5 dia. x 7 stainless
sintered roller
102.7 max.
40 max.
50 max.
25±0.1
44±0.8
30.2±0.8
31.5±0.8
M5 (length: 12)
Allen-head
bolt
Roller Lever
D4C-@@20
D4C-@@20-P
OP
PT 16
2.8
2
1.4 1.5
7.5
7
8
23
2
34
12 dia. x 4.4 stainless steel roller
40 max.
VCTF cable,
0.75 mm2,
4 conductor
Finishing O.D.: 7.6
Correct
setting
position
Two, 5.1 +0.2 dia.
holes
Spot facing
10.2 dia. Depth: 6
0
25±0.1
67 max.
51.5 max.
Roller Plunger
D4C-@@02
OP
PT 16
2.8
2
1.4 1.5
7.5
7
8
23
2
34
12 dia. x 4.4 stainless steel roller
40 max.
VCTF cable,
0.75 mm2,
4 conductor
Finishing O.D.: 7.6
Correct
setting
position
Two, 5 .1 +0.2 dia.
holes
Spot facing
10.2 dia. Depth: 6
0
25±0.1
67 max.
51.5 max.
Crossroller Plunger
D4C-@@03
16
38R
7
2
11.4
1.4 1.5
7.5
8
23
2
34
65 max.
* S-FLEX VCTF Cables are used for weatherresistant models.
VCTF cable,
0.75 mm2,
4 conductor
Finishing
O.D.: 7.6
Two, 5.1 +0.2 dia.
holes
Spot facing
10.2 dia. Depth: 6
0
*
17.5 dia. x 7 stainless
sintered roller
102.7 max.
40 max.
50 max.
25±0.1
44±0.8
30.2±0.8
31.5±0.8
M5 (length: 12)
Allen-head
bolt
Roller Lever (High-Sensitivity Model)
D4C-@@24
D4C-@@24-P
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D4C
Note: Unless otherwise specified, a tolerance of ±0.4 mm applies to all dimensions.
* The TT is a reference value.
Operating
characteristics
Model D4C-@@31 D4C-@@32 D4C-@@33
Operating force OF max.
Release force RF min.
Pretravel PT max.
Overtravel OT min.
Movement Differential
MD max.
17.65 N
4.41 N
1.8 mm
3 mm
0.2 mm
17.65 N
4.41 N
1.8 mm
3 mm
0.2 mm
17.65 N
4.41 N
1.8 mm
3 mm
0.2 mm
Operating Position
OP
Total travel TT *
24.9±1 mm
(5) mm
34.3±1 mm
(5) mm
34.3±1 mm
(5) mm
OP
PT 16
2
1.4 1.5
7.5
4.0
8
23
2
34
Two, 5.1 +0.2 dia.
holes
Spot facing
10.2 dia. Depth: 6
VCTF cable,
0.75 mm2,
4 conductor
Finishing O.D.: 7.6
40 max.
49 max.
10 dia. stainless
steel plunger
25±0.1
Rubber cap
0
S
ealed Plunger
D4C-@@31
OP
PT 16
2
1.4 1.5
7.5
4.0
8
23
2
34
Two, 5.1 +0.2 dia.
holes
Spot facing
10.2 dia. Depth: 6
0
Rubber cap
12 dia. x 4.4 stainless
steel roller
40 max.
25±0.1
49 max.
VCTF cable,
0.75 mm2,
4 conductor
Finishing O.D.: 7.6
S
ealed Roller Plunger
D4C-@@32
OP
PT 16
2
1.4 1.5
7.5
4.0
8
23
2
34
Two, 5.1 +0.2 dia.
holes
Spot facing
10.2 dia. Depth: 6
0
Rubber cap
12 dia. x 4.4 stainless
steel roller
40 max.
25±0.1
49 max.
VCTF cable,
0.75 mm2,
4 conductor
Finishing O.D.: 7.6
Sealed Crossroller Plunger
D4C-@@33
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D4C
Note: Unless otherwise specified, a tolerance of ±0.4 mm applies to all dimensions.
Models with LED Indicator
The dimensions of the LED
indicator for models equipped with
one are shown below.
Pre-wired Models
Note: Unless otherwise specified, a tolerance of ±0.4 mm applies to all dimensions.
Note: Specifications are the same for -M1J Switches.
104±2.5
38 3.2 dia.
6.6 dia.
*2
42
16
2
1.4 1.5
7.5
4.5
8
23
2
34
*1
VCTF cable,
0.75 mm2,
4 conductor
Finishing O.D.: 7.6
Two, 5.1 +0.2 dia.
holes
Spot facing
10.2 dia. Depth: 6
0
Rubber cap
Nylon rod
40 max.
25±0.1
49 max.
*1 Operation is possible in any direction except in parallel to the axis.
*2 The ideal range for operation is between the tip of the rod and 1/3 of
the length of the actuator.
Plastic rod
D4C-@@50
56.9
38R
18.9
16
2
1.5
7.5
11.4
7
8
23
2
34
1.4
VCTF cable,
0.75 mm2,
4 conductor
Finishing O.D.: 7.6
Two, 5.1 +0.2 dia.
holes
Spot facing
10.2 dia. Depth: 6
0
40 max.
25±0.1
102.7 max.
17.5 dia. x 7 stainless
sintered roller
Center Roller Lever Plunger
D4C-@@60
Operating
characteristics
Model D4C-@@50 D4C-@@60
Operating force OF max.
Release force RF min.
Pretravel PT max.
Overtravel OT min.
Movement Differential
MD max.
1.47 N
---
15°
---
---
6.67 N
1.47 N
10°±3°
50°
3°
Operating Position
OP
Total travel TT
---
---
---
---
（4）
LED
OP
PT 16
2.8
2
1.4
1.5
7.5
4.5
8
23
XS2H-D421
2
34
Two, 5.1 +0.2 dia.
holes
Spot facing
10.2 dia. Depth: 6
0
40 max.
54.2 max. 49 max.
25±0.1
10 dia. stainless
steel plunger
Correct setting
position
6 dia.
Pin Plunger
D4C-@001-@K1EJ@
D4C-@001-M1J@
OP
PT 16
2.8
2
7.5
7
8
23
2
34 1.4
1.5
XS2H-D421
Two, 5.1 +0.2 dia.
holes
Spot facing
10.2 dia. Depth: 6
0
40 max.
25±0.1
12 dia. x 4.4 stainless
steel roller
67 max.
51.5 max.
Correct setting
position
6 dia.
Roller Plunger
D4C-@002-@K1EJ@
D4C-@002-M1J@
Model
Operating
characteristics
D4C-@001
-@K1EJ@
D4C-@002
-@K1EJ@
Operating force OF max.
Release force RF min.
Pretravel PT max.
Overtravel OT min.
Movement Differential
MD max.
11.77 N
4.41 N
1.8 mm
3 mm
0.2 mm
11.77 N
4.41 N
1.8 mm
3 mm
0.2 mm
Operating Position
OP 15.7±1 mm 28.5±1 mm
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D4C
Note: Unless otherwise specified, a tolerance of ±0.4 mm applies to all dimensions.
Note: Specifications are the same for -M1J Switches
Note: Unless otherwise specified, a tolerance of ±0.4 mm applies to all dimensions.
Model
Operating
characteristics
D4C-@031
-@K1EJ@
D4C-@032
-@K1EJ@
Operating force OF max.
Release force RF min.
Pretravel PT max.
Overtravel OT min.
Movement Differential
MD max.
17.65 N
4.41 N
1.8 mm
3 mm
0.2 mm
17.65 N
4.41 N
1.8 mm
3 mm
0.2 mm
Operating Position
OP 24.9±1 mm 34.3±1 mm
OP
PT 16
2
1.4
1.5
7.5
4.5
8
23
XS2H-D421
2
34
Two, 5.1 +0.2 dia.
holes
Spot facing
10.2 dia. Depth: 6
0
10 dia. stainless
steel plunger
40 max.
49 max.
25±0.1
6 dia.
Rubber cap
S
ealed Pin Plunger
D4C-@031-@K1EJ@
D4C-@031-M1J@
OP
PT 16
2
7.5
4.5
8
23
2
34 1.4
1.5
XS2H-D421
Two, 5.1 +0.2 dia.
holes
Spot facing
10.2 dia. Depth: 6
0
40 max.
25±0.1
12 dia. x 4.4 stainless
steel roller
6 dia.
49 max.
Rubber cap
S
ealed Roller Plunger
D4C-@032-@K1EJ@
D4C-@032-M1J@
16
38R
7
2
11.4
7.5
8
23
1.4
1.5
XS2H-D421
2
34
Two, 5.1 +0.2 dia.
holes
Spot facing
10.2 dia. Depth: 6
0
40 max.
25±0.1
102.7 max.
17.5 dia. x 7 stainless
sintered roller 50 max.
44±0.8
30.2±0.8
31.5±0.8
65 max.
6 dia.
M5 (length: 12)
Allen-head bolt
Roller Lever (High-sensitivity Model)
D4C-@024-@K1EJ@
D4C-@024-M1J@
Note: Specifications are the same for -M1J Switches
Operating
characteristics Model D4C-@024-@K1EJ@
Operating force OF max.
Release force RF min.
Pretravel PT max.
Overtravel OT min.
Movement Differential
MD max.
5.69 N
1.47 N
10°±3°
50°
3°
Operating Position
OP ---
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D4C
Weather-resistant Models
Note: Unless otherwise specified, a tolerance of ±0.4 mm applies to all dimensions.
* Operation characteristics for the D4C-@@27-P and D4C- @@29-P are for a lever length of 38 mm.
Safety Precautions
For details, be sure to read Safety Precautions for All Limit Switches.
Operating Environment
•Seal material may deteriorate if a Switch is used outdoor or where
subject to special cutting oils, solvents, or chemicals. Always
appraise performance under actual application conditions and set
suitable maintenance and replacement periods.
•Install Switches where they will not be directly subject to cutting
chips, dust, or dirt. The Actuator and Switch must also be protected
from the accumulation of cutting chips or sludge.
•Constantly subjecting a Switch to vibration or shock can result in
wear, which can lead to contact interference with contacts,
operation failure, reduced durability, and other problems.
Excessive vibration or shock can lead to false contact operation or
damage. Install Switches in locations not subject to shock and
vibration and in orientations that will not produce resonance.
•The Switches have physical contacts. Using them in environments
containing silicon gas will result in the formation of silicon oxide
(SiO2) due to arc energy. If silicon oxide accumulates on the
contacts, contact interference can occur. If silicon oil, silicon filling
agents, silicon cables, or other silicon products are present near the
Switch, suppress arcing with contact protective circuits (surge
killers) or remove the source of silicon gas.
Handling
The bottom of the Switch at the cable outlet is resin-molded. Secure
the cable at a point 5 cm from the Switch bottom to prevent exertion
of excess force on the cable.
When bending the cable, provide a bending radius of 45 mm min. so
as not to damage the cable insulation or sheath. Excessive bending
may cause fire or leakage current.
Connections
•Be sure to connect a fuse with a breaking current 1.5 to 2 times
larger than the rated current to the Limit Switch in series in order to
protect the Limit Switch from damage due to short-circuiting.
•When using the Limit Switch for the EN ratings, use the gI or gG 10-
A fuse.
Operating
characteristics
Model D4C-@@27-P D4C-@@29-P *
Operating force OF max.
Release force RF min.
Pretravel PT max.
Overtravel OT min.
Movement Differential
MD max.
5.69 N
1.47 N
25°
40°
3°
5.69 N
1.47 N
25°
40°
3°
Precautions for Correct Use
16
7
2
11.4
1.4
2
1.5
7.5
8
23
2
34
VCTF cable, 0.75 mm2,
4 conductor Finishing O.D.: 7.6
Two, 5.1 +0.2 dia. holes
Spot facing 10.2 dia. Depth: 6
0
40 max.
25±0.1
52.3±0.8
31.5±0.8
17.5 dia. x 7 stainless
steel roller
30R to 75R (variable)
M5 (length: 16)
Allen-head bolt
M5 (length: 12)
Allen-head bolt
57.7 max.
65 max.
Adjustable Roller Lever
D4C-@@27-P
44
16
31.5
5.4
7
2
11.4
1.4 1.5
7.5
8
23
2
34
VCTF cable, 0.75 mm2,
4 conductor Finishing O.D.: 7.6
40 max.
25±0.1
3 dia. x 160 stainless
steel lever
M5 (length: 16)
Allen-head bolt
M5 (length: 12)
Allen-head bolt
55 max.
65 max.
Two, 5.1 +0.2 dia. holes
Spot facing 10.2 dia.
Depth: 6
0
Adjustable Rod Lever
D4C-@@29-P
Not Suitable Suitable
Secure
here
5 cm
Bending radius
(R45 mm min.)
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D4C
Operation
•Operation method, shapes of cam and dog, operating frequency,
and overtravel have a significant effect on the service life and
precision of a Limit Switch. For this reason, the dog angle must be
30° max., the surface roughness of the dog must be 6.3 S min. and
hardness must be Hv 400 to 500.
•To allow the plunger-type actuator to travel properly, adjust the dog
and cam to the proper setting positions. The proper position is
where the plunger groove fits the bushing top.
•To allow the roller lever-type actuator to travel properly, adjust the
dog and cam so that the arrow head is positioned between the two
convex markers as shown below.
Mounting
•A maximum of 6 Switches may be group-mounted. In this case, pay
attention to the mounting direction so that the convex part of the
group-mounting guide on one Switch fits into the concave part of
the guide on the other Switch as shown in the figure below. For
group mounting, the mounting panel must have a thickness (t) of 6
mm min.
•If the mounting panel is warped or has protruding parts, a
malfunction may result. Make sure that the mounting panel is not
warped and has even surfaces.
•Use a Switch with a rubber cap when using the plunger type in an
environment where malfunction is possible due to environmental
conditions such as dust or cutting chips which may not allow
resetting.
•Do not expose the Switch to water exceeding 70°C or use it in
steam.
•When the D4C is used in a circuit of a device to be exported to
Europe, classified as Overvoltage Class III as specified in IEC664,
provide a contact protection circuit.
•Tighten each screw to a torque according to the following table.
Micro-load Models (D4C-4, -5, -6)
Micro-load models
can be used for
switching in the range
shown below.
2.8 mm
Dog
Bushing top
Groove 2.8 mm
Arrow head
Not correct
Correct
Convex
markers
Not correc
t
Correct
No. Type
Appropriate tightening torque*
1 M5 Allen-head bolt 4.90 to 5.88 N·m
2 M3.5 head mounting screw 0.78 to 0.88 N·m
3 M5 Allen-head bolt 4.90 to 5.88 N·m
Group-mounting guide
(Front: convex
Rear: concave)
Mounting panel
16 mm
Group-mounting guide
(Front: convex Rear: concave) t
Group Mounting
Two, 5.2-dia. or M5 screw holes
25±0.1
Mounting Holes
* By removing the two screws from
the head, the head direction can
be rotated 180°. After changing the
head direction, re-tighten to the
torque specified above. Be careful
not to allow any foreign substance
to enter the Switch.
30
24
12
5
01 10 100 1,0000.1
1 mA
26 mA0.16 mA
800 mW5 mW
100 mA 160 mA
Switching
range for
micro-load
models
Switching
range for
standard-
load
models
Switching
not possible
in this range
Current (mA)
Voltage (V)
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Precautions for All Limit Switches
(Not including Safety Switches)
Note: Refer to the Precautions section for each Switch for specific precautions applicable to each Switch.
•If the Switch is to be used as a switch in an emergency stop circuit
or in a safety circuit for preventing accidents resulting in injuries or
deaths, use a Switch with a direct opening mechanism, use the NC
contacts with a forced release mechanism, and set the Switch so
that it will operate in direct opening mode.
For safety, install the Switch using one-way rotational screws or
other similar means to prevent it from easily being removed. Protect
the Switch with an appropriate cover and post a warning sign near
the Switch in order to ensure the safety.
•Do not supply electric power when wiring. Otherwise electric shock
may result.
•Keep the electrical load below the rated value.
•Be sure to evaluate the Switch under actual working conditions
after installation.
•Do not touch the charged switch terminals while the Switch has
carry current, otherwise electric shock may result.
•If the Switch has a ground terminal, be sure to connect the ground
terminal to a ground wire.
•Do not disassemble the Switch while electric power is being supply.
Otherwise electric shock may result.
•The durability of the Switch greatly varies with switching conditions.
Before using the Switch, be sure to test the Switch under actual
conditions. Make sure that the number of switching operations is
within the permissible range.
If a deteriorated Switch is used continuously, insulation failures,
contact weld, contact failures, switch damage, or switch burnout
may result.
•Maintain an appropriate insulation distance between wires
connected to the Switch.
•Some types of load have a great difference between normal current
and inrush current. Make sure that the inrush current is within the
permissible value. The greater the inrush current in the closed
circuit is, the greater the contact abrasion or shift will be.
Consequently, contact weld, contact separation failures, or
insulation failures may result. Furthermore, the Switch may become
broken or damaged.
Wiring
Pay the utmost attention so that each terminal is wired correctly.
If the terminal is wired incorrectly, the Switch will not function.
Furthermore, not only will the Switch have a bad influence on the
external circuit, the Switch itself may become damaged or burnt.
Mounting
•Do not modify the actuator, otherwise the operating characteristics
and performance of the actuator will change.
•Do not enlarge the mounting holes of the Switch or modify the
Switch. Doing so may result in insulation failures, housing damage,
or physical injuries.
•Be sure to evaluate the Switch under actual working conditions
after installation.
•Do not apply oil, grease, or other lubricants to the moving parts of
the actuator, otherwise the actuator may not operate correctly.
Furthermore, intrusion of oil, grease, or other lubricants inside the
Switch may reduce sliding characteristic or cause failures in the
Switch.
•Mount the Switch and secure it with the specified screws tightened
to the specified torque along with flat washers and springs. The
actuator of a Pushbutton Limit Switch mounted to a panel with
excessive tightening torque may not operate correctly.
•Be sure to wire the Switch so that the conduit opening is free of
metal powder or any other impurities.
•If glue or bonding agent is applied, make sure that it does not
adhere to the movable parts or intrude inside the Switch, otherwise
the Switch may not work correctly or cause contact failure. Some
types of glue or bonding agent may generate a gas that may have
a bad influence on the Switch. Pay the utmost attention when
selecting the glue or locking agent.
•Do not drop or disassemble the Switch, otherwise the Switch will
not be capable of full performance. Furthermore, the Switch may
become broken or burnt.
•Some models allow changes in head directions. When changing
the head of such a model, make sure that the head is free of any
foreign substance. Tighten each screw of the head to the rated
torque.
•Be sure to take measures so that no foreign material, oil, or water
will penetrate into the Switch through the conduit opening. Be sure
to attach a connector suited to the cable thickness and tighten the
connector securely to the rated torque.
•Do not impose shock or vibration on the actuator while it is fully
pressed. Otherwise, the actuator will partially abrade and an
actuation failure may result.
Wiring
•If the wiring method is incorrect, the wires may get caught on
objects or the lead wires may be pulled excessively. Make sure that
the lead wires are sufficiently long and secure them along the wiring
path.
•Pay the utmost attention so that each terminal is wired correctly. If
a terminal is wired incorrectly, the Limit Switch will not function
properly. Furthermore, not only will the Limit Switch have an
adverse influence on external circuits, the Limit Switch itself may
become damaged or burnt.
For details, refer to Precautions for Correct Use in the
Technical Guide for Limit Switches.
Precautions for Safe Use
i (Inrush current)
I
(A)
io (Constant current)
t
Precautions for Correct Use
CorrectIncorrect
Terminal boxTerminal box
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OF/ /4 RF FF RF amorpmp :1 MD or 70% lo 100% of the OT OITIROD
Technical Guide for Limit Switches
Precautions for Correct Use
Switch Operation
•The Switch in actual operation may cause accidents that cannot be
foreseen from the design stage. Therefore, the Switch must be
practically tested before actual use.
•When testing the Switch, be sure to apply the actual load condition
together with the actual operating environment.
•All the performance ratings in this catalog are provided under the
following conditions unless otherwise specified.
Inductive load:
A minimum power factor of 0.4 (AC) or a maximum time constant
of 7 ms (DC)
Lamp load:
An inrush current 10 times higher than the normal current
Motor load:
An inrush current 6 times higher than the normal current
(1) Ambient temperature: +5°C to +35°C
(2) Ambient humidity: 40% to 70%RH
Note: An inductive load causes a problem especially in DC circuitry. Therefore,
it is essential to know the time constants (L/R) of the load.
Mechanical Characteristics
Operating Force, Stroke, and Contact Characteristics
•The following graph indicates the relationship between operating
force and stroke or stroke and contact force. In order to operate the
Limit Switch with high reliability, it is necessary to use the Limit
Switch within an appropriate contact force range. If the Limit Switch
is used in a normally closed condition, the dog must be installed so
that the actuator will return to the FP when the actuator is actuated
by the dog. If the Limit Switch is used in a normally open condition,
the actuator must be pressed to 70% to 100% of the OT (i.e., 60%
to 80% of the TT) and any slight fluctuation must be absorbed by
the actuator.
•If the full stroke is set close to the OP or RP, contact instability may
result. If the full stroke is set to the TTP, the actuator or switch may
become damaged due to the inertia of the dog. In that case, adjust
the stroke with the mounting panel or the dog.
Refer to page 11, Dog Design, page 12, Stroke Settings vs. Dog
Movement Distance, and page 12, Dog Surface for details.
•The following graph shows an example of changes in contact force
according to the stroke. The contact force near the OP or RP is
unstable, and the Limit Switch cannot maintain high reliability.
Furthermore, the Limit Switch cannot withstand strong vibration or
shock.
•If the Limit Switch is used so that the actuator is constantly pressed,
it will fail quickly and reset faults may occur. Inspect the Limit Switch
periodically and replace it as required.
Mechanical Conditions for Switch Selection
•The actuator must be selected according to the operating method.
(Refer to page 9.)
•Check the operating speed and switching frequency.
1. If the operating speed is extremely low, the switching of the
movable contact will become unstable, thus resulting in incorrect
contact or contact weld.
2. If the operating speed is extremely high, the Switch may break due
to shock. If the switching frequency is high, the switching of the
contacts cannot catch up with the switching frequency. Make
sure that the switching frequency is within the rated switching
frequency.
•Do not impose excessive force on the actuator, otherwise the
actuator may become damaged or not operate correctly.
•Make sure that the stroke is set within the suitable range specified
for the model, or otherwise the Switch may break.
Electrical Characteristics
Electrical Characteristics for Switch Selection
•The switching load capacity of the Switch greatly varies between
AC and DC. Always be sure to apply the rated load. The control
capacity will drastically drop if it is a DC load. This is because a DC
load has no current zero-cross point, unlike an AC load. Therefore,
if an arc is generated, it may continue comparatively for a long time.
Furthermore, the current direction is always the same, which
results in a contact relocation phenomena whereby the contacts
easily stick to each other and do not separate when the surfaces of
the contacts are uneven.
•If the load is inductive, counter-electromotive voltage will be
generated. The higher the voltage is, the higher the generated
energy will be, which will increase the abrasion of the contacts and
contact relocation phenomena. Be sure to use the Switch within the
rated conditions.
•If the load is a minute voltage or current load, use a dedicated
Switch for minute loads. The reliability of silver-plated contacts,
which are used by standard Switches, will be insufficient if the load
is a minute voltage or current load.
Solenoid
(Approximately
10 to 20 times higher)
Incandescent lamp
(Approximately
10 to 15 times higher)
Motor
(Approximately
5 to 10 times higher)
Relay
(Approximately
4 to 5 times higher)
Operating forceContact force
Stroke
Stroke
FP
OTP
Changes to opposite side
Changes to opposite side
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(c)Copyright OMRON Corporation 2007 All Rights Reserved.
nnnnnnnn yyyyy omRon
Technical Guide for Limit Switches
Contact Protective Circuit
Apply a contact protective circuit to increase the contact durability,
prevent noise, and suppress the generation of carbide or nitric acid.
Be sure to apply the contact protective circuit correctly, otherwise an
adverse effect may occur.
The following provides typical examples of contact protective circuits.
If the Switch is used in an excessively humid location for switching a
load that easily generates arcs, such as an inductive load, the arcs
may generate NOx, which will change into HNO3 if it reacts with
moisture.
Consequently, the internal metal parts may corrode and the Switch
may fail. Be sure to select the ideal contact preventive circuit from the
following.
Also, load operating times may be delayed somewhat if a contact
protective circuit (a surge killer) is used.
Typical Examples of Contact Protective Circuits
Do not apply contact protective circuits (surge killers) as shown below.
Using Switches for Micro Loads
Contact faults may occur if a Switch for a general-load is used to
switch a micro load circuit. Use switches in the ranges shown in the
diagram on the right. However, even when using micro load models
within the operating range shown here, if inrush current occurs when
the contact is opened or closed, it may increase contact wear and so
decrease durability. Therefore, insert a contact protection circuit
where necessary. The minimum applicable load is the N-level
reference value. This value indicates the malfunction reference level
for the reliability level of 60% (λ60).
The equation, λ60 = 0.5 × 10–6/operations indicates that the estimated
malfunction rate is less than 1/2,000,000 operations with a reliability
level of 60%.
Circuit example
Applicable
current Feature and details Element selection
AC DC
CR circuit
Condi-
tional *O* When AC is switched, the load impedance must
be lower than the CR impedance.
C: 1 to 0.5 μF× switching current (A)
R: 0.5 to 1 Ω× switching voltage (V)
The values may change according to the charac-
teristics of the load.
The capacitor suppresses the spark discharge of
current when the contacts are open. The resistor
limits the inrush current when the contacts are
closed again. Consider the roles of the capacitor
and resistor and determine ideal capacitance and
resistance values through testing.
Generally, use a capacitor that has a dielectric
strength of between 200 and 300 V. Use an AC ca-
pacitor for an AC circuit, i.e., a capacitor that has no
polarity.
If, however, the arc shutoff capacity between the con-
tacts is a problem at high DC voltages, it may be more
effective to connect a capacitor and resistor across
the contacts rather than the load. Performing testing
to determine the most suitable method.
OO
The operating time will be greater if the load is a re-
lay or solenoid.
Connecting the CR circuit in parallel to the load is
effective when the power supply voltage is 24 or 48
V and in parallel to the contacts when the power
supply voltage is 100 to 200 V.
Diode
method ×O
Energy stored in the coil is changed into current by
the diode connected in parallel to the load. Then
the current flowing to the coil is consumed and
Joule heat is generated by the resistance of the in-
ductive load. The reset time delay with this method
is longer than that in the CR method.
The diode must withstand a peak inverse voltage
10 times higher than the circuit voltage and a for-
ward current as high or higher than the load cur-
rent.
Diode and
Zener diode
method
×OThis method will be effective if the reset time delay
caused by the diode method is too long.
If a suitable Zener voltage is not used, the load may
fail to operate depending on the environment. Use
a Zener diode with a Zener voltage that is about 1.2
times the power supply voltage.
Varistor
method OO
This method makes use of constant-voltage char-
acteristic of the varistor so that no high voltage is
imposed on the contacts. This method causes a re-
set time delay.
Connecting a varistor in parallel to the load is effec-
tive when the supply voltage is 24 to 48 V and in
parallel to the contacts when the supply voltage is
100 to 200 V.
Select a varistor with a cut voltage Vc that satisfies
the following formula. For AC, the voltage must be
multiplied by the square root of 2.
Vc > Power supply voltage × 1.5
If Vc is set too high, effectiveness will be reduced
because high voltages will not be cut.
This circuit effectively suppresses arcs when
the contacts are OFF. When the contacts are
open, capacity is stored in the capacitor, and
short-circuit current of the capacitor will flow
when the contacts are turned ON, which may
cause contacts to weld.
This circuit effectively suppresses arcs when
the contacts are OFF. When the contacts are
ON again, however, charge current will flow to
the capacitor, which may result in contact weld.
CR
Inductive
load
Power
supply
C
R
Inductive
load
Power
supply
Inductive
load
Power
supply
Inductive
load
Power
supply
Inductive
load
Power
supply
Load
Power
supply
CCLoad
Power
supply
30
24
12
5
01 10 100 1,0000.1
1 mA
Operating range
for micro-load
models
26 mA0.16 mA
800 mW5 mW
100 mA 160 mA
Unusable
range
Voltage (V)
Current (mA)
Operating range
for standard
models
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(c)Copyright OMRON Corporation 2007 All Rights Reserved.
omRon
Technical Guide for Limit Switches
Connections
•Do not connect a Single Limit Switch to two power supplies that are
different in polarity or type.
•Do not design a circuit where voltage is imposed between contacts,
otherwise contact welding may result.
•Do not use a circuit that will short-circuit if an error occurs,
otherwise the charged part may melt and break off.
•Application of Switch to a Low-voltage, Low-current Electronic
Circuit.
1. If bouncing or chattering of the contacts results and causes
problems, take the following countermeasures.
(a)Insert an integral circuit.
(b)Suppress the generation of pulse from the contact bouncing
or chattering of the contacts so that it is less than the noise
margin of the load.
2. Conventional silver-plated contacts are not suited to this
application. Use gold-plated contacts, which are ideal for
handling minute voltage or current loads.
3. The contacts of the Switch used for an emergency stop must be
normally closed with a positive opening mechanism.
•In order to protect the Switch from damage due to short-circuits, be
sure to connect a quick-response fuse with a breaking current 1.5
to 2 times larger than the rated current to the Switch in series. When
complying with EN approved ratings, use a 10-A IEC 60269-
compliant gI or gG fuse.
Operating Environment
•Do not use the Switch by itself in atmospheres containing
flammable or explosive gases. Arcs and heating resulting from
switching may cause fire or explosion.
•Use protective covers to protect Switches that are not specified as
waterproof or airtight whenever they are used in locations subject
to splattering or spraying oil or water, or to accumulation of dust or
dirt.
•The materials of Limit Switch may change in quality or deteriorate
if the Limit Switch is used outdoors or any other location where the
Limit Switch is exposed to special machining oil. Consult your
OMRON representative before selecting the model.
•Be sure to install the Switch so that the Switch is free from dust or
metal powder. The actuator and the switch casing must be
protected from the accumulation of dust or metal powder.
•Do not use the Switch in locations where the Switch is exposed to
hot water at a temperature greater than 60°C or steam.
•Do not use the Switch under temperatures or other environmental
conditions not within the specified ranges.
The rated permissible ambient temperature range varies with the
model. Refer to the specifications in this catalog. If the Switch is
exposed to radical temperature changes, the thermal shock may
deform the Switch and the Switch may malfunction.
•Be sure to protect the Switch with a cover if the Switch is in a
location where the Switch may be actuated by mistake or where the
Switch is likely cause an accident.
•If vibration or shock is continuously imposed on the Switch, contact
failure, malfunction, or decrease in service life may be caused by
abrasive powder generated from the internal parts. If excessive
vibration or shock is imposed on the Switch, the contacts may
malfunction or become damaged. Make sure to install the Switch in
locations free of constant vibration or shock.
•Do not use the Switch with silver-plated contacts for long periods if
the switching frequency of the Switch is comparatively low or the
load is minute. Otherwise, sulfuric film will be generated on the
contacts and contact failures may result. Use the Switch with gold-
plated contacts or use a dedicated Switch for minute loads instead.
Incorrect
Correct
NC
NO
Connect the load to the same polarities.
NC
NO
Power Connection Examples
(Connection of Different Polarities)
Incorrect
NC
NO
L
L
AC
DC
Incorrect Power Connection Example
(Connection of Different Power Supplies)
There is a risk of AC and DC mixing.
Incorrect
L
100 V
200 V
NC
NO
NC
NO
LL
Correct
Incorrect
Terminal box Terminal box
Incorrect Correct
Separate the Switch
from hot water.
Incorrect Correct
(Malfunction prevented)
Correct
Incorrect
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(c)Copyright OMRON Corporation 2007 All Rights Reserved.
omRon
Technical Guide for Limit Switches
•Do not use the Switch in locations with corrosive gas, such as
sulfuric gas (H2S or SO2), ammonium gas (NH3), nitric gas (HNO3),
or chlorine gas (Cl2), or high temperature and humidity. Otherwise,
contact failure or corrosion damage may result.
•If the Switch is used in locations with silicone gas, arc energy may
create silicon dioxide (SiO2) on the contacts and a contact failure
may result. If there is silicone oil, silicone sealant, or wire covered
with silicone close to the Switch, attach a contact protective circuit
to suppress the arcing of the Switch or eliminate the source of
silicone gas generation.
Regular Inspection and Replacement
•If the Switch is normally closed with low switching frequency (e.g.,
once or less than once a day), a reset failure may result due to the
deterioration of the parts of the Switch. Regularly inspect the Switch
and make sure that the Switch is in good working order.
•In addition to the mechanical durability or electrical durability of the
Switch described previously, the durability of the Switch may
decrease due to the deterioration of each part, especially rubber,
resin, and metal. Regularly inspect the Switch and replace any part
that has deteriorated in order to prevent accidents from occurring.
•If the Switch is not turned On or OFF for a long time, oxidation of
the contacts may decrease contact reliability. Faulty continuity may
result in accidents.
•Be sure to mount the Switch securely in a clean location to ensure
ease of inspection and replacement. The Switch with operation
indicator is available, which is ideal if the location is dark or does
not allow easy inspection or replacement.
Storage of Switch
•When storing the Switch, make sure that the location is free of
corrosive gas, such as H2S, SO2, NH3, HNO3, or Cl2, or dust and
does not have a high temperature or humidity.
•Be sure to inspect the Switch before use if it has been stored for
three months or more.
Weather Resistance, Cold Resistance, and Heat
Resistance
Silicon rubber is used to increase resistance to weather, cold, and
heat. Silicon rubber, however, can generate silicon gas. (This can
occur at room temperature, but the amount of silicon gas generated
increases at higher temperatures.) Silicon gas will react as a result of
arc energy and form silicon oxide (SiO2). If silicon oxide accumulates
on the contacts, contact interference can occur and can interfere with
the device. Before using a Switch, test it under actual application
conditions (including the environment and operating frequency) to
confirm that no problems will occur in actual.
Outdoor Use
•If the Limit Switch is used in places with sludge or dust powder
spray, make sure that the mechanical parts are sealed with a
rubber cap.
•The rubber materials exposed to ozone may deteriorate. Check
that the rubber parts are made of environment-resistive materials,
such as chloroprene, silicone, or fluorine rubber.
•Due to capillary attraction, rainwater may enter the Limit Switch
through the lead wires or sheath. Be sure to cover the wire
connections in a terminal box so that they are not directly exposed
to rainwater.
•If the Limit Switch is used outdoors, the steel parts of the Limit
Switch (such as the screws and plunger parts) may corrode.
Models with resistance against climatic conditions have been
added to the series. Consider using outdoor models, such as the
WL-@P1 or D4C-@P.
•"Limit Switch is used outdoors" refers to an environment where the
Limit Switch is exposed directly to rainwater or sunlight (e.g.,
multistory parking facilities) excluding locations with corrosive gas
or salty breezes. A Limit Switch used outdoors may not release due
to icing and may not satisfy specified standards.
Operation
•Carefully determine the position and shape of the dog or cam so
that the actuator will not abruptly snap back, thus causing shock. In
order to operate the Limit Switch at a comparatively high speed,
use a dog or cam that keeps the Limit Switch turned ON for a
sufficient time so that the relay or valve will be sufficiently
energized.
•The method of operation, the shape of the cam or dog, the
operating frequency, and the travel after operation have a large
influence on the durability and operating accuracy of the Limit
Switch. The cam or dog must be smooth in shape.
•Appropriate force must be imposed on the actuator by the cam or
dog in both rotary operation and linear operation.
If the dog touches the lever as shown below, the operating position
will not be stable.
Easy to inspect
Difficult to inspect or install
The cover must be located in the
direction ensuring ease of
maintenance or inspection.
Incorrect Correct
Snapped
back
Abruptly
actuated
Incorrect Correct
Snapped
back Abruptly
actuated
Incorrect
Dog Dog
Correct
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(c)Copyright OMRON Corporation 2007 All Rights Reserved.
omRon
Technical Guide for Limit Switches
•Unbalanced force must not be imposed on the actuator. Otherwise,
wear and tear on the actuator may result.
•With a roller actuator, the dog must touch the actuator at a right
angle. The actuator or shaft may deform or break if the dog touches
the actuator (roller) at an oblique angle.
•Make sure that the actuator does not exceed the OT (overtravel)
range, otherwise the Limit Switch may malfunction. When mounting
the Limit Switch, be sure to adjust the Limit Switch carefully while
considering the whole movement of the actuator.
•The Limit Switch may soon malfunction if the OT is excessive.
Therefore, adjustments and careful consideration of the position of
the Limit Switch and the expected OT of the operating body are
necessary when mounting the Limit Switch.
•When using a pin-plunger actuator, make sure that the stroke of the
actuator and the movement of the dog are located along a single
straight line.
•Be sure to use the Limit Switch according to the characteristics of
the actuator.
If a roller arm lever actuator is used, do not attempt to actuate the
Limit Switch in the direction shown below.
•Do not modify the actuator to change the OP.
•With the long actuator of an Adjustable Roller Lever Switch, the
following countermeasures against lever shaking are
recommended.
1.Make the rear edge of the dog smooth with an angle of 15° to 30°
or make it in the shape of a quadratic curve.
2.Design the circuit so that no error signal will be generated.
3.Use a switch that is actuated in one direction only. (Alternatively,
set the Switch so that it is operated only in one direction.)
•With a bevel plunger actuator, make sure that the width of the dog
is wider than that of the plunger.
Incorrect Correct
RollerRoller
Dog Dog
CorrectIncorrect
Dog
Dog
Operating
body
Install a stopper.
PT (Pretravel)
FP (Free position)
OP (Operating position)
OT (Overtravel)
TTP (Total travel position)
Reference line
70% of
rated OT 100% of
rated OT
Distance to the
optimum setting range.
Optimum setting range
Correct
Stopper
Incorrect Correct
Operating
body
Operating
body
Incorrect
Incorrect Correct
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Technical Guide for Limit Switches
Dog Design
Speed and Angle of Dog and Relationship with Actuator
Before designing a dog, carefully consider the operating speed and angle of the dog (φ) and their relationship with the shape of the actuator. The
optimum operating speed (V) of a standard dog at an angle of 30° to 45° is 0.5 m/s maximum.
Roller Lever Switches
(1) Non-overtravel Dog
Note: The above y values indicate the ratio ranges based on TT (total travel).
Therefore, the optimum pressing distance of the dog is between 50% and
80% (or 50% and 70%).
(2) Overtravel Dog
If the speed of the overtravel dog is comparatively high, make the rear
edge of the dog smooth at an angle of 15° to 30° or make it in the
shape of a quadratic curve. Then lever shaking will be reduced.
Note: The above y values indicate the ratio ranges based on TT (total travel).
Therefore, the optimum pressing distance of the dog is between 50% and
80% (or 50% and 70%).
Plunger Switches
If the dog overrides the actuator, the front and rear of the dog may be
the same in shape, provided that the dog is not designed to be
separated from the actuator abruptly.
Fork Lever Lock Models
Note: Design the shape of the dog so that it does not come in contact with the
other roller lever when the actuator is inverted.
Dog speed: 0.5 m/s max. (standard speed)
Dog speed: 0.5 m/s ≤ V ≤ 2 m/s (high speed)
θ φ V max. (m/s) y
45°45°0.5 0.5 to 0.8 (TT)
50°40°0.6 0.5 to 0.8 (TT)
60° to 55°30° to 35°1.3 0.5 to 0.7 (TT)
75° to 65°15° to 25°2 0.5 to 0.7 (TT)
Dog speed: 0.5 m/s max.
Dog speed: 0.5 m/s min.
θ φ V max. (m/s) y
45°45°0.5 0.5 to 0.8 (TT)
50°40°0.6 0.5 to 0.8 (TT)
60° to 55°30° to 35°1.3 0.5 to 0.7 (TT)
75° to 65°15° to 25°2 0.5 to 0.7 (TT)
φ
Lever set
vertically
φ
V max. (m/s)
y
30°
45°
60°
60° to 90°
0.4
0.25
0.1
0.05 (low speed)
0.8 (TT)
80% of to-
tal travel
φ
Change lever set angle (θ)
according to dog angle (φ)
φ
φ
Lever set
vertically
φ
V max. (m/s)
y
30°
45°
60°
60
°
to 90
°
0.4
0.25
0.1
0.05 (low speed)
0.8 (TT)
80% of to-
tal travel
15 to 30°
60° max.
φ
Roller Plunger
Ball Plunger
Bevel Plunger
φφ
V max. (m/s)
y
30°
20°
0.25
0.5
0.6 to 0.8 (TT)
0.5 to 0.7 (TT)
φφ
V max. (m/s)
y
30°
20°
0.25
0.5
0.6 to 0.8 (TT)
0.5 to 0.7 (TT)
φ
Note: The above y values indicate the ratio
ranges based on TT (total travel).
Therefore, the optimum pressing
distance of the dog is between 60%
and 80% (or 50% and 70%).
φ
V max. (m/s)
y
30°
20°
0.25
0.5
0.6 to 0.8 (TT)
0.5 to 0.7 (TT)
60°
27.6
10
Dog
45°45°
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(c)Copyright OMRON Corporation 2007 All Rights Reserved.
OITIROD
Technical Guide for Limit Switches
Stroke Settings vs. Dog Movement Distance
•The following information on stroke settings is based on the
movement distance of the dog instead of the actuator angle.
The following is the optimum stroke of the Limit Switch.
Optimum stroke: PT + {Rated OT × (0.7 to 1.0)}
In terms of angles, the optimum stroke is expressed as θ1+θ2.
•The movement distance of the dog based on the optimum stroke is
expressed by the following formula.
Movement distance of dog
φ: Dog angle
θ: Optimum stroke angle
R: Actuator length
X: Dog movement distance
•The distance between the reference line and the bottom of the dog
based on the optimum stroke is expressed by the following formula.
Y = a + b + r (mm)
a: Distance between reference line and actuator fulcrum
b: R cosθ
r: Roller radius
Y: Distance between reference line and bottom of dog
Dog Surface
The surface of dog touching the actuator should be 6.3 S in quality
and a hardness of approximately HV450.
For smooth operation of the actuator, apply molybdenum disulfide
grease to the actuator and the dog touching the actuator. This is ideal
for Limit Switches of drip-proof construction and Multiple Limit
Switches.
Maintenance and Repairs
The user of the system must not attempt to perform maintenance and
repairs. Contact the manufacturer of the system concerning
maintenance and repairs.
Other
•The standard material for the switch seal is nitrile rubber (NBR),
which has superior resistance to oil. Depending on the type of oil or
chemicals in the application environment, however, NBR may
deteriorate, e.g., swell or shrink. Confirm performance in advance.
•The correct Switch must be selected for the load to ensure contact
reliability. Refer to precautions for micro loads in individual product
information for details.
•When using a Limit Switch with a long lever or long rod lever, make
sure that the lever is in the downward direction.
•Wire the leads as shown in the following diagram.
•Reduced ambient temperature tends to result in hardening of the
actuator's rubber seal. Therefore, reset may be delayed or reset
may fail if the Switch is used with the actuator continually pressed
in. Contact your OMRON representative if the Switch is to be used
for this type of environment or application.
X = Rsinθ + R (1–cosθ)(mm)
tanφ
70% to 100% of rated OT
PT: Pretravel
OT: Overtravel
φ
Dog
Reference line
Mounting hole
Y
Dog
Crimp terminal with insulating sheath
Terminal screw Terminal
screw
TerminalTerminal
Crimped location facing up Lead
Lead
Correct Wiring
Crimp terminal with insulating sheath
Terminal screw Terminal
screw
Terminal Terminal
Too close to maintain dielectric strength
Crimped location facing down Lead
Lead
Incorrect Wiring
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(c)Copyright OMRON Corporation 2007 All Rights Reserved.
2007.3
OMRON Corporation
Industrial Automation Company
http://www.ia.omron.com/ (c)Copyright OMRON Corporation 2007 All Rights Reserved.
In the interest of product improvement, specifications are subject to change without notice.
Read and Understand This Catalog
Please read and understand this catalog before purchasing the products. Please consult your OMRON representative if you have any questions or
comments.
Warranty and Limitations of Liability
WARRANTY
OMRON's exclusive warranty is that the products are free from defects in materials and workmanship for a period of one year (or other period if
specifi ed) from date of sale by OMRON.
OMRON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED, REGARDING NON-INFRINGEMENT, MERCHANTABILITY, OR
FITNESS FOR PARTICULAR PURPOSE OF THE PRODUCTS. ANY BUYER OR USER ACKNOWLEDGES THAT THE BUYER OR USER ALONE
HAS DETERMINED THAT THE PRODUCTS WILL SUITABLY MEET THE REQUIREMENTS OF THEIR INTENDED USE. OMRON DISCLAIMS ALL
OTHER WARRANTIES, EXPRESS OR IMPLIED.
LIMITATIONS OF LIABILITY
OMRON SHALL NOT BE RESPONSIBLE FOR SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES, LOSS OF PROFITS, OR COMMERCIAL
LOSS IN ANY WAY CONNECTED WITH THE PRODUCTS, WHETHER SUCH CLAIM IS BASED ON CONTRACT, WARRANTY, NEGLIGENCE, OR
STRICT LIABILITY.
In no event shall responsibility of OMRON for any act exceed the individual price of the product on which liability is asserted.
IN NO EVENT SHALL OMRON BE RESPONSIBLE FOR WARRANTY, REPAIR, OR OTHER CLAIMS REGARDING THE PRODUCTS UNLESS
OMRON'S ANALYSIS CONFIRMS THAT THE PRODUCTS WERE PROPERLY HANDLED, STORED, INSTALLED, AND MAINTAINED AND NOT
SUBJECT TO CONTAMINATION, ABUSE, MISUSE, OR INAPPROPRIATE MODIFICATION OR REPAIR.
Application Considerations
SUITABILITY FOR USE
OMRON shall not be responsible for conformity with any standards, codes, or regulations that apply to the combination of products in the customer's
application or use of the product.
At the customer's request, OMRON will provide applicable third party certifi cation documents identifying ratings and limitations of use that apply to the
products. This information by itself is not suffi cient for a complete determination of the suitability of the products in combination with the end product,
machine, system, or other application or use.
The following are some examples of applications for which particular attention must be given. This is not intended to be an exhaustive list of all possible
uses of the products, nor is it intended to imply that the uses listed may be suitable for the products:
• Outdoor use, uses involving potential chemical contamination or electrical interference, or conditions or uses not described in this catalog.
• Nuclear energy control systems, combustion systems, railroad systems, aviation systems, medical equipment, amusement machines, vehicles, safety
equipment, and installations subject to separate industry or government regulations.
• Systems, machines, and equipment that could present a risk to life or property.
Please know and observe all prohibitions of use applicable to the products.
NEVER USE THE PRODUCTS FOR AN APPLICATION INVOLVING SERIOUS RISK TO LIFE OR PROPERTY WITHOUT ENSURING THAT THE
SYSTEM AS A WHOLE HAS BEEN DESIGNED TO ADDRESS THE RISKS, AND THAT THE OMRON PRODUCT IS PROPERLY RATED AND
INSTALLED FOR THE INTENDED USE WITHIN THE OVERALL EQUIPMENT OR SYSTEM.
Disclaimers
CHANGE IN SPECIFICATIONS
Product specifi cations and accessories may be changed at any time based on improvements and other reasons.
It is our practice to change model numbers when published ratings or features are changed, or when signifi cant construction changes are made.
However, some specifi cations of the product may be changed without any notice. When in doubt, special model numbers may be assigned to fi x
or establish key specifi cations for your application on your request. Please consult with your OMRON representative at any time to confi rm actual
specifi cations of purchased product.
DIMENSIONS AND WEIGHTS
Dimensions and weights are nominal and are not to be used for manufacturing purposes, even when tolerances are shown.
ERRORS AND OMISSIONS
The information in this catalog has been carefully checked and is believed to be accurate; however, no responsibility is assumed for clerical,
typographical, or proofreading errors, or omissions.
PERFORMANCE DATA
Performance data given in this catalog is provided as a guide for the user in determining suitability and does not constitute a warranty. It may represent
the result of OMRON’s test conditions, and the users must correlate it to actual application requirements. Actual performance is subject to the OMRON
Warranty and Limitations of Liability.
PROGRAMMABLE PRODUCTS
OMRON shall not be responsible for the user's programming of a programmable product, or any consequence thereof.
COPYRIGHT AND COPY PERMISSION
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