Page top

Lead Contents

Safety Limit Switch

D4B-[]N

D4B-[]N

Snap-action contact with certified direct opening operation certification Maintenance, seal, and resistance to shock increased and direct opening mechanism added. Three-conduit switches and 2NC switches are also available

Primary Contents



Set Model Numbers

Consult with your OMRON representative when ordering any models that are not listed in this table.

Safety Limit Switches (with Direct Opening Mechanism)

ActuatorConduit openings1NC/1NO (Snap-action)1NC/1NO (Slow-action)2NC (Slow-action)
ModelDirect
opening
ModelDirect
opening
ModelDirect
opening
Roller lever
(resin roller)
Pg13.5D4B-1111N
D4B-1511N
D4B-1A11N
G1/2 (PF1/2)D4B-2111ND4B-2511ND4B-2A11N
1/2-14NPTD4B-3111ND4B-3511ND4B-3A11N
M20D4B-4111ND4B-4511ND4B-4A11N
Pg13.5 (3-conduit)D4B-5111ND4B-5511ND4B-5A11N
G1/2 (3-conduit)D4B-6111ND4B-6511ND4B-6A11N
1/2-14NPT (3-conduit)D4B-7111ND4B-7511ND4B-7A11N
M20 (3-conduit)D4B-8111ND4B-8511ND4B-8A11N
Roller lever
(stainless
steel roller)
Pg13.5D4B-1115N
D4B-1515N
D4B-1A15N
G1/2 (PF1/2)D4B-2115ND4B-2515ND4B-2A15N
1/2-14NPTD4B-3115ND4B-3515ND4B-3A15N
M20D4B-4115ND4B-4515ND4B-4A15N
Pg13.5 (3-conduit)D4B-5115ND4B-5515ND4B-5A15N
Top plunger
Pg13.5D4B-1170N
D4B-1570N
D4B-1A70N
G1/2 (PF1/2)D4B-2170ND4B-2570ND4B-2A70N
1/2-14NPTD4B-3170ND4B-3570ND4B-3A70N
M20D4B-4170ND4B-4570ND4B-4A70N
Pg13.5 (3-conduit)D4B-5170ND4B-5570ND4B-5A70N
G1/2 (3-conduit)D4B-6170ND4B-6570ND4B-6A70N
1/2-14NPT (3-conduit)D4B-7170ND4B-7570ND4B-7A70N
M20 (3-conduit)D4B-8170ND4B-8570ND4B-8A70N
Top roller
plunger
Pg13.5D4B-1171N
D4B-1571N
D4B-1A71N
G1/2 (PF1/2)D4B-2171ND4B-2571ND4B-2A71N
1/2-14NPTD4B-3171ND4B-3571ND4B-3A71N
M20D4B-4171ND4B-4571ND4B-4A71N
Pg13.5 (3-conduit)D4B-5171ND4B-5571ND4B-5A71N
G1/2 (3-conduit)D4B-6171ND4B-6571ND4B-6A71N
1/2-14NPT (3-conduit)D4B-7171ND4B-7571ND4B-7A71N
M20 (3-conduit)D4B-8171ND4B-8571ND4B-8A71N

General-purpose Limit Switches

ActuatorConduit openings1NC/1NO (Snap-action)1NC/1NO (Slow-action)2NC (Slow-action)
ModelDirect
opening
ModelDirect
opening
ModelDirect
opening
Adjustable
roller lever
Pg13.5D4B-1116N---D4B-1516N---D4B-1A16N---
G1/2 (PF1/2)D4B-2116ND4B-2516ND4B-2A16N
1/2-14NPTD4B-3116ND4B-3516ND4B-3A16N
Pg13.5 (3-conduit)D4B-5116ND4B-5516ND4B-5A16N
G1/2 (3-conduit)D4B-6116ND4B-6516ND4B-6A16N
1/2-14NPT (3-conduit)D4B-7116ND4B-7516ND4B-7A16N
Adjustable
rod lever
Pg13.5D4B-1117N---D4B-1517N---D4B-1A17N---
G1/2 (PF1/2)D4B-2117ND4B-2517ND4B-2A17N
1/2-14NPTD4B-3117ND4B-3517ND4B-3A17N
Pg13.5 (3-conduit)D4B-5117ND4B-5517ND4B-5A17N
G1/2 (3-conduit)D4B-6117ND4B-6517ND4B-6A17N
1/2-14NPT (3-conduit)D4B-7117ND4B-7517ND4B-7A17N
Coil spring
(non-directional)
Pg13.5D4B-1181N------D4B-1A81N---
G1/2 (PF1/2)D4B-2181ND4B-2A81N
1/2-14NPTD4B-3181ND4B-3A81N
Pg13.5 (3-conduit)D4B-5181ND4B-5A81N
G1/2 (3-conduit)D4B-6181ND4B-6A81N
1/2-14NPT (3-conduit)D4B-7181ND4B-7A81N
Plastic rod
(non-directional)
Pg13.5D4B-1187N---D4B-1A87N---
G1/2 (PF1/2)D4B-2187ND4B-2A87N
1/2-14NPTD4B-3187ND4B-3A87N
Pg13.5 (3-conduit)D4B-5187ND4B-5A87N
G1/2 (3-conduit)D4B-6187ND4B-6A87N
1/2-14NPT (3-conduit)D4B-7187ND4B-7A87N

Note:

1.In addition to the above models, models compatible with the previous D4B Switches (with standard rotary levers) are available.
Model number examples: D4B-1[]1RN(Pg13.5) or D4B-2[]1RN(PF1/2)

2.Consult your OMRON representative for products.

Replacement Parts

Switch Boxes

Conduit1-conduit type3-conduit type
Built-in switchPG13.5G1/21/2-14NPTPG13.5G1/21/2-14NPT
1NC/1NO (Snap-action)
D4B-1100ND4B-2100ND4B-3100ND4B-5100ND4B-6100ND4B-7100N
1NC/1NO (Slow-action)
D4B-1500ND4B-2500ND4B-3500ND4B-5500ND4B-6500ND4B-7500N
2NC (Slow-action)
D4B-1A00ND4B-2A00ND4B-3A00ND4B-5A00ND4B-6A00ND4B-7A00N

Operating Heads

ActuatorTypeModel
Side rotary *StandardD4B-0010N
Top plungerPlainD4B-0070N
Top roller plungerD4B-0071N
Flexible-rodCoil springD4B-0081N
Plastic rodD4B-0087N

*The Lever is not included with the Side Rotary Operating Head.

Levers

ActuatorLength (mm)Diameter of rollerModel
Standard31.517.5 dia.D4B-0001N
Stainless steel roller lever31.517.5 dia.D4B-0005N
Adjustable roller lever25 to 8919 dia.D4B-0006N
Adjustable rod lever145 max.---D4B-0007N
Interchangeable with D4B-000133.719 dia.D4B-000RN

*Other types of lever are also available.