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Safety Limit Switch
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
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Quick links OMRON IA Safety Limit Switches in your country.
Please contact our European headquarters.
Note: Omitted dimensions are the same as those for the Roller Lever Type Models
D4B-1[][][]N and D4B-5[][][]N have a PG13.5 conduit opening. D4B-2[][][]N and D4B-6[][][]N have a G1/2 conduit opening. D4B-3[][][]N and D4B-7[][][]N have a 1/2-14NPT conduit opening.
Switches
1-conduit Models
Roller Lever
D4B-[][]11N
* The lever can be set to any desired position by turning the operating position indicator.
Roller Lever (Stainless Steel Roller)
D4B-[][]15N
* The lever can be set to any desired position by turning the operating position indicator.
Adjustable Roller Lever
D4B-[][]16N
* The lever can be set to any desired position by turning the operating position indicator.
Adjustable Rod Lever
D4B-[][]17N
* The lever can be set to any desired position by turning the operating position indicator.
Note: Unless otherwise specified, a tolerance of ±0.4 mm applies to all dimensions.
Note: Variation occurs in the simultaneity of contact opening/closing operations of 2NC contacts. Check contact operation.
*1.The operating characteristics of these Switches were measured with the roller level set at 31.5 mm.
*2.The operating characteristics of these Switches were measured with the rod level set at 140 mm.
*3.Only for slow-action models.
*4.Only for snap-action models.
*5.Reference values.
*6.Must be provided to ensure safe operation.
Top Plunger
D4B-[][]70N
Top Roller Plunger
D4B-[][]71N
Note: Unless otherwise specified, a tolerance of ±0.4 mm applies to all dimensions.
Note: Variation occurs in the simultaneity of contact opening/closing operations of 2NC contacts. Check contact operation.
*1.Only for slow-action models.
*2.Only for snap-action models.
*3.Reference values.
*4.Must be provided to ensure safe operation.
Coil Spring (Non-directional)
D4B-[][]81N
Mechanically speaking, these models are general limit switches and not safety limit switches.
* Be sure to adjust the dog to within 40 mm from the top end of the coil spring.
Plastic Rod (Non-directional)
D4B-[][]87N
Mechanically speaking, these models are general limit switches and not safety limit switches.
* Be sure to adjust the dog to within 40 mm from the top end of the plastic rod.
Note: Unless otherwise specified, a tolerance of ±0.4 mm applies to all dimensions.
Note: Variation occurs in the simultaneity of contact opening/closing operations of 2NC contacts. Check contact operation.
3-conduit Switches
Roller Lever
D4B-[][]11N
* The lever can be set to any desired position by turning the operating position indicator.
Roller Lever
D4B-[][]15N
* The lever can be set to any desired position by turning the operating position indicator.
Adjustable Roller Lever
D4B-[][]16N
* The lever can be set to any desired position by turning the operating position indicator.
Adjustable Rod Lever
D4B-[][]17N
* The lever can be set to any desired position by turning the operating position indicator.
Note: Unless otherwise specified, a tolerance of ±0.4 mm applies to all dimensions.
Note: Variation occurs in the simultaneity of contact opening/closing operations of 2NC contacts. Check contact operation.
*1.The operating characteristics of these Switches were measured with the roller level set at 31.5 mm.
*2.The operating characteristics of these Switches were measured with the rod level set at 140 mm.
*3.Only for slow-action models.
*4.Only for snap-action models.
*5.Reference values.
*6.Must be provided to ensure safe operation.
Top Plunger
D4B-[][]70N
Top Roller Plunger
D4B-[][]71N
Note: Unless otherwise specified, a tolerance of ±0.4 mm applies to all dimensions.
Note: Variation occurs in the simultaneity of contact opening/closing operations of 2NC contacts. Check contact operation.
*1.Only for slow-action models.
*2.Only for snap-action models.
*3.Reference values.
*4.Must be provided to ensure safe operation.
Coil Spring
D4B-[][]81N
* Set the spring so that the dog comes in contact at a point 40 mm from the tip.
Plastic Rod
D4B-[][]87N
* Set the spring so that the dog comes in contact at a point 40 mm from the tip.
Note: Unless otherwise specified, a tolerance of ±0.4 mm applies to all dimensions.
Note: Variation occurs in the simultaneity of contact opening/closing operations of 2NC contacts. Check contact operation.
Levers
Roller Lever
D4B-0001N
Roller Lever (Stainless Steel Roller)
D4B-0005N
Adjustable Roller Lever
D4B-0006N
Adjustable Rod Lever
D4B-0007N
Roller Lever
(Compatible with Previous D4B Model)
D4B-000RN
Roller Lever
WL-1A118
Roller Lever
WL-1A106
Roller Lever
WL-1A300
Roller Lever
WL-1A400
Adjustable Rod Lever
WL-3A100
Spring Rod Lever
WL-4A201
Resin Loop Lever
D4A-F00
Note:
1. Unless otherwise specified, a tolerance of ±0.4 mm applies to all dimensions.
2. Safety Limit Switch specifications are satisfied with D4B-[][][][]N Levers only (example: D4B-0001N).
The D4B-0006N Adjustable Roller Lever and D4B-0007N Adjustable Rod Lever, however, cannot be used. Do not order them for a Side Rotary Operating Head.
Caution: All units are in millimeters unless otherwise indicated.