D4B

Features

Limit switch with metal housing

The D4B series of limit switches in a rugged metal housing is suitable for both safety and non-safety applications due to its direct opening mechanism and TÜV approval. Furthermore with the increased temperature range and enhanced mechanical switching lifetime, the D4B is first choice for all applications from standard to demanding environments and for highest flexibility in mounting and connectivity preferences.
  • Direct opening mechanism and approval by notified body
  • Rugged metal housing and extended mechanical switching lifetime (snap action models)
  • Terminal block for direct wiring
Specifications & ordering info

Ordering information

Actuator type

Connection method

Order code1

1NC/1NO (snap-action)

1NC/1NO (slow-action)

2NC (slow-action)

 

Roller lever2

Terminal block with
M20 conduit

D4B-4111N

D4B-4511N

D4B-4A11N

 

Adjustable roller lever

D4B-4116N

D4B-4516N

D4B-4A16N

 

Adjustable rod lever

D4B-4117N

D4B-4517N

D4B-4A17N

 

Plain

D4B-4170N

D4B-4570N

D4B-4A70N

 

Roller

D4B-4171N

D4B-4571N

D4B-4A71N

Specifications

Item

Snap-action

Slow-action

Durability3

Mechanical

30,000,000 operations min.

10,000,000 operations min.

Electrical

500,000 operations min. (at a 250 VAC, 10 A resistive load)

Operating speed

1 mm/s to 0.5 m/s

Operating frequency

Mechanical

120 operations/min

Electrical

30 operations/min

Rated frequency

50/60 Hz

Contact resistance

25 mΩ max. (initial value)

Pollution degree (operating environment)

3 (EN60947-5-1)

Conditional short-circuit current

100 A (EN60947-5-1)

Conventional enclosed thermal current (Ith)

20 A (EN60947-5-1)

Protection against electric shock

Class I (with ground terminal)

Ambient temperature

Operating

-40 to 80°C (with no icing)4

Degree of protection

IP67 (EN60947-5-1)

1NO/1NC Contact (Snap-action)

If metal deposition between mating contacts occurs on the NC contact side, they can be pulled apart by the shearing force and tensile force generated when part B of the safety cam or plunger engages part A of the movable contact blade. When the safety cam or plunger is moved in the direction of the arrow, the Limit Switch releases.

 

1NC/1NO Contact (Slow-action)

2NC Contact (Slow-action)


1. The NC contacts provide the approved direct opening mechanism.

2. For models with stainless steel rollers and temperature resistance of -40°C refer to WL-_-TC.

3. The values are acquired for an ambient temperature of 5 to 35°C and an ambient humidity of 40 to 70%.

4. -25 to 80°C for the flexible-rod actuator.

1. The NC contacts provide the approved direct opening mechanism.

2. For models with stainless steel rollers and temperature resistance of -40°C refer to WL-_-TC.

3. The values are acquired for an ambient temperature of 5 to 35°C and an ambient humidity of 40 to 70%.

4. -25 to 80°C for the flexible-rod actuator.

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