D4B-_N

Features

Limit switch with metal housing

The D4B-_N 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-_N 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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