September 16, 2019

Omron D4B-5571N Safety Sensors Components SafetyLimitSwitch

Omron D4B-5571N Safety Sensors Components SafetyLimitSwitch - page 1

D-252

Safety Sensors / Components

Safety Limit Switch

D4B-

#

N

• Snap-action or slow-action contact for accurate 

switching with safe operation via a direct opening 

mechanism with metal deposition between mating 

contacts.

• Two sets of contacts: one (NC) for safety category 

circuit and the other (NO) for control circuit.

• Contacts opened by direct opening mechanism (NC 

contacts only), thus preventing faulty operation due 

to factors such as metal deposition.

• Wide standard operating temperature range: 

–40°C to 80°C (standard type).

• Safety of lever settings ensured using a mechanism 

that engages a gear between the operating position 

indicator plate and the lever.

• Equipped with a mechanism that indicates the appli-

cable operating zone, as well as push-button switch-

ing to control left and right motion.

• Conforms to EN (TÜV) standards corresponding to 

the CE marking.

• 3-conduit switches are available.

• Metric conduit types available.

Model Number Structure

Model Number Legend

1. Conduit

1:

PG13.5 (1-conduit)

2:

G1/2 (PF1/2) (1-conduit)

3:

1/2-14NPT (1-conduit)

4:

M20

5:

PG13.5 (3-conduit)

6:

G1/2 (PF1/2) (3-conduit)

7:

1/2-14NPT (3-conduit)

8:

M20 (3-conduit)

2. Built-in Switch

1:

1NC/1NO (snap-action)

3:

1NC/1NO (slow-action) gold-plated contacts

5:

1NC/1NO (slow-action) (see note)

A:

2NC (slow-action)

B:

2NC (slow-action) gold-plated contacts

Note: Excluding D4B-

##

81N and D4B-

##

87N models.

3. Actuator

00:

Switch box (without head)

11:

Roller lever (standard)

16:

Adjustable roller lever

17:

Adjustable rod lever

1R:

Roller lever

(conventional D4B-compatible)

70:

Top plunger

71:

Top roller plunger

81:

Coil spring

87:

Plastic rod

1   2     3

D4B-

####

N




D-252 Safety Sensors / Components Safety Limit Switch D4B- # N • Snap-action or slow-action contact for accurate  switching with safe operation via a direct opening  mechanism with metal deposition between mating  contacts. • Two sets of contacts: one (NC) for safety category  circuit and the other (NO) for control circuit. • Contacts opened by direct opening mechanism (NC  contacts only), thus preventing faulty operation due  to factors such as metal deposition. • Wide standard operating temperature range:  –40°C to 80°C (standard type). • Safety of lever settings ensured using a mechanism  that engages a gear between the operating position  indicator plate and the lever. • Equipped with a mechanism that

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