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Allen Bradley

Allen Bradley 440N-Z21US2B Guardmaster Non-Contact Safety Switch

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ManufacturerAllen Bradley

Part number440N-Z21US2B

Contact Configuration 2 N.C. Safety, 1 N.O Aux

Contact Type Solid State Contacts

Connection Type M12 Plug-in, 8 Pin DC QD

Housing Material Plastic

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12-month warranty

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Veteran-owned

CAGE: 9NK75

2 N.C. safety outputs 1 N.O. auxiliary output Solid state contacts Rectangular plastic housing M12 8-pin QD connector Standard code actuator

Product description

The Allen-Bradley 440N-Z21US2B is a Guardmaster non-contact safety switch designed for reliable machine safety applications. It features a rectangular plastic housing and a standard code actuator, equipped with two normally closed (N.C.) safety outputs and one normally open (N.O.) auxiliary output. Solid-state contacts ensure dependable operation.

This safety switch is ideal for monitoring machine guards, doors, and access points in industrial environments. Its non-contact design contributes to longevity and reduced maintenance. The switch is suitable for integration into safety circuits with safety relays or controllers, ensuring compliance with safety regulations.

Stanlo Automation, a veteran-owned surplus parts distributor, offers the Allen-Bradley 440N-Z21US2B. We provide essential industrial components to keep your operations running efficiently and safely. Trust Stanlo Automation for your surplus MRO needs.

Technical specifications

Contact Configuration	2 N.C. Safety, 1 N.O Aux
Contact Type	Solid State Contacts
Connection Type	M12 Plug-in, 8 Pin DC QD
Housing Material	Plastic
Actuator	Rectangular
Voltage	24 VDC

Common applications

Machine guarding

Access control

Industrial automation

Safety interlocks

Assembly lines

Packaging machinery

Compatible systems

Safety relays Safety controllers Machine control panels

Also known as

440N-Z21US2B, Allen Bradley 440N, Guardmaster Safety Switch, Non-Contact Interlock

Replaces / compatible with

Compatible with Allen-Bradley Guardmaster 440N series accessories.

Technical note

Expert tip

The 8-pin M12 QD connector on the 440N-Z21US2B allows for a robust connection in industrial environments.

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Frequently asked questions

What are the contact configurations on the Allen-Bradley 440N-Z21US2B safety switch?

The Allen-Bradley 440N-Z21US2B safety switch is configured with two normally closed (N.C.) safety outputs and one normally open (N.O.) auxiliary output. This configuration is standard for many machine safety interlock applications.