440N-Z21SS2A | Allen-Bradley Guardmaster Non-Contact Switch

Description 

The Allen-Bradley 440N-Z21SS2A is a Guardmaster non-contact safety switch with a rectangular plastic actuator, designed for safeguarding access to hazardous machine areas. It uses solid-state technology and delivers reliable, tamper-resistant operation in safety-critical environments.

Technical Specifications 

Information About 440N-Z21SS2A

The 440N-Z21SS2A is part of the Allen-Bradley 440N Guardmaster series and is engineered for non-contact safety applications. It operates with a 20.4–26.4 VDC supply voltage and is equipped with solid-state contacts, ensuring a long operational life and resistance to mechanical wear. This model features 2 normally closed (N.C.) safety outputs and 1 normally open (N.O.) auxiliary output, supporting safety monitoring and machine status indication.

Key Features:

• Non-Contact Safety Technology: Reduces wear and enables tamper-resistant safety switching

• Solid-State Outputs: Ensures durability with no mechanical contact wear

• 2 N.C. Safety + 1 N.O. Auxiliary Contact: Supports both safety circuit and status signaling

• 3 m PVC Cable Connection: Pre-wired for quick installation and flexible routing

• Wide Voltage Range (20.4–26.4 VDC): Compatible with standard safety control circuits

The 440N-Z21SS2A enhances machine safety with durable, contactless operation and easy integration into access control systems.

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