Allen-Bradley 440N-G02143 Guardmaster Safety Switch

Product Overview

The Allen-Bradley 440N-G02143 Guardmaster Safety Switch is a non-contact magnetic safety interlock switch designed for machine guarding applications. It uses reed switch technology to monitor the position of safety doors, gates, and protective covers. When the guard is opened, the safety circuit is interrupted to help prevent hazardous machine operation. The unit features a stainless steel housing, 24VDC operation, 2 normally closed safety contacts, 1 normally open auxiliary contact, and a 6 m cable.

Specifications

Advantages & Features

• Non-contact magnetic safety detection design
• No mechanical wear, providing long service life
• Stainless steel housing for harsh industrial environments
• Reliable safety door and guard monitoring
• Dual normally closed safety contacts improve safety reliability
• Easy installation with pre-wired 6 m cable
• Suitable for machine safety circuits and interlock systems
• Helps reduce risk during machine operation

Applications

• Industrial Automation Equipment
• Machine Safety Guarding
• Safety Doors and Protective Covers
• Packaging Machinery
• CNC Machines
• Manufacturing Production Lines
• Robotic Work Cells
• Factory Automation Systems

Precautions

• Confirm actuator alignment before operation.
• Verify safety relay/controller compatibility.
• Ensure correct wiring of safety contacts.
• Avoid strong magnetic interference near the switch.
• Inspect cable condition regularly.
• Disconnect power before installation or maintenance.