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Allen Bradley

Allen Bradley 440R-N23135 Guardmaster Safety Relay

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ManufacturerAllen Bradley

Part number440R-N23135

Power Supply 24V AC/DC

Safety Outputs 3 NO

Auxiliary Outputs 1 NC

Enclosure 22.5 mm

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3 NO Safety Outputs 1 NC Auxiliary Output 24V AC/DC Operation Manual Monitored Reset Compact 22.5mm Width DIN Rail Mountable

Product description

The Allen-Bradley 440R-N23135 is a Guardmaster MSR127RP safety relay designed for monitoring safety-related circuits. It operates on 24V AC/DC and features 3 normally open (NO) safety outputs and 1 normally closed (NC) auxiliary output. Its compact 22.5 mm enclosure and DIN rail mounting make it suitable for various industrial control panels.

This safety relay is ideal for applications such as monitoring emergency-stop circuits, proximity switches, and other safety devices in industries like manufacturing, material handling, and automotive. It helps ensure machine safety and compliance with safety standards.

Source your Allen-Bradley 440R-N23135 from Stanlo Automation, a trusted veteran-owned distributor. We offer reliable surplus industrial automation parts with a commitment to quality and customer service.

Technical specifications

Power Supply	24V AC/DC
Safety Outputs	3 NO
Auxiliary Outputs	1 NC
Enclosure	22.5 mm
Mounting	DIN Rail
Reset	Manual Monitored
Series	Guardmaster MSR127RP

Common applications

Emergency Stop Monitoring

Proximity Switch Monitoring

Safety Interlock Switches

Guard Monitoring

Machine Safety Circuits

Industrial Control Panels

Compatible systems

Industrial control panels with 24V AC/DC power sources.

Also known as

Allen-Bradley MSR127RP Guardmaster 440R-N23135

Replaces / compatible with

Compatible with various Allen-Bradley Guardmaster safety components.

Technical note

Expert tip

The MSR127RP model can be wired with one NC, two NC, or two PNP inputs from a light curtain, with fault detection across inputs when used in the two NC configuration.

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Frequently asked questions

What are the output configurations for the Allen Bradley 440R-N23135 safety relay?

The Allen Bradley 440R-N23135 features three normally open (NO) safety outputs and one normally closed (NC) auxiliary output. These are designed to provide reliable safety signaling and status indication in industrial automation systems.