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Allen Bradley

Allen Bradley 440R-S12R2 Guardmaster Single Input Safety Relay

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ManufacturerAllen Bradley

Part number440R-S12R2

Power Supply 24V DC

Input 1 Dual Channel Universal Input

Safety Outputs 2

Auxiliary Outputs 1 NC Solid State

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Veteran-owned

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Single Input Design 2 Safety Outputs 1 NC Auxiliary Output 24V DC Operation Solid State Auxiliary Output Monitoring of Safety Circuits

Product description

The Allen-Bradley 440R-S12R2 is a Guardmaster single-input safety relay designed for monitoring safety-related circuits. It operates on 24V DC and features a single dual-channel universal input. This relay provides two safety outputs and one normally closed (NC) solid-state auxiliary output, making it suitable for basic safety functions.

This safety relay is commonly used for monitoring emergency-stop circuits, proximity switches, and other safety devices in industrial machinery. Its single-input design simplifies wiring for smaller safety applications and standalone machines.

Stanlo Automation, a veteran-owned distributor of surplus industrial automation parts, offers the Allen Bradley 440R-S12R2. Find reliable components for your automation needs with us.

Technical specifications

Power Supply	24V DC
Input	1 Dual Channel Universal Input
Safety Outputs	2
Auxiliary Outputs	1 NC Solid State
Series	Guardmaster

Common applications

Emergency Stop Monitoring

Proximity Switch Monitoring

Safety Interlocks

Machine Safety

Industrial Control

Compatible systems

Works with 24V DC control systems and dual-channel safety input devices.

Also known as

Allen-Bradley Guardmaster SI 440R-S12R2 Safety Relay

Replaces / compatible with

Suitable for monitoring basic safety inputs and circuits.

Technical note

Expert tip

This relay is designed for applications requiring a basic safety monitoring function with a single input channel.

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Frequently asked questions

What type of input does the Allen Bradley 440R-S12R2 safety relay accept?

The Allen Bradley 440R-S12R2 safety relay accepts a single dual-channel universal input. This allows it to monitor safety devices such as emergency stop buttons or safety switches with dual channel outputs.