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Allen Bradley

Allen Bradley 440R-D22R2 Guardmaster Dual Input Safety Relay

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ManufacturerAllen Bradley

Part number440R-D22R2

Power Supply 24V DC

Safety Outputs 2 NO

Inputs Dual Universal Inputs

Performance Level PLe

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Veteran-owned

CAGE: 9NK75

Dual universal inputs 2 Normally Open safety outputs PLe and SIL 3 rated 24V DC operation DIN rail mounting

Product description

The Allen-Bradley 440R-D22R2 is a Guardmaster Dual Input Safety Relay designed for monitoring safety-related circuits. It features two universal inputs compatible with various safety devices and provides two Normally Open (NO) safety outputs. This relay operates on a 24V DC power supply and is rated for a performance level of PLe and SIL 3, ensuring high safety integrity.

This dual input safety relay is ideal for monitoring emergency-stop circuits, proximity switches, and safety mats in industrial machinery. Its compact 22mm width and DIN rail mounting make it easy to integrate into control panels. The relay is certified to UL, CUL, and KC standards.

Stanlo Automation, your veteran-owned surplus parts distributor, offers the Allen-Bradley 440R-D22R2. We provide reliable access to quality industrial automation components, ensuring your safety systems are up and running efficiently.

Technical specifications

Power Supply	24V DC
Safety Outputs	2 NO
Inputs	Dual Universal Inputs
Performance Level	PLe
SIL Rating	SIL 3
Width	22.5 mm

Common applications

Emergency-stop circuit monitoring

Proximity switch monitoring

Safety mat monitoring

Light curtain monitoring

Guard interlock monitoring

Also known as

Allen Bradley GSR Safety Relay, Guardmaster Dual Input Relay, 440R-D22R2 Safety Monitor

Replaces / compatible with

The 440R-D22R2 is a key component in modern safety systems and can replace older dual-input safety relays from Allen-Bradley or other manufacturers that meet similar safety specifications.

Technical note

Expert tip

This relay supports two-channel inputs, allowing for redundant safety inputs to enhance system reliability and detect faults in safety circuits.

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Frequently asked questions

What types of safety devices are compatible with the Allen Bradley 440R-D22R2 safety relay?

The Allen Bradley 440R-D22R2 safety relay features dual universal inputs that are compatible with a wide range of safety devices, including emergency-stop buttons, proximity switches, safety mats, and light curtains.