📝 Product Overview

The Allen-Bradley 440R-D22R2 Guardmaster Safety Relay is an industrial safety monitoring relay designed to monitor safety devices and support protective shutdown functions in machinery and automation systems. Manufactured by Allen-Bradley, a brand of Rockwell Automation, this relay is part of the Guardmaster safety relay family and is designed for applications requiring reliable monitoring of safety-related input signals.

The Allen-Bradley 440R-D22R2 is a dual-input safety relay with two dual-channel universal inputs. These inputs can be configured for compatible safety devices, depending on the selected input arrangement and the manufacturer’s wiring instructions. Typical applications include emergency-stop buttons, safety interlock switches, protective guard monitoring, and compatible safety sensors. Correct device compatibility and wiring must be confirmed before installation.

Operating from a 24V DC power supply, the relay processes the status of its safety inputs and controls its safety outputs according to the configured logic. It provides two normally open (N/O) safety outputs and one normally closed (N/C) solid-state auxiliary output. The safety outputs can be incorporated into a properly designed machine safety circuit, while the auxiliary output can support supplementary status monitoring where permitted by the product specifications.

A key feature of the Allen-Bradley 440R-D22R2 is its configurable AND/OR logic. This allows the relationship between the monitored inputs to be selected for the intended application. The configuration must be chosen carefully to ensure that the completed safety function meets the machine’s risk assessment and applicable safety requirements. The relay is not a substitute for a complete safety system design.

The relay features removable screw terminals to support electrical installation and maintenance. Its compact housing is approximately 22.5 mm wide, making it suitable for installation on a compatible DIN rail within an appropriately rated control enclosure. The stated enclosure protection is IP40, while the terminals have IP20 protection; therefore, the relay should be installed in a suitable enclosure and protected from environmental conditions outside its ratings.

The Allen-Bradley 440R-D22R2 is specified with a power consumption of approximately 2.5 W and dimensions of 22.5 mm wide, 119.4 mm high, and 113.6 mm deep. These characteristics help engineers assess panel space, power requirements, and mounting compatibility when planning a control cabinet.

The Guardmaster safety relay family is used in industrial applications such as factory automation, packaging machinery, conveyor systems, CNC machines, robotic work cells, and manufacturing production lines. The exact safety performance achieved depends on the complete system, including the connected safety devices, wiring, output switching components, diagnostic coverage, and validation process.

For machine builders, maintenance engineers, panel manufacturers, and automation integrators, the Allen-Bradley 440R-D22R2 provides a configurable solution for monitoring compatible safety inputs. Before purchasing, confirm the catalog number, supply voltage, input configuration, reset mode, output ratings, and required safety performance against the manufacturer’s documentation.

Allen-Bradley 440R-D22R2 _ Key Specifications

📦 What’s Included

• Allen-Bradley 440R-D22R2 Guardmaster Dual Input Safety Relay.

Please confirm the product condition, packaging, and warranty with the supplier before ordering.

Price Note: The price of the Allen-Bradley 440R-D22R2 Guardmaster Dual Input Safety Relay may fluctuate depending on supplier availability, stock levels, product condition, warranty, exchange rates, shipping costs, and applicable taxes and duties. Please contact Rewaltech Engineering for the latest price and a formal quotation. Confirm whether the unit is new, used, or refurbished before placing your order.