Allen Bradley 440R-D22R2 Guardmaster Dual Input Safety Relay

Product Overview

The Allen Bradley 440R-D22R2 serves as a high-performance Dual Input (DI) Safety Relay within the Guardmaster family. This module consolidates multiple safety functions into a single 22.5mm housing, managing two dual-channel universal inputs effectively. As a 100% Brand New original component, it facilitates advanced logic configurations including AND/OR voting via a rotary switch. It interfaces seamlessly with E-stops, light curtains, and safety gates to provide deterministic protection for industrial machinery.

Technical Specifications

The 440R-D22R2 operates on a standard 24V DC architecture and supports versatile I/O interfacing.

Engineering Advantages

• Optimized Panel Density: The 440R-D22R2 replaces two standard safety relays by managing two independent safety circuits simultaneously. This reduces DIN rail footprint and simplifies electrical cabinet design.

• Flexible Logic Integration: The onboard rotary switch allows engineers to toggle between AND/OR logic. This enables complex safety zoning, such as requiring two independent light curtains to be clear before allowing a machine restart.

• Single Wire Safety (SWS) Compatibility: Terminals X1 and X2 support Single Wire Safety technology. This allows for easy expansion and linking between multiple Guardmaster relays using a single wire, drastically reducing field wiring labor and potential points of failure.

• Simplified Maintenance: Removable terminal blocks permit rapid hardware replacement without disturbing the existing wire loom. This minimizes Mean Time to Repair (MTTR) during critical maintenance windows.

• OSSD Interfacing: The relay directly accepts Output Signal Switching Device (OSSD) signals from sensors like laser scanners and light curtains, eliminating the need for interposing hardware.

FAQs

• Can I use the 440R-D22R2 to monitor two separate E-stop buttons?

  Yes. The module features two universal dual-channel inputs. You can configure them to monitor two E-stops independently or link them via AND/OR logic depending on your safety protocol.

• What is the purpose of the Solid State Auxiliary Output?

  The 1 N.C. auxiliary output provides non-safety feedback to a PLC or HMI. This allows the control system to monitor the relay status for diagnostic purposes without utilizing the primary safety contacts.

• How do I change the reset mode from Automatic to Manual Monitored?

  You select the reset mode through the configuration settings on the front of the unit. Manual Monitored reset provides a higher level of safety by requiring a specific transition (off-to-on-to-off) to prevent unintended restarts.

• Is this a genuine, factory-sealed unit?

  Absolutely. We supply only 100% Brand New original Allen Bradley hardware. Each unit arrives in its original factory packaging with a verifiable batch code.