Product Details
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.
| Feature | Specification |
| Relay Model | Guardmaster Dual Input (DI) |
| Safety Inputs | 2 Dual Channel Universal Inputs |
| X1 Input Terminal | Single Wire Safety or OSSD (50mA) |
| X2 Output Terminal | Single Wire Safety or OSSD (50mA) |
| Safety Outputs | 2 N.O. (Normally Open) |
| Auxiliary Outputs | 1 N.C. (Normally Closed) Solid State |
| Logic Configuration | Rotary Switch (AND / OR Logic) |
| Power Supply | 24V DC |
| Terminals | Removable / Plug-in |
| Reset Modes | Automatic/Manual or Manual Monitored |
Engineering Advantages
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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.
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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.
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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.
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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.
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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
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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.
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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.
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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.
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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.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
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Choosing the Right Controller: PLC vs. Motion Controller in Industrial Automation
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Mastering PLC Power Supply Architectures and Operating Voltages
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