Allen-Bradley 440C-CR30-22BBB Guardmaster Safety Relay

The Allen-Bradley Guardmaster 440C-CR30-22BBB is a software-configurable safety relay (CR30) that lets you implement customized, safety-rated logic for guard circuits in a compact DIN-rail package. Catalog Number 440C-CR30-22BBB exposes 22 embedded safety I/O, two plug-in slots for expansion, and runs on 24.0 V DC power. It includes an embedded serial port and a USB programming port to enable configuration and diagnostics; configuration is performed with the Allen-Bradley Connected Components Workbench (CCW) software. The CR30 module delivers SIL 3 and PL e safety performance, supporting safety inputs and outputs in a centralized control unit suitable for small-to-mid-scale machines. Its configurable logic and status reporting allow you to tailor interlock, emergency-stop, and guarding circuits to your specific application while maintaining traceable safety compliance. This Guardmaster device integrates with other Guardmaster safety components and lets you deploy safety functions without a dedicated safety PLC, making it a flexible option for implementing fail-safe control in production lines, machines, and robotic cells.