Overview
The Allen-Bradley 440R-D23025 is a Guardmaster monitoring safety relay engineered for use in safety-critical circuits requiring verified machine control. As part of Rockwell Automation’s Guardmaster family, this relay provides dual-channel monitoring and certified safety-rated outputs for industrial applications including guard interlocks, emergency stop (E-stop) circuits, and machine start/stop control.
Key Features
- Dual safety input channels for redundant monitoring
- Certified safety-rated outputs (typically N.O./N.C. relay contacts)
- Status indication LEDs for system diagnostics
- DIN rail mountable design for compact panel integration
- Manual/automatic reset configuration options
- Robust design for harsh industrial environments
Technical Specifications
This 440R-D series monitoring relay follows Guardmaster design standards. For exact voltage ratings, output contact ratings, and response times, refer to the official Rockwell Automation datasheet (Bulletin 440R-SG001) or contact an authorized distributor.
Typical Applications
- Safety-rated machine guard interlocks
- Emergency stop button circuits
- Dual-channel safety input monitoring
- Machinery access control and personnel safety
- Safety valve and brake control circuits
Compatibility & Replacements
Compatible With
- Allen-Bradley PLC systems (CompactLogix, ControlLogix)
- Rockwell Automation safety solutions and Guardmaster ecosystem
- Standard industrial 24 VDC control circuits
- DIN rail mounting systems (35 mm)
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. The 440R-D23025 may be compatible with earlier Guardmaster D-series models, but direct replacement should be confirmed against your equipment documentation.
Works With
- Studio 5000 Logix Designer (safety-rated programs)
- Rockwell Automation GuardLink safety system
- Standard relay wiring and ladder logic diagrams
- IEC 61508 and IEC 61511 safety standards compliance
