Overview
The Allen-Bradley 440R-C23139 Series B is a single-function Guardmaster Safety Relay designed to meet functional safety standards including ISO 13849-1 and IEC 62061. Built on the proven Minotaur platform, this dual-channel safety relay monitors emergency stop circuits and integrates with light curtain and safety mat systems for comprehensive machine protection. The compact 45mm DIN rail design simplifies installation in control panels while providing industrial-grade reliability.
Key Features
- Dual-channel input monitoring with automatic fault detection for redundancy and safety integrity
- Flexible input wiring: configurable for 1 N/C, 2 N/C, light curtain (2 PNP), or four-wire safety mat connections
- 24V AC/DC supply with removable screw terminals for quick field replacement and maintenance
- 3 safety output contacts (N.O.) and 2 auxiliary contacts (N.C.) for multi-circuit control
- Manual or automatic/manual monitored reset modes to match application requirements
- Compact 45mm housing width designed for space-constrained control cabinets
Technical Specifications
- Supply Voltage: 24V AC/DC
- Number of Channels: 2 (dual-channel input monitoring)
- Safety Outputs: 3 N.O. contacts at 2.5A per EN 60947-5-5
- Auxiliary Contacts: 2 N.C. for remote monitoring
- 2 PNP solid-state outputs available
- Mounting: DIN rail, 45mm housing width
- Terminal Type: Removable screw terminals
- Safety Category: ISO 13849-1 Category 4
- Safety Integrity Level (SIL): IEC 61508 SIL 3
- Performance Level (PL): ISO 13849-1 PLe
- Functional Input Types: Light beam/curtain, safety mat/edge, emergency stop
- Reset Method: Automatic, manual, or monitored
- Certifications: BG, C-Tick, CE, CULus
- Dimensions: 99mm (W) × 114.5mm (L) × 45mm (D)
- Weight: 0.70 lbs
Typical Applications
- Emergency stop circuit monitoring and control in manufacturing equipment
- Light curtain safety system integration for personnel detection
- Safety mat and edge sensor monitoring on presses and automated machinery
- Guard door interlocking systems requiring dual-channel safety logic
- Machinery compliance with OSHA and ISO 13849-1 safety standards
Compatibility & Replacements
Compatible With
- Allen-Bradley CompactLogix and ControlLogix safety controllers via hardwired inputs
- Rockwell Automation safety-rated systems and control architectures
- Light curtain sensors (2 PNP configuration)
- Safety mats and edge sensors (4-wire safety mat input)
- Emergency stop (E-stop) circuits and monitoring systems
Replaces / Drop-In Replacement For
- Earlier-generation Guardmaster single-input safety relays when upgrading to dual-channel architecture
- Minotaur MSR131RTP series relays from previous product generations
- Verify compatibility with your control system integrator before ordering to confirm pin configuration and wiring requirements match your existing installation.
Works With
- Guardmaster safety sensors (light curtains, safety mats, E-stop buttons)
- EtherNet/IP via optional Guardmaster 440R-ENETR network interface for diagnostics
- GuardLink enabled smart safety devices for status monitoring
- Standard industrial safety communication protocols and wired hardwired architectures
