MSR142RTP

Overview of Allen Bradley MSR142RTP

The Allen Bradley MSR142RTP is a monitoring safety relay designed for reliable control and protection in industrial automation systems. Part of the Minotaur and Guardmaster lines by Rockwell Automation, this single-function safety relay is engineered to meet high safety standards, including ISO 13849-1, IEC 62061, and IEC 61508. It supports multiple input wiring configurations—single or double normally closed, PNP light curtain, or safety mat connections—ensuring flexibility for a range of safety applications.

Built for maximum uptime, the MSR142RTP provides cross-fault monitoring for added diagnostic capability and features both automatic and monitored manual reset options. Its robust construction and clear LED indicators simplify troubleshooting and maintenance. This safety relay is certified for Safety Integrity Level (SIL) 3 and Performance Level e (PL e), Category 4, making it suitable for demanding environments where personnel and equipment protection are critical.

Key Features of Allen Bradley MSR142RTP

• Meets ISO 13849-1 (PLe, Cat. 4), IEC 62061 (SIL 3), and IEC 61508 standards for functional safety
• Supports multiple safety input types: single and double normally closed, PNP light curtain, and four-wire safety mats
• Cross-fault monitoring for improved diagnostic coverage
• Seven normally open electromechanical safety-rated outputs and four normally closed auxiliary outputs
• Two integrated solid-state auxiliary outputs for status indication
• Removable terminals for easy installation and maintenance
• LED indicators for power, start, input, and output status
• Flexible reset options: automatic/manual or monitored manual
• High mechanical life: up to 10,000,000 cycles
• Wide power supply range: 24V AC/DC, 115V AC, 230V AC

Technical Specs of Allen Bradley MSR142RTP

Applications / Use Case

The Allen Bradley MSR142RTP is designed for industrial safety applications, including emergency stop functions, light curtain monitoring, and safety mat control. It is commonly used in manufacturing, material handling, and automated machinery where personnel must be protected from hazardous movement. Its ability to detect cross-faults across multiple input channels ensures system integrity, while the flexible reset options allow quick recovery after a safety event.

Typical use cases include guarding access to robotic cells, press brakes, and conveyor systems. The MSR142RTP is also suitable for integration into larger safety systems, providing reliable signals to PLCs and other control devices. Its high diagnostic coverage and redundant contact structure make it a robust choice for mission-critical safety applications.

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