440R-N23114 | Allen-Bradley Compact Safety Relay for Emergency-Stop Monitoring, 24V AC/DC, 22.5 mm housing

The Allen-Bradley 440R-N23114 is a dual-channel safety relay designed to monitor emergency stop circuits and safety devices like interlocks or light curtains. It plays a critical role in ensuring personnel and machine safety by providing reliable monitoring and fail-safe shutdown in case of faults. This relay complies with Category 4 safety standards, making it suitable for high-risk applications. It guarantees that a single point of failure does not lead to loss of the safety function. The relay is typically used in systems where safety redundancy and integrity are essential.

Yes, the 440R-N23114 supports both manual and automatic reset modes, offering flexibility in application design. The reset type can be configured depending on the safety requirements of the system. Manual reset is often used where operator acknowledgment is needed after fault correction. Automatic reset can be used in less hazardous operations where reactivation without human intervention is acceptable. This dual mode enhances versatility in safety circuit design.

This relay conforms to Category 4 as per EN ISO 13849-1, the highest safety level for machine control systems. It is certified by CE, CULus, BG, and C-Tick, verifying its suitability for global use. Category 4 compliance means the system is resistant to single faults and includes diagnostics to detect potential issues. This makes it suitable for applications where human injury risk is high. The certifications ensure regulatory acceptance in multiple markets.

The relay accepts two safety inputs (typically two N.C. circuits) and a logic control (LC) input, enabling it to monitor dual-channel E-stop buttons or devices. It includes two redundant safety outputs designed to interrupt power to hazardous machine motion in the event of an emergency. These outputs are force-guided and meet requirements for safety interlocks. The configuration enhances diagnostic coverage and system fault detection. It also ensures compliance with EN ISO 13849-1 standards.

Yes, the 440R-N23114 (MSR126.1T) is currently available from Rockwell Automation and is part of their active safety relay product line. It continues to be a widely used solution in safety-critical industrial applications. Documentation, accessories, and support for integration remain available. However, for long-term planning, it is always advisable to check product lifecycle status through official Rockwell sources. There are no known end-of-life notices as of now.