Siemens 3RK1105-1BG04-2CA0 Safety Monitor

Siemens 3RK1105-1BG04-2CA0 is an ASIsafe extended Safety monitor that supervises two enabling circuits in AS-Interface safety networks, providing dependable fail-safe monitoring for safety-critical automation tasks. With monitor type 4, version 3, it features a safe output relay and a rapid response time up to 40 ms, enabling quick fault detection and safe shutdown in emergencies. Rated IP20, this device is designed for industrial environments and can be used to achieve safety performance levels up to Cat 4 (EN ISO 13849-1) and PL E, as well as SIL 3 (IEC 61508), making it suitable for high-integrity safety applications. As part of Siemens' AS-i safety monitor family, the 3RK1105-1BG04-2CA0 is commonly deployed to supervise dual-channel safety circuits such as E-stop, safety gates, and other AS-i safety devices, providing two enabling circuits and reliable diagnostics in a compact package.