ABB SU201M-Z4 Safety Relay Module For Industrial Automation

ABB SU201M-Z4 Safety Relay Module is a compact, 1-module-wide safety relay for industrial automation designed to monitor safety circuits and trigger controlled shutdowns in response to hazard signals. Part of ABB's SU201M family, the Z4 variant carries catalog SKU 2CDS271337R0338 and is documented as 1 module wide in ABB listings, making it a space-efficient option for control panels. This module interfaces safety devices such as emergency stop switches, safety interlocks, and two-hand control units with a central control system, providing fail-safe switching to meet safety logic requirements. It is intended to be used within a broader ABB safety components ecosystem to form a complete protective function across machinery and production lines. Typical applications span machine protection on conveyors, packaging lines, and manufacturing cells, where reliable monitoring and isolation of safety circuits are critical. By combining the SU201M-Z4 with other ABB safety relays and sensors, engineers can implement robust fault detection and safe-state behavior in accordance with industrial safety practices. With ABB’s lineage of safety products, this module supports quick integration into existing ABB safety architectures and helps streamline cabinet layouts with its single-module width.