Schmersal SRB402EM Safety Controller

SRB402EM is an expander module for contact expansion in Schmersal safety systems, designed to extend the safe-contact capacity of PROTECT safety controllers. It provides four safety contacts (STOP 0) and two signaling outputs, enabling expanded safe-stop interlocks and status signaling within a compact DIN-rail module. The unit carries item number 101170840 (replacement article 101175611), features a glass-fibre reinforced thermoplastic, ventilated housing, and is specified against standards including EN IEC 60204-1, EN IEC 60947-1, EN IEC 60947-5-1, EN IEC 60947-5-3, EN IEC 60947-5-5, EN IEC 61508, EN IEC 62061, and EN ISO 13849-1, with climate resilience per EN 60068-2-78. It also carries CCC and cULus certifications for broader applicability.