Schmersal SRB-E-402ST Safety Relay Module Industrial

Schmersal SRB-E-402ST is a multi-function safety monitoring module that performs double-evaluation safety monitoring for guarding and control circuits, providing two safety contacts and two safety outputs for reliable emergency-stop functionality. It supports 2 x STOP 0, 2 x 1- or 2-channel control, and ISO 13851-compliant two-hand monitoring, with Start/Auto-start inputs and integrated diagnostics including wire-breakage and cross-circuit detection, automatic reset, and earth-connection detection. Housed in a glass-fibre reinforced thermoplastic, ventilated enclosure (approx. 190 g) and designed for 24 V DC operation (DC-12/24 VDC) with up to 2 A per channel, it aligns with EN IEC 60204-1, EN IEC 60947-1/5, EN ISO 13849-1, and EN IEC 61508/62061 standards, delivering Category 4 safety performance and high diagnostic coverage for industrial safety applications.