PNOZ s4.1 C 24VDC 3 n/o 1 n/c 751124 PNOZsigma safety relay (standalone), inputs: 1/2-channel wiring with/without detection of shorts across contacts, outputs: 3 N/O,1 N/C,, UB = 24 V DC, width: 22.5 mm, plug-in spring-loaded terminals, monitoringof E-STOP, safety gates, furnaces in accordance with EN 50156-1.