PNOZ e4.1p C 24VDC 2so 784180 Safety relays in the PNOZelog product range monitor pressure-sensitive mats. Safety relay (standalone), inputs: 2-channel wiring with detection of shorts across contacts, outputs: 2 safety outputs + 1 auxiliary output of SC type, automatic/monitored start, UB = 24 V DC, width: 22.5 mm, plug-in spring-loaded terminals, connection between several devices, safety gate monitor.