PNOZ e3vp 300/24VDC 1so 1so t 774138 Safety relays in the PNOZelog product range monitor emergency stop, safety gates or light grids. Safety relay (standalone), inputs: 2-channel wiring with/without detection of shorts across contacts, (PSEN 2.1p/2.2p),outputs: 2 safety outputs + 1 auxiliary output of SC type, delayed, automatic/monitored start, UB = 24 V DC, width: 22.5 mm, plug-in terminals of screw type, connection between several devices, safety gate monitor.