PNOZsigma Safety relay (standalone). Inputs: 1-/2-channel wiring with/ without detection of shorts across contacts. Outputs: 2 N/O, 2 N/O (t = 0 - 300s), 1 semiconductor UB 24 V DC, width: 22.5 mm, plug-in terminals of screw type Monitoring E-STOP, safety gates.