PNOZsigma safety relay (standalone), inputs: 1/2-channel wiring, outputs: 3 N/O, 1 N/C, (t = 0.04 – 300 s), UB = 24 V DC, width: 17.5 mm plug-in screw terminals, contact block and timer relay for contact expansion in connection with safety-related control components or for the process of a safe timer function(energising, fallback, pulsing).