Contact expansion, inputs: 1-channel wiring, outputs: 4 N/O t-d, UB = 24 V DC, width: 45 mm, screw terminals integrated, delay-onde-energisation contact block for contact expansion in connection with safety-related control components, delay time can be set in 5 levels from 4 -8 s. http://www.pilz.com Safety solutions provider since 2011, We offer Pilz