PNOZ s7.1 C 24VDC 3 n/o cascade PILZ Product ID: 751167 PNOZsigma contact expansion, cascadable, outputs: 3 N/O, UB = 24 V DCwidth 17.5 mm, plug-in spring-loaded terminal, contact block for contact expansion in connection with safety-related control blocks, additional voltage terminal for supplying further contact blocks.