PNOZ s7.2 C 24VDC 4 n/o 1 n/c expand PILZ Product ID: 751177 PNOZsigma contact expansion, outputs: 4 N/O, UB 24 V DC, width 17.5 mm, plug-in spring-loaded terminals, contact blockfor contact expansion in connection with safety-related control components, mounting further contact blocks to the right is possible.