COMPACT SWITCH MODULE CSM 1277 CONNECTION SIMATIC S7-1200 AND UP TO 3 FURTHER IND. ETHERNET USERS WITH 10/100 MBIT/S UNMANAGED SWITCH, 4 RJ45 PORTS, EXT. 24V DC POWER SUPPLY, LED DIAGNOSTICS, S7-1200 MODULE INCL. ELECTRONIC MANUAL ON CDHs Code : 85176200