Compact Switch Module CSM 1277 for connecting SIMATIC S7-1200 and up to 3 further nodes to Industrial Ethernet with 10/100 Mbit/s unmanaged switch, 4 - 6GK72771AA100AA0
4 Port Gigabit Switch | Ethernet VLAN Switch Module
Compact switch module csm 1277 s7 1200 | PDF
6GK7177-1FA10-0AA0 | Siemens Compact Switch Module | Distrelec International