SIMATIC S7-300 Communications Modules
6AG1 341-1CH02-7AE0
CP 341 Ext temperature range RS 232C interface (V.24) RS 422/485 (X.27) interface
6AG1 343-1CX10-2XE0
SIPLUS CP 343-1 Lean -25 ... +60 °C, TCP/IP, UDP, Multicast, S7 communication, open communication (SEND/RECEIVE), FETCH/WRITE, PROFINET IO device, integral 2-port switch ERTEC
6AG1 343-1CX10-4XE0
SIPLUS CP 343-1 Lean 0 ... +60 °C, TCP/IP, UDP, Multicast, S7 communication, open communication (SEND/RECEIVE), FETCH/WRITE, PROFINET IO device, integral 2-port switch ERTEC
6GK7 377-1AA00-0AA0
CSM 377 unmanaged switch with integral PROFINET interface or with an Industrial Ethernet