在CPU的一个槽内安装一块合适型号的通信板，CPU就可以增加RS232C，RS422，或RS485端口
C200H-PAR-PTC219
C200H-ID218
C200H-ATT33
C200H-AD003
C200H-ATT03
C200H-IP007
C200HW-COM01
C200H-OC221
C200HG-CPU43
C200HX-CPU44-E
C200H-BC051-V1
C200HW-PRM21
C200H-TC102
C200H-BC051-V2
C200H-IA122
C200H-OA224
C200H-ATT81
C200H-TV002
C200HW-SLK24
C200H-ID111
C200H-BAT09
C200HE-CPU32-ZE
C200HG-CPU63-ZE
C200HW-NC113
C200H-CT021
C200H-ATT02
C200HW-BI101
C200HW-ZW3AT2-EV2
C200H-OC224
C200HS-CPU31-E
C200HW-NC213
C200H-TS102
C200HW-PA204S
C200H-CN711
C200H-IA222
C200HW-MC402-E
C200H-TS101
C200H-OC223
C200H-OD215
C200H-CE001
C200H-ID501
C200H-CN111
C200HS-INT01
C200HW-COM06-EV1
C200H-PAR-MRK1031G
C200H-TV001
C200H-CPU02-E
C200H-PS211
C200H-OC224N
C200H-OC225