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-OC222
C200H-DA001
C200HW-PRM21
C200HW-ATTA3
C200HW-BI031
C200HX-CPU85-ZE
C200H-TC102
C200HE-CPU11-E
C200HX-CPU65-E
C200H-B7A01
C200H-MD215
C200H-RT201
C200H-CN311
C200HW-SLK13
C200H-TV103
C200HW-SLK23
C200H-PAR-MRK1031G
C200HW-ME04K
C200H-ME431
C200HW-ZW3AT2-EV2
C200H-TV102
C200HS-MP16K
C200H-KS01G
C200H-BC101-V2
C200HW-SLK14
C200H-CN225
C200H-PID03
C200HX-CPU65-ZE
C200H-ATTA1
C200H-OC221
C200H-CPU02
C200HW-ME16K
C200H-ID501
C200HG-CPU63
C200H-RT202
C200HS-CPU03
C200H-RT201-C
C200H-ID217
C200H-TC103
C200H-ATT51
C200H-OD217
C200HE-CPU42-ZE
C200HS-CPU21
C200H-MD115
C200H-PS221
C200H-BC051-V1
C200HW-ME64K
C200H-ASC31
C200HW-BI101-V1
C200H-CPU11