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-TS101
C200HW-AB001
C200HW-SLK13
C200H-OC226N
C200HW-CE012
C200H-MD215
C200HX-CPU64-E
C200H-OA221
C200HX-CPU65-E
C200H-ATT51
C200HX-CPU54-ZE
C200H-ID219
C200HW-PA209R
C200HX-CPU34-ZE
C200H-OA222
C200H-OD217
C200H-ID001
C200HW-SLK24
C200HW-BC081-V1
C200HW-CE011
C200HW-DRM21-V1
C200HW-NC213-LD
C200H-CP114
C200H-TV003
C200H-TS002
C200H-CPU31
C200H-CPU02
C200HE-CPU42-ZE
C200H-B7A21
C200HW-ATT54
C200HW-PA204C
C200HW-ATT84
C200HW-BI081-V1
C200H-IA221
C200H-ID217
C200H-CN211
C200HX-CPU54-E
C200H-BC101-V2
C200H-CN131
C200H-BC051-V1
C200HW-PCU01
C200HS-CPU21
C200H-CE001
C200H-IA121
C200HE-CPU42-E
C200HS-CN422
C200H-TV103
C200HX-CPU65-ZE
C200HS-CPU21-E
C200HW-BI031