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
C200HG-CPU53-E
C200H-BC051-V1
C200HW-BI051
C200H-OD216
C200HS-ME16K
C200HS-CPU01-E
C200H-OC224
C200H-ID215
C200HW-ATT54
C200H-MAD01
C200HW-SLK23
C200HS-CPU21-E
C200H-CN225
C200H-KS01I
C200H-B7A22
C200H-ASC02
C200H-PAR-EPTC210B
C200H-BP001
C200HW-COM05-V1
C200H-ATT03
C200HW-ATT53
C200H-TM001
C200HW-COM03-V1
C200HW-BI101
C200HW-NC213-LD
C200HW-PA204R
C200HX-CPU54-E
C200HW-PRM21
C200HW-PD024
C200HW-BC081-V1
C200H-ATT81
C200H-CN425
C200HW-PA209R
C200HG-CPU33-ZE
C200HW-ATTA2
C200H-B7A02
C200H-OA221
C200HW-ATT34
C200H-OD218
C200H-ATT83
C200HS-INT01
C200H-COV11
C200HX-CPU44-ZE
C200H-ME832
C200H-ATT02
C200H-ID219
C200HW-PA204
C200H-ID001
C200HW-COM04-EV1
C200H-OD215