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-CPU03-E
C200H-PS221-C
C200H-DIN01
C200H-ATT83
C200H-TS102
C200H-CN221
C200H-NC112
C200H-B7A22
C200HW-ME04K
C200HW-COM04-EV1
C200H-FZ001
C200HW-ASCST-CV2
C200H-OC224
C200HW-BC031
C200HS-CPU01-E
C200H-MD115
C200HX-CPU44-ZE
C200H-KS01E
C200H-BC031-V2
C200H-NC413
C200H-OA224
C200HW-ME08K
C200H-CN211
C200HW-NC213
C200HW-COM02-V1
C200H-IDS01-V1
C200H-OC224N
C200HW-BI031
C200H-MP831
C200HX-CPU65-ZE
C200HW-PCU01
C200HX-CPU64-ZE
C200H-IM211
C200HW-COM06-EV1
C200H-SP001
C200HW-ATT82
C200H-PID02
C200HW-NC413
C200HS-ME16K
C200HX-CPU54-E
C200H-OD21A
C200H-ID216
C200H-CN111
C200H-CN002
C200H-OC222N
C200HW-CE002
C200H-TS101
C200H-BC081-V1
C200H-CN311
C200H-OA222