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
C200HX-CPU44-ZE
C200H-OC224
C200H-CN311
C200HW-SLK13
C200H-DIN01
C200H-OD211
C200H-RT201
C200HW-NC413
C200H-MC221
C200H-B7A21
C200HS-CPU01-E
C200H-MP831
C200HW-CE002
C200HW-COM01
C200H-CPU03-E
C200HW-BI081-V1
C200H-MR832
C200HW-BC031
C200HW-COM05-V1
C200H-TC102
C200H-TS002
C200HS-CPU21-E
C200H-PID02
C200HE-CPU11-ZE
C200H-IA122
C200HW-ATT53
C200H-CN422
C200HW-BI051
C200H-IP007
C200HW-ME08K
C200H-AD003
C200H-DAC01
C200HX-CPU65-ZE
C200H-CN222
C200HW-BI031
C200H-BC051-V2
C200HG-CPU43
C200H-NC111
C200H-CE001
C200H-OD212
C200HS-CN422
C200HS-CPU21
C200H-ATT31
C200HW-PA209R
C200H-CN425
C200H-ID001
C200H-TC002
C200H-TV101
C200HE-CPU32-E
C200HX-CPU34-E