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-OC221
C200H-TV101
C200HG-CPU43-ZE
C200H-LK401
C200H-CPU23
C200HW-BC101
C200HW-ATTA3
C200H-SP001
C200HW-ATT33
C200HX-CPU44-E
C200HW-AB001
C200H-ME431
C200H-ATT83
C200H-AD003
C200H-IA222
C200H-PID03
C200HS-CPU03
C200H-TV003
C200HW-CE001
C200H-OD212
C200H-TC003
C200H-FZ001
C200H-CN225
C200HW-DRM21-V1
C200HS-CN222
C200H-PID02
C200H-BP002
C200HX-CPU34-E
C200H-OD214
C200HW-PCU01
C200H-CN521
C200H-OA222
C200H-BP001
C200H-PAR-PTC219
C200H-CPU03-E
C200H-AD001
C200HS-MP16K
C200HG-CPU63
C200H-LK101-PV1
C200H-MR833
C200HW-COM05-EV1
C200H-B7A02
C200H-OD411
C200HW-ATT53
C200H-OC226N
C200H-CN223
C200H-OD218
C200H-CN425
C200HW-MC402-E
C200HS-INT01