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-BC031-V2
C200H-CN311
C200H-CPU31
C200HX-CPU44-E
C200HW-ATT52
C200HS-CPU31-E
C200H-OC221
C200H-RM201
C200H-ATT81
C200H-ATT02
C200H-CPU22
C200H-ME831
C200H-BP001
C200H-MR431
C200H-ID501
C200HW-NC213-LD
C200HW-DRT21
C200H-NC111
C200H-OD212
C200HW-SRM21-V1
C200HS-CPU01
C200HW-PA204C
C200H-CN002
C200HW-NC413
C200H-CN223
C200H-OD215
C200HG-CPU43-ZE
C200H-DIN01
C200H-DA004
C200H-OD218
C200H-BC101-V2
C200H-ATT01
C200H-COV02
C200H-MR833
C200H-LK201-V1
C200H-OC222
C200H-RT002-P
C200H-B7A22
C200HW-BC081-V1
C200H-DA003
C200HW-ATTA3
C200H-ID215
C200H-CN425
C200H-TC103
C200HS-ME16K
C200HW-COM05-V1
C200H-MD501
C200HW-CE012
C200H-PID01
C200H-TL001