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-ZE
C200H-ATT81
C200H-CT001
C200H-ETL01-E
C200H-ATT03
C200H-ID001
C200H-PS211
C200H-CPU31
C200HS-CN222
C200H-APS03
C200HG-CPU63
C200H-KS01G
C200H-OA222
C200H-ID111
C200HW-AB001
C200H-TM001
C200HE-CPU42-E
C200HX-CPU44-E
C200H-TC101
C200H-RM201
C200HW-PD024
C200H-BC051-V2
C200HX-CPU64-E
C200HW-PD025
C200H-ASC02
C200H-IDS01-V1
C200H-MR832
C200H-ATTA3
C200H-MP831
C200H-OC224N
C200H-CN711
C200HW-ASCST-CV2
C200H-BP002
C200H-TV103
C200H-ID218
C200H-CPU23
C200H-ATTA1
C200HW-COM04-EV1
C200H-OA222V
C200HW-PA204R
C200HW-CE001
C200H-ID219
C200HG-CPU63-E
C200HW-COM06-V1
C200H-TC102
C200H-MC221
C200H-OC226N
C200H-NC111
C200H-NC211
C200H-ATT51