描述
PLC系统的通信网络中，上级的网络通信速率应大于1Mbps，通信负荷不大于60%。PLC系统的通信网络主要形式有下列几种形式：1）PC为主站，多台同型号PLC为从站，组成简易PLC网络；2）1台PLC为主站，其他同型号PLC为从站，构成主从式PLC网络；3）PLC网络通过特定网络接口连接到大型DCS中作为DCS的子网；4）专用PLC网络（各厂商的专用PLC通信网络）。
EMS Electronic Modular Systems MVME V68-330 CPU Board
Digital CPU Board, #54-23534-02
COMPAQ 136812-001 PROLIANT 4/50 CPU BOARD
DEC 54-23600-02 DEC POLARIS CPU BOARD
DEC 54-30362-01 ES40 6/667MHZ CPU BOARD
DEC KN610-BA ES40 6/667MHZ CPU BOARD
RTD CMi386/486 PC104 PC/104 CPU Board
NEC Interconnect CPU Board Exp5800 DG7DXV 133-659436
Intel CPU Board Assy Slot 2 753356-300
Symbol Terminal VRC 8900 CPU Board PCBS148
Motorola 01-W3632F Peripheral CPCI/PMC CPU Board/Card
Dell Poweredge 6650 CPU Board + 2 x 2Ghz 2M CPU’s
Vector Graphics S-100 CPU Board w/AMD P8080AB Processor
GE CASI RUSCO 100124002 MICRO/5/PX CPU BOARD NEW
