可编程逻辑控制器系统的通信网络中，上级的网络通信速率应大于1Mbps，通信负荷不大于60%。可编程逻辑控制器系统的通信网络主要形式有下列几种形式：
1）、PC为主站，多台同型号可编程逻辑控制器为从站，组成简易可编程逻辑控制器网络；
2）、1台可编程逻辑控制器为主站，其他同型号可编程逻辑控制器为从站，构成主从式可编程逻辑控制器网络；
3）、可编程逻辑控制器网络通过特定网络接口连接到大型DCS中作为DCS的子网；
4）、专用可编程逻辑控制器网络（各厂商的专用可编程逻辑控制器通信网络）。
为减轻CPU通信任务，根据网络组成的实际需要，应选择具有不同通信功能的（如点对点、现场总线、）通信处理器。
ALLEN BRADLEY INDUCTIVE PROXIMITY SENSOR 871C-C5S18
ALLEN BRADLEY ILLUMINATED SELECTOR SWITCH 800T-24HR2KB6AX 2 POSITION MAINTAI
ALLEN BRADLEY ILLUMINATED SELECTOR SWITCH 800FM-LSB33MQ3GX20
ALLEN BRADLEY ILLUMINATED PUSH BUTTON NO LENS COVER SER N 800T-NX949
ALLEN BRADLEY GUARD MASTER FERROGARD SAFETY SWITCH 250VAC 2A EN 1088
ALLEN BRADLEY FERROGARD GAURDMASTER 230V FRS-6 44ON-G02095 B
Allen Bradley Data Highway Station Connector - 1770-SC
Allen Bradley ControlNet Coax Y Tap - 1786TPYR Series C
Allen Bradley Cable 2090-CPWM6DF-16AA07
Allen Bradley Bulletin 1494F 30A Disconnect Switch 1494F-NF30 NSNP
ALLEN BRADLEY AC LIGHTING CONTACTOR 500L-A0D93 SERIES B
ALLEN BRADLEY AC DRIVE MOTOR TERMINATOR MODEL 1204-TFA1
ALLEN BRADLEY AB ROCKWELL TC-RPSC04 REDUNDANT POWER SUPPLY CABLE
ALLEN BRADLEY AB OILTIGHT LIMIT SWITCH 802T-CD 3/4" NPT TYPE 13 SER C 802TCD
Allen Bradley AB Bulletin 1494V Disconnect Operating Handle 1494V-H2
ALLEN BRADLEY SERVO CABLE D377728
ALLEN BRADLEY 872C-N20CP30-D4 PROXIMITY SENSOR 872CN20CP30D4
ALLEN BRADLEY 871Z-DW5NP18-D4 PROXIMITY SENSOR SER. A 871ZDW5NP18D4
Allen Bradley 871TM-BH8N18-N3 Proximity Sensor *FREE SHIPPING*
ALLEN BRADLEY 871T-G4B12 PROXIMITY SENSOR SER.A 871TG4B12
ALLEN BRADLEY 871T R8B18 871T-R8B18
Allen Bradley 855E-24TL4 /A Control Tower Stack Light 24V AC/DC Red Socket
ALLEN BRADLEY 816-BOV4 SERIES K OVERLOAD RELAY
ALLEN BRADLEY 802T-HP LIMIT SWITCH BODY SER. J 802THP
ALLEN BRADLEY 802T-CW OILTIGHT LIMIT SWITCH Series C 802T
Allen Bradley 802T-AP Plug-in Oiltight Limit Switch Series J NIB
Allen Bradley 802M-H2J1NF Limit Switch - 802M-XJ1NF Body with 802M-H2X Head
ALLEN BRADLEY 802M-AZJ7 SER. A LIMIT SWITCH 802MAZJ7
Allen Bradley 802G-GP1 Gravity Return Limit Switch
