描述
整体式PLC的每一个I／O点的平均价格比模块式的便宜，且体积相对较小，所以一般用于系统工艺过程较为固定的小型控制系统中；而模块式PLC的功能扩展灵活方便，I／O点数量、输入点数与输出点数的比例、I／O模块的种类等方面，选择余地较大。维修时只要更换模块，判断故障的范围也很方便。因此，模块式PLC一般适用于较复杂系统和环境差（维修量大）的场合。
1745-LP153/B Allen Bradley SLC 150 1745LP153 N837
One-day shipping available
ALLEN BRADLEY SLC150 PROGRAMMABLE CONTROLLER 1745-LP154
One-day shipping available
Allen Bradley 1745-R1 Relay Board Processor Unit *NIB*
NS** ALLEN-BRADLEY 1745-E153 SLC 150 EXPANSION UNIT
One-day shipping available
Allen-Bradley 1745-PT1 with cable
Expedited shipping available
Allen-Bradley SLC100 Replacement Relay Board 1745-R1 !!
