描述
若PLC控制的系统需要联入工厂自动化网络，则PLC需要有通信联网功能，即要求PLC应具有连接其他PLC、上位计算机及CRT等的接口。大、中型机都有通信功能，目前大部分小型机也具有通信功能。在相同功能和相同I/O点数据的情况下，整体式比模块式价格低。但模块式具有功能扩展灵活，维修方便（换模块），容易判断故障等优点，要按实际需要选择PLC的结构形式。
57160001-ACX ABB 售后无忧 质保一年 放心选择
NEW, PARKER PRESSURE REDUCING VALVE PR800SM-20KE
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7134 NEW Parker A4A Pressure Regulator 1″
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Parker Pressure Reducing Valve DR FM3DDKN 55
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Parker PRDM2PP16SVG, Pressure Reducing Valve NEW
Parker PRDM2BB16LVM, Pressure Reducing Valve NEW
Parker PRDM2BB02LNM, Pressure Reducing Valve NEW
