IC695CMM004 RX3i serial communications Module. Four isolated RS-232/485 port. Supports Serial Read/Write and Modbus Master/Slave. Requires Unversal Backplane.

　　进程操控是指对温度、压力、流量等接连改变的模拟量的闭环操控。PLC经过模拟量I/O模块，完成模拟量(Analog)和数字量(Digital)之间的A/D变换与D/A变换，并对模拟量实行闭环PID(份额-积分-微分)操控。现代的大中型PLC通常都有PID闭环操控功用，这一功用可以用PID子程序或专用的PID模块来完成。其PID闭环操控功用已经广泛地应用于塑料揉捏成形机、加热炉、热处理炉、锅炉等设备，以及轻工、化工、机械、冶金、电力、建材等职业。

　　①Allen-Bradley(美国AB)系列产品 等周边产品

　　②Schneider(施耐德电气)系列产品 等周边产品

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　　⑤SIEMENS (西门子)系列产品 等周边产品

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