Analog Output Module

plc module is normally used to drive the analog output voltage analog actuator (e.g., a proportional control valve) and a current loop drive actuators and various instruments. Each board depending on the type of output, typically supports multiple channels. The output channels can be isolated individually or grouped isolation.

 In the above diagram, we give a basic serial architecture, using I2C or SPI serial bus, the on-board processor through the isolator serial control information sent to the specified channel DAC, converted to output module plc. If you need to isolate each output separately, you will need to provide a way for each channel output DAC; If you allow grouping isolation, DAC subsequent distributor can keep hold capacitor DAC output until the next refresh. After the DAC, there are usually additional calibration circuit and an output buffer for fine tuning signal to provide the necessary voltage or current drive.