RS485 Modbus RTU PLC IO Expanding Board 8DO-4DI-8AI 4DO-2DI-3AI 4-20MA 0-10V Analog Current Voltage Collector NPN/PNP DIO

RS485 Modbus RTU PLC IO Expanding Board 8DO-4DI-8AI 4DO-2DI-3AI 4-20MA 0-10V Analog Current Voltage Collector NPN/PNP DIO

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