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4-20mA RS485 Voltage and Current Analog Data Collector ADC Modbus RTU 03 06 Function Code N4aia04, Find Details and Price about RS485 Voltage and Current Analog Data Collector 4-20mA RS485 4CH N4aia04 ADC Modbus from 4-20mA RS485 Voltage and Current Analog Data Collector ADC Modbus RTU 03 06 Function Code N4aia04 - Shenzhen Tianhehuijin Tech Ltd