CP series power distribution module is a compact plug-in structure of the conversion module, to supply voltage to the wire transmitter, while receiving the transmitter and differential pressure, pressure, liquid level ratio of 4~20mADC output signal. The AC and DC power supply, the transmission output is isolated from the host, with 1~5VDC or 4~20mADC output signal selection function and configure the transmitter power switch. Provide a power supply circuit for a primary instrument that needs field power supply, such as a pressure transmitter, and measure the current signal output of the primary instrument at the same time, and after processing such as calculation and interference suppression, transmit the output isolated single or double current/voltage signal, and improve the electrical isolation performance between the input, output and power supply. It can be used with unit combination instrument and DCS, PLC and other systems, and is widely used in oil field, chemical industry, manufacturing, electric power, metallurgy and other industries.