The present invention discloses an
electric energy monitoring and control circuit
system for each
power output port of a PDU device, including a first step-down and
voltage stabilization circuit unit, and the first step-down and
voltage stabilization circuit unit outputs a first power supply; a second step-down and
voltage stabilization circuit unit, and the second step-down and voltage stabilization circuit unit outputs a second power supply; a
microprocessor, and the
microprocessor can be electrically connected to a computer, a memory, and an external terminal device; a power supply and
digital signal isolation circuit, and the first power supply output by the first step-down and voltage stabilization circuit unit is simultaneously electrically connected to the power supply and
digital signal isolation circuit and the
microprocessor, and the second power supply output by the second step-down and voltage stabilization circuit unit is electrically connected to a
bus circuit in the power supply and
digital signal isolation circuit; a main circuit metering module, and the main circuit metering module is electrically connected to the second power supply on the power supply and digital
signal isolation circuit; a
branch circuit metering module, and the
branch circuit metering module is electrically connected to the second power supply on the power supply and digital
signal isolation circuit and the main circuit metering module.