Huawei EPMU01 Power Monitoring Module

The power and environment monitoring unit (PMU) is the unit for monitoring thepower and the environment. The PMU provides perfect power system management,power distribution detection, and alarm report functions.

RS2321RS422 port:Communicating with the main control unit
Battery control switch:The battery control switch has two control ports ON and OFF, which areused for powering on and off the battery.Press and hold the portON for 5s to 10s until the battery is powered on.ePress and hold the port OFF for 5s to 10s until the battery is powered off

CAUTION:
You need to insert a small round bar into the hole when you operate thebattery control switch. When you hear a crack, the battery is powered on oroff.
To operate the battery control switch on the front panel of the PMU, inserta small round pole into the hole.
Power supply testport:Two power supply test holes -48 V and 0 V are available for measuringpower voltages through an ordinary multimeter.
CoM port:Connecting the external signal transfer board
Backplane port:Connecting the backplane