Huawei Olt Ma5608t Power Board H801mpwd Hardware Description

H801MPWD Connection Power Board Description

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H801MPWD Board Contents 8.11.2 H801MPWD Board

8.11.2 H801MPWD Board The H801MPWD board is an AC power board, consisting of an AC power unit and a monitoring unit. The board supplies power to the device and supports the lead-acid battery for power backup. The AC power unit provides overcurrent protection, output overvoltage protection, short circuit protection, and over-temperature protection. The monitoring unit provides comprehensive management for the power system and storage battery, and also provides certain environment monitoring functions.

Feature and Specifications The H801MPWD board supports the following functions and specifications: 

Input AC voltage: -100 V to -240 V



Input AC frequency: 50 Hz to 60 Hz



Single-phase three-wire AC power input

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Battery port, a 3.3 V terminal socket, supporting DC input power



Lead-acid battery input, reverse polarity protection, and fuse protection



Output DC power voltage: -48 V (adjustable from -42 V to -57.6 V)



Rated output power: 400 W



Alarm monitoring

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Enabling and disabling of the rectifier module; equalized and float charging for the rectifier module



Battery low voltage disconnection; charge and discharge management of storage batteries

Parameters Please refer to "Power Consumption and Maximum Frame Size of Boards".

Working Principle Figure 1 Working principle of the H801MPWD board

The basic working principle of the H801MPWD board is as follows: 

AC input power is supplied to the board. After AC/DC conversion, the power is supplied to the system backplane at -48 V (adjustable).



The board supports battery input. The monitoring unit manages the charging and discharging of batteries.



The board communicates with the system through the backplane, reporting board hardware and electronic label information to the backplane.



The board supports communication with the monitoring unit through the 485 protocol to adjust voltage and current and report alarm information.



The board supplies 3.3 V power from the system to the monitoring unit.



The monitoring unit manages lead-acid batteries.



The optical coupler implements the battery low voltage disconnection function.



The board provides power distribution checking and alarm reporting functions.

Front Panel Ports

Indicator Indicator

AC IN

DC OUT

BAT

Name

AC input indicator

DC output indicator

Status

Meaning

Green: on

Indicates that the AC input power is normal

Off

Indicates that the AC input power is abnormal

Green: on

Indicates that the DC output power is normal

Off

Indicates that the DC output power is abnormal

Power input Green: on

Indicates that the relay is

Indicator

Name

Status

indicator

PMU

Running status indicator

Meaning

picked up Off

Indicates that the relay drops out

Green: blinks every 0.25s

Indicates that program loading is in progress

Green: blinks every 1s Indicates that the board runs normally Red: blinks

Indicating that the board is starting up

Red: on

Indicates that a critical alarm is reported

Orange: blinks

Indicates that a minor alarm (such as the high temperature alarm) is reported

Parent topic: Power Board (MPW)