Huawei DPU40D-N06A3 - Lithium Battery (DBU20 B-N12 A3;DBU50 B-N12 A1)

DPU40D-N06A3, DBU20B-N12A3, and
DBU50B-N12A1 Distributed Power System
User Manual
3 Components
Issue 04 (2020-02-29)
Copyright © Huawei Technologies Co., Ltd.
23
Pin
Signal Name
Description
3
ALM2+
A PSU is faulty
4
ALM2-
5
ALM3+
A Lithium battery is faulty
6
ALM3-
7
RS485_TX+
Northbound transmits data over RS485 positive
8
RS485_TX-
Northbound transmits data over RS485 negative
9
RS485_RX+
Northbound receives data over RS485 positive
10
RS485_RX-
Northbound receives data over RS485 negative
11
ALM4+
A PSU or a lithium battery generates a
recoverable alarm
12
ALM4-
13
Reserved
Reserved
14
CANH
CAN data transmission and reception H
15
CANL
CAN data transmission and reception L
3.2 Lithium Battery (DBU20B-N12A3/DBU50B-N12A1)
Functions
The lithium battery supplies backup power to communications equipment when the PSU has
no power input, thereby ensuring reliable power supply for service operation.