Huawei DPU40D-N06A3 - Page 28

DPU40D-N06A3, DBU20B-N12A3, and
DBU50B-N12A1 Distributed Power System
User Manual
3 Components
Issue 04 (2020-02-29)
Copyright © Huawei Technologies Co., Ltd.
22
Communications
Port
Communications
Parameter
Communications
Protocol
Function
COM_DIN
-
CAN2.0
Communicates with
a lithium battery or a
cascaded PSU.
COM_ALM
Baud rate: 9600
bit/s, 19200 bit/s,
115200 bit/s,
auto-negotiation
YDN protocol or
master/slave
protocol/ModBUS
protocol
Communicates with
upstream monitoring
equipment.
-
CAN2.0
Communicates with
a cascaded PSU.
Figure 3-3 COM_DIN port pins
Table 3-4 COM_DIN port pin definitions
Pin
Signal Name
Description
1-7
NC
NC
8
CANH
CAN data transmission and reception H
9
CANL
CAN data transmission and reception L
Figure 3-4 COM_ALM port pins
Table 3-5 COM_ALM port pin definitions
Pin
Signal Name
Description
1
ALM1+
AC outage alarm
(High resistance: alarm; low resistance: normal;
< 30 V/4 mA)
2
ALM1-