Huawei MTS9300A User Manual page 45

MTS9300A Telecom Power (Ooredoo, Indonesia,
MTS9304A-HD2002)
User Manual
Table 3-19 Pin definitions of communications ports
RJ45 Pin
1
2
3
4
5
6
7
8
DO1 and DO2 Ports
Table 3-20 DO1 and DO2 port definitions
Silk
Screen
DO1
Issue 06 (2021-10-13)
Signal Description
RS485 T+ RS485 transmission +
RS485 T- RS485 transmission –
NC Reserved
RS485 R+ RS485 reception +
RS485 R- RS485 reception –
NC Reserved
CANH Positive terminal for
CAN communications
CANL Negative terminal for
CAN communications
Definition Description
Fault, major If the ESM raises one of the following
alarm alarms, the dry contact supplies an
alarm signal:
Cell voltage sampling fault, cell
temperature sampling fault, charge
converter output short circuit, relay coil
short-circuit, charge low temperature
protection, discharge low temperature
protection, charge high temperature
protection, discharge high temperature
protection, power module internal
overtemperature protection, discharge
converter output short circuit, input
reverse connection, BMU anti-theft lock,
overload lockout due to component
failure, serial number conflict, serial
number conflict, input/output discharge
overvoltage lockout, and discharge
overcurrent lockout
Copyright © Huawei Technologies Co., Ltd.
3 Components
Remark
Four-wire RS485
communications, complying
with the Modbus protocol
-
Used to report alarms to a
monitoring unit and
exchange data between
ESMs connected in parallel.
Alarm
Status
Configurabl
e (If the dry
contact is
closed, an
alarm is
reported by
default.)
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