Pin
Signal
Description
2
BTE
Battery temperature
sensor port
3
4
ETE
Ambient temperature
sensor port
5
7
GAT
Door status sensor port
8
9
CAN+
CAN communications
port
10
CAN-
Communications Ports
Table 1-4 Communications port description
Communications
Port
Communications
Parameter
Communications
Protocol
Function
COM
Baud rate: 9600
bit/s, 19200 bit/s,
115200 bit/s
Master/slave
protocol
Manages site
devices or third-
party devices.
-
Provides 12 V
power supply for
external devices.
FE
10/100 M
autonegotiation
SNMP protocols
Connects to a
third-party
management
system.
HTTPS protocols
Connects to a PC
and manages the
SMU through the
WebUI.
NOTE
All these ports are protected by a security mechanism.
Figure 1-3 Pins in the COM port
SMU11B Site Monitoring Unit
User Manual
1 Description of Components
Issue 03 (2022-06-06)
Copyright © Huawei Technologies Co., Ltd.
4