ETP48400-C9A2 Embedded Power
User Manual
3 Components
Issue 05 (2020-04-07)
Copyright © Huawei Technologies Co., Ltd.
25
Communication
Port
Communications
Parameter
Communications
Protocol
Function
19,200 bit/s, 115,200
bit/s
protocol
lower-level
devices such as the
battery inspection
unit, DC air
conditioner.
NOTE
The COM port supports the security mechanism.
Figure 3-8
Pins in the COM port
Table 3-10
Pin definitions for the COM port
Pin
Signal
Description
1
RX+
Receives data over RS485.
2
RX-
4
TX+
Sends data over RS485.
5
TX-
6
PGND
Connects to the ground.
3, 7, 8
None
N/A
Pins
shows the pin numbers of the sensor ports.