TP48200A-DX12A1 Telecom Power
User Manual
3 Components
Issue 07 (2019-11-15)
Copyright © Huawei Technologies Co., Ltd.
28
Port Type
Silk Screen
Description
ALM5
ALM6
ALM7
ALM8
Communications port
COM
RS485 port
Communications Port
Table 3-9
COM communications port description
Communications Port
Communications
Parameter
Communications
Protocol
Function
COM port
Baud rate: 9600 bit/s, 19,200
bit/s, 115,200 bit/s
Master/slave protocols
and Modbus
Connects to a
lower-level device
such as the battery
voltage detector or
intelligent air
conditioner.
NOTE
The COM port is protected by a security mechanism.
Figure 3-9
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.