TP48200A-HX09A2, TBC300A-TCA2 Outdoor Power
System
User Manual
2 Components
Issue 02 (2019-02-26)
Copyright © Huawei Technologies Co., Ltd.
20
Port Type
Silk Screen
Description
ALM4
ALM5
ALM6
ALM7
ALM8
Communications port
COM
RS485 port
Communication Port
Table 2-10
COM communication port description
Communication
Port
Communications
Parameter
Communications
Protocol
Function
COM port
Baud rate: 9600 bit/s,
19,200 bit/s, 115,200
bit/s
M/S and Modbus
protocol
Connects to
lower-level
devices such as
the battery
inspection unit,
DC air
conditioner.
NOTE
The COM port supports the security mechanism.
Figure 2-14
Pins in the COM port
Table 2-11
Pin definitions for the COM port
Pin
Signal
Description
1
RX+
Receives data over RS485.
2
RX-