Huawei EMMA Pro - Connecting RS485 Communications Cables, DO Signal Cables, and 12 V Output Cables

5.3 Connecting RS485 Communications Cables, DO
Signal Cables, and 12 V Output Cables
Context
Figure 5-9 14-pin connector
Port Pin Function Description
RS485 RS485A1 RS485A, RS485
dierential signal+
Connect to the inverter.
RS485B1 RS485B, RS485
dierential signal–
RS485A2 RS485A, RS485
dierential signal+
Reserved for connecting to a third-
party device.
RS485B2 RS485B, RS485
dierential signal–
DI DI1+ Digital input signal 1+ Reserved for two DI ports or dry
contacts of the ATS and gensets in
the SmartGuard scenario.
DI1- Digital input signal 1–
DI2+ Digital input signal 2+
DI2- Digital input signal 2–
12V_OUT + 12 V power output+ ● The rated output power capability
is 12 V@100 mA, and the output
voltage ranges from 9.5 V to 13.2
V.
● The port is used to help the DO
control the heat pump.
- 12 V power output–
EMMA-(A01, A02)
User Manual 5 Electrical Connections
Issue 05 (2024-01-19) Copyright © Huawei Digital Power Technologies Co., Ltd. 35