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