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EMMA-(A01, A02)
User Manual
Port
Pin
12V_IN
+
-
RS485
A1
B1
CT Input
IA*
IA
IB*
IB
IC*
IC
Procedure
Step 1 Prepare cord end terminals for AC power cables and determine whether to
prepare external CT cables as needed.
1.
2.
Issue 01 (2023-09-15)
Function
12 V power input+
12 V power input–
RS485A, RS485
differential signal+
RS485B, RS485
differential signal–
External CT input
phase A+
External CT input
phase A–
External CT input
phase B+
External CT input
phase B–
External CT input
phase C+
External CT input
phase C–
You are advised to prepare cord end terminals for AC power cables.
(1) Cord end terminal
(Optional) For the external CT connection, connect the external CT cables to
the 10-pin signal connector.
Copyright © Huawei Digital Power Technologies Co., Ltd.
5 Electrical Connections
Description
Used only in the SmartGuard scenario
for the whole-house power backup.
The SmartGuard provides 12 V DC
power for the EMMA when the EMMA
is in offline mode.
Used to connect to the SmartGuard.
Used to connect to an external CT.
(2) Crimping tool
29
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