Com Terminal Connection - Goodwe ET Series User Manual

User Manual V1.2-2022-03-30
ETR models, the net cable should be prepared by the customer and should be no longer than
5m.
Connection steps
1. Confirm that the battery and inverter power cables are connected (refer to 2.4.2 Battery
Wiring Connections).
2. Connect the BMS communication cable of the inverter to the communication interface of the
lithium battery.
3. Select the corresponding battery via the APP (please refer to the user manual of the PV master
app).
ETR
ONLY

2.5.3 COM Terminal Connection

ET Plus Series
Follow the pin definition below to connect the communication cables. Do not remove the
resistor or short circuit wire unless you are going to use the corresponding PINs.
Definition
PIN
1 485_A1
2 485_B1
3 DRM 1/5 or DI_1
4 DRM 2/6 or DI_2
5 DRM 3/7 or DI_3
6 DRM 4/8 or DI_4
COM/DRM0 or
7
REF_1
8 REFGEN or REF_2
Function PIN
9
RS485
10
11
12
13/14
DRED or RCR
15/16
17
18
17
Installation Instructions
Definition
Remote Shutdown
GND-S
LG_EN+
LG_EN-
N/A
DO-
Dry Contact of
DO+
Function
Remote
Shutdown
LG Battery
Enabling
Signal
N/A
Load Control