Huawei Backup Box-B1 User Manual

10
Inverter AC
COM port (COM)
COM Port Pin Definitions
No.
Label
Definition
Description
5
GND
GND
Connects to the
GND of the DI2 port.
8
DI2
Digital
input
signal 2+
Connects to the positive terminal of DI2
and functions as the port for the Backup
Box to send feedback signals.
3.8
Connecting Signal Cables on the Inverter Side
SUN2000-(2KTL-6KTL)-L1
X4

Huawei Backup Box-B1 Specifications

General

Brand	Huawei
Model	Backup Box-B1
Category	Controller
Language	English