Instructions

2 / 3
1
0
0
0
RS485:9600
CAN terminal
resistance: connected
0
1
0
0
RS485: 115200
CAN terminal
resistance: NONE
Which means if for the previous US2000/US3000, the inverter requires all ADD switch to
DOWN position, then on US2000C/US3000C it shall change the ADD switch all to UP
position. The default settings on ADD switch is all to UP position.
Dip1: RS485 baud rate: 1: 9600; 0: 115200. After change, please restart battery.
Dip2: CAN terminal resistance on BMS side. 1: NONE. 0: connected. After change, no
restart required. In single group mode, please keep dip2 at 0 position. For multi-groups,
please refer to operation manual.
Dip3~4, reversed.
If do not require RS485 baudrate changing OR no multiple groups using purpose.
Please DONOT change the default ADD switch settings otherwise the communication
with inverter will be affected.
2) Communication cable configuration
Following below table, please make sure in any case the Pin1/2/3 on both A/CAN and
B/RS485 ports shall be NULL. Otherwise the communication quality will be affected.
Definition of RJ45 Port Pin
A/CAN
B/RS485
Pin1
These pins shall be NULL.
If not, may influence communication
between BMS and inverter.
Pin2
Pin3
Pin4
CAN-H
CAN-H (single group)
Pin5
CAH-L
CAN-L (single group)
Pin6
CAN-GND
CAN-GND (single group)
Pin7
485A
485A
Pin8
485B
485B
Please also notice that the pin order of GND is changed from Pin2 (US2000/US3000) to