PYLON TECH US2000C 48V Rechargeable Lithium-Ion Battery Instructions
- June 9, 2024
- PYLON TECH
Table of Contents
Pylon Technologies Official Statement
**Dec. 10th, 2020
Subject: US2000C/US3000C Communication Settings**
US2000C 48V Rechargeable Lithium-Ion Battery
Dear valued customer,
Its been noticed that among new installations of US2000C/US3000C, in few cases of the modules will suffer buzzer ringing with alarm lighting on permanently after installation in a short period. The root cause of buzzer ringing with alarm lighting on permanently is the modules have experienced overcharge to above 55Vdc or power device on BMS is damaged, which triggered the secondary protection elements deployed on the BMS. In either case it will need a replacement of the BMS. During further analysis, its found that in all cases the modules have been
overcharged to above 55Vdc. This is mainly due to the communication between
inverter and battery
haven`t been set up properly. Below highlighted two main changings of
US2000C/US3000C which will affect the external communication quality:
ADD Switch settings
Based on the new design of BMS, the ADD switch is reversely deployed.
For instance:
Dip1| Dip2| Dip3| Dip4| The corresponding
position of switch| Status
---|---|---|---|---|---
0| 0| 0| 0| | RS485:115200
CAN terminal resistance: connected
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.
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
---|---|---
Pint| 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)
Pin?| 485A| 485A
PinB| 485B| 485B
Please also notice that the pin order of GND is changed from Pin2 (US2000/US3000) to Pin 6(US2000C/US3000C).
For direct-pin communication inverter, please make sure the communication
cable Pin1/2/3 are NULL. Or alternatively order the correct communication
cable (WI0SCAN30RJ1) or external cable kits (BW0US3000BAL0007) from us.
For cross-pin communication inverter, please make sure it`s strictly follow
the Pin order and requirements defined above to make the cable. It needs to
highlight that due to Pin1/2/3 shall be NULL, some of the premade cross-pin
communication cable supplied by inverter manufacture will be not applicable.
Apart from above two points, for some inverter operation interface it also
supports manual settings of the operation voltage on the battery module. Under
lithium battery operation mode such kind of manual settings might be followed
in case the communication with battery is lost. Please make sure the charge
cut-off voltage is set at 53.2 – 52.5Vdc, discharge cut-off voltage is set at
45.5Vdc or higher for US2000C/US3000C.
Pylontech Service Team
Pylon Technologies Co., Ltd.
T +86-21-51317697| F +86-21-51317698
E [email protected]
W www.pylontech.com.cn
Pylon Technologies Co., Ltd.
No. 73, Lane 887, Zu Chongzhi Road, Zhangjiang Hi-Tech Park Pudong, Shanghai
201203, China