Connecting Rs485 Communication Cable; Connecting The
Ground Wire; Commissioning - SolaX Power BMS Parallel Box-II User Manual

4. Installation
4.6.3

Connecting RS485 Communication Cable

1) There is a protection cover for the RS485 connector.
Unscrew the cover and plug
one end of the RS485 communication cable to the RS485 connector. Tighten the
plastic screw nut which is set on the cable with a rotation wrench.
2) Connect the RS485 communication cable
from the box to the RS485 I communication port
that is on the left side of the battery module.
The wire order of the communication cable is as follows:
Sequence 1 2
RS485-1 VCC_485 GND_485
VCC_485 GND_485
RS485-2
4.6.4 Connecting the Ground Wire

Be sure the groung wire(10AWG/(4-6)mm ) must be connected.
18
Group1
Group2
RS485 I
RS485 I
3 4 5 6 7
B2 N- P+ A2 VCC_485_2
VCC_485_2
B2 N- P+ A2
2
5
5.1
The DIP switch is used to configure the communication between battery module(s)
and the inverter. Detailed configuration information is detailed as follows:
Configuration activated by inverter:
0- Matching a single battery group(group 1 or group2).
1- Matching both battery groups(group 1 and group2).
Black-start Configuration
The black-start function is only used in an off-grid application and when there is no
other power supply.
If the box is started in the black-start mode, even when there is no BMS
communication, the port still contains high voltage with risk of electric shock.
After the black-start mode has started, if the BMS communication has still not been
established within 3 minutes, the black start has failed.
8
4- Matching one/two/three/four battery modules of single group (group 1 or group2).
GND_485
4- Matching one battery module of each group (group 1 and group2).
GND_485
5- Matching two battery modules of each group (group 1 and group2).
6- Matching three battery modules of each group (group 1 and group2).
7- Matching four battery modules of each group (group 1 and group2).

Commissioning

Configuring the Box
CAUTION!
If DIP switch is 1, the number of batteries in each group must be
the same.
NOTE!
When powering on the box, the system will start self-testing. If the buzzer beeps,
it means the DIP configuration is in fault or communication failure has occured.
If the buzzer beeps check if the number of battery modules are corresponding
to the DIP configuration, and also check if the RS485 communication cables are
correctly connected. After checking that these two situations are set, press the
POWER button to power on, and press the POWER button again 10 seconds later.
In addition, the buzzer will only sound on the corresponding fault during the
power-on self-test. After the self-test has already been completed, it will not
beep again even if the same fault occurs.
4. Installation
6
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