Pylontech PowerCube-X1-V2 Operation Manual page 34

CAN Address dial bit
Address
1 2 3
1
3.6.4.2 For Multi-groups communication wiring connection
With SC0500-40S-V2 / SC0500-100S-V2, there DONOT need a MBMS for
multi-groups operation.
For the existing installation (with old SC0500-40S/SC0500-100S)
capacity expansion or BMS replacement activity, please REMOVE the
MBMS and add on the SC0500-40S-V2 / SC0500-100S-V2 at the master
position for further communication with existing inverter directly.
The communication cable shall connect follow below diagram, from
the first BMS 'Link Port B' to the second BMS 'RS485 / Link Port
A', from the second BMS 'Link Port B' to the third BMS 'RS485 /
Link Port A', all the way to the last BMS' 'RS485 / Link Port A'.
The BMS with 'RS485 / Link Port A' EMPTY is defined as the master
BMS, and further communication with the inverter.
4 5 6(Terminal
Resistance)
No requirement.
29
Master or slave
relationship
Master