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Appendix II: BMS Communication Installation
1.
Introduction
If connecting to lithium battery, it is recommended to purchase a custom-made RJ45 communication cable.
Please check with your dealer or integrator for details.
This custom-made RJ45 communication cable delivers information and signal between lithium battery and the
inverter. These information are listed below:
Re-configure charging voltage, charging current and battery discharge cut-off voltage according to the
lithium battery parameters.
Have the inverter start or stop charging according to the status of lithium battery.
2.
Pin Assignment for BMS Communication Port
Definition
PIN 1
RS232TX
PIN 2
RS232RX
PIN 3
RS485B
PIN 4
NC
PIN 5
RS485A
PIN 6
CANH
PIN 7
CANL
PIN 8
GND
3.
Lithium Battery Communication Configuration
PYLONTECH
Dip Switch: There are 4 Dip Switches that sets different baud rate and battery group address. If switch position
is turned to the “OFF” position, it means “0”. If switch position is turned to the “ON” position, it means “1”.
Dip 1 is “ON” to represent the baud rate 9600.
Dip 2, 3 and 4 are to set up battery group address.
Dip switch 2, 3 and 4 on master battery (first battery) are to set up or change the group address.