Dry Contact Signal; Bms Communication - MPP Solar LV 6548 User Manual

Dry Contact Signal

There is one dry contact (3A/250VAC) available on the rear panel. It could be used to deliver signal to external
device when battery voltage reaches warning level.
Unit Status
Power Off Unit is off and no output is powered.
Output is
powered
from Battery
power or
Solar energy.
Power On

BMS Communication

It is recommended to purchase a special communication cable if you are connecting to Lithium-Ion battery
Appendix II- BMS Communication Installation
banks. Please refer to
Condition
Program 01 Battery voltage < Low DC
set as USB warning voltage
(utility first) Battery voltage > Setting
or SUB (solar value in Program 13 or
first) battery charging reaches
floating stage
Program 01 is Battery voltage < Setting
set as SBU value in Program 12
(SBU priority)
Battery voltage > Setting
value in Program 13 or
battery charging reaches
floating stage
12
Dry contact port:
NC & C
Close
Open
Close
Open
Close
for details.
NO & C
Open
Close
Open
Close
Open