Connecting the module
First make sure the module is powered by connecting pin 1 of the connector to the negative pole of the
power supply like a battery pack. Now connect pin 4 of the connector to the positive pole of the power
supply. The system is functional.
As soon as a signal like the positive of the power supply is applied to input 1 (pin 2 of the connector),
relay 1 turns on. When the signal is removed, the relay turns off. Relay 2 behaves the same. By applying a
signal to input2, relay 2 turns on. Removing the signal turns relay 2 off.
Example schematics with BMS123 Smart
