How to install the BM2:
How to install the BM2:
The BM2 is connected on the balancer port or on a Futaba/JR connector to the battery/batteries you want to monitor. The batteries may be of different types! It can remain there for a couple of days, as it consumes very little power in the stand-by mode.
The IISI-Link port is connected to a TXE IISI-Link port. You can use a Y cable to connect more than one expander.
When using only one battery, please connect it to the BAT1 connector.
You also can connect a BEC to one of the BAT1 or BAT2 ports to monitor the BEC voltage.
Please note that the 2 GND pins of the BM2 are connected internally through resistors. This means that the 2 black wires of your batteries must be connected together, or both batteries must be completely independent.
The connection to the IISI-Link is of type OPTO. To configure the BM2, you need to connect a battery on the BAT1 connector.
Monitoring 2 batteries: