Solar MD SS4143-11, Installation Manual

Page: 24 / 55

Figure 9: Voltage and capacity based charge and discharge control
CAN BUS 1 and 2
BMS-EX is equipped with two separate CAN BUS interfaces, each with various methods of
connection.
-
CANBUS 1: Comprising Screw connector 1, RJ45 connector 1 and RJ45 connector 2.
This interface is reserved for connecting SolarMD devices (BMS-EX, BMS-EM, BMS-PL, Logger
V-series, MPPT3000). The RJ45 connectors allow for easy daily chaining and the screw
connector for simple connection with older models. A maximum of 255 devices may be
connected to the interface. Each device is assigned a unique CABUS ID. The range of the
CANBUS ID’s is from 640 - 895.
-
CANBUS 2: For connecting the BMS directly to a compatible inverter / charger for
broadcasting charging and discharging current and voltage setpoints.
23