Solar MD Proprietary Limited
Company Registration: 2014/169938/07
T: 021 555 2181
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5.
Communication
5.1
Physical connection CANBUS interface devices communicate to each
other over CANBUS interface. This interface contains two pins: CAN
HIGH and CAN LOW. All devices must be connected in parallel see
Figure 9
Only one termination resistor 120 Ohm must be connected for entire
network. Each device has built in termination resistor which can be
activated with jumper. For Bmspl this jumper is located on top of
connector1 see Figure 7. In Figure 9 only Logger has active termination jumper.
Table 1 Connectors pin map
Connector 1(figure7)
Connector 2 (figure7)
Pin
Function
Pin
Function
1
CAN LOW
1
5V aux power supply 2A max
2
CAN HIGH
2
General purpose input1.
3
CAN GROUND
3
General purpose input2.
4
Bat + (51.2) pack voltage
4
General purpose input3.
5
5V aux power supply 2A max
5
General purpose output1.
6
Not connected
6
General purpose output2.
7
Not connected
7
General purpose output3
8
Ground
8
Ground
Figure 9 CANBUS architecture
