3
1.2.2.4
1.2.2.4.1 Interface Function Drawing
1.2.2.4.2 Power
The input power is 12V DC, external power supply can be prepared.
Note: pay attention to the polarity of power input and connect power according to the interface instruction.
1.2.2.4.3 Communication Interfaces
CAN communication interface: It is connected to air conditioner through two-core connection wire, to realize communication
between Modbus Gateway(Mini) and air conditioner.
RS485 communication interface: It is connected to BMS through two-core communication cable, to realize communication
between Modbus Gateway(Mini) and BMS or nearby Modbus Gateway(Mini).
1.2.3
1.2.3.1
Function introduction
The function of photoelectric isolation converter is to conduct conversion to the RS232 signal of computer port and the signal of
RS485 bus. It can only be adopted when the communication method of user’s BMS is RS232.
Modbus Gateway(Mini)
Interface
Introduction of photoelectric isolation converter
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