Shenzhen RelFar Intelligent Technology Co., Ltd.
6.6 CN3 temperature sensor interface
The temperature sensor interface CN3 is a 4PIN green terminal. Table
6.6.1 shows the definition of temperature sensor. The user directly inserts
the supporting connection line with terminal.
Table 6.6.1
Pin
Signal
Definition
1
+5V_out Sensor P interface
Instruction
+5V power supply, maximum output is 500mA
2
Light Sensor L interface
3
Temp Sensor T interface
4
GND Sensor G interface
6.7 HMI touch screen interface
The HMI interface is a 4PIN green terminal and power supply to and
communication with HMI by the mainboard are performed via the port.
Table 6.7.1 shows the definition of HMI interface.
Table 6.7.1
Pin
Signal
Definition
Instruction
1
OVCC +24V power output, 500mA
Panel power supply
2 TXD_HMI Connecting to the HMI sending end Serial port communication TXD signal
3 RXD_HMI Connecting to the HMI receiving end Serial port communication RXD signal
4
GND
Power reference ground
24
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