Shenzhen RelFar Intelligent Technology Co., Ltd.
6.8 CN4 reserved serial port interface
CN4 reserved serial port interface is a 5-pin green terminal without wiring. Chart
6.8.1 shows the definition of CN4 interface.
Table 6.8.1
Pin
Signal
Definition
Description
1
OVCC +24V power supply, 500mA
Power supply
2
485+
TXD signal
Serial communication TXD signal
3
485-
RXD signal
Serial communication RXD signal
4
GND
GND
—
5
Input0
Reserved input interface
6.9 CN6 external start and interlock interface
The CN6 interface is a 4PIN green terminal. Table 6.9.1 shows the
definition of CN6 interface.
Table 6.9.1
Pin
Signal
Definition
Instruction
Generally connecting to the start button switch on
1
GND
Reference ground
the welding head-
External start switch Generally connecting to the start button switch on
2
Start
input
the welding head+
The pin must be connected to the safety clamp and
Safety clamp signal
3
Injector
the safety clamp shall be clamped onto the metal
input
material before welding.
The pin must be connected to the nozzle of the
Safety lock signal
4
Interlock
handheld head. The nozzle touches the metal
input
material at the moment of welding.
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