3.4 Control terminal and function

Category	Terminal Symbol	Terminal Name	Function Description
Power	+10V-GND	+10V Power	Provides +10V power externally, maximum output current: 20mA, typically used as the operating power supply for external potentiometers
Power	+24V-COM	+24V Power	Provides +24V power externally, maximum output current: 150mA, generally used as the power supply for digital input-output terminals and external sensor power
Power	OP	External Power Input Terminal	Connects to +24V or COM through the connection piece on the control board (factory default connection to +24V) When driving DI1~DI6 with external signals, OP needs to be connected to an external power source, and the short-circuit connection piece between OP and 24V should be removed
Analog Input	AI1-GND	Analog Input Terminal 1	1. Input Range: DC 0V~10V/0mA, selected by parameter P4-37 for voltage or current input. 2. Input Impedance: 22kΩ for voltage input, 500Ω for current input
Analog Input	AI2-GND	Analog Input Terminal 2	1. Input Range: DC 0V~10V/0mA, selected by parameter P4-37 for voltage or current input. 2. Input Impedance: 22kΩ for voltage input, 500Ω for current input
Digital Input	X1, X2, X3, X4, X5, X6, X7	Digital Input 1, 2, 3, 4, 5, 6, 7	1. Opto-isolation 2. Input Impedance: 4kΩ Input Voltage Range: 9V~30V
Analog Output	AO1-GND	Analog Output 1	AO1, AO2 are selected for voltage or current output by jumpers J3 and J2 on the control board Output Voltage Range: 0V~10V Output Current Range: 0mA~20mA Factory default is voltage output
Analog Output	AO2-GND (shared with Y1 for models below 18.5kW, selected by jumpers)	Analog Output 2	AO1, AO2 are selected for voltage or current output by jumpers J3 and J2 on the control board Output Voltage Range: 0V~10V Output Current Range: 0mA~20mA Factory default is voltage output
Digital Output	HD0	High-Speed Pulse Output Collector-Emitter Open Circuit Output	1. Opto-isolation, bipolar open circuit collector output. 2. Output Voltage Range: 0V~24V Output Current Range: 0mA~50mA (Note: For models of 18.5kW and below, Y1 function can be switched to analog output by jumpers)
Digital Output	Y1	Digital Output 1 Analog Voltage Output 2	1. Opto-isolation, bipolar open circuit collector output. 2. Output Voltage Range: 0V~24V Output Current Range: 0mA~50mA (Note: For models of 18.5kW and below, Y1 function can be switched to analog output by jumpers)
Relay Output	K1A-K1B, K2A-K2B	Normally Closed Terminals	Contact Drive Capacity: AC 250V, 3A; DC 30V, 1A
Relay Output	K1A-K1C, K2A-K2C	Normally Open Terminals	Contact Drive Capacity: AC 250V, 3A; DC 30V, 1A
RS485 Communication	RS+	RS485 Communication Terminal Positive	RS485 Differential Signal Positive Terminal
RS485 Communication	RS-	RS485 Communication Terminal Negative	RS485 Differential Signal Negative Terminal

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