Features Supported computer software: Stepper motor interface board fully supports MACH3 and other computer software that supports parallel port control. USB power supply and peripheral power supply are separated to ensure computer safety. Anti-reverse connection function: MACH3 interface board can be used for 12-24V wide peripheral voltage input, with anti-reverse connection function. All input signals are isolated by optocoupler, which can be connected to emergency stop, tool setting, limit, etc. 0-10V analog voltage output: CNC interface board adopts single-channel optocoupler isolation 0-10V analog voltage output, and the inverter can control the spindle speed through the corresponding analog interface. The output port is P1 port. Can control 5-axis stepper motor: 17 ports are fully open, can be connected to optocoupler drive, and can control 5-axis stepper motor. The single relay output port can control the spindle switch. The output port is P17 port. Control the spindle speed governor: P1 is used as a PWM output, and the spindle speed governor can be controlled through the optocoupler input. It can be connected to common cathode/anode drive, and the input level is 5V. Features: 1. Fully support for MACH3 and other computer software that supports parallel port control. 2. USB power supply and peripheral power supply are separated to ensure computer security. 3. 12-24V wide peripheral voltage input, with anti-reverse connection function. 4. All input signals are isolated by optical coupling, and can be connected to emergency stop, tool setting, limit, etc. 5. One-way relay output port can control the spindle switch. The output port is P17 port. 6. One-way optocoupler isolated 0-10V analog voltage output can control the inverter with the corresponding analog interface to control the spindle speed. The output port is the P1 port. 7. Open all 17 ports, can be connected with optocoupler drive, can control 5-axis stepper motor. 8. P1 acts as a PWM output and can control the spindle governor with optocoupler input.   Specification: Input voltage range: 12-24VDC Package weight: Approx. 335g/11.8oz   Package list: 1 * Stepper Motor Interface Board 1 * USB Cable 1 * Parallel Port Cable Package List