Fully assembled and tested board for interfacing Variable Frequency drives to CNC controller through parallel port breakout board.

• Input and Outputs are Isolated.
• 0-10V output can be adjusted using preset.
• Works over a wide range of PWM frequency..
• 2 on board relays for On-Off control
• One relay is auto triggered when PWM duty cycle is more than 5% and can be used for spindle On/Off control if CNC software bumps the PWM to zero when switching off the spindle. This can save one output pin on parallel port.
• Second Relay is independent and can be used for On/Off or any other function.