One relay output port, can control the spindle switch.All of the input signal through all optical coupling isolation, can be accessed by emergency stop, the knife, spacing, etc., to protect computer security.The external wide voltage input, 12-24V, and have anti-reverse function.USB power and peripheral power supply phase separation to protect computer security.Full support for MACH3 and other support parallel port control computer software.5 Axis USB CNC Breakout Board with Optical Coupler.price is complete set of one piece cable, Breakout Board card and USB cable.*25 pin DB25 parallel male to female printer cable.
