1.Features:
1.full support for MACH3, KCAM4, EMC2, and support parallel
port to control the host computer software;
2.5 output signal ,can connect with 5 stepper motor driver ;
3.4 input port, Can connect to the limit switch, emergency stop,
or other Input devices ;
4.One relay, it can be used to control spindle start and stop;
5.Interface board built-in 5V power converter chip, can be
connected with DC 12V-60V power supply.

2.Electrical drawing

3.limit switches and emergency stop
switch connection methods:
Input interface, you can access limit, emergency stop switch can also
be connected to the reset, the knife and other input devices, when used
according to the actual situation of your set of reference the following
figure:

4.Definition on pins of parallel port: