In order for ANY-maze to detect a photo-beam break, or turn a shocker on or off, the equipment obviously needs to be physically connected to your computer. These connections are made using what's called an input/output device and ANY-maze supports a number of them:
The Switch and Sense 8/8
A top quality USB based I/O device.
8 optically isolated inputs.
8 relay outputs which can directly switch loads up 6 amps at 120VAC.