The relays can be controlled by either 5 vDC on the input, or it can be adapted to wire up to a parallel port, does not include the actual parallel adaptor (just screw terminals), so that the module isn't limited to parallel port control.

Gentlemen, dust off your 386's and move into the future! Why stand up to turn on the lights in your workshop? Standing can be a thing of the past if you want it to be, now that you can control 4 relays (up to 500 watts through each) from your desktop.

4 relay outputs with LED indicator.

500 watts maximum output load for each relay.

Can be connected to the parallel port of your PC, or controlled by any other circuit or device, simply needs five volts across the input.

*How to wire to the parallel port*

IN1 = Pin 2

IN2 = Pin 3

IN3 = Pin 4

IN4 = Pin 5

GND = Pins 18 to 25

If you wish to control more than one of these modules from the same parallel port, then Pins 6 - 9 would be for the other IN 1 - 4.