Originally Posted by gunrunnerjohn:
Nope Stan, I'm not sure. Very limited information, I don't have one to actually look at. 
This one needs positive voltages.
At the risk of sounding like a broken record, are you sure about that? 
Each relay is driven by a PNP transistor. To forward bias or turn the transistor on, you must supply an "active low" input signal.
But I do agree on the limited information. They apparently specify the relay current (50-60mA) but that's after the transistor buffer. They should also specify the input control current. But like someone commented earlier, you can't even buy the parts for anywhere near the price of the completed module delivered to your door.
