I use a USB Power Injector that feeds a regulated 5vdc to the 8/8/8. I had to do this as any more then two relays ON (I have
would cause all the relays to go off. This was due to the voltage drop over the ethernet cable.http://www.streakwave.com/Itemdesc.asp?ic=5VUSB
The 8/8/8 was working OK with the power injector but now drops offline intermittently. I have to unplug the USB cable and reconnect it.
I have 8 relays, a temp & voltage and light sensor. I use 7 of the 8 inputs for position sensors (reed switches).