[quote="scange"]Does anyone know the correct way to set up a GPI loopback? I got the pinout from the Grass site. Is it as simple as connecting A and B outs to A and B ins? Thanks, Mike~[/quote] On the 4K the voltage is on the frame, the kalypso needs a walwart.. Curious most of the stuff you would use a loopback for can now be done by macros on a Kalypso. This may be easier then wiring anything Bill

Thanks a lot. I already sent out an email to the engineers to get them going. It should help me a lot. Mike~

Scange is right I bought a set of connectors for the for the 3/4k so that I can wire them up at home. I carry them with me to the remotes. If I come across a truck that does not have any or part of the GPI'S hooked up, I ask the EIC if I can plug mine in. I put the empty set of connectors of the that switcher in my pocket and leave my wired set in place. That way I can wire up at home the empty connectors from that truck so that I can be ready for the next remote truck. No relays needed, no 5 volts needed, just wire and the empty connectors. I'm hooking up the GPI out's into the GPI in's....one truck at a time. Works great for me and everyone else.

On a 3K/4K you needed +5v DC on the input. (GPI IN) I would think that the Kalypso also needs the +5 as well.