I've got a new device I'm trying to hook up to my OmniPro II system, and it has 4 separate outputs (they correspond to 4 individual channels that get triggered on the device). The problem is that while it has a separate wire for each output, it has only a single shared ground/common. Will the OmniPro handle chaining the "-" side of four different zones together? When I measure the impedance between the "-" side of two different unused zones on my system, I get ~5 k ohms, so clearly they aren't all tied directly together in the OmniPro panel. The only way (other than a messy 4 relay interface between the device and my OmniPro) I see of hooking up more than one channel from my new device is to daisy chain the common wire from the device to 4 different OmniPro "-" connections on 4 zones.