PSC01 input

Does anyone have the input schematic for the PSC01? ( It is a X10 pro Powerflash interface unit ) I would like to have a delay between a door switch open/close and the PSC01's output. If I know what the input circuit is I think I can just add some simple ciruitry to do this within the module. I am trying to avoid making a seperate delay module. ( be nice if it was built into the PSC01 as a feature ...) FYI the system is to switch off an airconditioner when people leave the door open! The PSC01 and a UM506 will do the job fine but without a delay the airconditioner will be burped everytime someone comes in or out. Thanks for your help.. please email me directly as well as posting if possible. ron