@Robert Capotosto posted:"Each TIU used with a layout must have a unique TIU #1 through 5. Numbering TIUs is required by DCS.
Not in many cases. I have a bench TIU and the TIU running my layout. They're both at #1 and always have been. Note that Chris is powering up only one of the TIU's at a time, no problem there.