What’s the part number of the door board? Something doesn’t sound right. Is this an actual Tac50 with card rack or is it a 50-03 or 50-04? The ABN boards with UIT that replaced the original Smartech don’t have any additional interface board. They are discrete already. It sounds like you’re talking about an HDLM operator that was used on Mod jobs with TAC50-04. Not that it couldn’t be used on a Tac50 but I’ve never seen it done an not sure why it would be.
