The door operator is some homemade contraption from NVOV. They are using a Dover clutch and pick up rollers, but the operator is a belt driven 9VDC (Not a typo its only 9V) set up with a interface board.
The unit was installed in 1999, with the Ng-12 controller.
I located a partial set of prints from another site, but they do not show the door operator board, and only one the nomenclature sheets.
The best I can tell is the board is fed with 120VAC , but if the nomenclature sheet is correct, the door board is getting a level up and level down signal for some reason.