ELEVATOR CONTROLLER; includes 1 master controller board, 1 two-door board (used to add 2 readers for 2 elevator cabs), and one 8 floor board; mounted in steel vented and lockable enclosure; 2 relays with 1A limit; adds up to seven 8 floor boards to control up to 64 floors for 1 elevator cab or 32 floors for 2 elevator cabs; add 1 two-door board to control up to 16 floors for 4 elevator cabs.