This keypad is by Linear and can work well in commercial applications, such as hospitals, warehouses, office buildings and more. The rugged, cast aluminum housing protects the keypad from the elements so the pad can be used indoor or outdoor mounting on a wall or pedestal. Four independent outputs and timers: two form C relays and two solid-state open collector outputs with unique programming per entry code. Up to 480 programmable input codes of one to six digits each for activating either or both relays. Two LED indicators show system status. Key operating features include: door sense input; inhibit input; request-to-exit input; alarm shunt output; timed anti-passback; and keypad lockout.