If programmed for door sense, a switch on the door detects forced entry or door ajar situations. The DOOR SENSE/INHIBIT input can be used two ways. An internal sounder beeps when each key is pressed. The light can be programmed to activate indefinitely, or for 1, 2, 3, or 4 minutes after the last key press, or not light at all. The keypad's courtesy light illuminates the keys. The right indicator lights yellow when the keypad is in lockout condition (from too many incorrect code entries). The left indicator lights red to indicate power, then turns green when access is granted. Indicators: Two indicators show the status of the entry system. When power is restored to the keypad, each relay will assume the state it was in when power was removed. The on or off toggle state of a relay is maintained even after power interruption. The relays can be set for timed or latch-on/latch-off toggle operation per each individual entry code. They can activate either, or both, of the relay outputs. Users: Up to 480 entry codes, from 1 to 6 digits in length, can be programmed. Keylock secures keypad to mounting backplate.Programmable courtesy light illuminates keypad for 1, 2, 3, or 4 minutes, or always on.Key operating features include: door sense input inhibit input request-to-exit input alarm shunt output timed anti-passback and keypad lockout.Up to 480 programmable input codes of one to six digits each for activating either or both relays.Four independent outputs and timers: two form C relays and two solid-state open collector outputs with unique programming per entry code.Rugged, cast aluminum enclosure for indoor or outdoor mounting on a wall or pedestal.Self-contained keyless entry system ideal for airports, hospitals, warehouses, office buildings, parking lots, and many other commercial facilities.Nortek - Linear AK-11 Exterior Surface Mount Keypad - 480 Entry Code Capacity
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