Features:
4 auxiliary Inputs and 4 auxiliary Outputs per module Up to 4 modules (16 Inputs and Outputs) can be added per NXT-4D Controller, up to 2 modules (8 Inputs and 8 Outputs per NXT-2D Controller Re-assignable, Interchangeable with controllers door I/O 4-State Supervision on Inputs Can be used for Door Forced and Door Held Open Alarms as well as Auxiliary REX Inputs, Latch Integrity, Bond Sensor, or other general purpose functions Flash Memory for easy upgrades Powered from Controller (standard) or optional standalone power supply Status Indicator LEDs for power, communication, and relay position Quick Disconnect Connectors Locking Metal Enclosure (optional without) Reduces wiring by providing capability to move door management functions to the door location