Keri Systems NXT-4X4-NE Input/Output Expansion Module, No Enclosure

The Keri Systems NXT-4X4-NE Input/Output Expansion Module adds auxiliary I/O capabilities to Doors.NET access control systems. It supports up to 4 inputs and 4 outputs, enhancing the system's ability to monitor additional doors or devices.

This module connects via an RS-485 trunk, commonly near a reader or controller, and each trunk supports one expansion. It works with NXT-2D and NXT-4D controllers, offering up to an extra 8 inputs and outputs. Relays on the module are reassignable and interchangeable with the main controller relays.

The NXT-4X4-NE includes features such as 4-state supervision inputs, forced held-open alarms, and support for REX inputs, bond sensors, and general-purpose functions. It has flash memory for easy upgrades, status indicator LEDs, and quick disconnect connectors, which simplify wiring and allow flexible installation locations.