Keri Systems NXT-4X4UL Optional Local Door Control Module with UL294 Option

Improve site security and simplify deployment with the Keri Systems NXT-4X4UL Optional Local Door Control Module. Designed for Doors.NET access control systems, this control panel module delivers immediate, field-installable auxiliary I/O—4 inputs and 4 outputs per module—to monitor non-reader doors, bond sensors, REX devices and trigger door forced or door held-open alarms. The module connects anywhere along the RS-485 trunk for flexible placement near controllers or readers, reducing cabling and installation time. You can reassign and interchange the module’s I/O with the controller’s door I/O for faster configuration, and scale capacity up to four modules on an NXT-4D (16 inputs/16 outputs) or two on an NXT-2D (8 inputs/8 outputs). With an available UL294 option, onboard flash memory for upgrades, and status LEDs for power, comms and relay state, the NXT-4X4UL supports reliable monitoring and integration with surveillance and building management systems. Ideal for commercial, education and healthcare access control projects—add this Keri Systems control module to your design to expand functionality and strengthen security monitoring. Contact your supplier to specify and order today.

• Add scalable I/O to Doors.NET: 4 auxiliary inputs and 4 auxiliary outputs per module to monitor doors, sensors and alarms
• Flexible installation via RS-485 trunk connection; powered from the controller or optional standalone supply for simplified wiring
• Re-assignable, interchangeable door I/O to reduce rewiring and enable fast configuration and diagnostics
• Scalable expansion: up to 2 modules on NXT-2D (8 I/O) and up to 4 modules on NXT-4D (16 I/O) for larger sites
• UL294 option and onboard flash memory for firmware upgrades, plus status LEDs for quick troubleshooting