Keri Systems NXT-4X4-NE 4-Input / 4-Output Auxiliary I/O and Local Door Control Module, No Enclosure

Add flexible auxiliary I/O to your Doors.NET access control deployment with the Keri Systems NXT-4X4-NE 4-Input / 4-Output Control Panel Module. Purpose-built for expanding security and surveillance capabilities, this module provides 4 auxiliary inputs and 4 auxiliary outputs to monitor additional doors, bond sensors, REX inputs or to automate lighting and alarms. Connect anywhere along the RS-485 trunk for simplified wiring and place modules near controllers or readers to optimize installation. Inputs support 4-state supervision for reliable tamper and circuit monitoring, while status LEDs offer clear, on-board diagnostics. The module is powered from the controller by default (with an optional standalone power option) and features flash memory for straightforward firmware upgrades—reducing service time and future-proofing your system. Re-assignable I/O lets you interchange module functions with controller door I/O, enabling tailored access control logic and improved system scalability. Ideal for integrators and security managers upgrading surveillance and monitoring capabilities, the NXT-4X4-NE is a compact, professional solution for door control and auxiliary automation. Order this Keri Systems module for your next security upgrade or contact our team to spec it into your access control project.

• Expand access control and monitoring by adding 4 auxiliary inputs and 4 outputs per module to handle additional doors, sensors, or automation
• RS-485 trunk connectivity allows flexible placement at controllers or readers to simplify installation and reduce cabling costs
• Re-assignable I/O that is interchangeable with controller door I/O for seamless integration and customizable door control logic
• Supervised 4-state inputs and status LEDs deliver reliable intrusion/door monitoring and quick diagnostics for security teams
• Powered from the controller (or optional standalone supply) with flash memory for easy firmware upgrades to minimize maintenance downtime