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The Security Event

30 April - 2 May 2024
NEC, Birmingham

Exhibitor Products

Security Cameras

22 Feb 2023

NXT 4×4 Expansion Module

Keri Systems Stand: 5/L90

The module can be connected anywhere along the RS-485 trunk, most commonly at the controller or near a reader. One module can be added per trunk, allowing up to an extra 8 inputs and 8 outputs on an NXT-2D Controller and an extra 16 inputs and outputs on an NXT-4D controller.

  • Flash Memory for easy upgrades
  • Re-assignable/Interchangeable with controller's door I/O
  • 4 auxiliary Inputs and 4 auxiliary Outputs per module
  • One 4x4 module can be added to each controller bus
  • 4-State Supervision on Inputs
  • Powered from Controller or by stand alone power supply
  • Status Indicator LEDs for power, communication, and relay position
  • Optional Locking Metal Enclosure


  • Access Control
  • Biometrics
  • Door Entry / Intercom
  • CCTV & Video Surveillance
  • Smart Buildings
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The Safety & Security Event Series


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  • Source products from over 350 world-leading suppliers, installers, integrators and manufacturers
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  • Co-located with 4 other leading-industry events: The Fire Safety Event, The Health & Safety Event, The Workplace Event and National Cyber Security Show

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