Model # Description
NXT-4×4 4 Input / 4 Output Auxiliary I/O and Local Door Control Module, with Enclosure

NXT-4×4-NE 4 Input / 4 Output Auxiliary I/O and Local Door Control Module, without Enclosure

NXT Series

NXT 4×4 Expansion Module

The NXT-4X4 Input/Output Expansion Module provides functionality to any Doors.NET access control system by adding auxiliary I/O that can be used for additional access control functionality, monitoring non-reader doors or other devices, and creating powerful action sequences by linking input triggers to outputs. 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

The module’s inputs and outputs are re-assignable and interchangeable with the main controller’s inputs and outputs and 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 I/O. There is also a dedicated tamper input. The module can be mounted next to the door providing local door control and local door alarm functions while minimizing the cable bundle from door to controller. The unit also has a port to plug in a reader interface module (NXT-RMX) to allow Keri MS reader signals to be sent down the RS-485 line.

Find a local Access Control and Security Expert

Use our interactive map to find a local Keri sales representative

Keri Extensive Warranties

Reliability Assured

We stand by our engineering and craftsmanship and are so confident of reliability that we back our products with extensive industry-leading warranties.

Grow Your Business with a Bespoke Keri Solution

Win new business and grow your security company. We're by your side from initial bid to final inspection.

Tell us your security project's specifications

We begin the process with a 15-30 minute phone call to determine if we have a solution that can meet the needs of your job.

Together, we design an affordable solution

Our expert support team will help you design a security solution that meets your client’s needs and your financial requirements.

We partner with you to win new business

We know that once a plan is designed, there is still a competitive bidding process. We help you convince stakeholders and win new business.

Expert customer support  available

Once you’ve closed the sale and are on-site installing our equipment, our expert support team is available in the event that you need assistance.

Talk to us

Fill out the form below and an expert will reach out to give you more details on how to win new business with Keri.