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ELK Alarm Engine Input Expander


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WARNING: Cancer and Reproductive Harm –


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Increase the Amount of Hardwired Zones in Your E27 Network

Increase the number of wired zones within your E27 security network with the ELK Alarm Engine Input Expander! This zone expander adds 16 hardwired zones (EOL resistor supervised) to a connected E27 Alarm Engine network. Up to 7 zone expanders may be connected to a single ELK-E27CB, increasing the total zone inputs to 128. It connects to the E27 Main Board via 4-wire data bus connection and includes DC power & battery connectors to allow for easy connection of remote power source/backup battery.

ELK Products requires any professional installers of Elk E27 Alarm Engine Systems to create an ElkConnect account.

  • Input expander includes 16 EOL Resistor Supervised Hardwire Zones
  • DIP switch enables selectable EOL resistance values (1.0K, 2.2K, or 3.3K)
  • 1 Form "C" Relay Output and DC power & battery connections
  • Operates on the 4-Wire Data Bus
  • Plug-In Terminal Strips and On-Board EOL Bus Termination Jumper
  • Status and Diagnostic LEDs give visual information of device status
  • Vertical Mounting using ELK-SWG Glides (included)


  • 16 Zone Input Expander
  • ELK-SWG Circuit Board Mounting Glides 2/pack
  • 18 2200 Ohm Resistors
  • Instructions

Premium Products For Security And Automation

ELK Products designs and manufactures quality electronic equipment for the professional security alarm and home automation installer. Our products include siren drivers, speakers, relays, timers, programmable controls, surge suppressors, telephone equipment, amplifiers, recordable units, batteries and more.


  • Manufacturer Part #: ELK-AEXIN
  • UPC: 762158570025
  • Inputs: Plug-In Terminals with Elevator Style Wire Clamps and Screws
  • Relay Contact Rating: 4 Amps @12VDC
  • Operating Power Range: 12 VDC
  • Current Draw: 85 mA Nom, 120mA Max
  • Size: 6" x 3.25" x 1" H
  • Warranty: 2-Year Limited