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ELK Alarm Engine Output Expander


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Increase the Number of Outputs in Your ELK E27 Network

Support more alarm outputs in your ELK E27 security network with the ELK Alarm Engine 8 Relay Output Expander! This expansion module provides 8 additional relay outputs for the ELK E27 Alarm Engine security and automation network. Up to 3 zone expanders may be connected to a single ELK-E27CB, increasing the total zone outputs to 32. 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.

  • Output expander includes 8 Form "C" Relay Hardwired Outputs
  • Operates on 4-Wire Data Bus connections
  • Status and Diagnostic LEDs offer local visual alerts
  • On-Board EOL Bus Termination Jumper and Plug-In Terminal Strips
  • Option for Vertical Mounting using ELK-SWG Glides (included)


  • 8 Relay Output Expander
  • (2) ELK-SWG Circuit Board Mounting Glides
  • 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-AEXOU
  • UPC: 762158570032
  • Relay Outputs: Plug-In Terminals with Elevator Style Wire Clamps and Screws
  • Relay Contact Rating: 7 Amps @28VDC, 10 Amps @125VAC
  • Operating Power Range: 12 VDC
  • Current Draw: 35 mA Nom, 330mA Max
  • Size: 6" x 3.25" x 1" H
  • Warranty: 2-Year Limited