Ei420 Radio-Interlinked Relay Base for Carbon Monoxide Alarms
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230V Radio-Interlinked Relay Base for Carbon Monoxide Alarms EI261 and EI261D - Ei420

Discontinued Product

This product has been discontinued and is no longer available to buy.

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Product Overview
The Ei420 is a mains powered relay base with built-in lithium battery. The base is suitable for interconnecting carbon monoxide alarms into a radio-interlinked system.
  • Rechargeable 10 year lithium battery back-up
  • 5 year warranty
  • Hard-wire up to 12 EI261 alarms 
  • RF performance to EN 300220-3
  • EMC performance to EN 301489-3
  • Cover to allow remote siting 
  • Visual RF transmission indicator
  • RF frequency: 868Hz band 
  • Low battery indicator
  • Hard-wired input to connect Ei261 CO alarms to any Ei radio-interlinked system
  • Can be used as a stand alone repeater unit for Ei RadioLINK alarms and bases
  • RF range 150 metres (minimum) in free space and up to 30 metres in buildings
  • Digitally coded to avoid interference with neighbouring systems
  • Two way signaling (The unit will transmit a hard-wired signal upon detection of a radio signal and a radio signal upon detection of a hard-wired signal)
Technical Data

This is the technical data for the 230V Radio-Interlinked Relay Base for Carbon Monoxide Alarms EI261 and EI261D - Ei420.

Product Code EI420
Weight 0.18kg
Dimensions (HxDia) 26x140mm
Back-Up Battery Longlife Lithium Battery
Sound Output 85dB
Temperature Range 0 to 40C
Humidity Range 15% to 95% Relative Humidity

Data Sheets

FAQs (2)

Q. Where more than one radio-interlinked battery operated smoke alarm is installed, if the battery in one alarm failed would the other alarms be affected?

A. If one alarm was to malfunction the other units would not be affected, if it was due to alarm failure. If the fault was with the radio-interlinking signal, then all alarms that are in the chain after the faulty alarm would be affected and they would not go off.

Q. Are there any restrictions to the distance a radio-interlinked smoke alarm will work?

A. Most radio-interlinked alarms have a range of 150 meters in an open space and up to 30 meters in buildings. The thickness of the walls and partitions will affect the travel distance of the signal.

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