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Smoke, Fire & Gas Detection FAQs

Which smoke alarm has a relay contact to connect to a GSM dialler?

For a hardwired connection throughout the property, the Ei128R 5A relay base and Ei128RBU 5A relay with backup battery from Aico / Ei Electronics work in conjunction with the Ei140 series (alkaline backup) and Ei3000 series (lithium backup) mains-powered smoke, heat, and combination alarms. The alarms must be interlinked to the relay via a wired connection but can be installed directly on top of the relay to "hide" it, or separately from the relay if the location of the alarm is not a convenient place to connect with the GSM dialer.

If a wired connection between the relay and alarm is not feasible or desirable, but mains power is available, any RadioLINK-capable alarm from Aico or Ei Electronics such as the Ei600RF battery-powered series, Ei140RF mains-powered series with alkaline backup using the Ei168RC radio base, or Ei3000RF mains-powered series with lithium backup using the Ei3000MRF radio module can be wirelessly connected with the Ei428 radio-interlink relay with backup battery instead. The Ei428 still needs its own mains power feed, but does not need a direct hardwire connection to any alarm, making installation much more flexible.

Please Note: If you want the GSM dialler to operate during mains power failures it would need its own backup power source, and you must use either the Ei128RBU or Ei428 relays which also have their own backup batteries.

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Reviewed: 14/09/2023 (doc:536 V1.0). Our articles are reviewed regularly. However, any changes made to standards or legislation following the review date will not have been considered. Please note that we provide abridged, easy-to-understand guidance. To make detailed decisions about your fire safety provisions, you might require further advice or need to consult the full standards and legislation.

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