RADIOLINK RELAY
FOR USE WITH EI168, 405, 405TY & 3105RF
Instruction Manual
MODEL Ei428
Contains vital information on the products operation and
installation. Read and retain carefully. If you are just installing
this product the manual MUST be given to the householder.
1. Introduction
The Ei428 RadioLINK Relay Module is a device that switches
a relay upon receipt of an alarm signal from a suitable Ei
smoke/heat alarm. The electrically isolated contacts can be
used for many applications such as signalling, turning on
lights, etc. The Ei428 is designed to operate with Ei
RadioLINK products (Ei168, 405, 405TY, 407, 410, 411 &
3105RF).
The Ei428 RadioLINK Relay Module is powered by the
230VAC mains and has rechargeable back-up cells. As sup-
plied the relay operates continuously (i.e. it switches when
one of the smoke / heat alarms detects fire and switches back
when the smoke clears). When the slide switch is moved to
the pulse ‘P’ position (see figure 1b) the relay will switch when
fire is detected but will automatically switch back after 5 sec-
onds. This is commonly used with warden call systems where
only momentary short circuit signalling is required.
2. Installation
WARNING: Mains powered Ei428 RadioLINK Relay modules
should be installed by a qualified electrician in accordance
with the Regulations for Electrical Installations published by
the Institution of Electrical Engineers (UK) (i.e. BS7671)
Failure to install the unit correctly may expose the user to
shock or fire hazards. This unit is not waterproof and must not
be exposed to dripping or splashing.
1. Choose a suitable mounting position near the mains supply
and the device to be connected to the relay. Keep it away
from metal surfaces or large metal objects (e.g. water cylin-
der, fuse boards) which can reduce the RF signal range.
2. Disconnect the AC mains supply from the circuit that is
going to be used.
3. Where the incoming wiring is on the surface of the ceiling,
the appropriately sized trunking / conduit must be chosen to
mate with the unit. Use a sharp knife to remove the material
1
Model: Ei 428
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