adastra EN54-24 Loudspeakers Instructions
- June 12, 2024
- Adastra
Table of Contents
EN54-24 Loudspeakers Wiring Guide
EN54-24 Loudspeakers
Thank you for choosing Adastra loudspeakers as part of your EN54-24 compliant
public address system. Please follow the guidance below for connecting these
speaker units to your amplifier for correct operation and to maintain function
in an emergency scenario.
EN54-24 compliance relates to public address systems that can operate in fire-
related emergency situations and dictates that a sound system remains intact
to enable public announcements for emergency information and evacuation
instructions.
Adastra speaker units that are EN54-24 compliant have a heat-resistant ceramic
terminal block for connection to the amplifier and this may also be fitted
with a thermal fuse. For EN54-24 compliance, the amplifier must be connected
through the fuse so that if a speaker unit becomes compromised by fire damage,
the fuse will fail and avoid any short-circuit through the
damaged speaker (which can damage the amplifier).
The terminal block for EN54-24 horn speakers is provided in a separate fire-
resistant junction box, hardwired to the speaker as shown opposite. A choice
of FUSED or NOT FUSED connection is available. You must use FUSED connection
for EN54-24 compliance. For column speakers, the terminal block is inside the
column housing. Remove the lower cover of the column speaker by unfastening
the 2 screws either side of the cable entry gland. Connect to the terminals in
the same way as for horn speakers.
For ceiling speakers, the ceramic terminal block is located on the rear
(upper) side of the speaker basket. Again, connect the input via the thermal
fuse if one is fitted.
Ensure all connections are firmly secured and that there are no loose or
shorted connections.
Disposal: The “Crossed Wheelie Bin” symbol on the product means that the
product is classed as Electrical or Electronic equipment and should not be
disposed with other household or commercial waste at the end of its useful
life. The goods must be disposed of according to your local council
guidelines.
Errors and omissions excepted.
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