997-492-000-5, Issue 5
June 2009
22
EN 54 & ISO 7240 2-8 Zone Conventional Fire Panel - Installation & Configuration Manual
6.8 Sounder Circuits
Two sounder output circuits are provided. The
termination block, TB1, for the sounder circuits is located
at the top left-hand corner of the PSU PCB.
DO NOT CONNECT UNTIL ALL ZONES HAVE BEEN
CONFIGURED AND TESTED.
Before the sounder circuits are connected it is
recommended that all detection circuits are checked to
prevent the possibility of spurious alarm conditions being
generated. The sounders should be polarized and
suppressed using IN4002 (or similar) diodes and the
circuits should be fitted with 4k7 end-of-line resistors.
Each of the two circuits can be configured as a Sounder
output, a Fire routing output or a Fault output. Refer to
Section 7 Configuration for details.
Refer to Section 7.6 Sounder Output Type/Delay for
restriction on the application of these sounder circuits.
1 Use a low-voltage, digital multimeter to check the
resistance across each of the sounder circuits:
i With the meter connected in reverse polarity (+ve to
-ve and -ve to +ve) the reading should be 4k7.
ii With the multimeter connected to the circuit in normal
polarity (+ve to +ve and -ve to -ve) the meter may
indicate a lower value. This is because of the forward-
biased diodes in series with the sounders.
2 If electronic sounders are used this test will not reveal
reversed devices. It is, therefore, recommended that
if the circuit appears correct the following is done:
i Remove the 4k7 resistors from the panel outputs.
ii Connect the circuit to the panel output while observing
correct polarity.
iii If there are any reversed devices the panel will indicate
a fault. Re-check circuit. Locate reversed sounder
wiring and correct. Panel fault indication will clear.
3 When the output circuits have been connected, they
may be tested by using the SOUNDERS START/
STOP pushbutton.
i Press the SOUNDERS START/ STOP pushbutton
to activate the sounders.
ii Press the SOUNDERS START/ STOP pushbutton
again to stop the activation of the sounders.
EN 54-2: 8.8 &
ISO 7240-2: 9.8
One output on the panel
must be configured as a
fault output.
!
EN54
ISO 7240
EN 54-2 &
ISO 7240-2 7.7.1
One output on the panel
must be configured as a
fire output.
!
EN54
ISO 7240
EN 54-13: 5.3.4
Installations designed to
meet EN 54-13 require
partial short and partial
open fault warning.
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