Notifier ID50 Installation, Commissioning & Configuration Manual page 34

ID50 Series Panel - Installation, Commissioning & Configuration Manual
EN54-2 : 7.7.1
Always configure one
output as a monitored
sounder circuit to ensure
EN54 compliance
997-263, Issue 4
September 2002
4.4.4 Sounder Circuit Outputs
Before the sounder circuits are connected it is
recommended that all detection circuits have been
checked and that there is no 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 6k8 end-of-
line resistors. Perform the following checks:
1 Use a low-voltage 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 6k8.
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 resistance appears correct, the following
be done:
i Remove the 6k8 resistors from the panel outputs.
ii Connect the circuit to the panel output while
observing correct polarity.
ii If there are any reversed devices the panel will then
indicate:
‘Sounder cct. n SHORT-CCT.’.
3 When the output circuits have been connected, they
may be tested using the ‘END DELAYS / EVACUATE’
pushbutton.
i Press the ‘END DELAYS / EVACUATE’ pushbutton
to activate the Output circuits.
ii Press the ‘SILENCE/RESOUND’ pushbutton to
silence all activated output circuits.
iii If the outputs operated correctly press the ‘RESET’
pushbutton. If not, check all possible causes and
correct any faults that exist, then repeat Step 3.
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