Honeywell 13270-01LB Data, Installation And Commissioning Manual page 3

Fire Panels
Alarm (Sounder circuits)
To comply with the requirements
of BS 5839: Part 1:2002 +
A2:2008, two or more alarm
sounder circuits should be used
on all installations.
NOTE: All sounder circuits
(sectors) will operate together in
the event of a fire condition.
NOTE: Each sounder output is
0.5A maximum protected by
0.75A fuse.
1 & 2 Zone 4 & 8 Zone
Panels Panels
1A maximum 1.5A maximum
Alarm sounder Alarm sounder
load per panel load per panel
The load must be shared between
the sounder circuits. The alarm
sounder circuits are regularly
pulse monitored for failure. It is
important that the last alarm
sounder is fitted with a 10K Ohm
end-of-line resistor.
The sounder outputs are
monitored in alarm for loss of
supply or multiple sounder output
overloads
Where a sounder circuit is not
being used, the end-of-line resistor
must be fitted across its terminals
in the control panel.
Class Change
A pair of unmonitored terminals
allow only the system alarm
sounders to be activated from a
remote position. It is considered that
the major use for these will be for
class change functions in schools
and colleges.
Auxiliary Contacts
These are normally open (NO) and
normally closed (NC) contacts that
change over when the panel goes
into a fire condition. The contacts
are rated at 24V dc 1A for a
resistive load and should not be
used to switch voltages in excess of
50V. The auxiliary circuits should be
powered from an independent
power supply.
4188-424 issue 4_Part 1_10-09
End of line Resistor
10k Ohms
Alarm sounders
must be polarised
and suppressed.
Alarm sounder
must have a
series blocking
diode
S1+
Control panel
Figure 3 Alarm sounder circuit used and unused
Push button switch
or relay pulsed
interval (minimum)
for class change
Figure 4 Class change circuit
NOTE:There is no
indication given at the
panel of class change push
button operation.
3
NOTE: Spur wiring is not permitted
off alarm sounder
ALARM SOUNDER CIRCUIT
Sounder circuit that is
not used is terminated
with an end-of line resistor
S1- Sn+ Sn-
Sounder
Sounder
at 1 second
application
CC1 C 2
Class change
Control panel
Contacts rated 1A@24Vdc
Auxiliary
contacts
Control panel
Figure 5 Auxiliary contacts
System design
circuits.
Earth
continuity
Sn+
Sounder
Control panel
100m max.
Cable
distance
C
100m maximum
cable distance
Contacts
change
over occur
with a fire
condition