NFS Supra
Page 30
HLS-MN-025 v.04
Installation and Operating Manual
www.honeywelllifesafety.es
www.hoeywelllifesafety.es
4.4.2 Sounder Circuits
The NFS Supra control panel provides two independent, monitored sounder outputs. Sounder
circuit wirings must be separated from other cables.
There are some local requirements for Notification appliance Circuits. Sounder circuits must be
fire resistant according to EN54-14.
Sounder circuits must be wired as a single circuit with no spurs or T-junctions
to ensure the correct operation of the monitoring function (see figures on the right).
Moreover, an EOL diode (1N4007 or
4K7 Ω resistor) (see figure) must be installed
after the last sounder.
Both sounders outputs circuits should have an EOL, even if is not used.
The system reverts polarity of output in standby due to sounders consumption in standby.
Each sounder circuit supports
a maximum of 250mA
when activated
, protected by resettable
electronic fuse. Check the devices loads in order not exceed the maximum allowed. Refer to
Specifications section.
Connect the circuit to the panel output while observing correct polarity. When sounders without
polarity are used, a polarity diode must be used in the power supply of each sounder in the
current way and another in parallel to the sounder in reverse current way, see drawing.
To
avoid false alarms, do not connect sounders until all connections are terminated.
The sounders can be tested by using, the Evacuate push-button form level 2.
Sounders will turn on. Press the push-button again to silence sounders.
Any fire in any zone activates sounders by default, but sounders may be configured to be
activated by zone with delays. Refer to Configuration section in this manual.
EOL Diode
Sounder with polarity
Sounder without polarity
SOUNDER CIRCUIT
1N1004 Diode or 4K7
Ω Resistor
S
o
u
n
d
e
r
C
irc
u
it
Installation
