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Extinguishing Panel - INSTRUCTION MANUAL
Detectors & sounders
Wiring the detectors
There are two types of detection zone on the Premier EX8 panel. The Co-incidence (Double-Knock)
zones for the extinguishing circuit uses common bases (no diode), and a 2.7k end of line resistor. Call
points can NOT be connected to these zones.
Zone -
Zone +
The Peripheral (fire alarm) zones use diode bases and a 100µF capacitor end of line. These zones
support head removal detection without cutting power to the rest of the zone. Call points can be
connected anywhere on these zones.
Zone -
Zone +
The diode (also known as a continuity diode) passes power to the downline detectors and call points,
if a detector head is removed for any reason.
Wiring the sounders
The Premier EX8 has 2 first stage / fire sounder circuits, each rated at 150mA. Each sounder circuit
must be fitted with a 10k end of line resistor. The EX8 also has 1 x second stage sounder circuit rated
at 250mA. This also uses a 10K end of line resistor. This second stage sounder circuit is designed for
an alarm device that gives a constant sound pattern (either sounder or bell) because it uses on/off
sound patterns to indicate different gas release conditions.
SND+
SND-
SOUNDER
- -
+
+
Approved Document No: GLT.MAN-124
Issue : 1
Author: NRPJ
SOUNDER
- -
+
+
Date: 15/11/2007
SOUNDER
SOUNDER
- -
- -
+
+
+
+
-
-
-
End of line
capacitor,
100uF.
-ve stripe to
zone -ve
10K
End of
Line Resistor
PAGE 15
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