Extinguishing Panel - INSTRUCTION MANUAL
Approved Document No: GLT.MAN-124
PAGE 15
Issue : 1 Author: NRPJ Date: 15/11/2007
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.
L1I
N
L1O
UT
EA
RTH
L2
-R
L1I
N
L1O
UT
EA
RTH
L2
-R
L1I
N
L1O
UT
EA
RTH
L2
-R
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.
L1
IN
L1O
UT
EA
R
TH
L2
-R
L1
IN
L1O
UT
EA
R
TH
L2
-R
L1
IN
L1O
UT
EA
R
TH
L2
-R
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
SOUNDER
+
- -
+
SOUNDER
+
- -
+
SOUNDER
10K
End of
Line Resistor
End of line
capacitor,
100uF.
-ve stripe to
zone -ve
