Man-1078_Sigma_CP_22
Page 11 of 24
+
-
Z
O
N
E
+
IN
+
OUT
-
IN
-
OUT
DETECTOR
CALL POINT
6K8 END OF
LINE RESISTOR
+
-
Z
O
N
E
+
IN
+
OUT
-
IN
-
OUT
DETECTOR
CALL POINT
6K8 END OF
LINE RESISTOR
POLARISED
SOUNDER
IN
OUT
+
IN
+
OUT
_
_
NOTE: SOUNDER WIRED IN
REVERSE POLARITY
USE ONLY SA-WIRE BASES
ON “T” SERIES PANELS
Figure 4.
– K Series detection zone wiring
Figure 5. - T series detection zone wiring
7B
8. Detection zone wiring
The detection zones provide a nominal 24V DC to power conventional detectors and call points as listed in
the compatibility tables on pages 6 and 7.
The wiring is monitored for open and short circuit fault conditions by removing the 6K8 end of line
monitoring resistors that are supplied fitted to the control panels’ terminals and placing them across the last
device that is wired to the zone circuit.
Detection zone circuits must be wired as a single, radial circuit with no spurs or T junctions to enable the
monitoring circuit to work correctly.
On T series panels, polarised sounders must also be wired across the detection zone but in reverse polarity
to that shown by the zone terminals (see figure 5 below). At least one sounder should be fitted to each
detection zone. Each zone can be configured individually as a 2-wire type zone or a non 2-wire type zone
using configuration options C1 to C8.
For non 2-wire systems that are required to comply with BS5839 Part 1: 2002 detector removal
requirements, detector bases fitted with a Schottky diode should be used and the end of line resistor
replaced with an LCMU active end of line monitoring device.
Summary of Contents for Sigma CP K Series
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