496339 Issue 4
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Wiring FSL Detectors
Each FSL zone is a ‘Fully Supervised Loop’ using a two wire closed loop.
The loop uses two resistors of different values to differentiate between
‘Circuit’ and ‘Tamper’ signals: a 2K2 (2.2K
W
) resistor fitted in series at the
end of the wired loop (EOL-End-Of-Line), and a 4K7 (4.7K
W
) resistor fitted
across the alarm contact, see Figure 6.
2k2 EOL
4k7
Zone 1
CCT
Alarm contacts
Tamper Loop
Figure 6. Connections for Single Alarm Contacts and Tamper Wiring.
Wiring External Sounders
Figure 7 shows the connections for a typical external sounder (SAB). O/P1 is
permanently programmed as a Bell output. Use Menu 51 in Installer program-
ming mode to select normally energised or normally de-energised, and to
program a Strobe output. Use Menu 56 to select type of tamper return.
If the cable to the external sounder is longer than 50m then some makes of
sounder may cause a tamper when activated. To overcome this problem
double up the wires between the -ve Hold Off on the sounder and the Aux -ve
connection on the panel. If more than one external sounder is being con-
nected, then consult the sounder manufacturer on how to wire the tamper
return circuit.
Bell
-ve Tamper Return
EOL 2k2 resistor**
-ve Hold Off
+ve Hold Off
-ve Apply trig
-ve Remove trig
-ve Strobe O/P
A/T
Aux +ve
Aux -ve
OP1
OP2
OP1: Relay
Normally
De-energized *
OP2: Relay
Normally
De-energised
End Station
Typical SAB
Bell
Strobe
* Factory default energised.
Note: Leave disconnected if
EOL method is being used.
** If present use Menu 56 to
specify EOL tamper return,
otherwise leave disconnected.
Figure 7. External/Internal Sounder Connection
8136
Wiring FSL Detectors
Summary of Contents for 8136UK-50
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