TS790+ & TS900+ Installation Manual
System Installation
15
Figure 14. Double Pole Wiring
End Of Line
The EOL method requires the following:
The detector alarm contacts must have a 4K7
shunt resistor fitted.
A 2K2 End of Line (EOL) resistor must be fitted at
the point in the circuit furthest from the
control panel.
Loop resistance with the EOL resistor shorted
must be less than 100 Ohms.
The maximum number of detection devices
allowed in a circuit is ten.
Normally open devices such as pressure pads
and exit terminator buttons are connected
across outer terminals
If the detection circuit is not used links can be
fitted across the zone and tamper loops or
programmed as Not Used.
Figure 15. End of Line Wiring
External Sounder Connections
The following terminals have been provided to
allow connections to an external sounder:
H/O -
This is used to provide a permanent -ve
hold off to external sounders, strobes
etc.
H/O
+
This is used to provide a perve
hold off to external sounders, strobes
etc. It is protected by a 1 Amp fuse (Bell
12V).
TR -
This is the negative tamper return
connection from the siren or bell.
STB -
This is the strobe output which will switch
to 0V on alarm and is rated at 500mA.
Connect the other side of the strobe to
the H/O +.
TRG -
This is the bell trigger output which will
switch to 0V on alarm and is rated at
500mA. This output can be
programmed for SAB or SCB operation,
as follows:
SAB:
TRG - will switch to 0V on alarm
and will provide a maximum of 500mA.
SCB:
TRG - will provide a negative hold
off (500mA), which is removed on alarm.
