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Veritas R8 Plus & Excel Installation Manual
End Of Line Technology
Those already familiar with End of Line (EOL) Technology
(sometimes referred to as Balanced Zones) may wish to skip this
section.
End of Line Resistance is a technique which, by adding resistance
at the last detector in the loop, provides each loop with its own 24
hour tamper protection.
The panel can use two different types of EOL resistors, traditional
Texecom 4K7/2K2, or Veritas values 10K/22K/33K. See page 28
for programming details.
10K/22K/33K
The panel can distinguish up to four possible states; low
resistance (10k) is interpreted as zone clear, high resistance
(33k) is interpreted as zone in fault. Short circuit may optionally
be interpreted as tampering or zone clear. Open circuit may
optionally be interpreted as tampering or zone in fault.
Resistors are coded with coloured bands to identify the different
values, as follows:
Resistor Colour Code
Brown, Black, Orange, Brown
10k
22k
Red, Red, Orange, Brown
Orange, Orange, Orange, Brown
33k
Thus there are four possible configurations depending on the
options selected. These include normally closed operation (a
Global
System
Tamper
progressively more secure, as follows:
The control panel is supplied with links fitted across the eight zones
(Z1 - Z8), the Global System Tamper (TAMP) and Bell Tamper (SAB
C, D) to simulate closed circuits.
These links are removed during installation as each zone is
connected.
The Global System Tamper zone will typically only be used with
normally closed operation.
If a zone is not required then the link should be left in place.
If EOL operation is selected and a zone is not required then the zone
link should be replaced with a 10K resistor (supplied).
When wiring a 24 Hour zone (Fire, PA and Tamper), such as a panic
button, it may be more convenient to fit the EOL resistor(s) in the
panel than in the detector.
Figure 3 - EOL Wiring
Miscellaneous Option 3.2 (S/C = Tamper)
Miscellaneous Option 3.3 (O/C = Tamper)
ALARM
ZONE
Figure 3a - Normally Closed Operation.
Miscellaneous Option 3.2 (S/C = Tamper)
Miscellaneous Option 3.3 (O/C = Tamper)
INS045-14
zone
is
provided)
and
LID
TAMPER
Figure 3b - "American" Operation.
Miscellaneous Option 3.2 (S/C = Tamper)
Miscellaneous Option 3.3 (O/C = Tamper)
Figure 3c - "European" Operation (one detector
per zone).
Miscellaneous Option 3.2 (S/C = Tamper)
Miscellaneous Option 3.3 (O/C = Tamper)
become
Figure 3d - High Security Operation (one detector
per zone).
4K7/2k2
Zone 1
Off
Alarm
Off
E.O.L
Alarm
E.O.L
2k2
2 Normally
On
Closed Devices
Off
10K
ALARM
ZONE
33K
ALARM
LID
ZONE
22K
10K
ALARM
ZONE
Zone 1
Tamper
Alarm
Tamper
1 Normally
Closed Device
Installation
LID
Off
On
On
On
LID
Tamper
E.O.L
2k2
13
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