Planning the Installation
Page 15
Figure 2. FSL Connections (using 2k2 and 4k7 resistors)
The End-of-Line (EOL) and alarm contact resistors can be any of the following values
(respectively): 2k2 and 4k7, 1k and 1k, 2k2 and 2k2, or 4k7 and 4k7. The resistance bands
for FSL are as shown in Table 3.
Table 3: FSL Resistor Bands (without Masking)
Zone State
2k2/4k7 FSL
1k/1k FSL
2k2/2k2 FSL
4k7/4k7 FSL
Tamper
0k0
– 1k759
0k0 - 0k799
0k0
– 1k759
0k0
– 3k759
Normal
1k76
– 4k08
0k8 - 1k4
1k76 - 3k08
3k76 - 6k58
Alarm
4k081
– 8k28
1k401 - 2k4
3k081 - 5k28
6k581 - 11k28
Tamper
> 8k28
>2k4
>5k28
>11k28
If a detector is able to report masking, connect the detector as shown in Figure 3. The
detector must signal masking by closing both the Alarm and Fault contacts together. If the
detector closes the Fault contact only, the control unit reports this as a detector fault.
Figure 3. FSL Connections with Masking
4-wire CC
This uses a separate pair of wires for the alarm and tamper contacts. No end-of-line
resistors are used. Selecting 4-wire CC may halve the maximum number of wired zones
the device supports, as shown in Table 4.
An ADP-10CC board can be fitted to the control unit to convert the ten FSL zones (if
available) to ten 4-wire CC zones. Without the board fitted, the control unit supports five
4-wire CC zones. If you are using an ADP-10CC board, select 2-wire FSL 2k2/4k7 as the
wiring type.
EOL
Alarm
Tamper
Alarm
Tamper
Fault/trouble
EOL
Tamper
Tamper
Mask
Alarm
Fault
Normal