Planning the Installation
Page 15
Figure
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)
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
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.
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