Planning the Installation
Page 10
Table 2: FSL Resistor Bands (without Masking)
If a detector is able to report masking, connect the detector as shown in Figure 2. 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 2. 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 halves the maximum number of wired zones the
device supports.
2-wire CC
This uses a single pair of wires for each detector. No end-of-line resistors are used.
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