Wiring a Signaling Line Circuit (SLC)
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AFP-300/AFP-400 Installation PN 50253:C1 05/22/97 2-47
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Obtain Style 7 operation by using Isolator Bases (B524BI or B224BI) with each
detector flanking MMX modules with ISO-X modules (Figure 2-65). Wire-to-wire
shorts on the SLC do not prevent the control panel from receiving alarm signals.
Do not T-Tap or branch a Style 7 four-wire SLC. Ratings and characteristics are
identical to a NFPA Style 6 four-wire SLC. Table 2-20 shows connections between the
SLC and CPU terminal TB-5:
Table 2-20 SLC to CPU Connections
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Figure 2-65 shows typical wiring for a Style 7 SLC with ISO-X modules flanking
MMX modules:
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Connect... To CPU...
SLC Out TB5-1 (+)
TB5-3 (–)
SLC Return TB5-2 (+)
TB5-4 (–)
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