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Figure 8: Wiring diagram of a 2-wire connection
A) Isolators;
B) Compatible analogue devices (Fire detector, Input modules, Output modules, Manual callpoints);
C) T connection.
Connecting repeater FC500
For an example of how to connect two FC500 repeaters,
see Figure 10.The RS485 port of the FC503, terminals
[GND], [A], [B] and [24V], accepts up to eight FC500
repeaters. Terminals [A] and [B] supply the power (27.6 V)
to the repeater panels.
When a mains fault occurs, the repeaters decrease the
absorbed power, switching off the LCD display
backlighting; by pressing a key, the LCD display
backlighting switches on again for 20 seconds. However,
the absorption of the repeaters continues to run down the
backup batteries and decrease the stand-by supply time of
the system.
As there is only one control panel in the system, it must
supply the repeaters with power, unless a power supply
station is in the system.
Use only shielded cable, with one end connected to the
earth terminal of the control panel and other left free;
secure the continuity between several segments of
connection.
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