EQUIPMENT: FIRECLASS DUO -CEL WRITTEN BY: RKP
PUBLICATION: OM_FC_DUO-CEL_INST CHECKED BY: AP
ISSUE No. & DATE: 0 01/03/12
PAGE 9 of 29
2.9 Panel to Repeater Wiring
The Repeater RS485 communication and 24Vdc
power connections should all be made via a single
multi-core data cable. The number of cores
required is two if the repeater is mains powered, or
four if powered from the panel. A cable screen is
not required but is usually present in most data
cable types. The A & B lines should be connected
via one set of twisted pair cores, the 24V & 0V lines
should be connected via another set of twisted pair
cores.
If the cable includes a screen then this should be
earthed at the panel & all repeaters.
Terminal A at the panel must be connected to
Terminal A at all repeaters, Terminal B at the panel
must be connected to Terminal B at all repeaters.
Figure 11 – Repeater Wiring Diagram
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