Fire-Lite Alarms MS-9200E Programming, Installation, Maintenance And Operating Instruction Manual page 33

Wiring the Signaling Line Circuit
Shielded Wire Termination Requirements
Shielded wire is recommended for use on the SLC loop, EIA-485 and EIA-232 circuits (refer to "Wire Requirements"
on page 99, for additional wiring information). Proper termination of the shield is shown below for various applica-
tions such as no conduit, partial conduit and full conduit. Nonshielded wire may be used on the SLC loop, however,
the maximum length should not exceed 1,000 feet (300 m) and full conduit is recommended for optimum EMI and
RFI protection.
Shield Termination in No Conduit
FIGURE 2-14:
Shield Drain Wire
Shield Termination in Full Conduit
FIGURE 2-15:
MS-9200 Cabinet
Shield Termination in Partial Conduit
FIGURE 2-16:
Shield Drain Wire
Nonshielded wire
MS-9200 Cabinet
The shield must not be connected
to earth ground at any point.
Shield Drain Wire
Note: Metal conduit and a metal box
must be employed.
MS-9200 Cabinet
Document #50428
All Styles of Wiring
SLC Loop +
Do not allow the shield drain wire to
enter the system cabinet. Connect the
drain wire to the outside of the cabinet
SLC Loop - via a BX-type connector.
SLC Loop +
SLC Loop -
Shield
All Styles of Wiring
Do not allow the shield drain wire to
enter the system cabinet or the conduit.
Connect the drain wire to the termination
point of the conduit run (such as a single-
gang box as illustrated in Figure 2-16.
The conduit cannot be longer than 20 feet
(6 m).
SLC Loop +
SLC Loop -
Rev. C1 2/15/99 P/N 50428:C1
All Styles of Wiring
The shield drain wire must
be connected to the shield
terminal TB6, Terminal 1 or
2. Do not allow the shield
drain wire or the shield foil
to touch the system cabi-
net. For Style 6 or 7,
connect only one end of the
shield to TB6.
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