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Wire Requirements
Appendix B
Connecting external system accessories to the MS-2410BC main circuits must be carefully considered to ensure
proper operation. It is important to use the correct type of wire, wire gauge and wire run length per each MS-2410BC
circuit. Reference the chart below to specify wire requirements and limitations for each MS-2410BC.
Wire Requirements
TABLE B-1:
CIRCUIT CONNECTIONS
CIRCUIT TYPE
Initiating Device
Circuit
EIA-485
LED-10IM Inter-
face Module
24 VDC resettable,
nonresettable
54
Wire Requirements
CIRCUIT
WIRE TYPE AND
FUNCTION
LIMITATIONS
Untwisted, unshielded wire
Connects to
Initiating Devices
(Do not exceed 100 ohms)
Connects to
Twisted, shielded pair with a
annunciator
characteristic impedance of
modules and relay
120 ohms
module
Connects to
No more than 1.2 volt drop
annunciators and
allowed from supply source
other accessories
to end of any branch
Document #50801
WIRE REQUIREMENTS
RECOMMENDED
MAX. DISTANCE
Feet (meters)
12 AWG (3.25 mm
10,000 (3,000 m)
14 AWG (2.00 mm
8,000 (2,400 m)
4,875 (1,480 m)
16 AWG (1.30 mm
3,225 (975 m)
18 AWG (0.75 mm
6,000 (1,800 m)
Distance limitation
12 AWG (3.25 mm
set by 1.2 volt maxi-
mum line drop
Rev.B
8/17/98
P/N 50801:B
WIRE GUAGE
2
) Belden 9583
WPW999
2
) Belden 9581
WPW995
2
) Belden 9575
WPW991
2
) Belden 9574
WPW975
2
18 AWG (0.75 mm
)
2
) - 18 AWG
2
(0.75 mm
)
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