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Wire Requirements
Appendix F
T-tapping of the SLC loop wiring is allowed for 2-wire (Style 4) configurations. The total resistance of any branch
cannot exceed 40 ohms. The total wire length of all branches cannot exceed 10,000 feet (3,000 m).
Connecting external system accessories to the MS-9200 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 for each MS-9200 circuit.
Reference the chart below to specify wire requirements and limitations for each MS-9200 circuit.
Note: If the SLC loop is to be run in conduit with Notification Appliance Circuits, the risk of encountering problems
can be greatly reduced by exclusively employing electronic sounders (such as MA/SS-24D) instead of more electron-
ically noisy notification appliances such as electromechanical bells or horns.
MS-9200 Wire Specifications
TABLE F-1:
CIRCUIT CONNECTIONS
Circuit Type
SLC loop
(power-limited)
EIA-485
(power-limited)
EIA-232
(power-limited)
M300 and
M301
(power-limited)
M302
(power-limited)
C304
(power-limited)
24 VDC
filtered
resettable and
nonresettable
(power-limited)
24 VDC
nonregulated
(power-limited)
CHG-120F
1. When using untwisted, unshielded wire, full conduit is recommended for optimum EMI/RFI protection.
98
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Wire Requirements
Circuit
Wire Type and
Function
Limitations
Twisted, shielded pair, 40
ohms maximum per length
Connects to
of Style 6 and 7 loops. 40
Addressable
ohms per branch maxi-
Devices
mum for Style 4 loops
Untwisted, unshielded pair
Connects to
Twisted, shielded pair with
annunciator
a characteristic impedance
modules
of 120 ohms
PIM-24 output
connects to
Twisted, shielded pair
remote printer
and PC computer
Maximum loop wire resis-
Initiating Device
tance is 40 ohms for the
Circuit
M300 and 20 ohms for the
M301
No more than a 2.4 volt
Initiating Device
drop allowed at end of cir-
Circuit
cuit. Maximum loop wire
resistance is 25 ohms
Notification
In alarm, no more than a
Appliance
1.2 volt drop allowed at
Circuit
end of circuit
Connects to
No more than 1.2 volt drop
annunciators
allowed from supply
and other
source to end of any
accessories
branch
Connects to
No more than 1.2 volt drop
C304 control
allowed from supply
modules and
source to end of any
accessories
branch
Remote second-
12 AWG (3.25 mm
ary power source
conduit
firealarmresources.com
WIRE REQUIREMENTS
Recommended
Max. Distance
Feet (meters)
10,000 (3,000 m)
8,000 (2,400 m)
4,875 (1,450 m)
3,225 (980 m)
1
1,000 (300 m)
6,000 (1,800 m)
50 (15 m)
2,500 (760 m)
2,500 (760 m)
Distance limitation
set by 1.2 volt maxi-
mum line drop
Distance limitation
set by 1.2 volt maxi-
mum line drop
Distance limitation
set by 1.2 volt maxi-
mum line drop
2
) in
20 (6 m)
Document #15668
Rev.I
04/20/98
P/N 15668:I
Wire Gauge and Compatible Brands
2
12 AWG (3.25 mm
): Genesis 4410,
Signal 98230, Belden 9583, WPW999
2
14 AWG (2.00 mm
):Genesis 4408 & 4608
Signal 98430, Belden 9581, WPW995
2
16 AWG (1.30 mm
):Genesis 4406 & 4606
Signal 98630, Belden 9575, WPW991
2
18 AWG (0.75 mm
):Genesis 4402 & 4602
Signal 98300, Belden 9574, WPW975
2
12-18 AWG (3.25 - 0.75 mm
)
2
18 AWG (0.75 mm
)
2
18 AWG (0.75 mm
) minimum
2
12-18 AWG (3.25 - 0.75 mm
)
2
12-18 AWG (3.25 - 0.75 mm
)
2
12-18 AWG (3.25 - 0.75 mm
)
2
12-18 AWG (3.25 - 0.75 mm
)
2
12-18 AWG (3.25 - 0.75 mm
)
2
12-18 AWG (3.25 - 0.75 mm
)
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