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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
Circuit Type
Function
Connects to
SLC loop
Addressable
(power-limited)
Devices
Connects to
EIA-485
annunciator
(power-limited)
modules
PIM-24 output
EIA-232
connects to
(power-limited)
remote printer
and PC computer
M300 and
Initiating Device
M301
Circuit
(power-limited)
M302
Initiating Device
(power-limited)
Circuit
Notification
C304
Appliance
(power-limited)
Circuit
24 VDC
Connects to
filtered
annunciators and
resettable and
other
nonresettable
accessories
(power-limited)
Connects to
24 VDC
C304 control
nonregulated
modules and
(power-limited)
accessories
Remote second-
CHG-120F
ary power source
1. When using untwisted, unshielded wire, full conduit is recommended for optimum EMI/RFI protection.
Wire Requirements
Wire Type and
Limitations
Twisted, shielded pair, 40
ohms maximum per length
of Style 6 and 7 loops. 40
ohms per branch maxi-
1
mum for Style 4 loops
Untwisted, unshielded pair
Twisted, shielded pair with
a characteristic impedance
of 120 ohms
Twisted, shielded pair
Maximum loop wire resis-
tance is 40 ohms for the
M300 and 20 ohms for the
M301
No more than a 2.4 volt
drop allowed at end of cir-
cuit. Maximum loop wire
resistance is 25 ohms
In alarm, no more than a
1.2 volt drop allowed at
end of circuit
No more than 1.2 volt drop
allowed from supply
source to end of any
branch
No more than 1.2 volt drop
allowed from supply
source to end of any
branch
2
12 AWG (3.25 mm
) in
conduit
Document #50428
WIRE REQUIREMENTS
Recommended
Max. Distance
Feet (meters)
Wire Gauge and Compatible Brands
12 AWG (3.25 mm
Signal 98230, Belden 9583, WPW999
10,000 (3,000 m)
14 AWG (2.00 mm
8,000 (2,400 m)
Signal 98430, Belden 9581, WPW995
4,875 (1,450 m)
16 AWG (1.30 mm
3,225 (980 m)
Signal 98630, Belden 9575, WPW991
18 AWG (0.75 mm
Signal 98300, Belden 9574, WPW975
1,000 (300 m)
12-18 AWG (3.25 - 0.75 mm
6,000 (1,800 m)
18 AWG (0.75 mm
50 (15 m)
18 AWG (0.75 mm
2,500 (760 m)
12-18 AWG (3.25 - 0.75 mm
2,500 (760 m)
12-18 AWG (3.25 - 0.75 mm
Distance limitation
set by 1.2 volt maxi-
12-18 AWG (3.25 - 0.75 mm
mum line drop
Distance limitation
set by 1.2 volt maxi-
12-18 AWG (3.25 - 0.75 mm
mum line drop
Distance limitation
set by 1.2 volt maxi-
12-18 AWG (3.25 - 0.75 mm
mum line drop
20 (6 m)
12-18 AWG (3.25 - 0.75 mm
Rev. C1
2/15/99
P/N 50428:C1
2
): Genesis 4410,
2
):Genesis 4408 & 4608
2
):Genesis 4406 & 4606
2
):Genesis 4402 & 4602
2
)
2
)
2
) minimum
2
)
2
)
2
)
2
)
2
)
2
)
99
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