Document #51003 Rev.E 01/11/02 P/N 51003:E
83
Wire Requirements
Appendix F
Wire Requirements
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.
TABLE F-1:
MS-9200 Wire Specifications
CIRCUIT CONNECTIONS
WIRE REQUIREMENTS
Circuit
Type
Circuit
Function
Wire Type and
Limitations
Recommended
Max. Distance
Feet (meters)
Wire Gauge and Compatible Brands
SLC loop
(power-limited)
Connects to
Addressable
Devices
Twisted, shielded pair, 40
ohms maximum per length
of Style 6 and 7 loops. 40
ohms per branch maxi-
mum for Style 4 loops
1
1. When using untwisted, unshielded wire, full conduit is recommended for optimum EMI/RFI protection.
10,000 (3,000 m)
8,000 (2,400 m)
4,875 (1,450 m)
3,225 (980 m)
12 AWG (3.25 mm
2
): Genesis 4410,
Signal 98230, Belden 9583, WPW999
14 AWG (2.00 mm
2
):Genesis 4408 & 4608
Signal 98430, Belden 9581, WPW995
16 AWG (1.30 mm
2
):Genesis 4406 & 4606
Signal 98630, Belden 9575, WPW991
18 AWG (0.75 mm
2
):Genesis 4402 & 4602
Signal 98300, Belden 9574, WPW975
Untwisted, unshielded pair
1,000 (300 m)
12-18 AWG (3.25 - 0.75 mm
2
)
ACS (EIA-485)
(power-limited)
Connects to
annunciator
modules
Twisted, shielded pair with
a characteristic impedance
of 120 ohms
6,000 (1,800 m)
18 AWG (0.75 mm
2
)
TERM
(EIA-232)
(power-limited)
connects to
remote printer
and PC computer
Twisted, shielded pair
50 (15 m)
18 AWG (0.75 mm
2
) minimum
MMF-300 and
MMF-301
(power-limited)
Initiating Device
Circuit
Maximum loop wire resis-
tance is 40 ohms for the
MMF-300 and 20 ohms
for the MMF-301
2,500 (760 m)
12-18 AWG (3.25 - 0.75 mm
2
)
MMF-302
(power-limited)
Initiating Device
Circuit
No more than a 2.4 volt
drop allowed at end of cir-
cuit. Maximum loop wire
resistance is 25 ohms
2,500 (760 m)
12-18 AWG (3.25 - 0.75 mm
2
)
CMF-300
(power-limited)
Notification
Appliance
Circuit
In alarm, no more than a
1.2 volt drop allowed at
end of circuit
Distance limitation
set by 1.2 volt maxi-
mum line drop
12-18 AWG (3.25 - 0.75 mm
2
)
24 VDC
filtered
resettable and
nonresettable
(power-limited)
Connects to
annunciators and
other
accessories
No more than 1.2 volt drop
allowed from supply
source to end of any
branch
Distance limitation
set by 1.2 volt maxi-
mum line drop
12-18 AWG (3.25 - 0.75 mm
2
)
24 VDC
nonregulated
(power-limited)
Connects to
CMF-300 con-
trol modules and
accessories
No more than 1.2 volt drop
allowed from supply
source to end of any
branch
Distance limitation
set by 1.2 volt maxi-
mum line drop
12-18 AWG (3.25 - 0.75 mm
2
)
CHG-120F
Remote second-
ary power source
12 AWG (3.25 mm
2
) in
conduit
20 (6 m)
12-18 AWG (3.25 - 0.75 mm
2
)