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Wire Requirements
APPENDIX E
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-9050UD 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-9050UD circuit. Reference the charts below to specify wire
requirements and limitations for each MS-9050UD circuit.
SLC Loop Using Twisted, Unshielded Wire
While shielded wire is not required, it is recommended that all SLC wiring be twisted-pair to
minimize the effects of electrical interference. Use the following table to determine the specific
wiring requirements for the SLC when various wire is used.
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 electronically noisy notification appliances such as
electromechanical bells or horns.
CIRCUIT CONNECTIONS
Circuit Type
Circuit Function
SLC loop
Connects to
(power-limited)
Addressable
Devices
ANN-BUS
Connects to
(EIA-485)
annunciator
(power-limited)
modules
EIA-232
connects to PC
(power-limited)
computer
MMF-300 and
Initiating Device
MMF-301
Circuit
(power-limited)
MMF-302
Initiating Device
(power-limited)
Circuit
CMF-300
Notification
(power-limited)
Appliance
Circuit
Table Footnote
1. When using untwisted, unshielded wire, full conduit is recommended for optimum EMI/RFI protection.
196
Wire Requirements
Table E.1 FACP Wire Specifications
Recommended
Wire Type and Limitations
Max. Distance
Feet (meters)
Twisted, shielded pair
10,000 (3,000 m)
40 ohms maximum per
length of Style 6 and 7
8,000 (2,400 m)
loops. 40 ohms per branch
maximum for Style 4 loops
4,875 (1,450 m)
3,225 (980 m)
Twisted, unshielded pair
10,000 (3,000 m)
40 ohms maximum per
length of Style 6 and 7
8,000 (2,400 m)
loops. 40 ohms per branch
maximum for Style 4 loops
4,875 (1,450 m)
3,225 (980 m)
1
3,000 (900 m)
Untwisted, unshielded pair
Twisted pair with a
6,000 (1,800 m)
characteristic impedance of
120 ohms or less
Twisted, shielded pair
50 (15 m)
Maximum loop wire
2,500 (760 m)
resistance is 40 ohms for the
MMF-300 and 20 ohms for
the MMF-301
No more than a 2.4 volt drop
2,500 (760 m)
allowed at end of circuit.
Maximum loop wire
resistance is 25 ohms
In alarm, no more than a 1.2
Distance limitation
volt drop allowed at end of
set by 1.2 volt
circuit
maximum line drop
WIRE REQUIREMENTS
Wire Gauge and Compatible Brands
12 AWG (3.25 mm
Signal 98230, Belden 9583, WPW999
14 AWG (2.00 mm
Signal 98430, Belden 9581, WPW995
16 AWG (1.30 mm
Signal 98630, Belden 9575, WPW991
Direct Burial Cable Isotec NP713110VNQ-S
18 AWG (0.75 mm
Signal 98300, Belden 9574, WPW975
Direct Burial Cable Isotec NP714110VNQ-S
12 AWG (3.25 mm
6020UL, Genesis WG-4315 & WG-4515
14 AWG (2.00 mm
6120UL, Genesis WG-4313 & WG-4513
16 AWG (1.30 mm
6220UL, Genesis WG-4311 & WG-4511
18 AWG (0.75 mm
6320UL, Genesis WG-4306 & WG-4506
12-18 AWG (3.25 - 0.75 mm
refer to "ANN-BUS Wiring" on page 20
18 AWG (0.75 mm
12-18 AWG (3.25 - 0.75 mm
12-18 AWG (3.25 - 0.75 mm
12-18 AWG (3.25 - 0.75 mm
MS-9050UD PN 52413:C 01/23/08
2
): Genesis 4410,
2
):Genesis 4408 & 4608
2
): Genesis 4406 & 4606
2
): Genesis 4402 & 4602
2
): Belden 5020UL &
2
):Belden 5120UL &
2
): Belden 5220UL &
2
): Belden 5320UL &
2
) using listed wire
2
) minimum
2
)
2
)
2
)
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