Appendix e: wire requirements – Fire-Lite MS-9050UDC Addressable Fire Alarm Control Panel User Manual
Page 171
MS-9050 Series Manual — P/N 52413:G 4/14/2014
171
Appendix E: Wire Requirements
T-tapping of the SLC loop wiring is allowed for 2-wire (Style 4) configurations. The total resis-
tance 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 consid-
ered 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 mini-
mize 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
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 maximum
for Style 4 loops
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
Direct Burial Cable Isotec NP713110VNQ-S
18 AWG (0.75 mm
2
): Genesis 4402 & 4602
Signal 98300, Belden 9574, WPW975
Direct Burial Cable Isotec NP714110VNQ-S
Twisted, unshielded pair
40 ohms maximum per length
of Style 6 and 7 loops. 40
ohms per branch maximum
for Style 4 loops
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
): Belden 5020UL &
6020UL, Genesis WG-4315 & WG-4515
14 AWG (2.00 mm
2
):Belden 5120UL &
6120UL, Genesis WG-4313 & WG-4513
16 AWG (1.30 mm
2
): Belden 5220UL &
6220UL, Genesis WG-4311 & WG-4511
18 AWG (0.75 mm
2
): Belden 5320UL &
6320UL, Genesis WG-4306 & WG-4506
Untwisted, unshielded pair
1
3,000 (900 m)
12-18 AWG (3.25 - 0.75 mm
2
) using listed wire
ANN-BUS
(EIA-485)
(power-limited)
Connects to
annunciator
modules
Twisted pair with a
characteristic impedance of
120 ohms or less
6,000 (1,800 m)
refer to Table 2.1, “Wiring Distances,” on page 37.
EIA-232
(power-limited)
connects to 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: Contact
Closure
Maximum loop wire
resistance is 1500 ohms
2,500 (760 m)
12-18 AWG (3.25 - 0.75 mm
2
)
MMF-302
(power-limited)
Initiating Device
Circuit: Two-wire
Modules
No more than a 2.4 volt drop
allowed at end of circuit.
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
maximum line drop
12-18 AWG (3.25 - 0.75 mm
2
)
Table E.1 FACP Wire Specifications
1 When using untwisted, unshielded wire, full conduit is recommended for optimum EMI/RFI protection.