Appendix D: Wire Requirements - Honeywell Fire-Lite Alarms MS-5UD Series Manual

Appendix D: Wire Requirements

Connecting external system accessories to the main circuits must be carefully considered to ensure
proper operation. It is important to use the correct type of wire, gauge and run length for each cir-
cuit. Reference the chart below to specify wire requirements and limitations for each circuit.
CIRCUIT CONNECTIONS
Circuit Type Circuit Function
Initiating Device Connects to
Circuit Initiating Devices
(power-limited)
ANN-BUS (EIA- Communication for
485) ANN-BUS
power-limited annunciator and
relay modules
ANN-BUS Power for
Power ANN-BUS
annunciators
24 VDC Power for
Regulated, accessories and
resettable, 4-wire devices
nonresettable
Auxiliary Trouble Open Collector
Input trouble input for
CHG-75,
CHG-120F, etc.
Remote Sync Provides strobe
Output and normal sync
for remote NAC
power supplies
NAC Outputs Connects to NAC
devices or Release
devices
MS-5UD & MS-10UD Series Manual — P/N 52626:C2 1/24/2012
Wire Type and
Limitations
Untwisted, unshielded wire
(maximum loop resistance
not to exceed 100 ohms)
Twisted pair a maximum
loop resistance of 120
ohms
Refer to Table 2.1, "Wiring Distances," on page 42 for information on device wiring
Untwisted, unshielded wire
Single conductor
Untwisted, unshielded pair
wire
Untwisted, unshielded pair
wire
Table D.1 FACP Wire Specifications
WIRE REQUIREMENTS
Recommended
Max. Distance
Feet (meters)
Distance limitation 12-18 AWG (3.25 - 0.75 mm
set by 100 ohm
resistance limitation
6,000 (1,800 m) 12-18 AWG (3.25 - 0.75 mm
Distance limitation 12-18 AWG (3.25 - 0.75 mm
set by 4 volt
maximum line drop
Distance limitation 18 AWG (0.75 mm
20 feet in same
room
Distance set by 295 12-18 AWG (3.25 - 0.75 mm
ohm resistance
limitation
Refer to Section D.1 and Section D.2 on page 154.
Wire Gauge
2
)
2
)
2
)
2
)
2
)
153