Appendix D: Wire Requirements; D.1: Sfp-5Ud(E) Nac Wiring - Honeywell NOTIFIER SFP-5UD Series Manual

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 circuit. Reference the chart below to specify wire requirements and limitations
for each circuit.
CIRCUIT CONNECTIONS
Circuit Type
Initiating Device Circuit
(power-limited)
ANN-BUS (EIA-485)
power-limited
ANN-BUS Power
24 VDC Regulated,
resettable, nonresettable
Auxiliary Trouble Input
Remote Sync Output
NAC Outputs
D.1 SFP-5UD(E) NAC Wiring
The following table lists NAC wiring requirements for the SFP-5UD FACP which utilizes the FLPS-3 power supply.
NAC Load
(Amps)
0.25
0.5
0.75
1
1.25
1.5
1.75
2
2.25
2.5
NOTE: Calculations are based on Direct-Current Resistance data for uncoated copper wire, per National Electrical Code (2005 Edition)
Table 8, Conductor Properties.
NOTE: These distances reflect the worst case scenario and are based on the current draw of the highest candela strobes at the low end
of the supported NAC voltage with the entire load at the end of the circuit. Further distances can be achieved by performing a point to point
voltage calculation that more accurately reflects the specific devices used and how they are dispersed on the circuit.
SFP-5UD & SFP-10UD Series Manual— P/N 52879:C6 6/12/2018

Appendix D: Wire Requirements

Circuit Function
Connects to Initiating
Devices
Communication for
ANN-BUS annunciator
and relay modules
Power for ANN-BUS
annunciators
Power for accessories
and 4-wire devices
Open Collector trouble
input for CHG-75,
CHG-120, etc.
Provides strobe and
normal sync for
remote NAC power
supplies
Connects to NAC
devices or Release
devices
Table D.1 FACP Wire Specifications
Max.
allowable Max. allowable wire pair length
total loop
resistance
AWG 12 AWG 14
(ohms)
solid solid
6.00 1554 977
3.00 777 489
2.00 518 326
1.50 389 244
1.20 311 195
1.00 259 163
0.86 222 140
0.75 194 122
0.67 173 109
0.60 155
Table D.2 NAC Wiring Requirements for FACP with FLPS-3 Power Supply
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 2.2, "Wiring Distances," on page 35 for information on device wiring
Untwisted, unshielded wire
Single conductor
Untwisted, unshielded pair
wire
Untwisted, unshielded pair
wire
CLASS-B
(feet)
AWG 16 AWG 18
solid solid
613 386
307 193
204 129
153 97
123 77
102 64
88 55
77 48
68 43
98 61 39
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 126.
CLASS-A
Max. allowable wire pair length
(feet)
AWG 12 AWG 14 AWG 16
solid solid
777 489
389 244
259 163
194 122
155 98
130 81
111 70
97 61
86 54
78 49
Wire Gauge
2
)
2
)
2
)
2
)
2
)
AWG 18
solid solid
307 193
153 97
102 64
77 48
61 39
51 32
44 28
38 24
34 21
31 19
125