• Maximum alarm current is 2A on a circuit. See Wiring notification appliance circuits guidelines for line distance.
• The operation of the NAC (Off on Reset; Off on Silence) is determined by the setting of the NAC Operation programming option. See
Programming for information on setting this option.
• When wiring NYC Abort operation, NAC1 is used for connecting bells and bell strobes associated with the investigation timer, NAC2 is
used for connecting audible notification appliances, and RAC2 is used for connecting visual notification appliances.
• When NAC wiring is routed outside the building, use Listed Secondary Protector 2081-9028. A protector must be installed at the
building entrance such that protected wiring is segregated from unprotected (outdoor) wiring.
• Maximum open circuit voltage, non-alarm (standby) state is 29 VDC. Maximum voltage for alarm state is 26 VDC. Maximum current:
2ADC.
Table 4: Maximum Distance from Panel to Last Device (Feet)
Alarm Current
Amps
18 AWG 16 AWG 14 AWG 12 AWG
Line Resistance
(Ohms)
0.25 840 1335 2126 3382 12
0.50 420 667 1063 1691 6
0.75 280 445 709 1127 4
1 210 334 532 845 3
1.25 168 267 425 676 2.4
1.50 140 222 354 564 2
1.75 120 191 304 483 1.71
2 105 167 266 423 1.5
5.5.1 Field wiring connections
The panel is rated Special Appliance for a maximum of 2A on a notification appliance circuit (NAC) with Simplex 4901, 4903, 4904, and
some 4906 TrueAlert and TrueAlert Multi-Candela notification appliances. A complete list of compatible appliances is given in Table C-1.
The maximum number of strobes that can be synchronized is 33. For these devices, the entire power supply capacity of 3A is available
for strobe use or any combination of horn/strobe loading. When multiple strobes are visible from any location, the strobes must be
synchronized in accordance with UL 1971. Use a UL Listed sync control module compatible with Simplex visible appliances employed.
Simplex models 4905-9914 (Class B) and 4905-9922 (Class A) are compatible with Simplex visible appliances and will synchronize all
strobes on a single NAC.
For all other UL Listed notification appliances, NACs are rated Regulated 24 VDC at 1.5A maximum each. The maximum allowed strobe
load is 1.35A. The balance of the 3A capacity can be releasing appliances, auxiliary loads or audible notification appliances.
All other regulated 24 VDC synchronized notification appliances require the use of their associated UL Listed external synchronization
module. The notification circuit rating is 1.5A maximum. The maximum strobe load on a power supply is 1.35A. Use the UL rated operating
current to determine maximum number of appliances allowed on a NAC.
page 30 579-354 Rev. X
4004R Fire Alarm installation, programming, and operating instructions
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