Simplex 2050 Series User Manual

6.2.1.4 NAC wiring distance
This section describes the wiring distances for the Class A and Class B NACs. The wiring distances for the Class A and Class B NACs are
calculated at 49°C or 120°F. If you are installing in locations that are exposed to higher temperatures, refer to NEC. The wiring distance is
based on a 3 V drop and takes into account the control unit's worst case output voltage.
Note: Using the 2081-9028 or the 2081-9044 protectors reduces the wiring distance.
Table 4: NAC Class A wiring distances
Alarm Current
Max distance w/ 18
AWG (0.8231 mm
2
)
Max distance w/ 16
AWG (1.309 mm
2
)
Max distance w/ 14
AWG (2.081 mm
2
)
Max distance w/ 12
AWG (3.309 mm
2
)
DC resistance
0.25 A 420 ft (128 m) 667 ft (203 m) 1,063 ft (324 m) 1,691 ft (515 m) 6 Ohms
0.50 A 210 ft (64 m) 334 ft (102 m) 532 ft (162 m) 845 ft (258 m) 3 Ohms
0.75 A 140 ft (43 m) 222 ft (68 m) 354 ft (108 m) 564 ft (172 m) 2 Ohms
1.00 A 105 ft (32m) 167 ft (51 m) 266 ft (81 m) 423 ft (129 m) 1.5 Ohms
1.25 A 84 ft (26 m) 133 ft (41 m) 213 ft (65 m) 338 ft (103 m) 1.2 Ohms
1.50 A 70 ft (21 m) 111 ft (34 m) 177 ft (54 m) 282 ft (86 m) 1 Ohm
1.75 A 60 ft (18 m) 95 ft (29 m) 152 ft (46 m) 242 ft (74 m) 0.86 Ohm
2.00 A 53 ft (16 m) 83 ft (25 m) 133 ft (41 m) 211 ft (64 m) 0.75 Ohm
2.25 A 47 ft (14 m) 74 ft (23 m) 118 ft (36 m) 188 ft (57 m) 0.67 Ohm
2.50 A 42 ft (13 m) 67 ft (20 m) 106 ft (32 m) 169 ft (51 m) 0.60 Ohm
2.75 A 38 ft (12 m) 61 ft (19 m) 97 ft (30 m) 154 ft (47 m) 0.55 Ohm
3.00 A 35 ft (11 m) 56 ft (17 m) 89 ft (27 m) 141 ft (43 m) 0.50 Ohm
Table 5: NAC Class B wiring distances
Alarm Current
Max distance w/ 18
AWG (0.8231 mm
2
)
Max distance w/ 16
AWG (1.309 mm
2
)
Max distance w/ 14
AWG (2.081 mm
2
)
Max distance w/ 12
AWG (3.309 mm
2
)
DC resistance
0.25 A 840 ft (256 m) 1,335 ft (407 m) 2,126 ft (648 m) 3,382 ft (1,031 m) 12 Ohms
0.50 A 420 ft (128 m) 667 ft (203 m) 1,063 ft (324 m) 1,691 ft (515 m) 6 Ohms
0.75 A 280 ft (85 m) 445 ft (136 m) 709 ft (216 m) 1,127 ft (344 m) 4 Ohms
1.00 A 210 ft (64 m) 334 ft (102 m) 532 ft (162 m) 845 ft (258 m) 3 Ohms
1.25 A 168 ft (51 m) 267 ft (81 m) 425 ft (130 m) 676 ft (206 m) 2.4 Ohms
1.50 A 140 ft (43 m) 222 ft (68 m) 354 ft (108 m) 564 ft (172 m) 2 Ohms
1.75 A 120 ft (37 m) 191 ft (58 m) 304 ft (93 m) 483 ft (147 m) 1.71 Ohms
2.00 A 105 ft (32 m) 167 ft (51 m) 266 ft (81 m) 423 ft (129 m) 1.5 Ohms
2.25 A 93 ft (28 m) 148 ft (45 m) 236 ft (72 m) 376 ft (115 m) 1.33 Ohms
2.50A 84 ft (26 m) 133 ft (41 m) 213 ft (65 m) 338 ft (103 m) 1.2 Ohms
2.75 A 76 ft (23 m) 121 ft (37 m) 193 ft (59 m) 307 ft (94 m) 1.09 Ohms
3.00 A 70 ft (21 m) 111 ft (34 m) 177 ft (54 m) 282 ft (86 m) 1 Ohm
6.2.1.5 NAC wiring specifications
• The maximum ripple is 1/2 V peak-to-peak.
• The current rating for each NAC circuit is 3A maximum. Total load (All NAC's, Aux, MX loop etc...) for panel PSU must not exceed 6A.
• The maximum wiring capacitance when using two-wire audible or visible appliances is 0.22 μF.
• Use a listed secondary protector if the wiring is routed outside the building. Install a protector at the building exit or entrance. Only
use outdoor NAC devices.
• Use 2081-9028 or 2081-9044. Each 2081-9028 adds 0.2 ohms wiring resistance. Each 2081-9044 adds 6 ohms wiring resistance and
greatly reduces the wiring distance.
• See Table 4 and Table 5 for the wiring distances for 0.25 A to 3 A loads.
• For all other UL listed notification appliances, the rating for each NAC is 24 VDC regulated at a maximum of 3 A.
• The total 5 A capacity can be shared between auxiliary loads or all NAC circuits, considering maximum 3A load to each NAC circuit.
• The synchronization of strobes across all NACs in a system that is UL listed for Simplex models is listed in section Notification
Applicances Circuits (NACs).
page 22 579-1404 Rev A
2050 and 2250 Foundation Series Fire Alarm Control Units Installation Guide

Simplex 2050 Series Specifications

General

Brand	Simplex
Model	2050 Series
Category	Control Unit
Language	English