Auxiliary Power Selection - Simplex 4007-9101 Installation Manual

6.8 Auxiliary power selection

AUX PWR/SNAC overview
The AUX PWR/SNAC terminal block is located on the top left corner of the power supply. Using the ES Panel Programmer, this point can be configured
as either a 24V Auxiliary (AUX) power or as a simple reverse polarity Notification Appliance Circuit (NAC). This circuit does not support TrueAlert
addressable devices nor non-addressable SmartSync appliances.
The AUX PWR/SNAC is rated 2 A maximum. The current used is deducted from the total available power supply current.
Output rating:
Current Rating:
Earth Detection
Threshold
Wiring Gauge:
Wiring Notes:
1. All wiring from the AUX/SNAC is power limited.
2. The conductors must test free of all grounds and stray voltages before connection to appliances and panel.
3. Terminate Class B NACs, as shown, using a 733- 894 EOL. For Canadian applications, mount end-of-line resistor to a Simplex-US Model 431537
EOL plate in accordance with ULC-S527.
4. If the wiring is routed outside the building, use of a listed secondary protector is required. Use Simplex2081-9028 (rated 5 A) or 2081-9044 (rated
0.2 A). A protector must be installed at each building exit or entrance. Each 2081-9028 adds 0.2 ohms wiring resistance. 2081-9044 adds 6 ohms
wiring resistance, and greatly reduces the wiring distance.
Table 25: Simple NAC wiring limits
Alarm current 20 AWG
0.25 617 ft
0.50 308 ft
0.75 206 ft
1.00 154 ft
1.25 123 ft
1.50 103 ft
1.75 88 ft
Page 33
Fig 27: AUX/SNAC
terminal
29.5 V maximum
2 A, maximum.
10K ohms minimum from either positive
or negative terminals.
18 AWG (min.)
to 12 AWG (max.).
Fig 28: Simple NAC wiring
18 AWG 16AWG
981 ft 1560 ft
490 ft 780 ft
327 ft 520 ft
245 ft 390 ft
196 ft 312 ft
163 ft 260 ft
140 ft 223 ft
4007ES and 4007ES Hybrid Fire Alarm Systems Installation Manual
14 AWG 12 AWG
2480 ft 3944 ft
1240 ft 1972 ft
827 ft 1315 ft
620 ft 986 ft
496 ft 789 ft
413 ft 657 ft
354 ft 563 ft
Line resistance (Ohms)
14.00
7.00
4.67
3.50
2.80
2.33
2.00
579-1102 Rev H