P2WL — System Sensor L-Series indoor selectable-output horn strobe, 2-wire, wall mount, white housing with "FIRE" marking. The strobe is a xenon flash tube; this is the pre-LED model, superseded by the P2WLED.
The L-Series line of wall-mount horns, strobes and horn strobes increases application versatility while simplifying installation. All devices feature plug-in designs with minimal intrusion into the back box, making installations fast and foolproof while virtually eliminating costly and time-consuming ground faults. A universal mounting plate with an onboard shorting spring lets installers test wiring continuity before the device is installed. Installers adapt the device to the application using field-selectable candela settings, automatic selection of 12- or 24-volt operation, and a rotary switch for horn tones with two volume selections. The horn strobe is wired as a primary-signaling notification appliance and complies with the Americans with Disabilities Act requirements for visible signaling appliances, flashing at 1 Hz over the strobe’s entire operating voltage range.
Specifications
| Device type |
2-wire horn strobe, wall mount, white, "FIRE" marking |
| Strobe type |
Xenon flash tube with lens/reflector system |
| Candela settings (wall) |
15, 30, 75, 95, 110, 135, 185 cd, field-selectable |
| Nominal voltage |
Regulated 12 DC or regulated 24 DC/FWR |
| Operating voltage range |
8 to 17.5 V (12 V nominal) or 16 to 33 V (24 V nominal) |
| Operating voltage with MDL3 Sync Module |
8.5 to 17.5 V (12 V nominal) or 16.5 to 33 V (24 V nominal) |
| Strobe flash rate |
1 flash per second |
| Horn rating |
88+ dBA at 16 volts |
| Horn tone patterns |
Temporal and non-temporal, plus 3.1 kHz temporal and 3.1 kHz non-temporal, each at high or low volume (eight rotary switch positions) |
| Sound output, 16–33 V DC |
Temporal 89 / 83 dBA; non-temporal 90 / 84 dBA; 3.1 kHz temporal 88 / 82 dBA; 3.1 kHz non-temporal 89 / 83 dBA (high / low) |
| Sound output, 8–17.5 V DC |
Temporal 84 / 75 dBA; non-temporal 85 / 76 dBA; 3.1 kHz temporal 83 / 76 dBA; 3.1 kHz non-temporal 84 / 77 dBA (high / low) |
| Current draw, 16–33 V DC, temporal high |
15 cd: 54 mA; 30 cd: 74 mA; 75 cd: 121 mA; 95 cd: 142 mA; 110 cd: 162 mA; 135 cd: 196 mA; 185 cd: 245 mA |
| Current draw, 16–33 V DC, temporal low |
15 cd: 44 mA; 30 cd: 65 mA; 75 cd: 111 mA; 95 cd: 133 mA; 110 cd: 157 mA; 135 cd: 184 mA; 185 cd: 235 mA |
| Current draw, 16–33 V DC, across all tones |
15 cd: 44–73 mA; 30 cd: 65–94 mA; 75 cd: 111–139 mA; 95 cd: 133–160 mA; 110 cd: 157–182 mA; 135 cd: 184–211 mA; 185 cd: 235–262 mA |
| Current draw, 16–33 V FWR, across all tones |
15 cd: 68–111 mA; 30 cd: 90–135 mA; 75 cd: 145–185 mA; 95 cd: 165–207 mA; 110 cd: 185–230 mA; 135 cd: 222–264 mA; 185 cd: 271–326 mA |
| Current draw, 8–17.5 V DC |
15 cd: 91–106 mA; 30 cd: 154–166 mA (15 and 30 cd only — see notes) |
| Operating temperature |
32°F to 120°F (0°C to 49°C) |
| Humidity range |
10 to 93% non-condensing |
| Input terminal wire gauge |
12 to 18 AWG |
| Dimensions (including lens) |
5.6" L × 4.7" W × 1.91" D (143 mm × 119 mm × 49 mm) |
| Listings |
UL 1971 and UL 464 |
Installation notes
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12 V operation is limited to 15 and 30 cd. The data sheet states that strobe products operate at 12 V nominal only for 15 cd and 30 cd. A design at 75 cd or above must run at 24 V nominal.
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No coded horn settings on a 2-wire model: switch positions 9 and 10 (coded and 3.1 kHz coded) are not available on 2-wire horn strobes. Temporal coding must be provided by the NAC; if the NAC voltage is held constant, the horn output remains constantly on.
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Wall candela set: wall units use 15/30/75/95/110/135/185 cd. Ceiling models use 15/30/75/95/115/150/177 cd. Never mix the two sets or their current draw tables.
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This is a xenon appliance, not an LED one. Do not apply the LED family’s low current figures (18–120 mA) or its 24 V-only 16–33 V range to the P2WL. The P2WL draws substantially more current and does support 12 V nominal at 15 and 30 cd.
- Listed for wall mounting only.
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FWR draws more current than DC at the same setting — up to 326 mA against 262 mA at 185 cd. Size the notification appliance circuit from the column matching the actual supply type.
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Back boxes: standard 2 × 4 × 1⅝-inch, 4 × 4 × 1½-inch, 4-inch octagon, or double-gang. The NAC wiring terminates at the universal mounting plate.
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Synchronization: the MDL3 Sync•Circuit module synchronizes strobes at 1 Hz and horns at temporal three, and can silence the horns while the strobes keep operating over a single pair of wires. It must not be operated from a coded power supply.
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Retrofit: electrically compatible with legacy SpectrAlert and SpectrAlert Advance devices.
Related models
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P2WLED — the current LED replacement for this model; 24 V only (16–33 V) with much lower strobe current
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P2RL — the same 2-wire wall horn strobe in a red housing
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P2WL-P — plain housing, no "FIRE" marking
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P2WL-SP — "FUEGO" marking
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P2GWL — compact white wall horn strobe
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SWL — white wall strobe without a horn
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HWL — white wall horn without a strobe; it does offer the coded tone settings
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SBBWL — white wall surface mount back box
Specifications taken from the System Sensor data sheet "Indoor Selectable-Output Horns, Strobes, and Horn Strobes for Wall Applications," document AVDS865-04 (11/17/2017). Manufacturer specifications are subject to change without notice.
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