System Sensor P2WLED-LF Low-Frequency LED Wall Sounder Strobe, White

System Sensor P2WLED-LF Low-Frequency LED Wall Sounder Strobe

The System Sensor P2WLED-LF Low-Frequency LED Wall Sounder Strobe is a white fire notification appliance that combines a 520 Hz ± 10% square-wave audible signal with an energy-efficient LED strobe. Designed for sleeping-space applications, it provides seven selectable candela settings, high and low sound output, and regulated 24 VDC operation.

This wall-mount sounder strobe supports Temporal 3, Temporal 4, and continuous audible patterns for hotels, apartments, dormitories, healthcare facilities, and other fire alarm installations requiring low-frequency notification. Field-selectable 15, 30, 75, 95, 110, 135, and 185 candela settings give system designers flexibility when matching visual coverage requirements to room size and layout.

The P2WLED-LF uses a plug-in mounting plate with a shorting spring for wiring continuity checks before final installation. Digital voltage meter test points simplify end-of-line voltage troubleshooting without removing the appliance. It is electrically compatible with SpectrAlert Advance and L-Series devices across the specified 16 to 33 VDC range and supports System Sensor synchronization through compatible power supplies or an MDL Sync Module.

Key Features

• 520 Hz Low-Frequency Signal: Produces a 520 Hz ± 10% square-wave tone for sleeping-space fire notification applications.
• LED Strobe Technology: Provides visual notification with reduced current draw compared with older strobe technologies.
• Seven Candela Settings: Select 15, 30, 75, 95, 110, 135, or 185 cd to match wall-mount coverage requirements.
• Selectable Sound Patterns: Supports Temporal 3, Temporal 4, and continuous operation with high or low volume.
• DVM Diagnostic Points: Allows voltage measurements without removing the appliance from its installed position.
• Plug-In Mounting: Uses an onboard shorting spring to support field wiring continuity checks before device installation.
• System Sensor Sync Support: Synchronizes through approved power supplies supporting System Sensor Sync or an MDL Sync Module.

Technical Specifications

• Brand: System Sensor
• Model: P2WLED-LF
• Series: L-Series
• Product Type: Low-Frequency LED Sounder Strobe
• Color: White
• Mounting: Wall
• Frequency Range: 520 Hz ± 10%
• Waveform: Square wave
• Tone Settings: Temporal 3, Temporal 4, continuous
• Volume Settings: High and low
• Wall Candela Settings: 15, 30, 75, 95, 110, 135, 185 cd
• Strobe Flash Rate: 1 flash per second
• Sound Output, High: 81 dBA
• Sound Output, Low: 78 dBA
• Temporal 3 High Current Draw: 90 / 95 / 117 / 125 / 131 / 137 / 145 mA at 15 / 30 / 75 / 95 / 110 / 135 / 185 cd
• Temporal 3 Low Current Draw: 89 / 89 / 89 / 89 / 89 / 91 / 99 mA at 15 / 30 / 75 / 95 / 110 / 135 / 185 cd
• Temporal 4 High Current Draw: 89 / 89 / 89 / 89 / 90 / 97 / 125 mA at 15 / 30 / 75 / 95 / 110 / 135 / 185 cd
• Temporal 4 Low Current Draw: 89 / 89 / 89 / 89 / 89 / 89 / 91 mA at 15 / 30 / 75 / 95 / 110 / 135 / 185 cd
• Continuous High Current Draw: 137 / 138 / 158 / 163 / 169 / 176 / 185 mA at 15 / 30 / 75 / 95 / 110 / 135 / 185 cd
• Continuous Low Current Draw: 88 / 89 / 89 / 91 / 97 / 104 / 113 mA at 15 / 30 / 75 / 95 / 110 / 135 / 185 cd
• Nominal Voltage: Regulated 24 VDC
• Operating Voltage Range: 16 to 33 VDC, 24 V nominal
• Operating Voltage with MDL Sync Module: 16.5 to 33 VDC, 24 V nominal
• Input Terminal Wire Gauge: 12 to 18 AWG
• Operating Temperature: 32°F to 120°F
• Humidity Range: 10% to 93% non-condensing
• Dimensions: 5.7" L x 4.7" W x 2.2" D
• Surface-Mount Back Box: SBBWL
• Dimensions with SBBWL: 5.8" L x 4.8" W x 4.1" D
• Electrical Compatibility: SpectrAlert Advance and L-Series devices at 16 to 33 VDC
• Synchronization: System Sensor Sync-compatible approved power supplies or System Sensor MDL Sync Module
• UL Listing: S4011
• ULC: Listed
• FM Approval: PR472993
• CSFM: 1653:0157