System Sensor P2RLED-LF Low-Frequency LED Wall Sounder Strobe, Red

System Sensor P2RLED-LF Low-Frequency Wall Sounder Strobe

The System Sensor P2RLED-LF Low-Frequency Wall Sounder Strobe is a red, wall-mounted fire notification appliance combining a 520 Hz ± 10% square-wave audible signal with an LED strobe. Designed for sleeping-space notification applications, it operates from 16 to 33 VDC and provides seven field-selectable candela settings.

This L-Series device suits hotels, apartments, dormitories, healthcare environments, and other installations requiring low-frequency audible and visual notification. Installers can select Temporal 3, Temporal 4, or continuous signaling with high or low volume. Candela choices from 15 through 185 cd support different room sizes and coverage requirements while LED technology reduces notification appliance circuit current demand.

The P2RLED-LF uses a plug-in mounting design with a shorting spring that allows wiring continuity checks before appliance installation. Built-in digital voltage meter test points support end-of-line voltage troubleshooting without removing the device. It remains electrically compatible with legacy SpectrAlert Advance and L-Series devices across its specified operating voltage range and supports System Sensor synchronization.

Key Features

• 520 Hz Low-Frequency Signal: Generates a 520 Hz ± 10% square-wave tone for sleeping-space fire notification applications.
• LED Visual Notification: Uses LED strobe technology to reduce current demand while providing visible emergency signaling.
• Seven Candela Settings: Select 15, 30, 75, 95, 110, 135, or 185 cd directly at the appliance.
• Selectable Audible Modes: Choose Temporal 3, Temporal 4, or continuous signaling with high and low volume options.
• DVM Test Points: Measure device voltage with a digital voltage meter without removing the appliance from the wall.
• Plug-In Mounting: Minimizes intrusion into the back box and includes a shorting spring for wiring continuity checks.
• System Synchronization: Supports approved power supplies using the System Sensor Sync protocol or an MDL Sync Module.

Technical Specifications

• Brand: System Sensor
• Model: P2RLED-LF
• Series: L-Series
• Product Type: Low-Frequency Sounder Strobe
• Mounting: Wall
• Color: Red
• Audible Frequency: 520 Hz ± 10%
• Waveform: Square wave
• Tone Settings: Temporal 3, Temporal 4, continuous
• Volume Settings: High and low
• Sound Output: 81 dBA high, 78 dBA low
• Wall Strobe Candela Settings: 15, 30, 75, 95, 110, 135, 185 cd
• Strobe Flash Rate: 1 flash per second
• 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, including lens
• Current Draw Candela Sequence: 15 / 30 / 75 / 95 / 110 / 135 / 185 cd
• Temporal 3 High Current Draw: 90 / 95 / 117 / 125 / 131 / 137 / 145 mA
• Temporal 3 Low Current Draw: 89 / 89 / 89 / 89 / 89 / 91 / 99 mA
• Temporal 4 High Current Draw: 89 / 89 / 89 / 89 / 90 / 97 / 125 mA
• Temporal 4 Low Current Draw: 89 / 89 / 89 / 89 / 89 / 89 / 91 mA
• Continuous High Current Draw: 137 / 138 / 158 / 163 / 169 / 176 / 185 mA
• Continuous Low Current Draw: 88 / 89 / 89 / 91 / 97 / 104 / 113 mA
• Synchronization: System Sensor Sync protocol or System Sensor MDL Sync Module with approved power supply
• Electrical Compatibility: Legacy SpectrAlert Advance and L-Series devices at 16 to 33 VDC
• UL Listing: S4011
• UL/ULC: Listed
• FM Approval: PR472993
• CSFM: 1653:0157
• Country of Origin: Mexico