Historic Products

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L-Series Sounder + Strobe, Wall-Mount

SRL tn

The L-Series Horn Strobe (P2RL) is a supplementary audible-visual alarm device with a white xenon flash tube and lens/reflector system. When supplied with DC power of the correct voltage and polarity the P2RL generates an audible alarm signal, and the strobe light flashes at a rate of one flash per second.

The audible alarm signal may be configured using a rotary switch. A range of temporal and non-temporal tones are available, together with two volume settings.

Seven brightness settings are available for the visual alarm signal.

L-Series strobes are compatible with the External Bell & Warning System outputs of Pertronic fire alarm control panels.


  • White flashing wall-mount horn strobe
  • 1 Hz flash rate
  • Horn rated at 88+ dBA at 16 volts
  • Rotary switch for horn tone and volume selection
  • Coloured lenses available in red, amber, or blue
  • Automatic selection of 12- or 24-volt operation at 15 and 30 candela
  • Field-selectable candela settings: 15, 30, 75, 95, 110, 135, and 185
  • Plug-in design with minimal intrusion into the back box
  • Tamper-resistant construction
  • Mounting plate shorting spring allows wiring continuity check before device installation
  • FM Approved
  • Listed to UL 1971 and UL 464
  • Flashes when provided with a 24 Vdc (nominal) power supply of correct polarity
  • Compatible with the fault supervision system on Pertronic fire indicator panel External Bell & Warning System outputs
  • Electrically compatible with SpectrAlert and SpectAlert Advance devices


Installation Note

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