Discovery Marine Sounder Visual Indicator Base

Product Overview

The Marine Sounder Beacon Base is a multi-functional device comprising of a mounting base for Discovery Marine Detectors, a sounder, beacon, and a short circuit isolator.

The Discovery Marine Sounder Visual Indicator Base is used to provide an audible and visual warning of fire and is controlled by the appropriate fire control panel by means of the full Discovery protocol, the particular feature of which should be requested from the panel manufacturer.


  • 15 evacuation tones and 15 secondary or alert tones.
  • Seven volume levels.
  • Software-defined group addressing.
  • Alarm switching by individual device, by group or all devices on the loop.
  • Independent control of sounder and visual indicator.
  • Set-up and testing of devices at point of installation.
  • Isolator status information.
  • Unique acoustic self-test.


  • ESC
  • LR
  • ABS
  • ESC
  • DBI


Operating Voltage (Polarity Sensitive) 17-28 V dc
Current Consumption at 24 V dc
Quiescent Current 450µA
Power-Up Surge Current 1.2 mA
Device Operated at Max Volume 8 mA
Max Sounder Output 90 +/- 3dB(A)
Operating Temperature -20°C to +60°C
Relative Humidity 0 to 95% RH
IP Rating Designed to IP21D
Size 115mm D x 38mm H
Weight 168 grams

Please Note: All data is supplied subject to change without notice. Specification are typical at 24 V, 23°C and 50% RH unless otherwise stated.

Item Numbers

45681-394MAR Discovery Marine Sounder Visual Indicator Base