SL-155-5D/10D Models (integrated AIS)
6-13NM Marine Lanterns
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Thermal Management
The lanterns incorporate a dynamic intensity module as part of the thermal management
system that ensures it operates within the thermal design window. In practice the thermal
management system limits the lanterns average power consumption by automatically
adjusting the intensity to prevent overheating.
The Thermal Management system does so by multiplying the flash character duty cycle
with the lantern intensity and compares this figure to the Thermal Limit. If the figure (called
the “multiplier”) is greater than the Thermal Limit the intensity is then adjusted to ensure
the Thermal Limit is not exceeded.
This Thermal Limit will come into effect if you select a flash characteristic with a
heavy duty cycle and set a very high intensity. Under these conditions the lantern will
automatically reduce its intensity so that it is operating within the thermal design window.
Note, this intensity limit will not be reached for the vast majority of applications.
The Thermal Limit for the SL-155-5D and SL-155-10D Series lanterns has been set to
28.125%. The relationship between the Thermal Limit, Intensity and Flash Duty Cycle is
illustrated in the following graph:
