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Vehicles being driven on public roads require the operation of the direction indicator lamps to be monitored and a fault instantly signalled to the driver. Direction indicator lamps are an important road safety feature signalling the direction change intention of the driver. Failure to signal or failure to recognise
a direction indicator represents a significant cause for road accidents.
In many countries, LED direction indicator lamps offering a reliable ‘Fit and Forget’ solution, have become the retrofit item of choice for the cost conscious transport operator. LED lamps, with much lower power consumption and Multivolt™ features, are often a challenge for existing failure detection control electronics of modern trucks and buses. Transport fleets often feature a mixture of trailer units equipped with either bulb or LED based direction indicator lamps. Each of these trailer units ideally must be freely interchangeable with any of the truck units in the fleet, including those with 12 volt or 24 volt systems.
Some manufacturers recommend to fit additional resistive loads in parallel to the LED lamp to simulate the 21 watts consumed by a bulb lamp. Such pure resistive load solutions can be problematic for the following reasons:
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They mask the possible failure of the actual LED indicator
lamp itself. |
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b) |
In many cases such pure resistive solutions do not function
since they only provide a linear time/current response which is
significantly different to the time/current response of a bulb
filament when it heats up. |
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They consume a lot of energy and thus eliminate the desired
lower power advantage of an LED lamp. |
Safe conversion to LED direction indicator lamps is now possible with the patented HCS Hella Compatibility Solution.
Hella supplies electronic control and flasher units which make it possible to convert the indicator failure display for various vehicles. This is necessary if the vehicle manufacturer does not guarantee indicator bulb failure control via the vehicle wiring system. The solution has been patented by Hella. Currently, there are two different control and four different LED/bulb compatible flasher units available.
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| HCS symbol |
The innovative patented design makes the
reliable, problem free conversion to Hella LED
based indicator lamps possible.
LED lamps listed in this website marked with
the HCS symbol feature the patented control
technology HCS (Hella Compatibility Solution)
which allows seamless communication with our
HCS control flasher units.
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_WEBSITE_NEW_IMAGES_2010/08)_Technology/7)_Relays/2151-H.jpg "2151-HCS/2BA 980 607-001")
_WEBSITE_NEW_IMAGES_2010/08)_Technology/7)_Relays/2379-CS.jpg "2379-CS/2SD 959 050-401")
