TEBS E
7
External systems
129
TailGUARDlight TailGUARD TailGUARD
Roof
TailGUARDMAX
Sensitivity of sen-
sors
Only objects di-
rectly behind the
left or right sensor
are detected and
displayed.
Objects located
between the sen-
sors are not de-
tected.
Big moving objects
are detected inde-
pendent of one
another and dis-
played.
Objects at ground level and roof level are
detected and displayed, independent of
one another.
Small moving
objects are de-
tected independ-
ent of one an-
other and dis-
played.
Distance display
(Mode)
ISO 12155 ISO 12155 or
WABCO Standard
ISO 12155 or
WABCO Standard
ISO 12155
TailGUARDlight – Ramp approach support
This system only measures the distance to a ramp with two ultrasonic sensors. Not
the entire area behind the vehicle is monitored.
TailGUARDlight supports the driver in reversing up to loading ramps. Here in inter-
action with Trailer EBS, the trailer vehicle brakes automatically before reaching the
load ramp in order to prevent damages to the vehicle and ramp.
The braking pressure is defined depending on vehicle speed and the distance to
the object measured by the ultrasonic sensors.
Provided the speed is below 9 km/h the brake is activated only for the final stop of
the vehicle in front of the ramp. If the vehicle moves backward at > 9 km/h, the sys-
tem triggers short brake impulses to notify the driver of the excessive speed and
reduces the speed.
To avoid damage while loading and unloading due to relative movements of the
vehicle towards the ramp, a space between trailer and ramp is maintained. The
minimum distance is 30 cm; WABCO recommendation: 50 cm.
With a Trailer Remote Control installation in a towing vehicle, the distance to the
ramp is displayed with two rows of LEDs. At the same time, the distance to the
ramp is indicated by a buzzer or Trailer Remote Control emitting different frequen-
cies.
If the angle between the ramp and the direction of vehicle movement is > 10°, the
ramp cannot be detected in all circumstances.
TailGUARD – Reverse monitoring system (includes TailGUARD, TailGUARD
Roof
and TailGUARDMAX)
With this system, the entire area behind the vehicle is monitored with ultrasonic
sensors.
WABCO recommends a minimum system of three sensors on the main level (Tail-
GUARD).
As of version TEBS E2.5, the new
Roof
installation option for Tail-
GUARD and TailGUARD optimised the detection of protruding ramps.
To enable detection of roofs with TailGUARD
Roof
even where space is
restricted, the upper external sensors can be mounted horizontally. A
wide-range reverse monitoring system is not provided for the upper
level with this installation variant.
Please note the descriptions of installation and start-up in this regard.
TailGUARD detects objects on the ground, such as light posts or other objects that
are located in the pick-up area of the ultrasonic sensors (at the height of the ultra-
sonic sensors). TailGUARDMAX is tested according to ISO 12155. During the in-
stallation, the install dimensions must be maintained, see chapter 8.8 ‘Installation
of TailGUARD components’, page 153.
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