6
2
CAN Router
CAN Repeater
System
2.2
CAN Repeater
The CAN repeater is designed for the CAN signal transfer in overlength vehicles,
such as telescoping trailers. Its task is to amplify the CAN signal to ensure the supply
for the connected Trailer EBS over greater distances.
This is required technically as well as for legal reasons, since based on ECE R 13,
the CAN line in the trailer vehicle is only allowed to be a maximum of 18 m on trailer
vehicles without using a CAN repeater. With a CAN repeater connected, the cable
length can be extended by up to 80 meters after the CAN repeater.
The CAN repeater is equipped with a connection for an external pressure sensor.
This pressure sensor generates the brake pressure set value as a CAN signal and
sends it to the downstream Trailer EBS E1 modulator to guarantee the required
timing in accordance with ECE R 13.
This way, the trailer can be used with towing vehicles with no CAN brake signalling
as well.
Fig.
Operation of a CAN repeater (1) with optional external pressure sensor (3) in an
overlength trailer with Trailer EBS E1 (2)
2.3
System prerequisites, Configuration
The CAN router / -repeater is used with the WABCO electronic braking system (T-
EBS) of generations E and D.
Using trailers with CAN routers/-repeaters is permitted on towing vehicles with CAN
interfaces, with at least a pneumatic control line.
On trailers with Trailer EBS E1, an external pressure sensor can be connected to the
CAN router/-repeater. This pressure sensor generates the brake pressure set value
as a CAN signal to optimise the timing in accordance with ECE R 13 behind the
towing vehicle without CAN brake signalling.
!
The use of the external pressure sensor with CAN router/-repeater is only
possible in combination with Trailer EBS E1 (software version as of TE001418).
Trailers with 2× trailer
EBS E1
The CAN brake signal of the towing vehicle is received by the CAN Router and
distributed to both T-EBS E1 modulators. If the CAN signal is not available from the
towing vehicle, the front T-EBS E1 modulator brakes via the yellow control line while
the rear T-EBS E1 modulator brakes via the CAN signal, which the external pressure
generates.
Overlength trailers
The CAN repeater amplifies the CAN signal for overlength trailers. If T-EBS E1 is
installed, the same external pressure sensor is used for optimising the timing when
there is no CAN signal from the towing vehicle.
The CAN router/-repeater in
• EuroCombis or Roadtrains,
1
2
3
