System Layout - BPW ECO Tronic EBS Operating And Installation Instructions

The system fi tted to your trailer may have 2 or 4 sensors and 2 or
3 Modulators, the variants available being 2S/2M, 4S/2M and
4S/3M.
The power supply of the system is via: ISO 7638 - 7 pin
connection - the full EBS function is guaranteed Fig. 1.
The power supply of the ECO Tronic EBS with a 5 pin ISO 7638
connection is also possible. In this case the response time (time
between applying the brake pedal and reaction of the brake
chambers) is increased due to the missing CAN databus while
ABS and ELS functionality is still available (see Fig. 2).
In the optional emergency solution (2M systems only) with stop
light electrical power supply, the ECO Tronic EBS is supplied
with electrical power via the ISO 1185 (24N) plug if the power
ISO 7638 - 7 Pin
EBS
Fig. 1
ISO 7638 - 5 Pin
ABS
Fig. 2
ISO 1185 - (24N)
ABS/EBS
Fig. 3
supply via the ISO 7638 plug fails. In this case, only the ABS
function and, optionally, the ALB function are in effect. (see
Fig. 3).
ECO Tronic EBS controls a warning device in the dashboard
(pin 5 of ISO 7638 connector).
The warning lamp has two functions:
• As soon as the ECO Tronic EBS is powered via the ISO 7638
plug (Figs. 163 and 164 on page 92), the system performs a
self-test. The result of this test is displayed by means of a
sequence of warning lights.
• The warning lamp indicates by a permanent display, if a fault
has been detected while the vehicle is moving.
ECO Tronic EBS = full EBS function
ECO Tronic EBS = EBS function with increased response time
(No CAN data bus)
ECO Tronic EBS = on foot brake application
ABS function only + ELS optional

1.4 System layout

9