Trailer Control Module Trcm - BPW ECO Tronic EBS Operating And Installation Instructions

5 Installation and Operating Instructions
5.1 Brake system

5.1.2 Trailer Control Module TrCM

Applications
The Trailer Controle Module TrCM is a trailer brake valve with
emergency brake, combined actuation valves (release and
parking valve) and a charging valve without backfl ow. The
release valve deactivates the „emergency brake" (black control
button). By activating the parking brake valve, the parking brake
is released or activated (red control button). The integrated
charging valve without backfl ow guarantees the supply of
compressed air to the brake system. The fl ow of air to secondary
systems is only allowed once the brake system has reached
the rated pressure.
The valve meets the requirements of EC/ECE directives for
braking systems.
Mode of Operation
Supply line coupled:
With the supply line coupled, the supply pressure provided by
the towing vehicle is available without limitation. After exceeding
the overfl ow pressure, the supply pressure is also available to
the secondary loads.
Brake line coupled:
With the application of pressure via the brake coupling head, the
pressure is transmitted without reduction via control terminal 4
to connection 21 (no relay effect).
Parking brake activation:
By pulling the release valve (red button), the spring brake system
connection 22 is coupled to the venting connection 3. This
reduces pressure in the spring brake system and activates the
parking brake system.
Pushing the red control button couples the spring brake system
connection 22 to the air supply tank connection 1-2. This builds
up pressure in the spring brake system and releases the parking
brake system again.
Brake Installation
Coupling head (yellow)
Coupling head (red)
EBS Cable
ISO 7638 1
ISO 1185 or
ISO 12098 Trailer lighting
Fig. 96
56
(modifi ed 01.01.2011)
Additional connections
e.g. air suspension
23 24 25
4
1
black red
Trailer Control Module TrCM
EBS Cable
Junction box
2 core cable:
24V from brake light (red)
Earth (white)
Trailer Control Module TrCM
Fig. 95
(modifi ed 01.01.2011)
Release device service brake system (BBA):
The release valve deactivates the automatic braking („emergency
braking") triggered by the decoupling of the emergency line (cf.
EG-RL, Appendix I, Section 2.2.2.11 and ECE-R13, Section
5.2.2.11). Pushing the black control button (with decoupled
emergency line / brake line deactivates the automatic
braking. This is implemented by decoupling connection 21
from connection 1-2 and coupling (vented) connection 4 to
connection 21. Recoupling the feed and supply line and supply
to the compressed air (towing vehicle) automatically switches
the release valve back to the normal operating position.
21
22
ABS Cable connection
1 2
S1B
S1A
DIAG PWR B PWR A