BPW ECO Tronic EBS - 5.1.2 Trailer Control Module TrCM

56
5 Installation and Operating Instructions
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 (modifi ed 01.01.2011)
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.
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.
Fig. 96
Coupling head (yellow)
Coupling head (red)
Trailer Control Module TrCM
ABS Cable connection
4S/2M Basic Modulator
EBS Cable
EBS Cable
Trailer Control Module TrCM
Brake Installation
Additional connections
e.g. air suspension
S1B
S1A
PWRA
PWRB
23 24 25
1
4
21
22
12
ISO 76381
PWRAPWRBDIAG
S2AS1AAUX5AUX4AUX3AUX2AUX1S1BS2B
red
black
Junction box
Trailer lighting
ISO 1185 or
ISO 12098
2core cable:
24V from brake light (red)
Earth (white)
5.1 Brake system
5.1.2 Trailer Control Module TrCM