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Knorr-Bremse Group
PD-203-500
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DATA
P r o d u c t
C o m m e r c i a l V e h i c l e S y s t e m s
KB4TA D System Overview
Doc. No. Y250905 (EN - Rev. 000)
July 2016
The Basic Knorr-Bremse
KB4TA D
brake system
comprises a KB4TA D ECU ES1220
(see PD-203-530,
Document No.
Y250907
) plus two ABS Modulator
Valves (see PD-203-360, Document No.
Y250908
) and
is designed for air braked trailers with mechanical or air
suspension.
KB4TA D
is designed to work in trailer systems powered
via ISO 7638 but the addition of ISO 1185 stop lamp
powering is included as standard as a safety feature so,
in the event that there is no ISO 7638 powering, the ABS
function is maintained.
Note: Stop lamp powering should only be considered
as a backup in the event of failure of the ISO 7638
connection.
The
KB4TA D
ECU is designed for all normal
system variants from 2S/2M up to 4S/3M. The configuration as supplied is 2S/2M, but with the integrated
auto-configuration the ECU detects additional sensors and adjusts upward to 4S/2M automatically.
Other configurations and additional functions can be quickly and effectively achieved using PC Software
ECU
talk
®
. For 4S/3M applications an additional external (third) ABS modulator is necessary (see
PD 203-360, Document No.
Y250908
).
The
KB4TA D
brake system is capable of working with drum brake or disc brakes and the systems shown below are
only typical. For more systems see PD-203-580, Document No.
Y250913
.
Function
KB4TA D System diagram (2S/2M) for semi-trailer with air suspension and disc brakes
(ECU mounted above centre of bogie)
Legend:
1 Coupling Head with Filter -
“Supply”
2 Coupling Head with Filter -
“Control”
3 ABS Connector ISO 7638
4 Park / Shunt Valve with
Emergency Function and
integral Charging Valve
5 Air Reservoir
6 Drain Valve
7 Load Sensing Valve
8a ABS ECU
8b ABS Relay Modulator Valve
9 Brake Chamber
10 Spring Brake
11 Sensing Ring and Wheel Speed
Sensor
12 Air Spring Bellow
13 Levelling Valve
14 Test Connector
15 Electrical Connector “Lighting”
acc. to ISO 1185
kb4tad_sys_001
1
2
3
7
5
6
4
8a
14
9
12
10
13
8b
11
15
Y026787: 006: EN: Released: Fri Nov 11 11:18:50 CET 2016:
