Wabco EBS Trailer Modulator 1506654

Typical Defects:
No communication/diagnosis with the ESP control unit possible
Loss of full functionality, intermittent or permanent
Detected incorrect battery voltage value

The code WABCO OE 4801020140 is a EBS modulator for trailers and semi-trailers, belonging to the Trailer EBS D family. It is an integrated electropneumatic unit that combines the electronic control part with the pneumatic braking modulation part.

This component is designed for managing the electronic braking of the towed vehicle, with control of braking pressures, ABS functions, wheel sensor monitoring, and interfacing with other devices in the trailer system. Its function is central to the system, as it coordinates the braking response of the trailer more quickly and accurately than a purely pneumatic logic.

Technical features

• Modulator WABCO Trailer EBS D (Premium)
• System 4S/3M
• Power supply 24 V
• Protection IP66
• Maximum operating pressure 8.5 bar
• Mounting center distance 135 mm
• Mounting 2 x M10
• Main pneumatic threads: M22 x 1.5 on the main supply and output ports; M16 x 1.5 on some auxiliary ports
• Operating temperature range from -40 °C to +65 °C
• Indicative weight of about 4.366 kg
• Indicative dimensions approximately 304 x 210 x 238 mm

DIPA can intervene to overhaul these components thanks to its experience and expertise.

Functionality

• Electronic management of the braking of the trailer or semi-trailer
• ABS function via wheel speed sensors
• Electropneumatic modulation of braking pressure
• Braking control based on the load of the towed vehicle
• Possibility of separate control of certain braking circuits based on the installed configuration
• Interfacing with modules such as ECAS and other trailer system devices
• Support for advanced functions of the TEBS D generation
• Diagnostic management of the trailer EBS system

Model applications

• Trailers and semi-trailers equipped with WABCO Trailer EBS D system and 4S/3M architecture

Typical defects

• No communication/diagnosis with the ESP control unit possible
• Complete, intermittent, or permanent loss of functionality
• Detected incorrect battery voltage value

Final conclusions

The WABCO OE 4801020140 is a Premium Trailer EBS D modulator for trailers and semi-trailers, intended for the electronic and pneumatic management of the braking of the towed vehicle. It is a fundamental technical component of the braking system, as it integrates EBS control, ABS function, pressure management, and dialogue with other devices in the trailer system.

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