Collision Avoidance System CAS-M light

The collision avoidance system CAS-M light helps the driver to focus on the track and warns him if a car is approaching from behind. The system provides information about relative speed and distance of the closest vehicle on the CAN bus. An additional display with CAN bus interface is required (e.g. DDU 9).

The information is based on a Bosch radar sensor which contains a FMCW radar transceiver operating in the frequency range of 76.0 - 77.0 GHz. Targets in front of the sensor are reflecting the radar signal and the relative speed and distance is determined via Doppler-effect and beat frequency.

The benefit is even more increased during darkness or in bad weather conditions. The system interface is very intuitive and adaptable to the drivers liking.


Link to the up-to-date EU Declaration of Confirmity DoC:

(Please enter the model MRRe14HBW on which CAS-M sensors are based on to find the correct DoC in the database.)



  • Radar sensor with integrated logic
  • Warning for overtake situations
  • Easy system adaptation
  • Universal CAN interface for various displays
  • Visualization via display LEDs


Operating temperature

-40 to 85°C

Storage temperature

-20 to 95°C


150 m


1 Object (nearest)



CAN rate

500 kbaud or 1 Mbaud

CAN update rate

50 Hz

Horizontal field of view Radar

85° from 0 to 29 m
70° from 29 to 46 m
50° from 46 to 73 m
42° from 73 to 78 m
20° from 78 to 95 m


Technical Specifications

Mechanical Data

Weight of radar sensor MRR

199 g


60x70x32 mm

Protection Classification

IP 6K6K (DIN 40 050) IP 6K7 (DIN 40 050)

Max. vibration

Randome vibration aeff = 30.8 m/s², 3x8 h (according ISO/DIS 16750-3)

Electrical Data

Supply voltage

6.5 to 18 V

An external fuse has to be provided (rec. 10 A).

External overvoltage protection is required (internal overvoltage protection up to 35 V).


Reverse polarity voltage protection

-14 V max. t ≤ 60 sec

Connectors and Wires

Mating connector


Pin 1


Pin 2


Pin 3


Pin 4


Pin 5


Pin 6


Pin 7


Pin 8



Installation Notes

The system includes a radar sensor and a detailed user manual.

Ordering information for suitable wiring looms for the different CAS-M light packages are specified in the user manual.

The system needs to be connected to the vehicle CAN bus (connection to display needed) and supplied with 12 V from the supply system on board.

The rear unit must be mounted 90° to the vehicles vertical and horizontal axis and within ± 200 mm of the vehicle lateral centerline. 

Mounting distance of radar over ground: 300 to 1,000 mm

To achieve the expected performance from the radar sensor, it must have a clear and unobstructed view. There should be no material over the radar sensor and the sensor should be allowed a clear 180-degree field of view.

The system needs yaw rate and vehicle speed information.

Cat 6 A standard for Gigabit Ethernet.

See CAS-M light in action on


The CAS-M 3 radar sensor is based on the Bosch Engineering MRRe14HBW radar sensor. The MRRe14HBW is frequency certified for the following countries:


Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Iceland, Liechtenstein, Norway, Switzerland





New Zealand

United Kingdom

If the MRRe14HBW and hence the CAS-M 3 radar sensor SCU is not operated within this context, it lies within the customer’s responsibility to ensure compliance of the application with national regulations and standards, e.g., electromagnetic compatibility and radio spectrum matters.

Link to the up-to-date EU Declaration of Confirmity DoC:

(Please enter the model MRRe14HBW on which CAS-M sensors are based on to find the correct DoC in the database.)


Ordering Information

CAS-M light (500 kbaud)

Order number: F02U.V02.021-01

CAS-M light (1 Mbaud)

Order number: F02U.V02.220-01

CAS-M light incl. Display DDU 9 (500 kbaud)

Order number: F02U.V02.591-01

CAS-M light incl. Display DDU 9 (1 Mbaud)

Order number: F02U.V02.592-01


Wiring schematic

Legal Restrictions

The sale of this product in Mexico is prohibited.

Due to embargo restrictions, sale of this product in Russia, Belarus, Iran, Syria, and North Korea is prohibited.