Collision Avoidance System CAS-M light Manual

1 System Overview

The CAS-M light helps the driver to focus on the track and warns them if a car is approaching from behind. The system provides information about relative speed and distance on the CAN bus, offering increased benefit during nighttime or in bad weather conditions. The interface is intuitive and adaptable, requiring no special driver training.

1.1 Function principle

CAS-M light provides information for distance and relative speed of the closest vehicle behind via two LEDs (left and right) in the driver display. Only the closest vehicle behind is considered, with all other objects suppressed. In large (green) and medium (yellow) distances, both LEDs are used in parallel. In close (red) distance, left/right determination is performed, and only the appropriate LED is used. Distance and delta speed thresholds can be adjusted individually via CAN. The system includes a pre-defined visualization concept based on Bosch Motorsport expertise.

1.2 Hardware

The CAS-M light system consists of a Bosch automotive mid-range radar sensor. The sensor dimensions are approximately 60mm x 70mm x 32mm. It is shown in front, left, and right views, indicating its compact form factor.

1.3 Wiring

The sensor connects to the vehicle's CAN bus and requires a 12V supply. The wiring schematic shows the following pin assignments: Pin 1 for GND (Sensor Ground), Pin 2 for CAN-H (CAN High), Pin 3 for CAN-L (CAN Low), and Pin 8 for V+ (Supply voltage). Pins 4-7 are not connected.

1.4 CAN communication

The system uses CAN bus for communication, requiring connection for data transfer and vehicle speed information. The CAN Baud rate can be 500 kBaud or 1 MBaud, with an update rate of 50 Hz.

Vehicle Speed

Predefined Messages

Raw values

Important note: Do not use messages 0xB9, 0x757, or 0x7C1 on the sensor CAN as they are not needed and may affect the sensor.

2 Technical Data

Application

Mechanical Data

Electrical Data

An external fuse (10 A) is required. 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

3 Installation Guide

3.1 Mounting the radar sensor

A mounting frame with 4xM6 threaded bushings is provided. The sensor must be mounted longitudinally and laterally leveled, aligned with the vehicle's longitudinal axis, and on the vehicle's lateral centerline. Optimal mounting height is 20 cm to 90 cm off the ground for maximum range. The sensor should have an unobstructed view to the rear. If mounted behind material, ensure it's free of conductive materials. The distance to the surface should be approximately 5 mm.

3.2 Configuration of the system threshold values

The system uses distance and speed thresholds for object detection and LED visualization. These can be adjusted via CAN. The system defines three distance zones: Near (red LED), Medium (yellow LED), and Far (green LED).

Distance thresholds

Speed thresholds

4 Using the CAS-M light Information

4.1 Predefined messages

The system provides CAN messages with evaluated distance and relative speed values.

4.1.1 Configuration distance

4.1.2 Configuration relative speed

4.2 Using raw values

Raw values for distance (dx), relative speed (vx), and lateral position (dy) are available for both left and right sides.

5 Available Packages

The CAS-M light system is available in several configurations:

• 5.1 CAS-M light + connector (500 kBaud): Includes CAS-M light sensor with 500 kBaud CAN speed & mating connector. Part number: F 02U V02 021-01.
• 5.2 CAS-M light + connector (1 MBaud): Includes CAS-M light sensor with 1 MBaud CAN speed & mating connector. Part number: F 02U V02 220-01.
• 5.3 CAS-M light + DDU 9 (500 kBaud): Includes CAS-M light sensor with 500 kBaud CAN speed, mating connector, and DDU 9. Part number: F 02U V02 591-01.
• 5.4 CAS-M light + DDU 9 (1 MBaud): Includes CAS-M light sensor with 1 MBaud CAN speed, mating connector, and DDU 9. Part number: F 02U V02 592-01.

6 Disposal

Hardware, accessories, and packaging should be sorted for recycling in an environmentally friendly manner. Do not dispose of this electronic device in household waste.

7 Loom Options

7.1 Open End

The open end loom connects the sensor to an existing display unit and is compatible with CAS-M light packages F 02U V02 021-01 and F 02U V02 220-01. It includes a sensor matting connector (F 037 B00 168-01), a removable 120 Ω terminating resistor, and an open end loom for the display unit. Part number: F 02U V02 105-01.

8 Legal

8.1 Legal Restrictions

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

8.2 Radar Sensor

8.2.1 Regulations

The CAS-M light radar sensor is based on the Bosch Engineering MRRe14HBW radar sensor. It meets statutory requirements for ground-based vehicles in various countries, including EU directives (Radio Equipment Directive, RoHS, REACH) and specific standards for USA, Canada, and Japan. A detailed list of regulations by country is provided.

8.2.2 Intended Use

The CAS-M light radar sensor is intended for mounting on ground-based vehicles such as construction equipment, agriculture equipment, material handling equipment, mobile work platforms, trains, trams, light rail vehicles, and automotive vehicles (passenger cars, trucks, buses). Proper application and installation according to documentation are crucial for warranty and safety. The product is not serviceable and must be replaced by an authorized body.

8.2.3 Radio Frequency Homologation

Radio frequency homologation is required for operating 76-77 GHz radar sensors. Bosch Engineering provides homologation for the sensor in specified countries. Vehicle manufacturers are responsible for obtaining type approvals and import licenses for the vehicle. Bosch Engineering can provide necessary technical documentation upon customer request. The homologation label is placed on the sensor's back side.

Basic information on radio frequency homologation and import requirements

The CAS-M light radar sensor falls under Short Range Devices (SRD) classification. It is a component of a ground-based vehicle and not sold separately. It requires connection to the vehicle for operation. Exemptions from radio frequency licensing may apply for components mounted in vehicles. The sensor intentionally radiates RF energy, potentially requiring type approval licenses.

Overview Homologation: tasks and responsibilities

Responsibilities of the vehicle manufacturer

Vehicle manufacturers are responsible for obtaining type approvals and import licenses for their vehicles. Bosch Engineering provides technical documentation to assist with component type approval.

Impact of import destinations

The importer responsibilities for the radar sensor component must be clarified based on the OEM's manufacturing location.

Responsibilities of Bosch Engineering

Bosch Engineering provides radio frequency homologation for the sensor in specified countries and maintains the relevant certificates.

8.2.4 Remarks on the Radio Frequency Homologation

General Points

Radio frequency homologation is mandatory for 76-77 GHz radar sensors. Type approval requirements are defined by telecommunication authorities and can vary by country. Bosch Engineering cannot control costs, lead times, or specific requirements for type approval.

Markings on the Component and Manual Phrases

Specific markings and phrases are required for homologation, often printed on the sensor label or included in the user manual. These requirements vary by country.

Example CAS-M light radar sensor label

The sensor label includes various areas detailing data matrix code, manufacturing date, part number, origin, business facility, naming, serial number, type naming, CE conformity mark, Bosch logo, manufacturer address, and frequency certification labels for different regions (USA, Canada, Japan, New Zealand, Australia).

8.2.4.3 Countries where no type approval is obtained

Type approval applications for countries not listed may be handled on customer request and are subject to separate charges. Customers must confirm availability of the 76 GHz frequency range, administrative requirements, and costs.

8.2.5 Country Specific User Manual Statements

8.2.5.1 Europe

8.2.5.1.1 Registration Name

MRRe14HBW

8.2.5.1.2 Required owner manual entry

Bosch Engineering GmbH declares that the CAS-M light radar sensor complies with Directive 2014/53/EU. The full EU declaration of conformity is available at: http://eu-doc.bosch.com. The sensor is based on the MRRe14HBW sensor and can be operated in all EU member states without infringing applicable requirements.

8.2.5.1.3 Declaration of Conformity Translations

This section provides translations of the Declaration of Conformity into various EU languages, confirming compliance with Directive 2014/53/EU. The full text is available at the provided URL.

8.2.5.1.4 Homologation Label of Device

The homologation label is placed on the sensor's back side.

8.2.5.2 United Kingdom

8.2.5.2.1 Registration Name

MRRe14HBW

8.2.5.2.2 Required owner manual entry

Bosch Engineering GmbH declares compliance with relevant UK statutory requirements. The full EU declaration of conformity is available at: http://gb-doc.bosch.com. The sensor can be operated without restrictions in the UK according to the Radio Equipment Regulations 2017.

8.2.5.2.3 Homologation Label of Device

The homologation label is placed on the sensor's back side.

8.2.5.3 USA

8.2.5.3.1 Registration Name

2AM6A-MRRE14HBW

8.2.5.3.2 Required owner manual entry

NOTICE: This device complies with Part 15 of the FCC Rules. Operation is subject to two conditions: no harmful interference caused, and acceptance of any interference. Changes or modifications not expressly approved by Bosch Engineering GmbH may void FCC authorization. This equipment complies with FCC limits for Class A digital devices, designed for commercial environments to provide reasonable protection against harmful interference.

RF Exposure Information

This equipment complies with FCC radiation exposure limits for uncontrolled environments and should be installed with a minimum distance of 20 cm from the body. The transmitter must not be co-located with other antennas or transmitters.

8.2.5.3.3 Homologation Label of Device

The homologation label is placed on the sensor's back side.

8.2.5.4 Canada

8.2.5.4.1 Registration Name

23203-MRRE14HBW

8.2.5.4.2 Required owner manual entry

NOTICE: This device complies with Industry Canada license-exempt RSS standard(s). Operation is subject to two conditions: no interference caused, and acceptance of any interference. RF Exposure Information: This equipment complies with FCC and IC radiation exposure limits for uncontrolled environments and should be installed with a minimum distance of 20 cm from the body. The transmitter must not be co-located with other antennas or transmitters.

8.2.5.4.3 Homologation Label of Device

The homologation label is placed on the sensor's back side.

8.2.5.5 Japan

8.2.5.5.1 Registration Name

202-LSF075

8.2.5.5.2 Required owner manual entry

This device is granted pursuant to the Japanese Radio Law under grant ID: 202-LSF075. Modification of this device is prohibited, as it will invalidate the granted designation number. Japanese text: 本製品の改造は禁止されています。(適合証明番号などが無効となります。)

8.2.5.5.3 Homologation Label of Device

The homologation label is placed on the sensor's back side.

8.2.5.6 Australia

8.2.5.6.1 Registration Name

n/a

8.2.5.6.2 Required owner manual entry

The minimum height of the RCM mark should be 3 mm.

8.2.5.6.3 Homologation Label of Device

The homologation label is placed on the sensor's back side.