VMU Summary Specification

VMU IS DESIGNED TO PROVIDE A SIMPLE AND FLEXIBLE VEHICLE BASED DATA LOGGING PLATFORM. IT CAN INTERFACE TO VEHICLE ECUS, SENSORS, AND INSTALLED COMPONENTS, TO MEASURE AND RECORD THE VEHICLE USAGE AND OPERATIONAL STATE. IT PROVIDES REAL-TIME LOGGING AND STATISTICAL REDUCTION OF DATA AS WELL AS EVENT AND FAILURE RECORDING.

• 28 channels of Analogue input
• 24 channels of Digital input
• 4 channels Frequency input
• 3 CAN Channels (including MilCAN & J1939)
• RS232 & RS485
• Digital output
• 3 Axis accelerometers
• Temperature sensing
• IP67 sealed enclosure
• -42 C to +85 C operating temperature.
  

VMU and the Crew Information Screen

INTERFACES

The VMU provides unparalleled connectivity to the vehicle and its fitted components. It can link directly to engine, transmission and other ECUs, typically using J1939. It includes extensive direct sensor interfacing to augment the data available from the ECUs. It is the ideal component for applying to legacy vehicles or new vehicle programmes for Health and Usage Monitoring (HUMS).

CONFIGURATION

A wide range of sensor types can be connected to the VMU. The configuration of the unit, its interface to the sensors and the definition of data channels and calibration, is achieved by downloading configuration files from a PC temporarily connected on the CAN Bus. Once loaded, the configuration is held in non-volatile memory.

HUMS

In HUMS applications, VMU acts as the main data store for the automotive components, but additionally can read and store the failure and test data from operational equipment. Its communications capabilities provide access to three separate CAN buses (including MilCAN and J1939), RS232, and RS485. In particular, VMU can read and store data from any CAN connected sub-system, including additional VMUs. VMU can provide driver and operator information in the form of parameter values, failure alarms, and diagnostics information, and Syen provides a variety of rugged displays and screens for that purpose.

ENVIRONMENTAL

VMU is reliable and rugged, designed to meet the arduous conditions of both automotive and military environments. Its sealed enclosure and connectors allow it to be mounted without environmental protection and its operating temperature range enables it to be used anywhere except the ‘hot spots’ of the engine compartment.