Kvaser Leaf Light v2 HS USB to CAN Bus Interface User Manual

1. Introduction

The Kvaser Leaf Light v2 is a USB to CAN bus interface. It features a USB 2.0 compliant connector and a 9-pin D-SUB connector. The device includes galvanic isolation as a standard feature, providing protection from power surges or electrical shocks. It processes 8000 messages per second, each time-stamped with 100 microsecond accuracy. The interface has a low current consumption of 70 mA. Local buffering and preprocessing contribute to high performance and reduce time-critical tasks for the connected PC. The Kvaser CANlib applications programming interface (API) supports development with the Leaf Light v2 interface. This CAN bus controller interface supports various CAN applications, including AFT MARC I, ATI CANLab Network Analysis, ATI VISION Calibration and Data Acquisition, Ficosa CANica, Influx Module Analyzer, Kvaser CanKing, National Instruments DIAdem, National Instruments LabView, Port CANopen Configuration, PPE PCMSCAN, TKE CANtrace, TKE CANopen Configuration, VAT 2000, and Warwick X-Analyser Xtm.

2. Product Features

• 8000 messages per second, each time-stamped with 100 microsecond accuracy.
• Galvanic isolation as standard, enhancing protection from power surges or electrical shocks.
• Low current consumption of 70 mA, reducing power drain from your laptop.
• Local buffering and preprocessing for high performance and reduced time-critical tasks for the PC.
• Supports both 11-bit (CAN 2.0A) and 29-bit (CAN 2.0B active) identifiers.

3. Setup

3.1 Package Contents

Verify that all components are present:

• Kvaser Leaf Light v2 HS USB to CAN Bus Interface
• Documentation (if included)

3.2 Connecting the Device

1. Connect the USB end of the Kvaser Leaf Light v2 HS to an available USB 2.0 port on your computer.
2. Connect the 9-pin D-SUB connector to your CAN bus network. Ensure a secure connection.

Figure 1: Kvaser Leaf Light v2 HS USB to CAN Bus Interface connected to a computer and a CAN bus. The device is shown with its USB connector plugged into a laptop and its D-SUB connector ready for connection to a CAN network.

Figure 2: Close-up view of the 9-pin D-SUB connector on the Kvaser Leaf Light v2 HS. This connector is used to interface with the CAN bus network.

3.3 Driver Installation

Drivers for the Kvaser Leaf Light v2 HS are typically installed automatically upon connection to a Windows operating system. If automatic installation fails, please download the latest Kvaser CANlib drivers from the official Kvaser website. Follow the on-screen instructions for manual installation.

4. Operating Instructions

4.1 Power and CAN Indicators

The device features LED indicators for Power (PWR) and CAN bus activity. Observe these indicators for operational status:

• PWR (Power): Illuminates when the device is receiving power via the USB connection.
• CAN: Indicates activity on the CAN bus. This LED will flash or illuminate to show data transmission and reception.

Figure 3: Close-up view of the PWR and CAN LED indicators on the Kvaser Leaf Light v2 HS. The green LED indicates power, and the amber LED indicates CAN bus activity.

4.2 Software Usage

The Kvaser Leaf Light v2 HS is designed to work with the Kvaser CANlib API and various compatible CAN bus analysis and development applications. Refer to the documentation for your specific software for detailed instructions on configuring and using the interface for data logging, analysis, or simulation.

The device's local buffering and preprocessing capabilities ensure efficient and accurate data handling, with messages time-stamped to 100 microsecond precision.

5. Maintenance

The Kvaser Leaf Light v2 HS is a low-maintenance device. To ensure optimal performance and longevity:

• Keep the device clean and free from dust and debris. Use a soft, dry cloth for cleaning.
• Avoid exposing the device to extreme temperatures, humidity, or direct sunlight.
• Ensure connectors are free from damage and properly seated during use.

6. Troubleshooting

If you encounter issues with your Kvaser Leaf Light v2 HS, consider the following:

• No Power (PWR LED off): Check the USB connection to your computer. Try a different USB port or cable.
• No CAN Activity (CAN LED off/no flashing): Verify the connection to the CAN bus. Ensure the CAN bus is powered and active. Check your software configuration for correct CAN bus settings (e.g., baud rate).
• Software Not Recognizing Device: Ensure the correct drivers are installed. Reinstall drivers if necessary. Check your operating system's device manager to confirm the device is recognized.
• Intermittent Connection: Inspect all cables and connectors for damage. Ensure secure connections. Avoid electromagnetic interference.

For further assistance, refer to the Kvaser support resources or contact Kvaser technical support.

7. Specifications

8. Warranty and Support

For information regarding product warranty, technical support, and service, please refer to the official Kvaser website or contact Kvaser customer service directly. Keep your purchase receipt for warranty claims.