1. Product Overview
The KVASER U100 is a robust single-channel CAN/CAN FD to USB interface designed to meet the demanding needs of the evolving automotive development market. It features enhanced galvanic isolation, ensuring reliable and safe operation in various environments. This device facilitates seamless communication between a computer and a CAN or CAN FD network, making it an essential tool for engineers and developers working with vehicle bus systems.

Figure 1: KVASER U100 device with connected USB and D-Sub9 cables, showing its compact design.
2. Key Features
- Supports CAN FD up to 8 Mbit/s (when implemented with correct physical layer).
- Supports both 11-bit (CAN 2.0A) and 29-bit (CAN 2.0B active) identifiers.
- Powered directly by the USB connector, eliminating the need for an external power supply.
- Supports bitrates ranging from 10 Kbit/sec to 1 Mbit/sec for standard CAN.
- Features a lightweight fiberglass reinforced polyamide housing overmolded with TPE for enhanced durability and protection.
- Enhanced galvanic isolation for robust and safe operation.
3. Setup Guide
3.1. System Requirements
- A personal computer (PC) with an available USB Type A port.
- Compatible operating system (e.g., Windows, Linux, macOS).
- Internet access for driver and software downloads.
3.2. Driver Installation
- Visit the official Kvaser website (www.kvaser.com) to download the latest drivers and software for the KVASER U100.
- Locate the "Drivers & Software" section and select the appropriate package for your operating system.
- Follow the on-screen instructions to complete the driver installation. It is recommended to install drivers before connecting the device.
3.3. Hardware Connection
- Connect the USB Type A connector of the KVASER U100 to an available USB port on your PC. The device is USB-powered and does not require an external power supply.
- Connect the D-Sub9 Pin connector of the KVASER U100 to your CAN or CAN FD network. Ensure proper termination and cabling for the CAN network.

Figure 2: Detail of the D-Sub9 connector for CAN network connection.
4. Operating Instructions
4.1. Software Interaction
Once the drivers are installed and the KVASER U100 is connected, it will be recognized by your operating system. You can then use Kvaser's provided software tools (e.g., Kvaser CanKing, Kvaser Device Guide) or third-party applications that support Kvaser interfaces to interact with the CAN network.
- Configuration: Use the Kvaser Device Guide or your application's settings to configure the CAN channel's bitrate, CAN FD settings, and other parameters to match your network.
- Sending Messages: Utilize the software interface to compose and transmit CAN or CAN FD messages onto the bus.
- Receiving Messages: Monitor and log incoming CAN or CAN FD messages from the network through the software.
4.2. LED Indicators

Figure 3: KVASER U100 device body with visible TX and RX indicators.
| Indicator | Description |
|---|---|
| TX (Transmit) | Illuminates when the KVASER U100 is actively transmitting data onto the CAN bus. |
| RX (Receive) | Illuminates when the KVASER U100 is actively receiving data from the CAN bus. |
5. Maintenance
The KVASER U100 is designed for durability and requires minimal maintenance. Follow these guidelines to ensure its longevity:
- Keep the device clean and free from dust and debris. Use a soft, dry cloth for cleaning. Avoid liquid cleaners.
- Store the device in a cool, dry place when not in use.
- Avoid exposing the device to extreme temperatures, humidity, or direct sunlight.
- Do not attempt to open the device housing, as this will void the warranty.
- Handle cables and connectors with care to prevent damage.
6. Troubleshooting
If you encounter issues with your KVASER U100, refer to the following common troubleshooting steps:
| Problem | Possible Cause | Solution |
|---|---|---|
| Device not recognized by PC. | Drivers not installed or corrupted; faulty USB port/cable. | Ensure Kvaser drivers are correctly installed. Try a different USB port or cable. Restart your PC. |
| No CAN communication. | Incorrect CAN bitrate/settings; improper network termination; faulty CAN cabling. | Verify CAN bitrate and FD settings in your software match the network. Check CAN bus termination (120 Ohm resistors at each end). Inspect CAN cables for damage. |
| TX/RX LEDs not active. | No data activity on the bus; device not properly connected or configured. | Confirm the device is recognized and configured in your software. Ensure there is actual data traffic on the CAN bus. Check physical connections. |
| Software errors or crashes. | Outdated software/drivers; software conflict. | Update Kvaser drivers and software to the latest versions. Close other applications that might conflict. |
7. Specifications
| Attribute | Value |
|---|---|
| Model Number | 01173-1 |
| Product Dimensions (L x W x H) | 5.04 x 1.5 x 1.02 inches |
| Item Weight | 5.9 ounces |
| Connector Type | D-Sub9 Pin, USB Type A |
| Compatible Devices | PC |
| Specific Uses For Product | Engineers |
| CAN/CAN FD Support | CAN 2.0A (11-bit), CAN 2.0B (29-bit), CAN FD (up to 8 Mbit/s) |
| Bitrates | 10 Kbit/sec to 1 Mbit/sec (CAN) |
| Power Supply | USB powered |
| Housing Material | Fiberglass reinforced polyamide overmolded with TPE |
8. Warranty and Support
For detailed warranty information and technical support, please refer to the official Kvaser website or contact Kvaser customer service directly. Kvaser provides comprehensive support resources, including documentation, FAQs, and contact options for technical assistance.
Kvaser Official Website: www.kvaser.com




