Loading... Please wait...
)
Product Description
Free Shipping Within the United States!
The introduction of 500 Kbps (see SAE J1939/14) as an alternative to 250 Kbps required clarifications on how to solve problems that come with incorporating devices supporting different baud rate settings in the same network.
The JCOM.J1939.BRC converts SAE J1939 standard baud rates 250k to 500k and vice versa. The converter provides one CAN Bus port at 250k baud and another at 500k baud. The converter operates at voltages between 7 VDC and 32 VDC, therefore well-suited for operation with diesel engines.
To answer a frequently asked question: The device converts any PGN it receives. If it receives it on the 250k port, it will pass it on to the 500k port. If it receives it on the 500k port, it will pass it on to the 250k port.
The device does not require any programming effort. Simply connect the 250k and 500k signals, CAN_H and CAN_L. LEDs on the board will indicate the data traffic.
Important!
Understanding the data exchange between the 250k and 500k components is crucial when using this device. Many customers replace truck engines and related components assuming that they all communicate well with each other. However, not all devices are compatible when it comes to the required data.
We regret that we are unable to provide support for converting truck equipment as it is outside our area of expertise. We thoroughly test the baud rate converter before delivery to ensure proper functionality, and we are happy to retest it at the customer's request. However, this is the limit of the support we can provide.
Features
- One CAN Port @ 250k baud
- One CAN Port @ 500k baud
- Input Power Range: 7 VDC to 32 VDC
- Operating Temperature: 0 to 50C - 32 to 122F
Hardware Connection
There are three onboard LEDs: One red LED to indicate power, two green LEDs to indicate data traffic on the corresponding port.
Please note the jumpers J1, J2. They activate the CAN Bus termination resistors. If you connect to an existing functional network, we recommend removing the jumpers. If you connect to a single SAE J1939 device, we strongly recommend activating the termination resistor, and please assure the other device uses a termination resistor as well.
Troubleshooting
If the connection does not work expected, feel free to activate/reactivate the resistors. Furthermore, assure that the devices you connect on either side "understand each other." They speak the same language (i.e., SAE J1939) but that does not mean they deliver the data the other one requires.
Many applications include the addition of modern J1939 devices (such as a display) to an old diesel engine, as shown here.
If you notice that the 500k LED flickers only for a few seconds after power-up and then never again, you might deal with a display operating in so-called Silent Mode. In such case, the baudrate converter does not recognize the display and will cease working after 10 attempts of sending data. Please check the user manual for the 500k device and see whether you can deactivate the Silent Mode (a.k.a. Listen-Only). If that is not possible, the solution will be a bit more complex, and it will require additional hardware (please contact us for more information).
Last but not least, please understand that there are a myriad of SAE J1939 devices and engines in the marketplace. Consequently, we cannot comment on the components you utilize. Our SAE J1939 baudrate converter is a generic device that only does what the name implies.
Notes
- The operating temperature range may require the mounting in a temperature-controlled environment.
- The two CAN ports are not galvanically isolated.
- The converter supports Classical CAN according to ISO 11898-2.0B. It does not support J1939-22 - CAN FD Data Link Layer.
Dimensions
- All dimensions above in mm.
- Base board width: 103 mm / 4"
- Add 10mm / 0.4" to the width for the terminator connectors.
- Width: 53 mm / 2.1 "
- Height: 16 mm / 0.6"
SAE J1939 Starter Kit and Network Simulator
Our SAE J1939 Starter Kit is designed to allow the experienced engineer as well as the beginner to experiment with SAE J1939 data communication without the need of connecting to a real-world J1939 network, i.e. a diesel engine. It may sound obvious, but in order to establish a network, you need at least two nodes, and that fact applies especially to CAN/J1939 where the CAN controller will basically shut down after transmitting data without receiving a response. For that reason, our jCOM.J1939 Starter Kit and Network Simulator consists of two J1939 nodes, namely our jCOM.J1939.USB, an SAE J1939 ECU Simulator Board with USB Port.
