CAN Bus Adaptor With 9 Pin D-Sub

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For best results, the CAN bus termination should match the nominal impedance of the cable, which is specified as 120 ohms for ISO 11898-2 (High-Speed CAN). Therefore, the 120-ohm terminal adapter is considered the standard for CAN bus.

The Role of Terminating Resistors

1. Improve the anti-interference ability, let the high frequency and low energy signal go away quickly

2. Ensure that the bus quickly enters the recessive state, so that the energy of the parasitic capacitance can go away faster;

3. Improve the signal quality and place it at both ends of the bus to reduce the reflected energy.

Specifications & Features

1. The accuracy and power of the 120 ohm resistor are calculated according to TI's CAN chip communication, so you can use it with confidence;

2. The communication definition of CAN, the second pin is the L signal, and the seventh pin is the H signal. The 120 ohm resistor between the second pin and the seventh pin is used to filter out the echo interference at the bus end and ensure the integrity of the communication protocol;

3. The appearance of the product is exactly the same as that of DB9;

4. The male-to-female interface can be directly inserted into the DB9 pin interface at the back end of the bus analysis, without changing the existing cable;

5. The screws on the DB9 can be removed. The screws are used to fix the ports on the test line. If it is a communication test, it is more convenient to remove the screws and insert them;

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