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What is CANopen?

 

CANopen is a higher-layer protocol based on the CAN (Control Area Network) serial bus system and the CAL (CAN Application Layer). CANopen assumes that the hardware of the connected device has a CAN transceiver and a CAN controller as specified in ISO 11898.

 

The CANopen Communication Profile, CiA DS-301, includes both cyclic and event-driven communication, which makes it possible to reduce the bus load to a minimum while still maintaining extremely short reaction times. High communication performance can be achieved at relatively low baud rates, thus reducing EMC problems and cable costs.

 

The physical medium of CANopen is a differentially-driven two-wire bus line with common return according to ISO 11898. The maximum length of the bus is limited by the communication speed as follows:

 

Baud Rate Max. Bus Length
1M bit/s 25 m
500k bit/s 100m
250k bit/s 250m
125k bit/s 500m
100k bit/s 600m
50k bit/s 1000m

 

The maximum theoretical number of nodes is 127. However, in practice, the maximum number depends on the capabilities of the CAN transceivers used.

"COVID-19; An important message from the directors"

As some of our customers operate in the medical supply chain our factory and online shop are both still open!

These are indeed unprecedented times. At TRM we have taken the necessary steps to comply with the Government's "Anti Virus Measures". Colleagues, where able, are working from home. Our factory is still operating using additional protection and we are also operating an increased level of cleaning.

Our delivery partners APC, Fedex, UPS and DHL are still operating and aim to have your orders delivered to your door as quickly and as safely as possible.

Wishing you and your families well.

 

Contact

TRM International Ltd.
86 Moss Road
Southport, PR8 4JQ, UK.

Tel: +44 (0) 1704 563777

sales@trminternational.com

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