The difference between PROFIBUS Class 1 and Class 2 masters is confusing but essential to figure out. Fortunately, we have compiled everything you need to know into this article.


PROFIBUS Class 1 master

The Class 1 master actively trades data with the slaves, i.e., your field devices. It’s usually a programmable logic controller (PLC), and it sets up the communication speed and controls most of the network. It also offers data passively to Class 2.

PROFIBUS Class 2 master

The Class 2 master acts as a supervisor for the entire system. Normally a laptop or field device, the Class 2 master can pull data from the Class 1 and the slaves. You use it for commissioning, maintenance, and diagnostics. Now why PROFIBUS calls the top dog “Class 2”, I’ll never understand.

If you have any more questions, don’t hesitate to contact our experts. We will help.

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