K-bus (PLC)

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The K-bus (also called communication bus ) is a term in IT technology that is characterized by automation technology . An extensive exchange of data takes place via a K-bus.

In PLC technology, this bus is used to exchange data between the CPU of a programmable logic controller (PLC) and its associated functional and communication modules. The K-bus is to be regarded as an internal bus of a PLC that has no external interfaces. It is therefore only used to transport the necessary amounts of data within a PLC. However, this bus has no meaning for the data exchange between the CPU of a PLC and its connected input and output modules. The P-bus (peripheral bus) is used for this.

The term K-Bus is also used outside of PLC technology. An example of this are bus terminals that can be mounted in series, which also use a K-bus. The data between the individual bus terminals (e.g. digital input and output terminals) and the associated bus coupler are exchanged via this K-bus. The bus coupler provides an interface for other connected peripherals (e.g. CAN bus , Profibus, etc.)

See also

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  • Siemens SIMATIC S7, Beckhoff fieldbus components Bus Terminals