Fast and secure data transmission

Fast and secure data transmission

The INTERBUS communication system has enjoyed worldwide success in machine and system engineering for over 20 years.

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INTERBUS, the open fieldbus system, uniformly connects all process peripherals to all common controllers. The serial bus cable is used to network sensors and actuators, control machines and system parts, and connect higher-level systems. Phoenix Contact offers a large selection of protocol chips for implementing INTERBUS slave and master interfaces.

Your advantages

  • Easy installation and startup, thanks to automatic configuration of all devices present in the ring
  • Increased system availability, thanks to precise and clear error diagnostics
  • Reliable data transmission, thanks to the physical structure
  • Space saving: smallest protocol chips available in fieldbus technology
  • High level of immunity to electromagnetic interference, thanks to stable data transmission
  • High protocol efficiency – information is transmitted with low protocol overhead

INTERBUS for modern automation

Wide range of INTERBUS components  

Wide range of INTERBUS components

Through its development of INTERBUS, Phoenix Contact has established an industry standard. We offer all the necessary components for complete system configuration, such as INTERBUS I/O modules, special function modules, and controllers.

With the new generation of INTERBUS interface solutions, you are able to meet the constantly growing demands placed on automation technology. Implement slave and master functions with ASIC (application-specific integrated circuit) or FPGA (Field Programmable Gate Array) solutions from Phoenix Contact. You can therefore ensure that the INTERBUS technology for your system remains both available in the long term and inexpensive.

Master/slave structure

The SUPI4 protocol chip  

The SUPI4 protocol chip

Discover new possibilities: implement your INTERBUS solution quickly with the compact slave protocol chip.

Devices which support the maximum data width of INTERBUS can be integrated using the SUPI4 slave protocol chip. This eliminates the need for register expansion. The baud rate is detected automatically and does not have to be adjusted further.

Furthermore, Phoenix Contact provides full INTERBUS diagnostics. Diagnostics via an external microcontroller is now a thing of the past.

All versions for implementing the INTERBUS master are available:

  • INTERBUS master protocol chip
  • FPGA solution

Further information


C6 The Exchange
Calmount Park
Dublin 12
D12 XE18



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