Advantages of our I/O modules

Even with just three or more I/O field modules or three I/O stations, AS-Interface offers cost advantages over all other fieldbus systems.

Advantages of our IP20 modules

Use of I/O modules from Bihl+Wiedemann saves hardware costs and control cabinet space.

  • Reduced hardware costs (incl. connector construction)

neither bus couplers nor fieldbus plugs (always one per station) are necessary; instead you need just one Gateway for the entire system.

  • Save valuable control cabinet space

Bihl+Wiedemann modules combine up to 8 inputs and 8 outputs in a 22.5 mm wide housing.

  • Reduced wiring complexity

Bihl+Wiedemann modules can also be installed in the control cabinet right where the signals are actually needed. I/O Modules can also be installed remotely in the control cabinet.

Advantages of our IP67 I/O modules

Using I/O modules with IP67 protection saves hardware and installation costs.

  • Clear savings in hardware and installation costs

You don’t need either plugs for connecting to the power supply or cumbersome self-assembled fieldbus connectors (2 per fieldbus module). Instead the I/O modules are simply connected using the familiar yellow cable and piercing technique.

  • Organized installation with ASi modules

In contrast to IP67 modules in comparable fieldbus solutions, which have to be wired in a line, the I/O Modules from Bihl+Wiedemann allow tree structure as a flexible cabling method. This means stubs from the main string can be created anywhere, also enhancing transparency in the network

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Self-configuring I/O modules

The modules can be used flexibly and are cost-effective, making them a good alternative to comparable Ethernet or IO-Link-based I/O solutions.

I/O modules are also available in the webshop

Discover our wide range of I/O modules, all compatible with the current ASi-3 and/or ASi-5 standard.


The standardized fieldbus system AS-Interface (ASi) helps you drastically reduce your wiring complexity. You also benefit from free choice of topology and cost-effective integration of safety features on the same infrastructure.

Do you have questions about our products and solutions?

ASi – A resource-saving technology

Thanks to the greatly reduced wiring effort with AS-Interface, you save assembly and material costs. This saves valuable resources.


More information!