AS-Interface – the clever field bus standard

Why AS-Interface?

AS-Interface (AS-i) connects sensors and actuators at the lowest field level to your control system, bringing ease, safety and integration to industrial automation. This open standard adheres to IEC 62026-2.

Connecting many sensors and actuators to a central control system is often complex and costly. AS-i simplifies this by providing a cost-effective feeder for PROFINET or other fieldbus systems, allowing you to install I/O modules quickly and flexibly onto a two-wire bus line for reliable wiring.

Key benefits

Simplify operations

Experience simplified operations with AS-Interface, connecting sensors and actuators with ease. Enhance safety across your field level and achieve seamless integration with superior control systems for efficient processes.

Reduce costs

Lower your operational expenses by utilizing AS-Interface as a cost-favorable feeder for PROFINET or other higher-level fieldbus systems. Optimize your network infrastructure for economic efficiency and performance.

Save set-up time

Configure your system easily within TIA Portal, saving time and effort. Rely on a standardized open system, ensuring all components are tested for dependable operation.

Featured capabilities

Flexible installation

Install AS-i I/O modules quickly and flexibly by simply plugging them onto the bus line. Utilize standard and fail-safe data on the AS-i two-wire line for reliable wiring across any application.

A diagram showing the Siemens Automation System with various components and connections.

Seamless integration

Integrate AS-i modules seamlessly into SIMATIC ET 200SP and TIA Portal. Benefit from integrated system diagnostics for AS-i networks and easy extension of multiple AS-i networks or AS-i Safety within a SIMATIC ET 200SP station.

An infographic about AS-Interface technology showing its components and benefits.

Rigorously tested

This open standard is compliant with IEC 62026-2, ensuring all components meet AS-i specifications and are thoroughly tested and certified for reliable operation.