User's Manual
Introduction / product description
1.2 Fieldbus interfaces
M200D AS-Interface Basic
Manual, 03/2009, A5E01668085-01
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1.2 Fieldbus interfaces
1.2.1 AS-Interface
Overview
The AS-Interface (actuator sensor interface, AS-i) is an open international standard for
fieldbus communication between distributed actuators and sensors at the lowest control
level.
AS-i complies with the IEC 61158 / EN 50295 standards and was specifically designed for
connecting binary sensors and actuators that comply with these standards. AS-i makes it
possible to replace point-to-point cabling of the sensors and actuators by a bus line.
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Figure 1-2 Example: M200D AS-i
The AS-Interface has the following advantages:
● Flexibility
● Cost effectiveness
● Simple and rapid installation with a minimum of errors
● A common line for transferring data and power