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AS-Interface (AS-i)

1-11

SIMATIC NET AS-Interface – Introduction and Basic Information

C79000-G8976-C089/03

Special modules allow each of these bits to be used for a binary actuator or

a binary sensor. This means that an AS-i cable with standard AS-i slaves

can have a maximum of 248 binary attachments (124 inputs and 124

outputs). All typical actuators or sensors can be connected to the

AS-interface in this way. The modules are used as distributed inputs/outputs.

If modules with the extended addressing mode are used, a maximum of 3

inputs and 3 outputs is available per module; in other words a maximum of

248 inputs and 186 outputs can be operated with modules using the

extended addressing mode.

Range of Functions of the Master Modules

The functions of the AS-i master modules are stipulated in the AS-i master

specification (see /1/ and /2/). An overview of these functions can be found in the

PICS in the appendix of the master module manual.

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