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Further AS-i System Components

3-3

SIMATIC NET AS-Interface – Introduction and Basic Information

C79000-G8976-C089/03

3.2 AS-i Modules: Blocks of the AS-i Slaves

Concept

Within the AS-i system, the AS-i modules can be compared with input and output

modules. Along with the actuators and sensors they make up the AS-i slaves and

connect the slaves to the AS-i master. The actuators/sensors are connected via

M12 connectors. The pinout corresponds to DIN IEC 947 5-2. The modules with

dimensions of approximately 45 x 45 x 80 mm are used locally on the machine

itself. They are connected via the AS-i cable and have the degree of protection

IP67.

Active and Passive Modules

The following modules must be distinguished:

S The active AS-i module with integrated AS-i chip

Using this, conventional sensors and actuators can be connected. Every normal

actuator or sensor can therefore be networked via AS-i.

S The passive AS-i module

This does not contain its own electronics and allows the connection of AS-i

sensors and actuators with integrated AS-i chips.

In keeping with the concept of the standard AS-i master and the extended AS-i

master (see Section 1.2), either AS-i chips with standard functions or with

extended functions are used.

The modules are designed so that a uniform electromechanical interface to the

AS-i cable can be created. This is achieved with the uniform lower section of the

module, which is therefore also known as a coupling module.

Specially constructed upper module sections, also known as application modules

are also available. The variations in the module components range from the simple

cover for branching the AS-i cable to application modules with integrated AS-i

chips for connecting up to four conventional sensors or actuators.

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Siemens SIMATIC Distributed I/O System DP/ASi Link Manual de servicio Pagina 33