
General Information
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SIMATIC NET Twisted-Pair and Fiber-Optic Networks
C79000-G8976-C125-02
1.2.1 The SIMATIC NET Communication Systems
To handle the wide variety of tasks in automation engineering, SIMATIC NET
provides different communication networks to suit the particular situation.
The topology of rooms, buildings, factories, and complete company complexes and
the prevalent environmental conditions mean different requirements.
The networked automation components also make different demands on the
communication system. To meet these various requirements, SIMATIC NET
provides the following communication networks complying with national and
international standards:
S AS-interface
The Actuator-Sensor interface (AS-i) for automation at the lowest
automation level for connecting binary actuators and sensors to programmable
controllers via the AS-i bus cable.
S PROFIBUS
A communication network for the cell and field area complying with the
PROFIBUS standard EN 50170-1-2 or IEC 61158-2 with the hybrid medium
access technique token bus and master-slave. This network is operated on a
twisted-pair or fiber-optic cable.
S Industrial Ethernet
A communication network for the cell area using baseband technology
complying with IEEE 802.3 and using the CSMA/CD medium access method.
The network is operated at a transmission rate of 10 Mbps on triaxial cable,
glass fiber-optic cable, or shielded twisted pair cable.
S Fast Industrial Ethernet
A communication network with a transmission rate of 100 Mbps.
This network is implemented using glass fiber-optic cable or shielded twisted
pair cable.
The various SIMATIC NET communication systems can be used alone or
combined with the other systems.
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