Cabling; Profinet Io Device Classes - WAGO -I/O-SYSTEM 750 Manual

132 Fieldbus Communication
A high standard of quality is ensured through inspections conforming to standards
carried out within the PROFINET network and the certification of PROFINET
devices.
More information on PROFIBUS and PROFINET!
Much more information on PROFIBUS and PROFINET such as technical
descriptions and guidelines is available on the web site of the "PROFIBUS &
PROFINET International (PI)" umbrella organization at: www.profibus.com.
11.2.2

Cabling

A network for PROFINET IO is based on fast ETHERNET transmission at 100
Mbit/s over cooper lines or fiber optic cables in star, tree, line or ring topology.
If PROFINET fieldbus nodes have integrated switches, a network for PROFINET
IO can be set up in a linear structure.
If the connection between two field devices by integrated switches in a line
(similar to PROFIBUS) is interrupted, the field devices located after the
interruption are no longer accessible. To ensure the high availability of nodes in
an automation system, redundant communication paths should be considered
during system planning.
More information on PROFINET cabling!
A description of PROFINET cabling is available in the "PROFINET Installation
Guide". The guide is available for download free of charge on the PROFIBUS
user organization web site: www.profibus.com.
11.2.3

PROFINET IO Device Classes

With PROFINET IO, process data is exchanged based on the provider/consumer
model. The provider gives the process data to a consumer for processing (PLC
with an application program or IO controller). The same applies in the opposite
direction (output data of the IO controller to the IO device).
The following device classes are defined for better structuring of field devices in
PROFINET IO:
• IO Supervisor
• IO controller
• IO Device
750-375 PROFINET IO advanced Fieldbus Coupler
WAGO-I/O-SYSTEM 750
Manual
Version 1.1.0