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Product overview
2.1
Integration in the automation landscape
Distributed I/O Devices - Field of Application
When a system is configured, the inputs and outputs from and to the process are often
integrated centrally in the automation system.
In the case of greater distances of the inputs and outputs from the automation system, the
wiring may be very extensive and confusing. Electromagnetic interference may impair
reliability.
Distributed I/O is suitable for use with systems of this kind.
● The PROFIBUS DP master is located in a central position.
● The I/O devices (inputs and outputs) operate locally and decentralized.
What is PROFIBUS DP?
PROFIBUS DP is an open bus system to IEC 61784-1 CP 3/1 with "DP" transmission protocol
(DP stands for Distributed Peripherals).
Physically PROFIBUS DP is implemented either as an electrical network based on shielded
twisted-pair cables, or as an optical network based on fiber optic cable.
The "DP" transmission protocol enables cyclic data exchange between the controller CPU and
the distributed I/O devices.
What is FOUNDATION Fieldbus?
The FOUNDATION Fieldbus (here FF-H1 bus) is an open bus system that permits the use of
field devices from different manufacturers within one system. In many aspects, the design of
an FF system corresponds to the IEC fieldbus model. The FF-H1 bus conforms to its
specifications in IEC 61158-2.
The FF-H1 bus transmission conforms to the international standard IEC 61784‑1 CP 1/1.
The FF-H1 bus can even be used in hazardous areas. The FF-H1 bus enables transmitters
and actuators in safe and hazardous areas to communicate with the automation system over
long distances. With the FF-H1 bus, the field devices can be be simultaneously supplied power
via the data cable.
Compact FF Link
Operating Instructions, 03/2015, A5E35651552-AA
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