PROFIsafe

PROFIsafe was the first communications standard to safety standard IEC 61508 that permits both standard and fail-safe communications on one bus line.

Numerous manufacturers of safety components and end users of safety technology have helped develop this vendor-independent and open standard for PROFIBUS International (PI). PROFIsafe is defined in IEC61784-3-3 as an international standard.

The PROFIsafe profile allows fail-safe communications for the open standard buses PROFIBUS and PROFINET on the basis of standard network components.

PROFIBUS DP:
For fast, cyclic data exchange with field devices
PROFIBUS PA:
For process automation applications in intrinsically safe areas
PROFINET:
Open Industrial Ethernet standard for integrated communication from the office down to the field level.

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In connection with PROFINET, PROFIsafe also supports fail-safe wireless communications via IWLAN.

Fail-safe and standard data is transferred using PROFIsafe via the same bus line.This not only results in an enormous savings potential with regard to cabling and the required number of parts, but also the advantage of retrofitting. The black channel indicates that fail-safe communication is independent of the bus system and the underlying network components.

The aspect of availability represents a basic prerequisite for safety. As part of the PROFIBUS-/PROFINET activities, PROFIsafe uses tried-and-tested procedures in terms of tests, certifications and installation directives and thus guarantees maximum availability. Certified devices which are installed in accordance with the applicable directive support the user with the safety-relevant acceptance of his systems.

Detailed diagnostics functions facilitate preventive measures for a maintained high availability until the system’s or machine’s lifecycle end.

Advantages:

Simple and efficient system layout with integrated technology
Programming of both standard and fail-safe applications with only one tool
High flexibility in terms of installation and expansion of existing installations (retrofits)
Training, documentation and maintenance for only one bus technology
Broad portfolio of certified products and function blocks for eased system acceptance
PROFIsafe supports new, innovative device functions such as fail-safe communication via IWLAN
International acceptance
Easy migration of PROFIBUS to PROFINET thanks to the “black channel” principle

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