Technical Advantages Of Profisafe - Siemens SITRANS P DS III Operating Instructions Manual

Functional safety
8.7 PROFIsafe
8.7.2

Technical advantages of PROFIsafe

The main advantage of PROFIsafe is that the PROFIBUS communication channel becomes
secured by a protocol in a transparent way. Thus incorrect values cannot be transferred to
the master without being discovered. The user does not need any special network
components. All the user needs is the standard network components of PROFIBUS.
However, the CPU must be suitable for safety applications.
In the following example, you see that PROFIsafe and PROFIBUS devices can be operated
simultaneously on a PROFIBUS network.
Figure 8-3
See also
PI PROFIBUS - PROFINET (http://www.profibus.com/home/)
136
Example of PROFIsafe communication
SITRANS P DS III with PROFIBUS PA
Operating Instructions, 06/2013, A5E00053276-07