Applications For 4/8 F-Di 24 Vdc Profisafe Digital Electronic Module - Siemens SIMATIC ET 200S Installation And Operating Manual

Fail-Safe Modules
7.5 4/8 F-DI VDC24V PROFIsafe Digital Electronic Module
7.5.5

Applications for 4/8 F-DI 24 VDC PROFIsafe Digital Electronic Module

Selecting the Application
The following figure provides information to help you select the application that corresponds
to your fail-safe requirements. The following chapters provide instructions for each
application on wiring the F-module and requirements for specific parameter settings in
STEP 7
AK4/SIL 2/Cat.3
See case
Figure 7-19
Warning
The achievable safety class depends on the sensor quality and the size of the proof test
interval in accordance with IEC 61508. If the sensor quality is less that the required safety
class, the sensor must be installed redundantly and connected over two channels.
7-54
.
Required safety
class?
AK 6/SIL3/Cat.3
Use cases 1 to 3
1 2
See cases
1
2.1
2.2
2.3
Selecting a Use Case - 4/8 F-DI DC24V PROFIsafe Electronic Module
AK6/SIL3/Cat.4
3
See cases
3.1
3.2
ET 200S Distributed I/O System - Fail-Safe Modules
Hardware Installation and Operating Manual, 07/2005, A5E00103686-04