Use Cases For The Sm 326; Di 24 24V Dc - Siemens S7-300 Installation And Operating Manual

Digital modules
8.3 SM 326; DI 24 x DC 24V
8.3.2

Use cases for the SM 326; DI 24 24V DC

Selecting the application
The figure below helps you to select an application based on availability and fail-safe
operation requirements. The next pages provide information on the module wiring for a
specific application, and on the parameters to set in
S7 F Systems
or
Figure 8-6 SM 326; DI 24 x DC 24V - Selecting an application
The maximum Safety Integrity Level is determined by the sensor quality and the length of
the proof-test interval to IEC 61508. Always wire sensors whose quality does not meet
Safety Integrity Level requirements redundantly to two channels.
Note
You can define 1oo1 and 1oo2 sensor evaluation for a module (for example, see table
326; DI 24 x DC 24V: Example of channel configuration
wiring diagram and block diagram
82
optional package.
WARNING
STEP 7
in the chapter
).
Installation and Operating Manual, 01/2010, A5E00085586-10
S7 Distributed Safety
using the
Properties, front View,
Fail-safe signal modules
SM