Siemens S7-300 - Applications of SM 336; F-AI 6 X 0;4

Analog modules
9.3 SM 336; F-AI 6 x 0/4 ... 20 mA HART
Fail-safe signal modules
Installation and Operating Manual, 01/2010, A5E00085586-10
229
9.3.3 Applications of SM 336; F-AI 6 x 0/4 ... 20 mA HART
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 and
parameter settings in
STEP 7 .
Applications 1 and 2 are omitted because the module supports only safety mode.
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Figure 9-21 Applications
WARNING
The maximum Safety Integrity Level is determined by the sensor quality and the length of
the proof test interval in accordance with IEC 61508. If the sensor quality does not meet the
requirements of the Safety Integrity Level, wire it to two channels for redundant operation.