Siemens S7-300 - Application 5: Safety Mode Sil3;Cat.4;Ple

Analog modules
9.3 SM 336; F-AI 6 x 0/4 ... 20 mA HART
Fail-safe signal modules
246 Installation and Operating Manual, 01/2010, A5E00085586-10
9.3.8 Application 5: Safety mode SIL3/Cat.4/PLe
Introduction
Below are the wiring schemes and the parameter assignment of SM 336; F-AI 6 x 0/4 ... 20
mA HART for
● Application 5: Safety mode SIL3/Cat.4/PLe for "1oo2 evaluation.
Diagnostic messages, possible causes of the problem and their corrective measures are
found in tables
Diagnostic messages of SM 336; F-AI 6 x 0/4 ... 20 mA HART and Diagnostic
messages and associated corrective measures for SM 336; F-AI 6 x 0/4 ... 20 mA HART
in
chapter "Diagnostic messages of SM 336; F-AI 6 x 0/4 ... 20 mA HART (Page 257)".
Current measurement 0/4 to 20 mA with 2-wire and 4-wire transducer for application 5
Three process signals can be connected to a module in this interconnection variant. Sensor
supply Vsn is provided by the module for 3 channels. The sensors can also be connected to
an external sensor supply (see Figure
External sensor supply, 2-wire transducer for
SM 336; F-AI 6 x 0/4 ... 20 mA HART
in Chapter " Properties, front view, wiring diagram and
block diagram (Page 224) ").
You can use interconnection
schemes A to D for this application.
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WARNING
To achieve SIL3/Cat.4/PLe using this wiring, you must use a suitably qualified sensor.