Application 8: Safety Mode Sil3/Cat.4/Ple With High Availability (In S7 F/Fh Systems Only) - Siemens S7-300 Installation And Operating Manual

Analog modules
9.3 SM 336; F-AI 6 x 0/4 ... 20 mA HART
9.3.11 Application 8: Safety mode SIL3/Cat.4/PLe with high availability (in S7 F/FH
Systems only)
Introduction
Below are the wiring scheme and the parameter assignment of SM 336; F-AI 6 x 0/4 ... 20
mA HART for
● Application 8: Safety mode SIL3/Cat.4/PLe for "2oo3 evaluation with high availability.
Diagnostic messages, possible causes of the problem and their corrective measures are
found in tables
messages and associated corrective measures for SM 336; F-AI 6 x 0/4 ... 20 mA HART
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, transducer not redundant, for
application 8
Two process signals can be connected to two redundant modules in this interconnection
variant. Three sensors are connected to each module (2oo3 evaluation). Sensor supply Vsn
is provided by the module for 3 channels. The sensors can also be connected to an external
sensor supply (see Figure
... 20 mA HART
(Page 224) ").
You can use interconnection schemes E to H for this application.
Figure 9-36
254
Diagnostic messages of SM 336; F-AI 6 x 0/4 ... 20 mA HART
External sensor supply, 4-wire transducer for SM 336; F-AI 6 x 0/4
in Chapter " Properties, front view, wiring diagram and block diagram
2oo3 evaluation, redundant F-SMs, three-channel transducer
Installation and Operating Manual, 01/2010, A5E00085586-10
Diagnostic
and
in
Fail-safe signal modules