Analog modules
9.2 SM 336; AI 6 x 13 Bit
Fail-safe signal modules
Installation and Operating Manual, 01/2010, A5E00085586-10
207
Wiring scheme A, current measurement 4 to 20 mA with 2-wire transducer for application 5
You can interconnect six process signals with an analog module. Two redundant sensors are
connected to two
opposite inputs
of the analog module for each process signal (1oo2
evaluation). Sensor supply V
S
is provided by the analog module for 6 channels. The sensors
can also be connected to an external sensor supply (see figure
External sensor supply, 2-
wire transducer for SM 336; AI 6 x 13Bit
in chapter "Properties, front view, wiring diagram
and block diagram (Page 184)").
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Figure 9-15 Current measurement 4 to 20 mA, 2-wire transducer for application 5 with
SM 336; AI 6 x 13Bit
WARNING
To achieve SIL3/Cat.4/PLe using this wiring, you must use a suitably qualified sensor and it
may require an 1oo2 evaluation.
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