Endress+Hauser RIA 550 Manual De Utilización página 27

Connections/examples
AC-version
4.3 Loop power supply connection
The unit has two loop power supplies that are both
galvanically isolated from the signal inputs. This
means that transmitters can be directly powered from
the unit with the need for further components
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Loop power supply con-
nection
4.4 External sensor connection
If there is a possibility of electrical transients on the
signal cables we recommend the use of an over
voltage protection unit.
Terminals not used are not shown in the connection
diagrams.
In order to make them easier to understand the
following connection diagrams show only signal input
1 connected. Input 2 is connected identically.
DC-version
Process display
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