Compact controller ER 2022S and ER 2022SA
4. Electric connections
4.1
Installations notes
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The choice of cable, the installation and the electrical connection must
conform to the requirements of VDE 0100 “Regulations on the Installation of
power circuits with nominal voltages below 1000 V” or the appropriate
local regulations.
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Qualified personnel must only conduct the electrical connection.
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If contact with live parts is possible while working on the unit, it must be
disconnected from the supply on both poles.
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The load circuit must always be fused for the maximum relay current, to prevent
the output relay contacts becoming welded in the event of a short circuit.
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Electromagnetic compatibility conforms to the standards and regulations cited in
the technical data.
Chapter 12. “Technical data”
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Run input, output, and supply cables separately and not parallel to one another.
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Sensor and interface cables must always be shielded cables with twisted
conductors.
Do not run them close to current-carrying components or cables. Ground the
shielding on one side.
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Do not connect any additional loads to the supply terminals of the instrument.
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The instrument is not suitable for use in areas with an explosion hazard
(Ex areas). In addition to faulty installation, incorrect settings on the controller
(setpoint, data of the parameter and configuration levels, internal alterations)
can also interfere with the correct operation of dependent processes, or even
cause damage.
Safety devices must always be provided so that they are independent of
the controller (such as overpressure valves or temperature limiters/monitors)
and only capable of adjustment by specialist personnel. Please observe the
relevant safety regulations for such matters. Since adaptation (self-optimization)
can not be expected to manage all control loops, and if unstable
parameterization theoretically is possible.
The stability of the actual value that is produced should therefore be checked.
V
carried out by specialist personnel
The instrument version can be
determined by the type of code.
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