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Electrical connection
3.1
Installation notes
NOTE!
These installation notes apply for the entire automation system and, on some occasions, are only appli-
cable for a specific module. The respective connection diagram shows the context.
Requirements for personnel
•
Work on the modules must only be carried out to the extent described and, like the electrical con-
nection, only by qualified personnel.
•
Before plugging and unplugging connecting cables, it must be ensured that the acting person is elec-
trostatically discharged (e.g. by touching grounded metallic parts).
Cables, shielding, and grounding
•
When selecting the cable material, when installing, and when performing the electrical connection of
the module, the regulations of DIN VDE 0100 "Erection of low voltage installations" or the respective
national regulations (e.g. on the basis of IEC 60364) are to be observed.
•
At maximum load, certain cables must be heat resistant up to at least 80 °C. The corresponding
notes in the connection diagram of the affected modules must be observed.
•
Route input, output, and supply lines separately and not parallel to one another.
•
Only use shielded and twisted probe and interface cables. Do not route the lines close to current-
carrying components or cables.
•
For temperature probes, ground the shielding on one side in the control cabinet.
•
Do not perform loopthroughs on the grounding cables, but instead route the cables individually to a
shared grounding point in the control cabinet. In doing so, ensure that the cables are as short as pos-
sible.
Ensure that the potential equalization is correct.
Electrical safety
•
Isolate power supply units from the voltage supply on the primary side if there is a risk of touching
parts with dangerous electrical voltage (e.g. 230 V) during active use.
•
The fuse rating of the power supply units on the primary side should not exceed a value of 10 A (in-
ert).
•
With modules that have relay or solid state relay outputs, the load circuits can be operated with a
dangerous electrical voltage (e.g. 230 V). Disconnect load circuits from the voltage supply during in-
stallation/dismounting and electrical connection.
•
In order to prevent the destruction of the relay or solid state relay outputs in the event of an external
short circuit in the load circuit, the load circuit should be fuse-protected to the maximum admissible
output current.
•
The modules are not suitable for installation in potentially explosive areas.
•
In addition to a faulty installation, incorrectly set values on the module could also impair the correct
function of the following process. Therefore, ensure that safety devices independent of the module
(e.g. overpressure valves or temperature limiters/monitors) are available and that it is only possible
for qualified personnel to define settings. Please observe the corresponding safety regulations in this
context.
References to other information
•
The electromagnetic compatibility meets the standards and regulations cited in the technical data.
•
Sometimes USB interface and power supply are not electrically isolated. In general, please observe
the device-specific information on galvanic isolation.
3 Electrical connection
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