EB 5573-1 EN 127
Electrical connection
12 Electrical connection
DANGER!
Risk of electric shock!
− For electrical installation, you are required to observe the relevant electrotechnical
regulations of the country of use as well as the regulations of the local power sup-
pliers. Make sure all electrical connections are installed by trained and experienced
personnel.
− Before performing any work on the controller, disconnect it from the power supply.
Notes on electric wiring
− Install the 230 V power supply lines and the signal lines separately! To increase immuni-
ty, keep a minimum distance of 10cm between the lines. Make sure the minimum dis-
tance is also kept when the lines are installed in a cabinet.
− The lines for digital signals (bus lines) and analog signals (sensor lines, analog outputs)
must also be installed separately!
− In plants with a high electromagnetic noise level, we recommend using shielded cables
for the analog signal lines. Ground the shield at one side, either at the control cabinet in-
let or outlet, using the largest possible cross-section. Connect the central grounding point
and the PE grounding conductor with a 10mm² cable using the shortest route.
− Inductances in the control cabinet, e.g. contactor coils, are to be equipped with suitable
interference suppressors (RC elements).
− Control cabinet elements with high eld strength, e.g. transformers or frequency convert-
ers, must be shielded with separators providing a good ground connection.
Overvoltage protection
− If signal lines are installed outside buildings or over large distances, make sure appropri-
ate surge or overvoltage protection measures are taken. Such measures are indispens-
able for bus lines.
− The shield of signal lines installed outside buildings must have current conducting capaci-
ty and must be grounded on both sides.
− Surge diverters must be installed at the control cabinet inlet.
To Next Page
Loading...