Beckhoff AX8000 Series Manual page 36

Mechanical Installation
Procedure for applying the protective earth (B):
The following section provides information on the correct installation of the protective earth for a multi-axis
drive system consisting of an AX8620 power supply module and two AX8206 axis modules.
To apply the protective earth (B) proceed as follows:
• Assemble a cable with a annular cable lug and a minimum cross-section of 10 mm².
• Attach the cable lug [3] to the left-hand earthing bolt [4] of the first module of your drive system (the
AX8620 power supply module in this example).
• Now place the supplied hex nut [2] on the cable lug [3] on the earthing bolt (B). Now tighten the hex nut
with a tightening torque of 2.3 Nm.
• The other end of your pre-assembled cabled now has to be properly attached to the mounting plate of
the control cabinet. Ensure that the mounting plate of your control cabinet is unpainted. Clean the
contact surfaces before the installation.
You have successfully connected your protective earth via the earthing bolt [4].
Connecting the protective conductor!
Connect a protective earth conductor cable with an as large as possible cross-section to
the cable lug [4] and connect this to the central protective conductor terminal in the control
cabinet.
Further information on the protective earth conductor can be found in chapter: "Electromag-
netic compatibility [} 10]".
Selection of the hex nuts with flange and serrations:
Only use the following components for establishing the protective conductor connection at the
AX8000 multi-axis servo system:
• Hex nuts with flange and serrations of class 8 (ISO 4161) with zinc plated surfaces.
EMC, earthing, screen connection and potential
The AX8000 multi-axis servo system corresponds to EMC category "C3" (industrial sector) in terms of
conducted interference emissions. If you wish to use components which comply with a higher category you
can limit the AX8000 multi-axis servo system conducted interference emissions with the aid of additional
filters to such a degree that this complies with the EMC category "C2" (residential and industrial
environment). Ensure that there is adequate earthing (large-area low-impedance connection) of all relevant
components (incl. control cabinet). Use pre-assembled Beckhoff motor and feedback cables as these are
optimally adapted to the drive system and reduce interference to a minimum. Ensure that the connectors are
properly connected.
EMC – compatible installation of the AX8000 multi-axis servo system:
For further information of earthing, screen connection and potential please read the EMC –
information brochure. You will find the document on the Beckhoff homepage www.beck-
hoff.com.
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NOTE
NOTE
Version: 1.6 Multi axis servo system AX8000