Rockwell Automation 1336S Plus FRN 1.xx-5.xx - Manual (Page 18)

2–8 Installation/Wiring
1336 PLUS drives can be installed with an RFI filter, which controls
radio-frequency conducted emissions into the main supply lines and
ground wiring.
If the cabling and installation recommendation precautions described
in this manual are adhered to, it is unlikely that interference
problems will occur when the drive is used with conventional
industrial electronic circuits and systems. However, a filter may be
required if there is a likelihood of sensitive devices or circuits being
installed on the same AC supply.
Where it is essential that very low emission levels must be achieved
or if conformity with standards is required the optional RFI filter
must be used. Refer to Appendix C and instructions included with the
filter for installation and grounding information.
Refer to Appendix C.
Refer to the grounding diagram on page 2–10. The drive must be
connected to system ground at the power ground (PE) terminal
provided on the power terminal block (TB1). Ground impedance
must conform to the requirements of national and local industrial
safety regulations (NEC, VDE 0160, BSI, etc.) and should be
inspected and tested at appropriate and regular intervals.
In any cabinet, a single, low-impedance ground point or ground bus
bar should be used. All circuits should be grounded independently
and directly. The AC supply ground conductor should also be
connected directly to this ground point or bus bar.
Sensitive Circuits
It is essential to define the paths through which the high frequency
ground currents flow. This will assure that sensitive circuits do not
share a path with such current. Control and signal conductors should
not be run near or parallel to power conductors.
Motor Cable
The ground conductor of the motor cable (drive end) must be
connected directly to the drive ground (PE) terminal, not to the
enclosure bus bar. Grounding directly to the drive (and filter, if
installed) can provide a direct route for high frequency current
returning from the motor frame and ground conductor. At the motor
end, the ground conductor should also be connected to the motor
case ground.
If shielded or armored cables are used, the shield/armor should also
be grounded at both ends as described above.
RFI Filtering
CE Conformity
Grounding