Rockwell Automation 1336Z SPIDER - FRN 2.xxx-5.xxx - Manual (Page 16)

2–6 General Installation for All Drives
The drive has a small common mode choke in the power output (U, V
& W). On installations that do not use shielded cable, additional
common mode chokes can help reduce common mode noise at the
drive output. Common mode chokes can also be used on analog or
communication cables. Refer to page 2–13 for further information.
An RFI filter can be used and in most situations provides an effective
reduction of RFI emissions that may be conducted into the main
supply lines.
If the installation combines a drive with sensitive devices or circuits,
it is recommended that the lowest possible drive PWM carrier
frequency be programmed.
RFI Filtering 1336 SPIDER drives can be ordered with an integral 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 for installation and grounding information.
CE Conformity Refer to Appendix C.
Grounding Refer to the grounding diagram on page 2–8. The drive must be
connected to system ground at the power ground (PE) terminal.
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.