Rockwell Automation 7000 PowerFlex AC Drive with Direct-to-Drive Technology - Manual (Page 9)

Re-installing a Separately Shipped Common Mode Choke (CMC) • Installation Instructions 5
Publication 7000-IN003B-EN-P – June 2013
Preparing the CMC Cabinet The CMC mounts to the floor of the CMC Cabinet Section by four
bolts near each corner of the CMC (see Figure 4). The bolts and
hardware are preinstalled in the CMC Cabinet Section. The CMC
Isolation Mounting Strips are also secured by these bolts for shipping (see
Figure 14). Make sure to remove the washers, nuts, and mounting strips
first (leave the 4 bolts in place). The front and rear pair of bolts are
mounted in horizontal slots across the front and across the rear of the
cabinet to allow for slight left-to-right movement. This makes it easier to
mate the bolts to the holes in the base of the CMC assembly.
Figure 4 – Mounting detail of CMC to cabinet floor
The six (6) supplied black rubber CMC Isolation Mounting Strips
(approx. 3” wide x ¼” thick) must be placed between the CMC Cabinet
floor and the CMC to reduce noise due to vibration. Two layers are
placed between the front pair and rear pair of mounting bolts (over the
horizontal slots), and single layers are placed under each of the two weld
straps (parallel to the pair of mounting bolt strips) towards the center of
the CMC. Measure the position of the weld straps and pre-position these
strips (see Figures 5 and 6) on the floor of the CMC Cabinet before the
installation of the CMC.
Figure 5 – Positioning of CMC Isolation Mounting Strips