Rockwell Automation 8720MC High Performance Drives Installation Manual - Manual (Page 19)

Publication 8720MC-IN001D-EN-P — December 2002
Installing Your 8720MC Drive 1-7
System Mounting Requirements
There are several things that you need to take into account when
preparing to mount the 8720MC:
• The 8720MC must be enclosed in a grounded conductive
enclosure offering protection as defined in standard EN 60529
(IEC 529) to IP55 such that they are not accessible to an operator
or unskilled person, in order to comply with UL

and CE
requirements. A NEMA 4X enclosure exceeds these requirements
providing protection to IP66.
• The ambient temperature of the enclosure in which you install the
8720MC must not exceed 50° C (122° F).
• The panel you install inside the enclosure for mounting your
system components must be on a flat, rigid, vertical surface that
won’t be subjected to shock, vibration, moisture, oil mist, dust, or
corrosive vapors.
• You need to maintain minimum clearances (refer to Figure 1.3) for
proper airflow, easy module access, and proper cable bend radius.
• The 8720MC can operate at elevations to 1000 m (3280 ft) without
derating, however, the continuous current rating must be de-rated
by 3% for each additional 300 m (984 ft) up to 3000 m (9842 ft).
Consult your local Allen-Bradley representative prior to operating
above 3000 m (9842 ft).
Refer to Appendix A for mounting dimensions, power dissipation, and
environmental specifications for the 8720MC.
ATTENTION
!
Plan the installation of your system so that you can
perform all cutting, drilling, tapping, and welding
with the system removed from the enclosure.
Because the system is of the open type construction,
be careful to keep any metal debris from falling into
it. Metal debris or other foreign matter can become
lodged in the circuitry, which can result in damage to
components.