Rockwell Automation 2090-SRxxx External Shunt Modules Installation Instructions - Manual (Page 4)

Publication 2090-IN004B-EN-P — June 2008
4 External Shunt Modules
Mounting Requirements
These requirements apply when preparing to mount your shunt
module:
•
Mount the shunt in an enclosure providing protection against
dust and splashing water (IP54), or dust free and protected
against water jets (IP65).
Many NEMA (National Electrical Manufacturers Association)
Type 4 cabinets provide this level of protection.
•
Install the panel for mounting your system components inside
the enclosure on a flat, rigid, vertical surface that won’t be
subjected to shock, vibration, moisture, oil mist, dust, or
corrosive vapors.
Refer to Environmental Specifications on page 21 for specific
recommendations.
•
Maintain minimum clearances for proper airflow, easy module
access, and proper bend radius for the cables as shown in the
figures beginning on
page 5 .
•
Use high-frequency (HF) bonding techniques to connect the
module, enclosure, machine frame, and motor housing, and to
provide a low-impedance return path for high-frequency (HF)
energy and reduce electrical noise.
Refer to HF Bonding Your Shunt Module , on page 6 , for more
information.
•
Segregate DC-bus wiring from control wiring and motor
feedback cables. Do not run shunt wiring in wireways. Use
twisted pair cable from the drive to external shunt module.
Refer to Establishing Noise Zones , beginning on page 6 , for
specific recommendations.
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.