Rockwell Automation 2090-XBxxx Resistive Brake Module Installation Instructions - Manual (Page 4)

Publication 2090-IN009F-EN-P — November 2004
4 Resistive Brake Module Installation Instructions
System Mounting Requirements
There are several things that you need to take into account when preparing to
mount the Resistive Brake Module:
• The panel on which you install your components must be a flat, rigid,
vertical surface that is not subject to shock, vibration, moisture, oil mist,
dust, or corrosive vapors.
• The RBM must be enclosed in a grounded conductive enclosure offering
protection as defined in standard EN 60529 (IEC 529) to IP55 such that it
is 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 RBM
must not exceed 50° C (122° F).
• You need to maintain minimum clearances (refer to Figure 2 and 3) for
proper airflow, easy module access, and proper cable bend radius.
• The RBM can operate at elevations to 1500 m (5000 ft) without derating,
however, the continuous current rating must be de-rated by 3% for each
additional 300 m (1000 ft) up to 3000 m (10,000 ft). Consult your local
Allen-Bradley representative prior to operating at over 3000 m (10,000 ft).
Refer to Specifications on page 19 for mounting dimensions, power dissipation,
and environmental specifications for the RBM.
IMPORTANT
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.
ATTENTION
!
We recommend that all equipment and components of
a machine or process system have a common earth
ground point connected to their chassis.
A grounded system provides a ground path for short
circuit protection. Grounding your modules and panels
minimizes the shock hazard to personnel and damage
to equipment caused by short circuits, transient
overvoltages, and accidental connection of energized
conductors to the equipment chassis.
For CE grounding requirements, refer to the
appropriate drive system installation manual listed in
Related Documentation.