Rockwell Automation 1321-M055 Common Mode Choke - Manual

Installation Instructions
1321-M055 Common Mode Choke
Where this Option is Used
The 1321-M055 common mode choke option can be installed with adjustable frequency AC drives. When installed at the
drive output, the common mode choke helps to guard against interference with other electrical equipment (programmable
controllers, sensors, analog circuits, etc.). In addition, reducing the PWM carrier frequency reduces the effects and lowers
the risk of common mode noise interference.
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What this Kit Includes
This kit includes these components:
• One common mode choke (1321-M055)
• Two mounting brackets
• Two tie wraps
Before You Install
All choke assemblies should be mounted as close to the bottom of the drive as possible while leaving sufficient distance
between the choke assembly and the drive unit to provide clearance for cables and leads installed at the drive. It is
recommended that the choke be tie wrapped to a solid object such as cabinet sheet metal or brackets when wiring is
completed.
ATTENTION: Only qualified personnel familiar with adjustable frequency AC drives and associated machinery can plan or
implement the installation, startup, and subsequent maintenance of the system. Failure to comply can result in personal injury
and/or equipment damage.
254.5 mm (10.0 in.)
38.6 mm
(1.5 in.)
19 mm
(0.75 in.)
Min.