Rockwell Automation 9VT201-007HTNNN, User Manual, Page: 31 / 224

Installation/Wiring 1-17
Publication 9VT-UM001D-EN-P
Output Contactor/Disconnect Precaution
Bypass Contactor Precaution
!
ATTENTION: To guard against drive damage when using output
contactors or disconnects, the following information must be read and
understood. One or more output contactors or disconnects may be
installed between the drive and motor(s) for the purpose of
disconnecting or isolating certain motors/loads. If a contactor or
disconnect is opened while the drive is operating, power will be
removed from the respective motor, but the drive will continue to
produce voltage at the output terminals. In addition, reconnecting a
motor to an active drive (by closing the contactor or disconnect) could
produce excessive current that may cause the drive to fault. If any of
these conditions are determined to be undesirable or unsafe, an
auxiliary contact on the output contactor or disconnect should be wired
to a drive digital input that is programmed as “Enable.” This will cause
the drive to execute a coast-to-stop (cease output) whenever an output
contactor or disconnect is opened.
!
ATTENTION: An incorrectly applied or installed bypass system can
result in component damage or reduction in product life. The most
common causes are:
•
Wiring AC line to drive output or control terminals.
•
Improper bypass or output circuits not approved by Rockwell
Automation.
•
Output circuits which do not connect directly to the motor.
Contact Rockwell Automation for assistance with application or
wiring.