Rockwell Automation 20D PowerFlex 700S AC Drives with Phase II Control Reference Manual - Manual (Page 74)

74 Rockwell Automation Publication PFLEX-RM003E-EN-E - January 2011
Chapter 1 Detailed Drive Operation
Motor Start and Stop
Precautions Input Contactor Precautions
Output Contactor Precaution
Mounting As a general rule, drives should be mounted on a metallic flat surface in the
vertical orientation. If considering another orientation, contact the Factory for
additional data. Refer to the
PowerFlex 700S AC Drive Phase II Control Frames
1…6 Installation Instructions, publication 20D-IN024 or the PowerFlex 700H
and 700S Frame 9…14 Drives Installation Manual, publication PFLEX-IN006 ,
for mounting instructions and limitations.
ATTENTION: A contactor or other device that routinely disconnects and
reapplies the AC line to the drive to start and stop the motor can cause
drive hardware damage. The drive is designed to use control input signals
that will start and stop the motor. If an input device is used, operation
must not exceed one cycle per minute or drive damage will occur.
ATTENTION: The drive stop/enable control circuitry includes solid state
components. If hazards due to accidental contact with moving machinery
or unintentional flow of liquid, gas or solids exist, an additional hardwired
stop circuit may be required to remove the AC line to the drive. An
auxiliary braking method may be required.
ATTENTION: To guard against drive damage when using output
contactors, the following information must be read and understood. One or
more output contactors may be installed between the drive and motor(s)
for the purpose of disconnecting or isolating certain motors/loads. If a
contactor 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) 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 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 is opened
.