Rockwell Automation 20D PowerFlex 700S Drive Ph I Control, Frames 1...11 - Manual (Page 29)

Installation/Wiring 1-15
Using Input/Output
Contactors
Using PowerFlex 700S
Drives with Regenerative
Power Units If a Regenerative unit (i.e., 1336 REGEN) is used as a bus supply or a brake,
the common mode capacitors should be disconnected (see
Table 1.F on
page 1-16 ).
!
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 occasionally, an auxiliary contact
on that device should also be wired to a digital input programmed
as a “Enable” function. The input device must not exceed one
operation per minute or drive damage will occur.
!
ATTENTION: The drive start/stop control circuitry includes
solidstate 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. When the AC line is removed,
there will be a loss of any inherent regenerative braking effect that
might be present - the motor will coast to a stop. 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.