Rockwell Automation 20D PowerFlex 700S Phase II Drive Frames 1...6 Installation Instructions - Manual (Page 43)

Rockwell Automation Publication 20D-IN024C-EN-P - July 2013 43
PowerFlex 700S Adjustable Frequency AC Drive - Phase II Control
Using Input/Output Contactors
It is recommended that the auxiliary relay of the output contactor (when used) be
wired in series with Digital Input 6 and that Digital Input 6 be configured as a
hardware enable input. See Hardware Enable Circuitry on page
54 for more
information.
Using PowerFlex 700S Drives with Regenerative Power Units
If a Regenerative unit (that is, 1336 REGEN) is used as a bus supply or a brake,
the common mode capacitors should be disconnected (see Power Jumpers on
page
27 for details).
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 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 solid state
components. If hazards due to accidental contact with moving machinery or
unintentional flow of liquid, gas or solids exist, an additional hard-wired stop
circuit may be required to remove the AC line to the drive. When the AC line is
removed, any inherent regenerative braking effect that might be present is lost
- the motor coasts 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 can 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 is removed from the respective motor, but the
drive continues 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, wire an auxiliary contact on the output
contactor to a drive digital input programmed as “Enable.” This causes the drive
to execute a coast-to-stop (cease output) whenever an output contactor is
opened.