Rockwell Automation 20M LPM15 Liquid-Cooled Adjustable Frequency AC Drive FRN 2.xxx - Manual (Page 36)

1-24 Installation/Wiring
Using Input/Output
Contactors Input Contactor Precautions
Output Contactor Precaution
I/O Wiring Important points to remember about I/O wiring:
• Use Copper wire only. Wire gauge requirements and recommendations
are based on 75 degrees C. Do not reduce wire gauge when using higher
temperature wire.
• Wire with an insulation rating of 600V or greater is recommended.
• Control and signal wires should be separated from power wires by at
least 0.3 meters (1 foot).
!
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 start/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.