Rockwell Automation 1336 3-20HP FRN 1.01-3.01 - Manual (Page 52)

Wiring
Chapter 6
6-5
!
ATTENTION:
1. Any disconnecting means wired to drive output terminals M1,
M2 and M3 must be capable of stopping the drive if opened
during drive operation. If opened during drive operation, the
drive will continue to produce output voltage into an open motor
circuit causing a potential shock hazard.
2. The start/stop control circuitry in the 1336 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 is required to remove AC line
power to the drive. When AC input power is removed, there will
be a loss of inherent regenerative braking effect and the motor
will coast to a stop. An auxiliary braking method may be
required.
The 1336 is intended to be controlled by control input signals
that will start and stop the motor. A device that routinely
disconnects then reapplies line power to the drive for the purpose
of starting and stopping the motor must not be used. After a
hard wired stop has been initiated, allow at least one minute
before reapplying input power to the drive. The allowable
number of hard wired start/stops are 3 cycles within a 5 minute
period. Wait 10 minutes before attempting the next 3 hard wired
stop cycle to allow the drive precharge resistors to cool.
Refer to codes and standards applicable to your particular system
for specific requirements and additional information.