Rockwell Automation 1336Z SPIDER - FRN 2.xxx-5.xxx - Manual (Page 15)

General Installation for All Drives 2–5
Input Devices Starting and Stopping the Motor
Repeated Application/Removal of Input Power
Electrical Interference - EMI/RFI Immunity
The immunity of 1336 SPIDER drives to externally generated
interference is good. Usually, no special precautions are required
beyond the installation practices provided in this publication.
Since coils can generate severe electrical transients, it is
recommended that the coils of DC energized contactors associated
with drives be suppressed with a diode or similar device. AC supplied
coils should utilize an R-C suppressor.
Emission
Careful attention must be given to the arrangement of power and
ground connections to the drive to avoid interference with nearby
sensitive equipment. The cable to the motor carries switched voltages
and should be routed well away from sensitive equipment.
The ground conductor of the motor cable must be connected to the
drive ground (PE) terminal directly. Connecting this ground
conductor to a cabinet ground point or ground bus bar may cause high
frequency current to circulate in the ground system of the enclosure.
The motor end of this ground conductor must be solidly connected to
the motor case ground.
Shielded cable must be used to guard against radiated emissions from
the motor cable. The shield must be connected to the drive ground
(PE) terminal and the motor ground as outlined above. Armored cable
can be used if radiation is not a concern.
!
ATTENTION: The drive start/stop control circuitry in-
cludes 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 cir-
cuit may be required to remove AC line power to the drive.
When AC power is removed, there will be a loss of inherent
regenerative braking effect & the motor will coast to a stop.
An auxiliary braking method may be required.
!
ATTENTION: The drive 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 is not recommended.