Rockwell Automation 1336F PLUS II User Manual - Firmware 1.xxx-6.xxx User Manual
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2–18
Installation/Wiring
• No more than three sets of motor leads can be routed through a sin-
gle conduit. This will minimize “cross talk” that could reduce the
effectiveness of the noise reduction methods described. If more
than three drive/motor connections per conduit are required,
shielded cable as described above must be used. If practical, each
conduit should contain only one set of motor leads.
Motor Lead Lengths
Installations with long cables to the motor may require the addition of
output reactors or cable terminators to limit voltage reflections at the
motor. Excessive cable charging current can also reduce the amount
of current available to produce rated motor torque. Refer to Tables
and
for the maximum cable length allowed for various installa-
tion techniques. Shaded distances are restricted by cable capacitance
charging current. The figure below demonstrates how total cable
length is calculated. Failure to follow these guidelines can result in
poor motor performance and nuisance drive overcurrent or overload
tripping. For installations that exceed the recommended maximum
lengths listed, contact the factory.
Please note that the cable lengths shown are guidelines. Your applica-
tion may be restricted to a shorter cable length due to wire type, wire
placement, line reactor and type of motor.
How to Measure Motor Cable Lengths Limited by Capacitance
!
ATTENTION: To avoid a possible shock hazard caused by
induced voltages, unused wires in the conduit must be
grounded at both ends. For the same reason, if a drive shar-
ing a conduit is being serviced or installed, all drives using
this conduit should be disabled. This will eliminate the pos-
sible shock hazard from “cross coupled” drive motor leads.
JOG
ESC
SEL
JOG
ESC
SEL
182.9 (600)
15.2 (50)
JOG
ESC
SEL
15.2 (50)
15.2 (50)
JOG
ESC
SEL
91.4 (300)
91.4 (300)
167.6 (550)
All examples represent motor cable length of 189.2 meters (600 feet).
152.4 (500)