Rockwell Automation Publication 750-IN001P-EN-P - April 2017 25
Prepare for Installation Chapter 2
– The cable shield or conduit must terminate in a shielded connector
that is installed in a conduit plate or conduit box that is provided in
the “NEMA Type 1 Kit” for the drive. Kit catalog number 20-750-
NEMA1-Fx (where x is the frame size of the drive). See PowerFlex
750-Series NEMA/UL Type 1 Kits – Frames 1…7, publication 750-
IN008, for details.
Floor Mount Drive Frames 8 and larger: At the drive end of the motor
cable, terminate the shield at the PE grounding bar (see Floor Mount
Frames 8…10 Bus Bar Locations on page 164).
• At the motor end, the motor cable shield or conduit must terminate in a
shielded connector that must be properly installed in an earthed motor
wiring box that is attached to the motor. The motor wiring box cover
must be installed and earthed.
• All control (I/O) and signal wiring to the drive must use cable with a
braided shield that provides 75% or greater coverage, or the cables must
be housed in metal conduit, or equivalent shielding must be provided.
When shielded cable is used, the cable shield is terminated with a low-
impedance connection to earth at only one end of the cable, preferably
the end where the receiver is located. When the cable shield is
terminated at the drive end, it can be terminated by using a shielded
connector with a conduit plate or conduit box, or the shield can be
clamped to an ‘EMC plate’.
• Motor cables must be separated from control and signal wiring wherever
possible.
• Maximum motor-cable length must not exceed the maximum length
that is shown in Table 4 on page 26
for compliance with radio-
frequency emission limits for the specific standard and installation
environment.
• EMC cores must be applied to input power and motor cables for some
models of the PowerFlex 750-Series drives as indicated in Tab le 4 on
page 26.
• The drive must be powered from an earthed supply system such as a TN
or TT system and the PE-A and PE-B jumpers in the drive must be
installed (see Drive Power Jumper Configuration on page 215
).
• IP00 and NEMA/UL Open Type Frame 8 and higher frames must be
installed in suitable supplementary EMC enclosures to achieve
compliance with EN 61800-3.
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