Rockwell Automation Publication 6000-IN100B-EN-P - October 2020
37
Chapter 2 Drive Electrical Installation
If the control cable must pass through the power cable tray, the angle between
the cable trays must be as close to 90° as possible.
Do not mix AC and DC wires in the same cable bundle.
General Wire Categories on page 61
identifies general wire categories for
installing the PowerFlex 6000T drive. Each category has an associated wire
group number that is used to identify the required wire. Application and signal
examples, along with the recommended type of cable for each group, are
provided. A matrix providing the recommended minimum spacing between
different wire groups that run in the same tray or in a separate conduit is also
provided.
Control Signal Wire Shield Grounding
Guidelines for Drive Signal and Safety Grounds: when using interface cables
carrying signals, where the frequency does not exceed 1 MHz, for
communications with the drive, follow these general guidelines:
•
Ground screen mesh around the entire circumference, rather than
forming a pigtail grounded only at one point.
•
For coaxial cables with a single conductor surrounded by a mesh screen,
ground the screen at both ends.
•
When using a multi-layer screened cable (that is, a cable with both a
mesh screen and a metal sheath or some form of foil), there are two
alternative methods:
- Ground the mesh screen at both ends to the metal sheath. The metal
sheath or foil (known as the drain) should, unless otherwise specified,
be grounded at one end only, again, as specified above, at the receiver
end or the end that is physically closest to the main equipment ground
bus
- Leave the metal sheath or foil insulated from ground, and ground the
other conductors and the mesh cable screen at one end only, as stated
above.
Grounding provisions for control signal wiring is shown in
Figure 15 - Vertical Ground Bus in LV Cabinet
Provisions for Grounding
Control Signal Wiring Shields,
and so on.
Ground Bus
B-Frame
A-Frame
Provisions for Grounding
Control Signal Wiring Shields,
and so on.
Ground Bus
