Rockwell Automation 284E ArmorStart with EtherNet/IP - User Manual - Manual (Page 48)

48 Rockwell Automation Publication 280E-UM001B-EN-P - July 2012
Chapter 2 Installation and Wiring
General safety dictates that all metal parts are connected to earth with separate
copper wire or wires of the appropriate gauge. Most equipment has specific
provisions to connect a safety ground or PE (protective earth) directly to it.
Grounding PE or Ground
The safety ground - PE must be connected to earth ground. This point must
be connected to adjacent building steel (girder, joist), a floor ground rod, bus bar
or building ground grid. Grounding points must comply with national and local
industrial safety regulations or electrical codes. Some codes may require
redundant ground paths and periodic examination of connection integrity.
Grounding Motors
The motor frame or stator core must be connected directly to the PE connection
with a separate ground conductor. It is recommended that each motor frame be
grounded to building steel at the motor.
ArmorConnect Power Media Description
The ArmorConnect power media offers both three-phase and control power
cable cord set systems including patchcords, receptacles, tees, reducers and
accessories to be utilized with the ArmorStart Distributed Motor Controller.
These cable system components allow quick connection of ArmorStart
Distributed Motor Controllers, reducing installation time. They provide for
repeatable, reliable connection of the three-phase and control power to the
ArmorStart Distributed Motor Controller and motor by providing a plug-and-
play environment that also avoids system mis-wiring. When specifying power
media for use with the ArmorStart Distributed Motor Controllers (Bulletin
280E/281E and Bulletin 284E) use only the Bulletin 280E ArmorConnect
power media.
Refer to the On-Machine Selection Catalog for ordering details. The following
shows example configurations for power, control, and communication media.
IMPORTANT To avoid electrolytic corrosion on the external earth terminal, avoid spraying
moisture directly on the terminal. When used in washdown environments
apply a sealant or other corrosion inhibitor on the external ground terminal
to minimize any negative effects of galvanic or Electro-chemical corrosion.
Ground connections should be inspected on a regular basis.