Rockwell Automation 284G ArmorStart - User Manual - Manual (Page 52)

2-34 Installation and Wiring
In industrial establishments where the conditions of maintenance and
supervision ensure that only qualified persons service the installation,
and where the exposed cable is continuously supported and protected
against physical damage using mechanical protection, such as struts,
angles, or channels, Type TC tray cable that complies with the crush
and impact requirements of Type MC (Metal Clad) cable and is
identified for such use with the marking Type TC-ER (Exposed
Run)* shall be permitted between a cable tray and the utilization
equipment or device as open wiring. The cable shall be secured at
intervals not exceeding 1.8 m (6 ft) and installed in a “good workman-
like” manner. Equipment grounding for the utilization equipment
shall be provided by an equipment grounding conductor within the
cable.
*Historically cable meeting these crush and impact requirements
were designated and marked “Open Wiring”. Cable so marked is
equivalent to the present Type TC-ER and can be used.
While the ArmorStart is intended for installation in factory floor
environments of industrial establishments, the following must be
taken into consideration when locating the ArmorStart in the
application: Cables, including those for control voltage including
24V DC and communications, are not to be exposed to an operator or
building traffic on a continuous basis. Location of the ArmorStart to
minimize exposure to continual traffic is recommended. If location to
minimize traffic flow is unavoidable, other barriers to minimize
inadvertent exposure to the cabling should be considered. Routing
cables should be done in such a manner to minimize inadvertent
exposure and/or damage.
Additionally, if conduit or other raceways are not used, it is
recommended that strain relief fittings be utilized when installing the
cables for the control and power wiring through the conduit openings.
The working space around the ArmorStart may be minimized as the
ArmorStart does not require examination, adjustment, servicing or
maintenance while energized. In lieu of this service, the ArmorStart is
meant to be unplugged and replaced after proper lockout/tag-out
procedures have been employed.
DeviceNet Network Installation The ArmorStart Distributed Motor Controller contains the equivalent
of 30 in. (0.76 m) of DeviceNet drop cable's electrical characteristics
and therefore 30 in. of drop cable must be included in the DeviceNet
drop cable budget for each ArmorStart in addition to actual drop cable
required for the installation.
Other DeviceNet System Design Considerations
The separation of the control power and DeviceNet power is
recommended as a good design practice. This minimizes the load on
the DeviceNet supply, and prevents transients which may be present
on the control power system from influencing the communication
controls.