Rockwell Automation 281G ArmorStart - Safety Version - Getting Started - Manual (Page 10)

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Publication 280GS-QS001A-EN-P - May 2009
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.