Rockwell Automation 294D ArmorStart LT Distributed Motor Controller DeviceNet Version - User Manual - Manual (Page 56)

56 Rockwell Automation Publication 290D-UM001A-EN-P - June 2012
Chapter 2 Installation and Wiring
Service Space
The working space around the ArmorStart LT can be minimized as the
ArmorStart LT does not require examination, adjustment, servicing or
maintenance while energized. In lieu of this service, the ArmorStart LT
is meant to be unplugged and replaced after proper lock-out/tag-out
procedures have been employed.
Hand Operation (HOA) Considerations
The Hand/Off/Auto (HOA) is a factory-installed option that the user may
select. The HOA keypad may require the ArmorStart LT to be installed as
follows, if the application requires frequent use of the hand operated interface
by the equipment operator:
1. Install not less than 2 ft (0.6 m) above the servicing level and within easy
reach of the operator, who is in a normal working position.
2. Install where the operator is not placed in a hazardous situation when
operating the equipment.
3. Install where the possibility of inadvertent operation is minimized.
Where inadvertent operation may cause adverse effects the HOA can be disabled
via parameter 67.
General Wiring
Considerations Wire in an industrial control application can be divided into three groups: power,
control, and signal. The following recommendations for physical separation
between these groups is provided to reduce the coupling effect:
• Minimum spacing between different wire groups in the same tray should
be 6 in. (16 cm).
• Wire runs outside an enclosure should be run in conduit or have shielding/
armor with equivalent attenuation.
• Different wire groups should be run in separate conduits.
• Minimum spacing between conduits containing different wire groups
should be 3 in. (8 cm).
• Minimum spacing between 3-phase power cabling and DeviceNet
or I/O cabling should be at least 6 in. (16 cm) to avoid noise issues,
unless properly shielded.