Rockwell Automation 1794-TB62DS, 1794-TB37DS, 1794-TB62EXD4X15, 1794-TB37EXD4CM8, 1794-TB37EXD4VM8 FLEX I/O D-Shell Terminal Base Units - Manual

Publication 1794-IN107A-EN-P - March 2005
Installation Instructions
FLEX I/O D-Shell Terminal Base Units and
Distribution Boards
1794-TB37DS and 1794-TB62DS
1794-TB37EXD4VM8, 1794-TB37EXD4CM8 and
1794-TB62EXD4X15
Important User Information
Solid state equipment has operational characteristics differing from those of
electromechanical equipment. Safety Guidelines for the Application, Installation
and Maintenance of Solid State Controls (Publication SGI-1.1 available from your
local Rockwell Automation sales office or online at
http://www.ab.com/manuals/gi) describes some important differences between
solid state equipment and hard-wired electromechanical devices. Because of this
difference, and also because of the wide variety of uses for solid state equipment,
all persons responsible for applying this equipment must satisfy themselves that
each intended application of this equipment is acceptable.
In no event will Rockwell Automation, Inc. be responsible or liable for indirect or
consequential damages resulting from the use or application of this equipment.
The examples and diagrams in this manual are included solely for illustrative
purposes. Because of the many variables and requirements associated with any
particular installation, Rockwell Automation, Inc. cannot assume responsibility or
liability for actual use based on the examples and diagrams.
No patent liability is assumed by Rockwell Automation, Inc. with respect to use of
information, circuits, equipment, or software described in this manual.
Reproduction of the contents of this manual, in whole or in part, without written
permission of Rockwell Automation, Inc. is prohibited.
Throughout this manual, when necessary, we use notes to make you aware of
safety considerations.
WARNING
Identifies information about practices or circumstances that can cause
an explosion in a hazardous environment, which may lead to personal
injury or death, property damage, or economic loss.
IMPORTANT
Identifies information that is critical for successful application and
understanding of the product.
ATTENTION
Identifies information about practices or circumstances that can lead
to personal injury or death, property damage, or economic loss.
Attentions help you:
• identify a hazard
• avoid a hazard
• recognize the consequence
SHOCK HAZARD
Labels may be located on or inside the equipment (e.g., drive or motor)
to alert people that dangerous voltage may be present.
BURN HAZARD
Labels may be located on or inside the equipment (e.g., drive or motor)
to alert people that surfaces may be dangerous temperatures.
ATTENTION
Environment and Enclosure
This equipment is intended for use in a Pollution Degree 2
industrial environment, in overvoltage Category II applications (as
defined in IEC publication 60664-1), at altitudes up to 2000
meters without derating.
This equipment is considered Group 1, Class A industrial
equipment according to IEC/CISPR Publication 11. Without
appropriate precautions, there may be potential difficulties
ensuring electromagnetic compatibility in other environments due
to conducted as well as radiated disturbance.
This equipment is supplied as "open type" equipment. It must be
mounted within an enclosure that is suitably designed for those
specific environmental conditions that will be present and
appropriately designed to prevent personal injury resulting from
accessibility to live parts. The interior of the enclosure must be
accessible only by the use of a tool. Subsequent sections of this
publication may contain additional information regarding specific
enclosure type ratings that are required to comply with certain
product safety certifications.
See NEMA Standards publication 250 and IEC publication
60529, as applicable, for explanations of the degrees of protection
provided by different types of enclosure. Also, see the appropriate
sections in this publication, as well as the Allen-Bradley
publication 1770-4.1 ("Industrial Automation Wiring and
Grounding Guidelines"), for additional installation requirements
pertaining to this equipment.
ATTENTION
FLEX I/O is grounded through the DIN rail to chassis ground. Use
zinc plated yellow-chromate steel DIN rail to assure proper grounding.
The use of other DIN rail materials (e.g. aluminum, plastic, etc.) that
can corrode, oxidize, or are poor conductors, can result in improper or
intermittent grounding.
ATTENTION
Preventing Electrostatic Discharge
This equipment is sensitive to electrostatic discharge, which can cause
internal damage and affect normal operation. Follow these guidelines
when you handle this equipment:
• Touch a grounded object to discharge potential static.
• Wear an approved grounding wriststrap.
• Do not touch connectors or pins on component boards.
• Do not touch circuit components inside the equipment.
• If available, use a static-safe workstation.