Rockwell Automation 1794-IB8_IB16_IB16K_IB32 Flex I/O Digital Input Modules Installation Instructions - Manual

Publication 1794-IN093C-EN-P - December 2009
Installation Instructions
FLEX I/O Digital Input Modules
Cat. Nos. 1794-IB8, -IB16, -IB16K, and -IB32
(Modules with a K in the last position of the catalog number are conformally coated
to meet noxious gas requirements of ISA/ANSI-71.040 1985 Class G3
Environment.)
European Hazardous Location Approval
The following input modules are European Zone 2 approved: 1794-IB8, -IB16, and
-IB16K.
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.literature.rockwellautomation.com )
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 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
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
60664-1), at altitudes up to 2000 m (6562 ft) without derating.
This equipment is considered Group 1, Class A industrial equipment
according to IEC/CISPR 11. Without appropriate precautions, there may be
difficulties with electromagnetic compatibility in residential and other
environments due to conducted and radiated disturbances.
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
enclosure must have suitable flame-retardant properties to prevent or
minimize the spread of flame, complying with a flame spread rating of
5VA, V2, V1, V0 (or equivalent) if non-metallic. 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.
In addition to this publication, see:
• Industrial Automation Wiring and Grounding Guidelines,
Allen-Bradley publication 1770-4.1 , for additional installation
requirements.
• NEMA Standards 250 and IEC 60529, as applicable, for explanations
of the degrees of protection provided by different types of enclosure.
ATTENTION
This product 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 (for example aluminum or plastic) that can
corrode, oxidize, or are poor conductors, can result in improper or
intermittent grounding. Secure DIN rail to mounting surface approximately
every 200 mm (7.8 in.) and use end-anchors appropriately.
ATTENTION
Prevent 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.
•
Use a static-safe workstation, if available.
• Store the equipment in appropriate static-safe packaging when not
in use.
European Zone 2 Certification (The following applies when the product bears the
Ex Marking)
This equipment is intended for use in potentially explosive atmospheres as defined by
European Union Directive 94/9/EC and has been found to comply with the Essential Health
and Safety Requirements relating to the design and construction of Category 3 equipment
intended for use in potentially explosive atmospheres, given in Annex II to this Directive.
Compliance with the Essential Health and Safety Requirements has been assured by
compliance with EN 60079-15 and EN 60079-0.
WARNING
Observe the following additional Zone 2 certification requirements.
• This equipment is not resistant to sunlight or other sources of UV
radiation.
• This equipment must be installed in an enclosure providing at least
IP54 protection when applied in Zone 2 environments.
• This equipment shall be used within its specified ratings defined
by Allen-Bradley.
• Provision shall be made to prevent the rated voltage from being
exceeded by transient disturbances of more than 40% when
applied in Zone 2 environments
•
This equipment must be used only with ATEX certified backplanes.
• Secure any external connections that mate to this equipment by
using screws, sliding latches, threaded connectors, or other means
provided with this product.
• Do not disconnect equipment unless power has been removed or
the area is known to be nonhazardous.