Rockwell Automation 1794-IRT8XT/B TC/MV/RTD Input Module Installation Instructions - Manuel

Publication 1794-IN050J-EN-P - January 2009
Installation Instructions
FLEX I/O Thermocouple/RTD Input Analog
Module
Cat. No. 1794-IRT8/B, 1794-IRT8K/B and
1794-IRT8XT/B
(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
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://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, and 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
publication 60664-1), at altitudes up to 2000 meters (6562 ft) 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
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, for
additional installation requirements, Allen-Bradley publication
1770-4.1.
• NEMA Standards publication 250 and IEC publication 60529, as
applicable, for explanations of the degrees of protection provided by
different types of enclosure.
WARNING
If you insert or remove the module while backplane power is on, an electrical arc
can occur. This could cause an explosion in hazardous location installations. Be
sure that power is removed or the area is nonhazardous before proceeding.
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.
WARNING
If you connect or disconnect wiring while the field side power is on, an
electrical arc can occur. This could cause an explosion in hazardous location
installations. Be sure that power is removed or the area is nonhazardous before
proceeding.
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:
• 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.
ATTENTION
Personnel responsible for the application of safety-related Programmable
Electronic Systems (PES) shall be aware of the safety requirements in the
application of the system and shall be trained in using the system.
ATTENTION
Do not remove or replace a Terminal Base unit while power is applied.
Interruption of the backplane can result in unintentional operation or machine
motion.
ATTENTION
To reduce susceptibility to noise, power analog modules and digital modules
from separate power supplies. Do not exceed a length of 3 m (9.8 ft) for DC
power cabling.
European Zone 2 Certification (The following applies when the product bears the Ex
or EEx 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.