Allen-Bradley FLEX 1794-IF2XOF2I Installation Instructions Manual

FLEX™ I/O Isolated Input/Output Analog
Module
Cat. No. 1794-IF2XOF2I

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
Automation sales office or online at http://www.rockwellautomation.com/literature/)
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.
Identifies information about practices or circumstances that can cause an
WARNING
explosion in a hazardous environment, which may lead to personal injury or
death, property damage, or economic loss.
Identifies information about practices or circumstances that can lead to
ATTENTION
personal injury or death, property damage, or economic loss. Attentions
help you:
 identify a hazard
 avoid a hazard
 recognize the consequence
Identifies information that is critical for successful application and understanding
IMPORTANT
of the product.
Labels may be located on or inside the equipment (for example, drive or
SHOCK HAZARD
motor) to alert people that dangerous voltage may be present.
Labels may be located on or inside the equipment (for example, drive or
BURN HAZARD
motor) to alert people that surfaces may be dangerous temperatures.
SGI-1.1 available from your local Rockwell
AB Parts
Installation Instructions
Environment and Enclosure
ATTENTION
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 m (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,
publication 1770-4.1, for additional installation requirements.
 NEMA Standard 250 and IEC 60529, as applicable, for explanations
of the degrees of protection provided by enclosures.
Preventing Electrostatic Discharge
ATTENTION
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.
If you insert or remove the module while backplane power is on, an
WARNING
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.
If you connect or disconnect wiring while the field side power is on, an
WARNING
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.
For Class I Division 2 applications, use only Class I Division 2 listed or
WARNING
recognized accessories and modules approved for used within the 1794
platform.
Personnel responsible for the application of safety-related programmable
ATTENTION
electronic systems (PES) shall be aware of the safety requirements in the
application of the system and shall be trained in using the system.
Publication 1794-IN039F-EN-P - November 2011