Rockwell Automation 1794-IF2XOF2I User Manual
Installation Instructions
WARNING
ATTENTION
IMPORTANT
SHOCK HAZARD
BURN HAZARD
ATTENTION
ATTENTION
WARNING
WARNING
WARNING
ATTENTION
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
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
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
of the product.
Labels may be located on or inside the equipment (for example, drive or
motor) to alert people that dangerous voltage may be present.
SGI-1.1 available from your local Rockwell
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 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
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
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.
Labels may be located on or inside the equipment (for example, drive or
motor) to alert people that surfaces may be dangerous temperatures.
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.
For Class I Division 2 applications, use only Class I Division 2 listed or
recognized accessories and modules approved for used within the 1794
platform.
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.
Publication 1794-IN039F-EN-P - November 2011
2 FLEX™ I/O Isolated Input/Output Analog Module
ATTENTION
WARNING
WARNING
AVERTISSEMENT
ATTENTION
ATTENTION
ATTENTION
45284
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5
4
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2
1
7
If multiple power sources are used, do not exceed the specified isolation
voltage.
European Hazardous Location Approval
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 Zone 2 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.
Observe the following additional 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
Rockwell Automation.
This equipment must be used only with ATEX certified Rockwell
Automation terminal bases.
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.
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.
North American Hazardous Location Approval
The 1794-IF2XOF2I module is hazardous location approved.
The following information applies
when operating this equipment in
hazardous locations:
Products marked “CL I, DIV 2, GP A, B, C, D”
are suitable for use in Class I Division 2
Groups A, B, C, D, Hazardous Locations and
nonhazardous locations only. Each product is
supplied with markings on the rating
nameplate indicating the hazardous location
temperature code. When combining
products within a system, the most adverse
temperature code (lowest “T” number) may
be used to help determine the overall
temperature code of the system.
Combinations of equipment in your system
are subject to investigation by the local
Authority Having Jurisdiction at the time of
installation.
EXPLOSION HAZARD
Do not disconnect equipment unless
power has been removed or the area
is known to be nonhazardous.
Do not disconnect connections to
this equipment unless power has been
removed or the area is known to be
nonhazardous. Secure any external
connections that mate to this
equipment by using screws, sliding
latches, threaded connectors, or other
means provided with this product.
Substitution of components may
impair suitability for Class I,
Division 2.
If this product contains batteries,
they must only be changed in an area
known to be nonhazardous.
Informations sur l’utilisation de cet
équipement en environnements dangereux :
Les produits marqués "CL I, DIV 2, GP A, B, C, D"
ne conviennent qu’à une utilisation en
environnements de Classe I Division 2 Groupes
A, B, C, D dangereux et non dangereux. Chaque
produit est livré avec des marquages sur sa
plaque d’identification qui indiquent le code de
température pour les environnements
dangereux. Lorsque plusieurs produits sont
combinés dans un système, le code de
température le plus défavorable (code de
température le plus faible) peut être utilisé pour
déterminer le code de température global du
système. Les combinaisons d’équipements dans
le système sont sujettes à inspection par les
autorités locales qualifiées au moment de
l’installation.
RISQUE D’EXPLOSION
Couper le courant ou s ’assurer que
l’environnement est classé non dangereux
avant de débrancher l'équipement.
Couper le courant ou s 'assurer que
l’environnement est classé non dangereux
avant de débrancher les connecteurs.
Fixer tous les connecteurs externes reliés
à cet équipement à l'aide de vis, loquets
coulissants, connecteurs filetés ou autres
moyens fournis avec ce produit.
La substitution de composants peut
rendre cet équipement inadapté à une
utilisation en environnement de Classe I,
Division 2.
S’assurer que l’environnement est
classé non dangereux avant de changer
les piles.
Install the Analog Input/Output Module
Description Description
1 FlexBus connectors 5 Groove
2 Latching mechanism 6 Alignment bar
3 Keyswitch 7 Module
4 Terminal base
The module mounts on a 1794 terminal base.
1. Rotate the keyswitch (3) on the terminal base (4) clockwise to position 5 as
required for this type of module.
2. Make sure the FlexBus connector (1) is pushed all the way to the left to
connect with the neighboring terminal base/adapter. You cannot install
the module unless the connector is fully extended.
3. Make sure the pins on the bottom of the module are straight so they will
align properly with the connector in the terminal base.
4. Position the module (7) with its alignment bar (6) aligned with the groove
(5) on the terminal base.
5. Press firmly and evenly to seat the module in the terminal base unit. The
module is seated when the latching mechanism (2) is locked into the
module.
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.
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.
Connect Wiring for the Analog Inputs and Outputs
1. 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TB3T, and 1794-TB3TS:
Connect individual input/output wiring to numbered terminals on the
0…15 row (A) as indicated in the Wiring Connections for 1794-IF2XOF2I
Input/Output Module table. Use Belden 8761 cable for signal wiring.
1794-TBN: Connect individual input/output wiring to even-numbered
terminals on the 16…33 row (B) as indicated in the
for 1794-IF2XOF2I Input/Output Module table. Use Belden 8761 cable
for signal wiring.
Connect only one current or one voltage signal per channel. Do not
connect both current and voltage on one channel.
Wiring Connections
Publication 1794-IN039F-EN-P - November 2011
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