Rockwell Automation 1794-IF2XOF2I User Manual

European Hazardous Location Approval

North American Hazardous Location Approval

Install the Analog Input/Output Module

Connect Wiring for the Analog Inputs and Outputs

0 (0)

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 SGI-1.1 available from your local Rockwell 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.

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.

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
		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.

Installation Instructions

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 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.

	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.
						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.

	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.

Publication 1794-IN039F-EN-P - November 2011

Rockwell Automation 1794-IF2XOF2I User Manual

2 FLEX™ I/O Isolated Input/Output Analog Module

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.

WARNING	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.
		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.

The 1794-IF2XOF2I module is hazardous location approved.

The following information applies		Informations sur l’utilisation de cet
when operating this equipment in		équipement en environnements dangereux :
hazardous locations:
Products marked “CL I, DIV 2, GP A, B, C, D”		Les produits marqués "CL I, DIV 2, GP A, B, C, D"
are suitable for use in Class I Division 2		ne conviennent qu’à une utilisation en
Groups A, B, C, D, Hazardous Locations and		environnements de Classe I Division 2 Groupes
nonhazardous locations only. Each product is		A, B, C, D dangereux et non dangereux. Chaque
supplied with markings on the rating		produit est livré avec des marquages sur sa
nameplate indicating the hazardous location		plaque d’identification qui indiquent le code de
temperature code. When combining		température pour les environnements
products within a system, the most adverse		dangereux. Lorsque plusieurs produits sont
temperature code (lowest “T” number) may		combinés dans un système, le code de
be used to help determine the overall		température le plus défavorable (code de
temperature code of the system.		température le plus faible) peut être utilisé pour
Combinations of equipment in your system		déterminer le code de température global du
are subject to investigation by the local		système. Les combinaisons d’équipements dans
Authority Having Jurisdiction at the time of		le système sont sujettes à inspection par les
installation.		autorités locales qualifiées au moment de
		l’installation.
	EXPLOSION HAZARD		RISQUE D’EXPLOSION
WARNING
WARNING		AVERTISSEMENT
	Do not disconnect equipment unless		Couper le courant ou s’assurer que
	power has been removed or the area		l’environnement est classé non dangereux
	is known to be nonhazardous.		avant de débrancher l'équipement.
	Do not disconnect connections to		Couper le courant ou s'assurer que
	this equipment unless power has been		l’environnement est classé non dangereux
	removed or the area is known to be		avant de débrancher les connecteurs.
	nonhazardous. Secure any external		Fixer tous les connecteurs externes reliés
	connections that mate to this		à cet équipement à l'aide de vis, loquets
	equipment by using screws, sliding		coulissants, connecteurs filetés ou autres
	latches, threaded connectors, or other		moyens fournis avec ce produit.
	means provided with this product.		La substitution de composants peut
	Substitution of components may		La substitution de composants peut
	Substitution of components may		rendre cet équipement inadapté à une
	impair suitability for Class I,		utilisation en environnement de Classe I,
	Division 2.		Division 2.
	If this product contains batteries,		S’assurer que l’environnement est
	they must only be changed in an area		classé non dangereux avant de changer
	known to be nonhazardous.		les piles.

7	6
	6
	45284

	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.

	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			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.

If multiple power sources are used, do not exceed the specified isolation

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 Wiring Connections for 1794-IF2XOF2I Input/Output Module table. Use Belden 8761 cable for signal wiring.

Publication 1794-IN039F-EN-P - November 2011

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