Rockwell Automation Allen-Bradley 1794-IA8, Allen-Bradley 1794-IA8I, Allen-Bradley 1794-IA16 Installation Instructions Manual

Installation Instructions

FLEX I/O AC Digital Input Modules

Catalog numbers 1794-IA8, 1794-IA8I, 1794-IA16

Table of Contents

Topic Page

Important User Information 2

Environment and Enclosure 3

Preventing Electrostatic Discharge 3

North American Hazardous Location Approval 4

Installing Your AC Digital Input Module 6

Configuring Your AC Input Module 14

Specifications 16

2 FLEX I/O AC Digital Input Modules

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

http://www.rockwellautomation.com/literature/

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, when necessary, we use notes to make you aware of safety considerations.

available from your local Rockwell Automation Sales Office or online at

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, and recognize the consequences.

) describes some important differences between

SHOCK HAZARD: Labels may be on or inside the equipment (for example, drive or
motor) to alert people that dangerous voltage may be present.

BURN HAZARD: Labels may be on or inside the equipment (for example, drive or
motor) to alert people that surfaces may reach dangerous temperatures.

IMPORTANT Identifies information that is critical for successful application and understanding of

the product.

Publication 1794-IN102C-EN-P - July 2015

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 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, Rockwell
Automation publication 1770-4.1

• NEMA Standard 250 and IEC 60529, as applicable, for explanations of the
degrees of protection provided by different types of enclosure.

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.

FLEX I/O AC Digital Input Modules 3

, for additional installation requirements.

Publication 1794-IN102C-EN-P - July 2015

4 FLEX I/O AC Digital Input Modules

North American Hazardous Location Approval

The following modules are North American Hazardous Location approved: 1794-IA8,
1794-IA8I, 1794-IA16.

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 nam eplate indicating
the hazardous location temperature code. When comb ining
products within a system, the most adverse temp erature code
(lowest "T" number) may be used to help determ ine 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 r emoved
or the area is known to be nonhazardous.
Secure any external connection s 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 batt eries, 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 en vironnements de
Classe I Division 2 Groupes A, B, C, D dangereux et no n
dangereux. Chaque produit est livré avec des marquages
sur sa plaque d'identification qui indiquent le code de
température pour les environnements dangereu x. Lorsque
plusieurs produits sont combinés dans un système, le code
de température le plus défavora ble (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.

Publication 1794-IN102C-EN-P - July 2015

FLEX I/O AC Digital Input Modules 5

ATTENTION: FLEX™ I/O 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.

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.

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.

Publication 1794-IN102C-EN-P - July 2015

6 FLEX I/O AC Digital Input Modules

Installing Your AC Digital Input Module

3

7

1

2

6

4

Description Description

1 Keyswitch 5 Alignment bar

2 Terminal base 6 Groove

3 Flexbus connector 7 Latching mechanism

4 Module

The module mounts on a 1794 terminal base.

ATTENTION: During mounting of all devices, be sure that all debris (metal
chips, wire strands, etc.) is kept from falling into the module. Debris that falls
into the module could cause damage on power up.

1. Rotate the keyswitch (1) on the terminal base (2) clockwise to position 8 as
required for this type of module.

2. Make certain the flexbus connector (3) 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.

5

Publication 1794-IN102C-EN-P - July 2015