Rockwell Automation 1771-IN User Manual

AC (24V) Input Module

Cat. No. 1771-IN

Installation Instructions

Contents

Important User Information

Use this document as a guide when installing the catalog number 1771-IN ac
input module.

To : See Page:

Important User Information 1

Preinstallation Considerations 3

Calculate Power Requirements 4

Key the Backplane Connector 4

Install the Field Wiring Arm 4

Connect Wiring to the Field Wiring Arm 5

Interpret the Status Indicators 7

Specifications 8

Rockwell Automation Support BackCover

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.ab.com/manuals/gi) 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.

1 Publication 1771-IN082A-EN-P - February 2005

2 AC (24V) Input Module

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

ATTENTION

Identifies information that is critical for successful
application and understanding of the product.

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

Publication 1771-IN082A-EN-P - February 2005

AC (24V) Input Module 3

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 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.

See NEMA Standards publication 250 and IEC
publication 60529, as applicable, for explanations of the
degrees of protection provided by different types of
enclosure. Also, see the appropriate sections in this
publication, as well as the Allen-Bradley publication
1770-4.1 ("Industrial Automation Wiring and Grounding
Guidelines"), for additional installation requirements
pertaining to this equipment.

Preinstallation Considerations

ATTENTION

This module contains filtering to limit the effects of voltage transients caused
by contact bounce and/or radiated electrical noise. The delay due to filtering is
nominally 18ms (

This module is designed to operate with ac proximity switches and other input
devices with an off-state leakage current less than 2.8mA peak.

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.

• If available, use a static-safe workstation.

+10ms) for turning ac inputs on or off.

Publication 1771-IN082A-EN-P - February 2005