Rockwell Automation 1771-OA User Manual

Installation Instructions

AC Output Module

(Catalog Number 1771-OA)

To The Installer

Important User
Information

This document provides information on:

To See page

Important User Information 1

Pre-installation Considerations 4

Calculate Power Requirements 4

Determine Module Placement 4

Prevent Electrostatic Discharge 4

Key the Backplane Connector 5

Install the Module and Field Wiring Arm 6

Connect Wiring to the Field Wiring Arm 7

For this reference information See page

Interpreting the Status Indicators 10

Replacing a Fuse 10

Hazardous Location Approval 11

Specifications 11

Because of the variety of uses for the products described in this
publication, those responsible for the application and use of these
products must satisfy themselves that all necessary steps have been
taken to assure that each application and use meets all performance
and safety requirements, including any applicable laws, regulations,
codes and standards. In no event will Rockwell Automation be
responsible or liable for indirect or consequential damage resulting
from the use or application of these products.

Any illustrations, charts, sample programs, and layout examples
shown in this publication are intended solely for purposes of
example. Since there are many variables and requirements associated
with any particular installation, Rockwell Automation does not
assume responsibility or liability (to include intellectual property
liability) for actual use based upon the examples shown in this
publication.

Publication 1771-IN080A-EN-P - November 2002

AC Output Module2

Allen–Bradley publication SGI–1.1, Safety Guidelines for
Application, Installation, and Maintenance of Solid–State Control
(available from your local Rockwell Automation office), describes
some important differences between solid–state equipment and
electromechanical devices that should be taken into consideration
when applying products such as those described in this publication.

Reproduction of the contents of this copyrighted publication, in
whole or part, without written permission of Rockwell Automation,
is prohibited.

Throughout this publication, notes may be used to make you aware
of safety considerations. The following annotations and their
accompanying statements help you to identify a potential hazard,
avoid a potential hazard, and recognize the consequences of a
potential hazard.

WARNING

!

ATTENTION

!

IMPORTANT

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 may lead to personal injury or
death, property damage, or economic loss.

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

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AC Output 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 enclosures. 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.

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AC Output Module4

Pre-installation
Considerations

Calculate Power
Requirements

Determine Module
Placement

This module contains the circuitry necessary to control the on/off
status of eight user devices. The devices can be:

• ac motor starters

• indicators

• solenoids

An output can drive an Allen–Bradley Size 4 motor starter, provided
its supply voltage does not drop below 92V ac. The maximum load
current the module can deliver is 1.5A per channel, not to exceed 6A
total per module.

The output module is powered by the power supply connected to the
I/O chassis backplane. The module requires a maximum current of
210mA from the +5V dc output of this supply. Total the current
requirements of this module with the other modules in the I/O
chassis to avoid overloading the supply or the I/O chassis backplane.

Group your modules to minimize adverse effects from radiated
electrical noise and/or heat. We recommend the following:

• Group analog input and low voltage dc modules away from ac

modules or high voltage dc modules to minimize electrical noise
interference.

• Place analog input modules and other I/O modules sensitive to

heat away from slot power supplies and rack controllers to
minimize adverse heat effects.

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.

• If available, use a static–safe workstation.

• When not in use, keep modules in appropriate

static–safe packaging.

Publication 1771-IN080A-EN-P - November 2002