Rockwell Automation 1771-OQB User Manual

Installation Instructions

Isolated 24V dc Output Module

(Cat. No. 1771-OQ Series B)

Contents

Important User Information

Use this document as a guide when installing the catalog number 1771-OQ
Series B isolated dc output module.

To See page

Important User Information 1

Preinstallation Considerations 3

Set the Jumper Configuration 3

Calculate Power Requirements 4

Key the Backplane Connector 5

Install the Field Wiring Arm 5

Connect Wiring to the Field Wiring Arm 6

Interpreting the Status Indicators 8

Replacing the Fuses 8

Specifications 9

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.

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.

1 Publication 1771-IN081B-EN-P - June 2004

2 Isolated 24V dc Output Module

Throughout this manual we use notes to make you aware of safety considerations.

WARNING

IMPORTANT

ATTENTION

ATTENTION

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 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

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.

Publication 1771-IN081B-EN-P - June 2004

Isolated 24V dc Output Module 3

Preinstallation Considerations

Set the Jumper Configuration

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, store the equipment in appropriate static-safe

packaging.

This module contains soldered jumpers which must be removed when using
certain output devices, such as solenoids. These jumpers limit the effects of
noise. These jumpers are not reusable. Make certain that you will not be using
a particular output for other uses before clipping the jumper.

Your module contains a jumper for each output. Under normal conditions,
these jumpers are left in the position as shipped. When using solenoids as an
output device, remove the jumper on the circuit board. Removing the jumper
changes the off-state clamping voltage from -0.7V dc to -15.7V dc. This
decreases the turnoff time of the solenoid, allowing it to energize faster.
Follow the procedure listed below for removing a jumper. Refer to Figure 1.

1. Remove the plastic cover on the left front side of the module by
removing two screws.

2. Locate the jumper which corresponds to your output. Note: The
jumpers are usually brown with a black band.

3. Clip both ends of the jumper with diagonal cutters.

ATTENTION

Do not use a soldering tool to remove the jumper. This
could cause damage to the adjacent components or the
entire circuit board.

4. Replace the cover and secure with two screws

Publication 1771-IN081B-EN-P - June 2004

4 Isolated 24V dc Output Module

Figure 1
Configuration Jumper Locations

Black Band

Clip leads here.

Jumper 1 - corresponds to output 0

Jumper 2 - corresponds to output 1

Jumper 3 - corresponds to output 2

Jumper 4 - corresponds to output 3

Calculate Power Requirements

Jumper 5 - corresponds to output 4

Jumper 6 - corresponds to output 5

Jumper 7 - corresponds to output 6

Jumper 8 - corresponds to output 7

1065-I

1

The module receives its power through the 1771 I/O chassis backplane from
the chassis power supply. The module requires 225mA from the output of this
supply .

Add this current to the requirements of all other modules in the I/O chassis to
prevent overloading the chassis backplane and/or backplane power supply.

ATTENTION

Do not insert or remove modules from the I/O chassis
while system power is applied. Failure to observe this rule
could result in:

Publication 1771-IN081B-EN-P - June 2004

• module damage or degradation of performance

• injury or equipment damage due to possible

unexpected operation.