AB Quality Allen-Bradley 2755-SN3 User manual

User
Manual
AdaptaScan
Bar Code
Readers
(Cat. No.
2755-SN3,-SN5, -SN8)
Allen-Bradley

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)
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 the Allen-Bradley Company 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, the Allen-Bradley Company cannot assume
responsibility or liability for actual use based on the examples and diagrams.
No patent liability is assumed by Allen-Bradley Company 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 the Allen-Bradley Company is prohibited.
Throughout this manual we use notes to make you aware of safety
considerations.
!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 the hazard
•recognize the consequences
Important: Identifies information that is especially important for successful
application and understanding of the product.
AdaptaScan is a trademark of Allen-Bradley Company, Inc.
Microsoft and MS-DOS are registered trademarks, and Windows is a trademark of Microsoft Corporation.
Important User Information

  
i
Preface
Chapter Objectives P–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Overview of this Manual P–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
IntendedAudience P–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Terminology P–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CE Directives P–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RelatedPublications P–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TechnicalSupport P–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 1
ChapterObjectives 1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Series B Changes 1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Typical System 1–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reader 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Scan Window 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Configuration Port Connector 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LED Indicators 1–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiring Base Connector 1–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
OperatingEnvironment 1–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Typical Applications 1–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Standalone 1–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Distributed (Master-Slave, DH-485) 1–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Distributed(Peer-to-Peer) 1–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ScanningModes 1–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LinearMode 1–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Raster Mode 1–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiring Base 1–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DeviceNet/Power Terminal Blocks 1–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RS-232 Terminal Block 1–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RS-422 / RS-485 Terminal Block 1–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ReaderConnector 1–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
I/O Module Sockets 1–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
I/O Module Terminal Blocks 1–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Package Detect Terminal Block 1–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power – Indicator LED 1–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Termination Switches 1–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CommunicationOptions 1–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DeviceNet Network 1–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RS-422 / RS-485 1–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RS-232 1–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Protocols 1–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using this Manual
Overview

Table of Contents
ii
AdaptaScan Software (Catalog No. 2755-ASN) 1–14. . . . . . . . . . . . . . . . . . . . . .
ScanningParameters 1–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Focus Options 1–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DecodingOperations 1–16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Monitoring 1–16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
OnlineAdjustments 1–16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety Labels 1–17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
OrderingInformation 1–18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 2
ChapterObjectives 2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
OrientationFactors 2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reader Scan Beam 2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Picket Fence or Step Ladder Orientation 2–2. . . . . . . . . . . . . . . . . . . . . . . . . . .
Skew, Pitch and Tilt 2–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Recommended Skew Angle 2–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Usable Beam Width 2–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Usable Beam Width (Catalog No. 2755-SN3) 2–4. . . . . . . . . . . . . . . . . . . . . .
Usable Beam Width (Catalog No. 2755-SN5) 2–5. . . . . . . . . . . . . . . . . . . . . .
Usable Beam Width (Catalog No. 2755-SN8) 2–5. . . . . . . . . . . . . . . . . . . . . .
Apparent Element Width 2–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ReaderAdjustments 2–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Read Ranges 2–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 3
ChapterObjectives 3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General Mounting Guidelines 3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dimensions and Clearances 3–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reader 3–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiring Base 3–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reader / Base Assembly 3–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mounting the Wiring Base 3–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Top Mounting 3–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
BottomMounting 3–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiring Base Dust Cover 3–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Conduit and Cable Connections 3–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cabling 3–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Conduit 3–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hole Plugs 3–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mounting Bracket 3–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing the Mounting Bracket 3–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Top Post Mounting 3–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Side Post Mounting 3–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing the Safety Wire 3–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation Considerations
Installing the Wiring Base
and Power Supply

Table of Contents
iii
Power Requirements 3–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Supplies 3–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Catalog No. 2755-PW46 Power Supply 3–13. . . . . . . . . . . . . . . . . . . . . . . . . .
Catalog No. 2755-PW47 Power Supply 3–13. . . . . . . . . . . . . . . . . . . . . . . . . .
Power Connections 3–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Single Reader Power Connection 3–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Multiple Reader Connections using 2755-PW46/-PW47 Supply 3–14. . . . . . . . .
Multiple Reader Connections using Other Power Supply 3–15. . . . . . . . . . . . . .
DeviceNet Connections 3–16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RS-485/RS-422Connections 3–17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Network or Point-to-Point 3–17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Line Termination 3–17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RS-232Connections 3–18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
I/O Modules and Wiring 3–19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Module Application 3–20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input Module Application 3–21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Package Detector 3–22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 4
ChapterObjectives 4–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 4–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power-upSequence 4–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking Reader Operation 4–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing a Reader 4–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 5
ChapterObjectives 5–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting a Personal Computer 5–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DownloadingFirmware 5–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Downloading a Configuration 5–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 6
ChapterObjectives 6–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Technical Support 6–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
EquipmentRequired 6–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using the TroubleshootingChart 6–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TroubleshootingChart 6–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LED Indicators 6–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning Scan Window 6–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing Scan Window 6–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing /Removing
the Reader
Downloading
Configurations
Troubleshooting
and Maintenance

Table of Contents
iv
Appendix A
Electrical A–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mechanical A–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Environment A–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Optical A–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Modules A–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input Modules A–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appendix B
Appendix C
Glossary
Index
Specifications
DIN Rail Mount
Terminal Blocks
European Union Directive
Compliance

Preface
Using this Manual
Read this chapter to familiarize yourself with the rest of the manual.
You will learn about:
•Contents of this manual
•Intended audience
•Terminology
•CE Directives
•Related publications
The following table describes the contents of each chapter in this
manual.
Chapter Title Purpose
Preface Provides an overview of the manual.
1 Overview Describes the main features and
operating capabilities of the AdaptaScan
Reader.
2Installation Considerations Describes the factors that determine the
optimum placement of the Reader.
3Installing the Wiring Base
and Power Supply Describes how to mount and wire the Reader wiring base.
4Installing / Removing
the Reader Describes installation and initial powerup
of the Reader. Instructions on how to
remove a Reader are also provided.
5Downloading Configurations Describes how to download firmware and
Reader configurations.
6Troubleshooting and
Maintenance
Provides assistance in identifying and
correcting common operating problems.
Procedures for routine maintenance
items are also provided.
Chapter Objectives
Overview of this Manual

Using this ManualP1–2
Because the AdaptaScan Software runs in the Microsoft Windows
environment, you should know how to use a mouse, choose
commands, and work with windows and dialogs.
You should also have a basic understanding of PLC and SLC
Controllers.
Equipment installers must be familiar with standard wiring
techniques and terminology.
This manual contains some terms that may be unfamiliar. Use the
glossary at the back of this manual for assistance.
The AdaptaScan Bar Code Readers (Catalog No. 2755-SN3, -SN5,
-SN8) are referred to as Readers.
If the AdaptaScan Reader is installed within the European Union,
Appendix C provides the legal requirements.
The following table lists other publications related to the AdaptaScan
Bar Code Reader.
Publication Number Description
2755-838 AdaptaScan Software User Manual
1485-6.7.1 DeviceNet Cable System Planning and Installation Manual
1770-6.2.2 Data Highway / Data Highway Plus / Data Highway-485 Cable
Installation Manual
1787-6.5.3 DeviceNet Manager Software (Catalog No. 1787-MGR) User Manual
1749-6.5.5 DeviceNet Adapter Module (Catalog No. 1749-ADN) User Manual
1747-6.5.2 DeviceNet Scanner (Catalog No. 1747-SDN) Configuration Manual
1771-6.5.118 DeviceNet Scanner (Catalog No. 1771-SDN) Configuration Manual
If you should require assistance or need additional information on
operating the AdaptaScan Reader, Configuration Software, or
accessories, contact your local Allen-Bradley Support office or
Allen-Bradley Technical Services at [phone].
Term
i
nolog
y
CE Directives
Related Publications
Inten
d
e
d
Au
di
ence
Techn
i
cal
S
upport

Chapter 1

This chapter briefly describes the AdaptaScan Bar Code Reader.
Section Page
Typical System 1–2
Reader 1–3
Typical Applications 1–5
Scanning Modes 1–8
Wiring Base 1–9
Communication Options 1–11
AdaptaScan Software 1–14
Safety Labels 1–17
Options and Accessories 1–18
If you are familiar with the Series A Reader and/or are replacing a
Series A Reader, note the following changes in the Series B versions.
•New programming port connector, programming cable and dust
cap.
•Soft-start power circuit reduces the current inrush when power is
supplied. This allows more Readers to be powered using a single
supply. The soft–start circuit also allows the use of current
limited power supplies.
Programming Cable
Catalog No. 2755-NC48
Dust Cap
New Programming Connector
Important: The Series A Reader uses the 2755-NC43 programming
cable. This cable is not compatible with the Series B Reader.
Chapter
O
bj
ect
i
ves
S
er
i
es
B
Changes

Overview1–2
A typical AdaptaScan installation consists of:
•Reader
•Wiring Base
•Package Detector
Configuration Cable
Personal
Computer
(For Configuration and Setup)
To Network
or Control Device
Package
Detector
Wiring Base
Reader
The Reader is configured using the AdaptaScan Software (Catalog
No. 2755-ASN) and configuration cable (Catalog No. 2755-NC48).
One software package and configuration cable is required per
installation.
Typical System

Overview 1–3
Scan Window
LED Indicators
Configuration
Port Connector
Wiring Base
Connector
Dust Cap
The Reader scans and decodes bar code symbols. The integral
decoder decodes the most common bar code symbologies. The scan
and decode functions are configured using software on a personal
computer. Three scan speeds are available:
Catalog Num er
can ate
Optical Scan Angle➀
Catalog
Num
b
er
S
can
R
ate
Minimum Maximum
2755-SN3 300 2272
2755-SN5 500 2050
2755-SN8 800 1830
➀Usable scan angle is 80% of the optical scan angle.
Scan Window
The replaceable scan window allows laser light to exit the Reader.
Light reflects off the bar code symbol, passes back through the scan
window and is decoded by the Reader. The scan window can be
replaced with a glass or plastic window. See page 1–18 for details
on replacement window kits.
Configuration Port Connector
The RS-232 port allows a personal computer running the
AdaptaScan Software (Catalog No. 2755-ASN) to download a
configuration to one or more Readers.
The Configuration Port Connector is for temporary use during
configuration transfers and system setup.
R
ea
d
er

Overview1–4
LED Indicators
Seven LEDs provide the following indications.
Indicator Condition Indicates:
Green Normal operating state
Flashing Green Initialization and/or incorrect (unconfigured)
configuration
Module Red Processor fault (nonrecoverable) Mo
d
ul
e
Flashing Red Minor fault (recoverable). Occurs when down-
loading firmware.
Off No power applied to Reader
Green Normal DeviceNet operating state
Flashing Green Communication link established, but not data
transfer.
Netw r
Red Communication fault
Network Flashing Red One or more DeviceNet devices are not re-
sponding. Reader may not be able to perform
all configured functions.
Off DeviceNet communications not established
La er
Yellow Scan beam on
La
s
er
On Off Scan beam off
Yellow Scanning and decoding bar code symbol
On Symbol Flashing Bar code symbol read at less than 100% rate On S
ym
bol Off Not scanning bar code symbol
Yellow Package detected
Trigger / Read Green Valid read
Tr
i
gger
/
Read
Off No trigger or no valid bar code symbol read
I/ 1
Yellow Input/Output module 1 active
I/
O
1
Off Input/Output module 1 not active
I/ 2
Yellow Input/Output module 2 active
I/
O
2
Off Input/Output module 2 not active
Wiring Base Connector
The 24-pin connector on the bottom of the Reader plugs into the
socket on the wiring base. No other connections to the Reader are
required.
Operating Environment
The Reader operates under a variety of conditions.
•Cast aluminum enclosure meets NEMA Type 4 requirements
when used with the wiring base.
•Operates in environments from 32 to 122F (0 to 50C).
•Mounts at any angle.
See Appendix A for a complete list of Reader specifications.

Overview 1–5
The flexibility of the Reader allows you to configure it for a variety
of applications. This section shows the basic system types.
Standalone
In a typical standalone setup, a single Reader scans bar codes on the
side of a package moving down a conveyor.
➀
➁
➂
➃➄
The package crosses the beam between the package detector ➀and
reflector ➁. The Reader ➂scans and decodes bar code symbols on
the package. You can configure the decoder with match table data.
When decoded data is matched, the Reader turns on an output
module (in wiring base ➃) to control the operation of a diverter ➄
that directs the package to a location.
Typical Applications

Overview1–6
Distributed (DeviceNet Master/Slave, DH-485)
The distributed application below shows three Readers scanning bar
codes at different points in an assembly process. Data from any
Reader is individually sent to a controller. The discrete I/O on each
Reader provide distributed control independent of the PLC
monitoring the process.
➂
➁Controller
➀
➃
Reader ➀identifies major sub-assemblies for routing to the proper
final assembly area. Reader ➁verifies the product code on the
assembled product being shipped. Reader ➂verifies that the
shipping label matches the product code. PLC ➃monitors the
process.

Overview 1–7
Distributed (DeviceNet Peer-to-Peer)
Peer-to-Peer communications allows a single Reader to gather data
from other Readers over a DeviceNet network. The Reader then
transfers the collected data to a host, such as a controller, over an
RS-232 link.
➀
➁
➂
➃
➄
Readers ➀through ➃ transfer data over a DeviceNet network to
Reader ➂ which collects the data and then transfers the data over an
RS-232 link to the host ➄.

Overview1–8
You can configure a Reader as either a linear or raster scanner. The
orientation of the bar code label with the scanner usually determines
the scanning mode appropriate for the application.
Linear Mode
Linear
Scan Line Elevation
is adjustable.
Scan Line Elevation
is adjustable.
In the linear scan mode, the scan line elevation can be be adjusted.
Raster Mode
Raster
Upper and lower raster
limits are adjustable.
Raster increment is adjust-
able. Increment increases /
decreases the number of scan
lines in the raster pattern.
Flyback quickly returns the
scan line to the upper raster
limit after the lower limit is
reached.
In raster scan mode, you can adjust or select:
•Upper and lower raster limits
Upper Raster Angle
Lower Raster Angle
•Raster increment
Increment
Decrease Increase
•Flyback enable
Flyback
Scanning Modes

Overview 1–9
The Reader plugs into a wiring base. All wiring base connections
are made using common electrician tools. Install the Reader after the
wiring base is installed to reduce the possibility of damage.
Wiring Base
Four conduit
entrances
Reader
Sockets for
2 I/O Modules
Terminal Blocks
for I/O Modules
Package Detect
Terminal Block
DeviceNet Communication
and Power Terminal Blocks
RS-232 Communication
Terminal Block
RS-422/RS-485
Communication
Terminal Block
Reader Connector Power Polarity – LED Indicator
Communication
Termination
Switches
DeviceNet/Power Terminal Blocks
The wiring base has 2 identical terminal blocks; one for incoming
power and communications, one for outgoing power and
communications.
RS-232 Terminal Block
Connections for point-to-point communications with a personal
computer or controller RS-232 port.
RS-422 / RS-485 Terminal Block
Connections for network or point-to-point communications with
another RS-422/RS-485 device or network.
Wiring Base

Overview1–10
Reader Connector
The Reader plugs into this connector. All power and
communications with the Reader occurs through this connector.
I/O Module Sockets
Two sockets support any combination of the following input and
output modules. See specifications in Appendix A.
Description Catalog Number
DC Output Module – rated at 3 to 60 VDC. 2755-OB5S
AC Output Module – rated at 12 to 140 VAC. 2755-OA5S
AC Output Module – rated at 24 to 280 VAC. 2755-OM5S
DC Input Module – accepts 3.3 to 32 VDC. 2755-IB5S
AC/DC Input Module – accepts 90 to 140 VRMS or VDC 2755-IA5S
AC/DC Input Module – accepts 180 to 280 VRMS or VDC 2755-IM5S
I/O Module Terminal Blocks
Wiring connections for the optional input or output modules.
Package Detect Terminal Block
Connects the contacts of a sensor, which detects the presence of a
package in the Reader’s scan area. The package detect can be either
an electronic (current sinking) or a hard contact type device. Most
applications use a photo-reflective type sensor. The package detect
starts and stops decoding and determines when messages are sent or
when outputs are energized.
Power – Indicator LED
Indicates normal operating and fault conditions.
Condition Indicates:
Green Power on.
Red Polarity of the power connections is reversed. Wiring must be
corrected.
Off No power.
Termination Switches
Terminates a DeviceNet and RS-422/RS-485 network. Terminate the
two devices furthest away from each other on a network by moving
the switch to the ON position.

Overview 1–11
This section defines the communication options for the Reader.
DeviceNet Network
AdaptaScan Readers support both DeviceNet Master/Slave and
Peer-to-Peer protocols.
On a DeviceNet Master/Slave network, Readers and other DeviceNet
slave devices communicate with a DeviceNet Scanner (Master). Up
to 63 slave devices are allowed on a master/slave network.
On a DeviceNet peer-to-peer network, up to 32 Readers can be
connected together. These Readers can:
•work in a coordinated mode to read multiple bar code symbols on
different sides of the same package.
•combine data from several Readers to a single Reader that
communicates the data to a host.
•pass input and output status information between Readers.
Reader Reader Other
PLC-5 with 1771-SDN (DeviceNet Scanner)
DeviceNetDevices
AdaptaScan Bar Code Readers operate on a DeviceNet network at
the following baud rates (Kbps = Kilobits per Second):
Baud Rate Supports Maximum Cable Length of:
125 Kbps 1640 feet (500 meters)
250 Kbps 656 feet (200 meters)
500 Kbps 328 feet (100 meters)
Communication Options

Overview1–12
RS-422 / RS-485
An RS-422 / RS-485 port allows point-to-point communications with
a single device. Through the RS-485 port, the AdaptaScan Reader
can also communicate with a DH-485 network. Both master and
slave modes are supported. As a master device, the Reader sends
data directly to an SLC 5/03 or 5/04 processor’s data table; no
polling is required by the SLC. As a slave device, the Reader
connects to the Flexible Interface Module (Catalog No. 2760-RB) for
multi-drop communications.
SLC 5/04
Link Coupler
DH485 DH485
Reader Reader
Note: You cannot use the RS-422/RS-485 port and the RS-232 port
at the same time.