Allen-Bradley A-B QUALITY DL20 Series User manual

ALLEN-BRADLEY
User
Manual
Dataliner
Message
Display
DL20 Series
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.
PLC and Dataliner are registered trademarks of Allen-Bradley Company, Inc.
Important User Information

A–B
Dataliner Message Display
DL20 Series
Table of Contents
i
Chapter 1
Chapter Objectives 1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Manual Overview 1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Intended Audience 1–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Conventions Used 1–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Related Publications 1–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 2
Chapter Objectives 2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Overview of DL20 2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Message Editing Software 2–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Optional Offline Programming Software 2–2. . . . . . . . . . . . . . . . . . .
Storing Messages 2–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Host and Slave Devices 2–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Addressable Master 2–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Slave Mode Master 2–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Programmable Controller Interface 2–3. . . . . . . . . . . . . . . . . . . . . . . .
Auxiliary Devices 2–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Self Testing and Diagnostics 2–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power On Testing 2–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Autorun 2–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CPU ACTIVE Light 2–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Message Options 2–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Communications Options 2–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accessories 2–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 3
Chapter Objectives 3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Desktop Hookup 3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Initial Startup 3–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Types of Prompts 3–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Yes/No Prompts 3–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Numeric Prompts 3–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Main Menu 3–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Returning to Main Menu 3–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using This Manual
Introduction to the DL20
Getting Started

Dataliner Message Display
DL20 Series
Table of Contents
ii
Chapter 4
Chapter Objectives 4–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Entering the Editor 4–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifying Message Attributes 4–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Line Selection 4–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Line-Scroll Mode 4–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Printing Messages 4–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Slave Messages 4–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Message Wait Time 4–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Auto Clear 4–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Auto Repeat 4–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chaining Messages 4–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Flashing Messages 4–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Relay Operation 4–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Historical Event Recording 4–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Invisible Messages 4–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Attribute Defaults 4–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Editing Messages 4–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Edit Commands 4–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Moving the Cursor 4–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Move Cursor Forward One Space (Ctrl L) 4–12. . . . . . . . . . . . . . . . . .
Move Cursor Backward One Space (Ctrl H) 4–12. . . . . . . . . . . . . . . . .
Move Cursor Up One Line (Ctrl K) 4–12. . . . . . . . . . . . . . . . . . . . . . .
Move Cursor Down One Line (Ctrl J) 4–12. . . . . . . . . . . . . . . . . . . . . .
Deleting a Character (Ctrl D) 4–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Erasing a Message (Ctrl E) 4–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setting New Message Attributes (Ctrl A) 4–14. . . . . . . . . . . . . . . . . . . . .
Previewing a Message (Ctrl R) 4–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Imbedding Variable Data (Ctrl V) 4–15. . . . . . . . . . . . . . . . . . . . . . . . . . .
Imbedding Formatted Variable with Decimal Point (Ctrl X) 4–15. . . . . .
Changing Variable Format (Ctrl C) 4–16. . . . . . . . . . . . . . . . . . . . . . . . . .
Imbedding Time and Date (Ctrl T) 4–17. . . . . . . . . . . . . . . . . . . . . . . . . .
Showing Available Memory (Ctrl F) 4–17. . . . . . . . . . . . . . . . . . . . . . . . .
Uppercase Lock-Unlock (Ctrl U) 4–18. . . . . . . . . . . . . . . . . . . . . . . . . . .
Show Commands (Ctrl S) 4–18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exiting the Editor (Ctrl Q) 4–19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Entering an Example Message 4–19. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Estimating Memory Usage 4–22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Creating and Editing
Messages

Dataliner Message Displays
DL20 Series
Table of Contents
iii
Chapter 5
Chapter Objectives 5–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Entering the Run Mode 5–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Autorun Feature 5–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Autorun Message 5–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Background Message 5–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exiting the Run Mode 5–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Triggers and Queues 5–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Loading and Unloading Queues 5–3. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Loading Data Queue 5–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Loading Message Trigger Queue 5–3. . . . . . . . . . . . . . . . . . . . . . . . . .
Unloading Queues 5–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Queue Capacity 5–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Queuing Examples 5–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transferring Data to be Queued 5–5. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Special Messages 5–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Special Message #1: Clear Display 5–6. . . . . . . . . . . . . . . . . . . . . . . .
Special Message #2: Clear Display and Queues 5–6. . . . . . . . . . . . . .
Special Message #3: Reset DL20 5–7. . . . . . . . . . . . . . . . . . . . . . . . .
Special Message #4: Test Battery 5–7. . . . . . . . . . . . . . . . . . . . . . . . .
Special Message #5: Print HE Stack 5–7. . . . . . . . . . . . . . . . . . . . . . .
Special Message #6: Stop Printing HE Stack 5–8. . . . . . . . . . . . . . . .
Special Message #7: Clear HE Stack 5–8. . . . . . . . . . . . . . . . . . . . . . .
Special Message #8: Resume Run Mode 5–8. . . . . . . . . . . . . . . . . . . .
Special Message #9: Clear Queues, Halt Run Mode 5–9. . . . . . . . . . .
Special Message #10: Clear Queues 5–9. . . . . . . . . . . . . . . . . . . . . . .
Special Message #11: Test Display 5–9. . . . . . . . . . . . . . . . . . . . . . . .
Setting Clock Using Special Messages 5–10. . . . . . . . . . . . . . . . . . . . .
Special Message #12: Interactive Clock Setting 5–10. . . . . . . . . . . . . .
Special Message #13: Set Clock Using Variable Data 5–11. . . . . . . . .
Special Message #15: Enable HE Stack 5–12. . . . . . . . . . . . . . . . . . . .
Special Message #16: Disable HE Stack 5–12. . . . . . . . . . . . . . . . . . . .
Dynamic Chaining 5–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dynamic Chaining Example #1 5–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dynamic Chaining Example #2 5–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Illegal Message Trigger Indication 5–16. . . . . . . . . . . . . . . . . . . . . . . . . .
Variable Stack Empty Indication 5–16. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Printer Handshaking 5–16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Historical Event Recording 5–17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Run Mode

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Table of Contents
iv
Chapter 6
Chapter Objectives 6–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Serial Port Connectors 6–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Serial Data Format 6–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using the Serial Port 6–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Selecting Serial Port Parameters 6–2. . . . . . . . . . . . . . . . . . . . . . . . . .
Serial Data Format 6–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Serial Data Example 6–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Addressable Master 6–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Slave Mode 6–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Entering Slave Mode 6–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exiting Slave Mode 6–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Slave Mode Protocol 6–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Slave Mode Control Codes 6–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Slave Mode Baud Rate 6–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Slave Mode Individual Relay Control 6–7. . . . . . . . . . . . . . . . . . . . . .
Chapter 7
Chapter Objectives 7–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parallel Port Description 7–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using the Parallel Port 7–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Logic Levels 7–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Binary vs. BCD 7–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Data Line Values (Binary) 7–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Data Line Values (BCD) 7–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parallel Port Strobe Lines 7–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Edge Triggered Strobe 7–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unchanged Data Rejection 7–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input Converters 7–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parallel Port Sampling Methods 7–8. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Event Driven Sampling 7–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Time Driven Sampling 7–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Time Driven Sampling Methods 7–10. . . . . . . . . . . . . . . . . . . . . . . . . .
AC Sampling 7–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DC Sampling 7–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transferring Variable Data 7–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Example Message Trigger with Variable Data 7–13. . . . . . . . . . . . . . . . .
Reducing Host Output Requirements 7–14. . . . . . . . . . . . . . . . . . . . . . . .
The Serial Port
The Parallel Port

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v
Chapter 8
Chapter Objectives 8–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Special Functions Menu 8–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Print Messages 8–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tape Operations 8–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using Data Recorders 8–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using Allen-Bradley Data Recorders 8–7. . . . . . . . . . . . . . . . . . . . . .
Using STR-Link II and III Data Recorders 8–7. . . . . . . . . . . . . . . . . .
EPROM Programming 8–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DL20 Operation Using an EPROM 8–8. . . . . . . . . . . . . . . . . . . . . . . .
Real Time Clock Functions 8–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reset Unit Function 8–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setting Up I/O Port Functions 8–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setting Serial Port 8–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setting Parallel Port 8–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Debug Mode 8–18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Clear RAM 8–18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Set Up Master 8–19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Selecting an Autorun Message 8–20. . . . . . . . . . . . . . . . . . . . . . . . . . .
Selecting a Background Message 8–20. . . . . . . . . . . . . . . . . . . . . . . . .
Selecting a Master Address 8–21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Enable Dynamic Chaining 8–22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Turn Relay On When Batteries are Low 8–22. . . . . . . . . . . . . . . . . . . .
Displaying Prompts on All Slaves 8–23. . . . . . . . . . . . . . . . . . . . . . . . .
Flagging Errors 8–23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 9
Chapter Objectives 9–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation Dimensions 9–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DL20 Installation 9–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mounting Procedure 9–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiring Procedures 9–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DL20 Wiring Terminals 9–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting RS-232 Devices 9–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting IBM XT or Compatible 9–5. . . . . . . . . . . . . . . . . . . . . . .
Connecting IBM AT or Compatible 9–5. . . . . . . . . . . . . . . . . . . . . . .
Connecting 1775-GA Peripheral Communications Module 9–6. . . . .
Connecting 1771-DB BASIC Module 9–6. . . . . . . . . . . . . . . . . . . . . .
Connecting a Data Recorder 9–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting a Programming Terminal 9–7. . . . . . . . . . . . . . . . . . . . . .
Connecting RS-422 Devices 9–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting DL10 Slaves 9–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting Addressable DL20 Masters 9–10. . . . . . . . . . . . . . . . . . . .
Connecting 1771-DB BASIC Module to a Single DL20 9–11. . . . . . .
Connecting 1771-DB BASIC Module to Multiple DL20s 9–11. . . . . .
Replacing Fuses 9–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Special Functions
Installation and
Maintenance

Dataliner Message Display
DL20 Series
Table of Contents
vi
Chapter 10
Display 10–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input Power 10–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parallel Port 10–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ETS Input 10–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Serial Port 10–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Environmental 10–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appendix A
Appendix B
Overview B–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1770-SB Data Recorder Using a Keyboard B–2. . . . . . . . . . . . . . . . . . . .
1770-SB Data Recorder Using an Industrial Terminal B–4. . . . . . . . . . .
1770-SA Data Recorder Using a Keyboard B–6. . . . . . . . . . . . . . . . . . .
1770-SA Data Recorder Using an Industrial Terminal B–8. . . . . . . . . . .
EPI STR-LINK Data Recorders B–10. . . . . . . . . . . . . . . . . . . . . . . . . . . .
STR-LINK II Switch Settings B–10. . . . . . . . . . . . . . . . . . . . . . . . . . . .
STR-LINK III Switch Settings B–10. . . . . . . . . . . . . . . . . . . . . . . . . . .
DL20 Configuration B–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting EPI STR-LINK Recorders B–11. . . . . . . . . . . . . . . . . . . . .
Operating Procedures B–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appendix C
Overview C–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
File Transfer Programs C–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
File Conversion C–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inserting the EPROM C–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appendix D
Overview D–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Panel Cutout Dimensions D–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Overall Dimensions D–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Flush Mount Panel Cutout Dimensions D–4. . . . . . . . . . . . . . . . . . . . . . .
Parallel Input Converter Dimensions D–5. . . . . . . . . . . . . . . . . . . . . . . .
Enclosure Dimensions D–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications
ASCII Character Set
Tape Recorder Setup
Creating EPROM Files
Dimensions

Dataliner Message Displays
DL20 Series
Table of Contents
vii
Appendix E
Overview E–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setting Baud Rate E–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appendix F
One Line Worksheet F–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Two Line Worksheet F–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Four Line Worksheet F–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appendix G
Overview G–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PLC-2 Programming Examples G–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Triggering Simple Messages (PLC-2) G–2. . . . . . . . . . . . . . . . . . . . . .
Rung Descriptions (Figure G.1) G–3. . . . . . . . . . . . . . . . . . . . . . . . . .
Get and Put Instructions (PLC-2) G–3. . . . . . . . . . . . . . . . . . . . . . . . .
Triggering Messages with Variable Data (PLC-2) G–4. . . . . . . . . . . .
Rung Descriptions (Figure G.2) G–7. . . . . . . . . . . . . . . . . . . . . . . . . .
PLC-5 Programming Examples G–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rung Descriptions (Figure G.3) G–10. . . . . . . . . . . . . . . . . . . . . . . . . .
Complete Instruction G–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Triggering Messages with Variable Data G–11. . . . . . . . . . . . . . . . . . . .
Rung Descriptions (Figure G.4) G–14. . . . . . . . . . . . . . . . . . . . . . . . . .
DL20 Parallel Port Configuration G–15. . . . . . . . . . . . . . . . . . . . . . . . . . .
Variable Data Update Times G–16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parallel Interface Connections G–17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appendix H
Description H–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PLC Output / DL20 Input Signals H–3. . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation H–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Display Mounted Version (Catalog No. 2706-NG1) H–4. . . . . . . . . . .
Panel Mounted Version (Catalog No. 2706-NG2) H–5. . . . . . . . . . . . .
Connecting the AC Inputs H–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setting Keyboard
Baud Rate
Message Display
Worksheets
Application Notes
120 VAC Parallel
Input Converters

Dataliner Message Display
DL20 Series
Table of Contents
viii
Figures
Menu Flowchart 3–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Edit Mode Menu for 2 Line DL20 4–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Serial Port Connectors 6–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parallel Port Connectors 7–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using Discrete Outputs With the Parallel Port 7–2. . . . . . . . . . . . . . . . . . .
11 Output Configuration 7–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10 Output Configuration 7–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Output Configuration 7–16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Special Functions Menu 8–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Print Messages Menu 8–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tape Operations Menu 8–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
EPROM Operations Menu 8–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Clock Operations Menu 8–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reset Operation Menu 8–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Set Up I/O Operations Menu 8–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Set Up Master Operations Menu 8–19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DL20 Connection Terminals 9–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting IBM XT (25-Pin) or Compatible 9–5. . . . . . . . . . . . . . . . . . . .
Connecting IBM AT (9-Pin) or Compatible 9–5. . . . . . . . . . . . . . . . . . . . .
Connecting Allen-Bradley 1775-GA Module 9–6. . . . . . . . . . . . . . . . . . . .
Connecting Allen-Bradley 1771-DB Module 9–6. . . . . . . . . . . . . . . . . . . .
Connecting Allen-Bradley Industrial or Most Dumb DTE
Type Terminals 9–7
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cable Diagram (Catalog No. 2706-NC1) 9–8. . . . . . . . . . . . . . . . . . . . . . . .
Connecting DEC VT Series Terminals 9–8. . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting DL10 Slaves 9–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting Addressable DL20 Masters 9–10. . . . . . . . . . . . . . . . . . . . . . . . .
Connecting a DL20 to Allen-Bradley 1771-DB Basic Module 9–11. . . . .
Connecting DL20s to Allen-Bradley 1771-DB Basic Module 9–11. . . . . .
Data Recorder (Catalog No. 1770-SB) with
Keyboard (2706-NK1 or -NK2) B–2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Data Recorder (Catalog No. 1770-SB) with Industrial Terminal B–4. . . .
Data Recorder (Catalog No. 1770-SA) with
Keyboard (2706-NK1 or -NK2) B–6
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Data Recorder (Catalog No. 1770-SA) with Industrial Terminal B–8. . . .
EPI STR-LINK Data Recorder B–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Message EPROM Socket C–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Panel Cut Out Dimensions D–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
One and Two Line DL20 Dimensions D–2. . . . . . . . . . . . . . . . . . . . . . . . . .
Four Line DL20 Dimensions D–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Flush Mount Panel Cut Out Dimensions D–4. . . . . . . . . . . . . . . . . . . . . . . .
Panel Mounted Converter (Catalog No. 2706-NG1) Dimensions D–5. . .
3
.
1
4
.
1
6
.
1
7
.
1
7
.
2
7
.
3
7
.
4
7
.
5
8
.
1
8
.
2
8
.
3
8
.
4
8
.
5
8
.
6
8
.
7
8
.
8
9
.
1
9
.
2
9
.
3
9
.
4
9
.
5
9
.
6
9
.
7
9
.
8
9
.
9
9
.
10
9
.
11
9
.
12
B.
1
B.
2
B.
3
B.
4
B.
5
C
.
1
D.
1
D.
2
D.
3
D.
4
D.
5

Dataliner Message Displays
DL20 Series
Table of Contents
ix
Display Mounted Converter (Catalog No. 2706-NG2) Dimensions D–6.
Enclosure Dimensions D–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Triggering Messages Using Individual Inputs (PLC-2) G–2. . . . . . . . . . . .
PLC-2 Ladder Program (Messages with Variable Data) G–6. . . . . . . . . . .
Triggering Messages Using Individual Inputs (PLC-5) G–9. . . . . . . . . . . .
PLC-5 Ladder Program (Messages with Variable Data) G–13. . . . . . . . . . .
Parallel Input Converter to AC Output Module G–18. . . . . . . . . . . . . . . . . .
DL20 to DC Output Module (Catalog No. 1771-OB, -OG) G–19. . . . . . . .
DL20 to High Density DC Output Module (Catalog No. 1771-OBD) G–20
Series A and B Parallel Input Converter Block Diagram H–2
. . . . . . . . . .
Series C and Later Parallel Input Converter Block Diagram H–2. . . . . . .
D.
6
D.
7
G
.
1
G
.
2
G
.
3
G
.
4
G
.
5
G
.
6
G
.
7
H
.
1
H
.
2

Dataliner Message Display
DL20 Series
Table of Contents
x
Tables
Chapter Descriptions 1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Related Publications 1–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accessories 2–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Edit Commands 4–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage Levels for Each Logic State 7–3. . . . . . . . . . . . . . . . . . . . . . . . .
Binary Data Line Values 7–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
BCD Data Line Values 7–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Strobe Commands 7–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Binary Data Line Values Using HDAT Strobe 7–6. . . . . . . . . . . . . . . . .
BCD Data Line Values Using HDAT Strobe 7–6. . . . . . . . . . . . . . . . . . .
ETS Voltage and Current Requirements 7–9. . . . . . . . . . . . . . . . . . . . . .
Serial Port Defaults 8–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parallel Port Defaults 8–17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Strobe Line Mnemonics 8–18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Illegal Master Addresses 8–21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PLC-2 Sequencer Outputs G–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PLC-5 Sequencer Outputs G–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MTBM Values H-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1
.A
1
.B
2
.A
4
.A
7
.A
7
.B
7
.
C
7
.D
7
.E
7
.
F
7
.
G
8
.A
8
.B
8
.
C
8
.D
G
.A
G
.B
H
.A

A–B 1
Chapter
1–1
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
•Conventions used
•Related publications
This manual instructs you on how to install and use your Dataliner DL20
Series G display. This manual is divided into the following chapters.
Table 1.A
ChapterDescriptions
Chapter Title Purpose
1Using this Manual Provides an overview of the manual.
2Introduction to the DL20 Describes the main features and
operating capabilities of the DL20.
3Getting Started Provides instructions for the initial
desktop hookup along with a description
of the menus and prompts.
4Entering, Reviewing, and Editing
Messages Provides step-by-step instructions on
how to enter a message along with
message attributes.
5The Run Mode Describes the operation of the DL20 in
the run mode.
6Using the Serial Port Describes the connections to and
operation of the serial port.
7Using the Parallel Port Describes the connections to and
operation of the parallel port.
8Special Functions Describes the functions available under
the Special Functions menu.
9Installation and Maintenance Provides instructions on how to install the
DL20. Fuse replacement is described.
10 Specifications Mechanical, electrical, and environmental
specifications.
Appendices, Glossary, Index
Chapter Objectives
Manual Overview

Chapter 1
Using this Manual
1–2
No special knowledge is needed to enter or edit messages. However, since
the Dataliner message display must be connected to peripheral equipment,
you should be familiar with computer communication terminology.
The following conventions are used:
•Messages that are displayed on the DL20 are shown centered and in bold
characters. For example:
EDIT?
•A symbol or word in brackets represent a single key that you should
press. These include keys such as [Y] or [Esc].
•Since the DL20 can be programmed with a variety of terminals, the
printing on your terminal keyboard may be different than the symbol or
word indicated in brackets. In this manual, we use [Return] to specify the
carriage return function of the keyboard. On your keyboard this may
correspond to the [ENTER] or [ ] keys.
•In the following chapters we refer to the Dataliner DL20 Series Message
Display as the DL20.
Table 1.B lists the additional publications you may require.
Table 1.B
RelatedPublications
Publication / Catalog
Number Title
2706-800 Dataliner DL10 Series User Manual
2706-804 Dataliner DL20 Offline Programming Software User Manual
1771-6.5.34 BASIC Module (Catalog No. 1771-DB) User’s Manual
1746-ND005 SLC-500TM BASIC Module (Catalog No. 1746–BAS)
Design and Integration Manual
1775-6.5.4 Peripheral Communications Module (Catalog No. 1775-GA)
User Manual
Intended Audience
Conventions Used
Related Publications

A–B 2
Chapter
2–1
Introduction to the DL20
This chapter describes some of the key features and operating capabilities of
the DL20. For more detailed information, refer to the section of the manual
that describes the use of the feature or operating capability.
Dataliner DL20 Message Displays can store up to 1022 messages of varying
lengths and are available in three versions:
•1 line by 20 characters
•2 lines by 20 characters
•4 lines by 20 characters
The operation of the 1, 2, and 4 line displays are similar. Exceptions are
noted in this manual.
The 20 character alphanumeric Vacuum Fluorescent Display (VFD) can be
read from a distance of:
•30 feet (9.1 meters) on the 1 line display
•25 feet (7.6 meters) on the 2 and 4 line displays
The DL20 can display:
•Uppercase and lowercase letters
•Punctuation marks
•Special symbols (see Appendix A)
You program messages using:
•Keyboards (Catalog No. 2706-NK1 or -NK2)
•RS-232 terminal
•Allen-Bradley Industrial Terminals
•DEC VT series terminals
Messages are stored in DL20 memory which is maintained by a lithium
battery-backed power supply. The lithium battery is part of the internal
circuitry, no additional batteries are required. An EPROM for nonvolatile
message storage can override the message RAM (on 16K or 8K units).
Chapter Objectives
Overview of DL20

Chapter 2
Introduction to the DL20
2–2
Message Editing Software
You configure and enter messages into the DL20 by attaching an optional
keyboard, RS-232 CRT, or dumb terminal. The DL20 display prompts you
with easy to follow questions and instructions simplifying setup and
configuration. Using a terminal or printer, you can list operating parameters
such as baud rate or parity.
A DL20 time and date clock lets you display and/or print the time and date
with a message.
A debug mode verifies the operation of the host controller program.
You can also perform self test functions.
Optional Offline Programming Software
DL20 Offline Programming Software (Catalog No. 2706-NP3) for IBM or
compatible computers lets you create, edit, and store messages on a personal
computer. You can then download messages to the DL20 using a
communications cable.
Storing Messages
You can store DL20 messages on:
•Tape using an Allen-Bradley Data Recorder (Catalog No.1770-SA, -SB)
or EPI STR-LINK II, III Data Recorder.
•Disk when using the DL20 Offline Programming Software.
All tape and computer operations (writing, reading, write verify, and read
verify) are automatic with easy to follow prompting from the DL20.

Chapter 2
Introduction to the DL20
2–3
Addressable Master
The addressable master feature allows you to connect 100 DL20s to a single
RS-422 port on the controller. Each display has its own unique address. The
controller can command any one, or all of the DL20s on the network to
display a message.
Slave Mode Master
The DL20 can operate as a slave device. In run mode, special commands
place the DL20 into slave mode. As a slave device, the DL20 does not
respond to message triggers, but displays strings of ASCII text sent by
the controller.
Programmable Controller Interface
The host controller can trigger a message display using either:
•Parallel Data Lines
The DL20 has ten data lines and two strobe lines which accept DC input
voltages from 5 to 30 volts.
The optional Parallel Input Converters (Catalog No. 2706-NG1, -NG2)
allow the DL20 to accept 120VAC input signals. The logic program
in the controller turns some lines ON and some OFF. The DL20
recognizes this combination as a message number.
!ATTENTION: Parallel Input Converters (Catalog No.
2706-NG1, -NG2) cannot accept 220/240VAC. If 220/240VAC is
applied to the Parallel Input Converter, damage to the input
converter will occur.
•RS-422 / RS-232 Serial Ports
Both the RS-232 and RS-422 ports accept serial commands and variable
message data. The serial commands are formatted and recognized
identically to the parallel commands. The only difference between the
two is the wiring of the signals and the host controller program.
Host and Slave Devices

Chapter 2
Introduction to the DL20
2–4
Auxiliary Devices
Messages that display on the DL20 can be sent to a printer with the
time and date.
On large machines, or on production lines, you may want to use a remote
display. The DL20 can connect to 100 slave DL10 displays (up to 4000
feet away). Each DL10 can have a different address. You can define, on a
message-by-message basis, the slave display on which a triggered message
appears. Triggered messages can be sent to individual or all slaves.
Power On Testing
When power is first applied to the DL20, a series of test programs are run.
They check the circuitry in the display and the integrity of messages stored in
memory. You can run these test programs from the programming keyboard
or a controller program.
Autorun
The autorun feature allows the display to restart in run mode on powerup if
the display was turned off in run mode. A message displays for three
seconds indicating that the DL20 is entering the autorun mode. An autorun
message, if present, is the first message displayed.
Note: All diagnostics must pass before the DL20 restarts in run mode. In
addition, the user memory must not have been lost while the power was off.
CPU ACTIVE Light
The CPU ACTIVE light on the front panel must receive a periodic signal
from the CPU to illuminate. Its normal appearance ranges from periodic
flashing to steady illumination.
Self Testing and Diagnostics

Chapter 2
Introduction to the DL20
2–5
Background Message
The background message is a user-defined message that automatically
displays when no other messages are being displayed.
Invisible Message
Invisible messages do not appear on the display when triggered, nor do they
affect what is on the display. Invisible messages can be sent to slaves,
printed, or saved in the Historical Event Stack.
Special Messages
Sixteen preprogrammed messages are available to trigger specific functions.
They can clear the display, reset the DL20, test batteries, print Historical
Event Stack, clear the Historical Event Stack, halt run mode and start run
mode. Special messages are optional and can simplify programming
requirements.
Formatted Variables with Decimal Point
You can imbed a formatted variable with a decimal point in a message.
When programming a message variable, you can specify:
•number of spaces the variable will occupy
•where to place the decimal point
•whether leading zeros should appear or be replaced by blanks
Data Trigger Modes
Separate data modes are available for inputting message triggers and
variables through the parallel port. Message triggers can be binary, while
variable data can be BCD, or vice versa.
Dynamic Message Chaining
Dynamic chaining allows you to load 20 message triggers into the DL20
causing those messages to display over and over again.
Historical Event Recording
Historical Event Recording allows the DL20 to remember messages that
were displayed. These messages can then be printed all at once or at a later
time. See Chapters 4 and 5 for details on Historical Event Recording.
Baud Rate
The DL20 supports baud rates of 300, 1200, 9600. On powerup, the DL20
displays the baud rate currently in effect.
Parity
The DL20 can transmit data with odd, even or no parity. Data received by
the DL20 is not checked for parity. The parity you select is displayed
immediately after the baud rate on powerup.
Message
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Chapter 2
Introduction to the DL20
2–6
Table 2.A lists the optional accessories.
Table 2.A
Accessories
Item Description Catalog No.
DL20 Cable Connects Allen-Bradley Industrial Terminals T1 through
T4 or most DTE type dumb terminals.
(Male 25 pin D-shell) 2706-NC1
DL20 Cable
Connects Allen-Bradley Terminals 1784-T45, -T47, -T50,
-T60, other IBM compatibles or DEC VT52, VT100, or
VT101 Terminals. (Female 25-pin D-shell)
Use 25 to 9-Pin AT Adapter with this cable for 1784-T50
or -T60 Industrial or IBM AT computers.
2706-NC2
Data Recorder
Cable Connects EPI STR-LINK II or III Data Recorders to DL20. 2706-NC3
Data Recorder
Cable Connects Allen-Bradley 1770-SB or -SA Data Recorders to DL20. 2706-NC4
A-B Terminal
Cable
Connects A-B Terminals to EPI STR-LINK II or III Data
Recorders. Cable is required if an Allen-Bradley
Industrial Terminal and EPI STR-LINK II or III Data
Recorder is used. Cable is not needed if programming
keyboards (Catalog No. 2706-NK1 or -NK2) are used.
2706-NC5
DL20
Development
Software Off-line Programming Software for IBM or compatible
computers with 5.25 inch or 3.5 inch disk drive. 2706-NP3
Keyboard Full travel keyboard 2706-NK1
Keyboard Membrane keyboard 2706-NK2
Addressing Bar Allows DIP switch selection of an address when multiple
DL20s are on an RS-422 network. If Addressing Bar is
not used, address is selected during programming. 2706-NF1
120V Parallel
Input Converter
Connects to the DL20 parallel input port and allows
messages to be triggered using 120 VAC inputs.
Display Mounted Converter
Panel Mounted Converter 2706-NG1 2706-NG2
Enclosure
NEMA Type 12/13 enclosure with mounting holes and
cutout for DL20. Access door has gasket.
One or Two Line Displays
Four Line Displays 2706-NE1 2706-NE2
Flush
Mounting Kits
Eliminates the standard bezel supplied with the display.
One or Two Line Displays
Four Line Displays 2706-NJ1
2706-NJ2
Accessories