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6B21:  Isolated Current Output: Signal Conditioning Module

Product Details

The 6B Series of modules and boards provides the hardware needed to implement a flexible, distributed monitoring and control application. By selecting only the modules and interfaces needed and connecting them via RS-485, the data acquisition and control strategy can be designed for optimum location of the I/O as well as minimizing sensor runs. The modularity and configurability of the 6B Series also makes them very cost effective.


  • Process Current Output (0-20mA or 4-20mA)
  • RS-485 Interface
  • Programmable Slew Rate
  • National Instruments Labview Supported

Functional Block Diagram for 6B21G


Title Content Type File Type
6B21: Isolated, Field Configurable Analog Input Data Sheet  (Rev 0, 01/1999) (pdf, 356 kB) Data Sheets PDF
AN-535: Digital Input/Output Subsystems  (pdf, 336 kB) Application Notes PDF
AN-541: Proper System Grounding Techniques for 6B Series Systems  (pdf, 32 kB) Application Notes PDF
Make vs. Buy! When Should I Reinvent the Wheel?
(Analog Dialogue, Vol. 33, No. 10, November-December, 1999)
Analog Dialogue HTML
6B Series Power Supplies Power Supplies HTML
6B Series Configuration Guide Configuration Guides HTML
IOS Custom Product Worksheet
As a Design Subcontractor, IOS believes it essential to engage with our customers early in the development cycle. Complete the form and it will be reviewed and you will be contacted by one of our design specialists.
Custom Product Worksheet HTML
7B Series Backplanes Backplanes HTML
6B Series Backplanes Backplanes HTML
Selecting the Right Signal Conditioning Series for Your Application Overview HTML
All Series Modules Overview HTML
IOS 3 Year Warranty  (pdf, 23 kB) Overview PDF
6B Series Overviews Overview HTML
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
6B Series I/O Subsystem Software Tools
  • 6B&VB.ZIP  (zip, 434 kB)
    Example 6B Visual Basic Program using Custom Controls, therefore Professional Visual Basic is REQUIRED. 445184 10-13-93
  • 6B.TRM
    Example Windows 3.1 Terminal (.TRM) configuration file to communicate with 6B modules. 4096 04-13-95 (TRM, 4,096)
  • 6B_1.EXE
    6B Series Drivers (Version 1.0) for National Instruments LabVIEW & LabWindows/CVI. Note: This is a Self-Extracting file. Copy 6B_1.EXE into a sub-directory on your hard drive and type "6B_1". After the files are decompressed, delete 6B_1.EXE & then copy all the decompressed files onto a floppy disk. The 6B Drivers can now be installed from floppy disk. 1343777 08-23-95 (exe, 1,343,777 bytes)
  • 6B_2.EXE
    6B Series Drivers (Version 1.0) for National Instruments LabWindows for DOS. Note: This is a Self-Extracting file. Copy 6B_2.EXE into a sub-directory on your hard drive and type "6B_2". After the files are decompressed, delete 6B_2.EXE & then copy all the decompressed files onto a floppy disk. The 6B Drivers can now be installed from floppy disk. 126084 09-07-95 (exe, 126,084 bytes)
  • 6BACQURE.ZIP  (zip, 161 kB)
    Latest Labtech Acquire Package (rev. 1.2.6) for use with 6B modules. 165504 10-09-92
  • 6BCONF.ZIP  (zip, 109 kB)
    Latest version of 6B Configuration Disk. Version 2.11 (10/93) fixes Sixbccd program with 6B21s and running modules. 111616 10-25-93
    Simple steps to communicate with 6B moudules. 2048 08-26-92 (zip, 2,408 bytes)
    6B Product Benchmarks (Thru-put rates). 60032 10-12-94 (zip, 60,032)
    6B Series Configuration/Utilities Program (Rev 1.00) for Windows 3.1, Windows 95, & Windows NT. Note: This is a self-extracting file. Copy 6BWIN.EXE into a subdirectory on your hard drive, type "6BWIN". After extraction, delete 6BWIN.EXE & copy files to a floppy. Label disk "6B Series configuration/Utilities Disk". From A: or B: type "SETUP" to run the 6BWIN Installation Program. 300941 09-16-96 (exe, 305,677)
    'C' Libraries (Shareware) for using serial ports on the PC. This should help users programming applications with our 6B Modules. 84224 03-02-94 (zip, 84,224)
    Windows Conversion Utility Program for common temperature sensing devices. Sensors (Ver 1.2) Dated: Feb 15, 1994. 351525 08-24-95 (zip, 351,525 bytes)
I/O Subsystem Software Tools HTML

Evaluation Kits & Symbols & Footprints

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

SampleSample & Buy

Price, packaging, availability

6B21 Model Options
Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

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