B&B Electronics 485T - Manual

B&B Electronics 485T

B&B Electronics 485T – Manual, read for free online in PDF format. We hope this helps you resolve any issues you may have. If you have further questions, please contact us through the contact form.

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Table of Contents:

  • Page 2 – TABLE OF CONTENTS; B T
  • Page 3 – INTRODUCTION; The Model 485T Tester can be used to check the condition of
  • Page 4 – Both specifications discuss termination of the two-wire line. A; ELECTRONICS INDUSTRIES ASSOCIATION; Engineering Department
  • Page 8 – CONTROLS AND CONNECTIONS ON THE 485T; A and B Terminals; The two signal lines used in an RS-422 or RS-485 network
  • Page 9 – Threshold Pot; The large pot in the center of the 485T is the threshold pot. In; Positive Threshold Exceeded LED; The RS-422 Standard states that a network should not have a; Negative Threshold Exceeded LED; Both the RS-422 and the RS-485 Standards state that the
  • Page 10 – This switch controls the positive threshold voltage for the; Termination Switch; The 485T will work from a nine-volt battery or from 12 VDC; RS-232 Data Out Connector; If your data is garbled you may have the A and B lines
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Documentation Number 485T1995 Manual

Cover Page

B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350

PH (815) 433-5100 -- FAX (815) 433-5105

RS-422/RS-485 Line Tester

Model 485T

Documentation Number 485T1995




This product

Designed and Manufactured

In Ottawa, Illinois

USA

of domestic and imported parts by

B&B Electronics Mfg. Co. Inc.

707 Dayton Road -- P.O. Box 1040 -- Ottawa, IL 61350

PH (815) 433-5100 -- FAX (815) 433-5105



Internet:

http://www.bb-elec.com

[email protected]

[email protected]







1992 B&B Electronics -- Revised August 1992

Not Recommended for New Installations.

Please contact Technical Support for more information.

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Summary

Page 2 - TABLE OF CONTENTS; B T

Documentation Number 485T1995 Manual Table of Contents i B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350 PH (815) 433-5100 -- FAX (815) 433-5105 TABLE OF CONTENTS INTRODUCTION ............................................................................... 1 RS-422 AND RS-485 STANDARDS ..........

Page 3 - INTRODUCTION; The Model 485T Tester can be used to check the condition of

Documentation Number 485T1995 Manual 1 B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350 PH (815) 433-5100 -- FAX (815) 433-5105 INTRODUCTION The Model 485T Tester can be used to check the condition of signals at any node on an RS-422 or RS-485 network. The tester determines if the maximum perm...

Page 4 - Both specifications discuss termination of the two-wire line. A; ELECTRONICS INDUSTRIES ASSOCIATION; Engineering Department

2 Documentation Number 485T1995 Manual B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350 PH (815) 433-5100 -- FAX (815) 433-5105 high and vice-versa. Also, the drivers are capable of driving a wire with as much as 25 times more capacitance before the signal is badly distorted. Most system desig...

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