Instruction/ maintenance manual of the product 485T B&B Electronics
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Docum ent ation Num ber 485T1995 Manual Cover Page B&B Electronics -- P O Box 1040 -- Ottaw a, IL 61350 PH (815) 433-5100 -- FA X (815) 433-5105 RS-422/RS-485 Line T ester Model 485T Docum ent ation Nu m ber 485T1995 This pr oduct Designed and M anufact ured In Ottawa , Illinois USA of do mestic and im porte d parts by B&B Electroni cs Mfg.
Docum ent at ion Number 485T1995 Manual Table of Content s i B&B Electronics -- P O Box 1040 -- Ottaw a, IL 61350 PH (815) 433-5100 -- FA X (815) 433-5105 TA BLE OF CONTENTS INTRODUCT ION ...........................................................
Docum ent ation Num ber 485T1995 Manual 1 B&B Electronics -- P O Box 1040 -- Ottaw a, IL 61350 PH (815) 433-5100 -- FA X (815) 433-5105 INTRODUCTIO N The Model 485T Tes ter can be used to c heck the condition of signals at any node on an RS-422 or RS-485 network.
2 Documentation Num ber 485T1995 Manual B&B Electronics -- P O Box 1040 -- Ottaw a, IL 61350 PH (815) 433-5100 -- FA X (815) 433-5105 high and vice-vers a. Also, the drivers are capable of driving a wire with as muc h as 25 tim es m ore capacitanc e before the s ignal is badly distorted.
Docum ent ation Num ber 485T1995 Manual 3 B&B Electronics -- P O Box 1040 -- Ottaw a, IL 61350 PH (815) 433-5100 -- FA X (815) 433-5105.
4 Documentation Num ber 485T1995 Manual B&B Electronics -- P O Box 1040 -- Ottaw a, IL 61350 PH (815) 433-5100 -- FA X (815) 433-5105.
Docum ent ation Num ber 485T1995 Manual 5 B&B Electronics -- P O Box 1040 -- Ottaw a, IL 61350 PH (815) 433-5100 -- FA X (815) 433-5105.
6 Documentation Num ber 485T1995 Manual B&B Electronics -- P O Box 1040 -- Ottaw a, IL 61350 PH (815) 433-5100 -- FA X (815) 433-5105 CONTROLS A ND CONNECTIONS ON THE 485T A and B Terminals The two signal lines us ed in an RS-422 or RS-485 network should be labeled A and B.
Docum ent ation Num ber 485T1995 Manual 7 B&B Electronics -- P O Box 1040 -- Ottaw a, IL 61350 PH (815) 433-5100 -- FA X (815) 433-5105 Threshold Pot The large pot in the c enter of the 485T is the thres hold pot. In order f or RS-422/485 to work properly, y ou should have a differ ential input voltage of m ore than .
8 Documentation Num ber 485T1995 Manual B&B Electronics -- P O Box 1040 -- Ottaw a, IL 61350 PH (815) 433-5100 -- FA X (815) 433-5105 RS-422/RS-485 Sw itch This switch controls the positive threshold voltage f or the Positive Thr eshold LED only. W hen the switch is in the RS-422 position, the positive thres hold is +7 volts.
Docum ent ation Num ber 485T1995 Manual 9 B&B Electronics -- P O Box 1040 -- Ottaw a, IL 61350 PH (815) 433-5100 -- FA X (815) 433-5105 RS-422/485 TEST A ty pical test on an RS- 422/485 network m ight go lik e this: First start by locating the two wi res us ed for the RS-422/485 network and try to determine which is A and which is B.
10 Docum ent ation Num ber 485T1995 Manual B&B Electronics -- P O Box 1040 -- Ottaw a, IL 61350 PH (815) 433-5100 -- FA X (815) 433-5105 See B&B Electronics ' fr ee RS-422/485 Application Note for inform ation on proper wiring and grounding of an RS-422/485 network.
Docum ent ation Num ber 485T1995 Manual 11 B&B Electronics -- P O Box 1040 -- Ottaw a, IL 61350 PH (815) 433-5100 -- FA X (815) 433-5105 You can then use the 485T T ester to m onitor the data that is being sent or rec eived on y our network.
12 Docum ent ation Num ber 485T1995 Manual B&B Electronics -- P O Box 1040 -- Ottaw a, IL 61350 PH (815) 433-5100 -- FA X (815) 433-5105.
An important point after buying a device B&B Electronics 485T (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought B&B Electronics 485T yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data B&B Electronics 485T - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, B&B Electronics 485T you will learn all the available features of the product, as well as information on its operation. The information that you get B&B Electronics 485T will certainly help you make a decision on the purchase.
If you already are a holder of B&B Electronics 485T, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime B&B Electronics 485T.
However, one of the most important roles played by the user manual is to help in solving problems with B&B Electronics 485T. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device B&B Electronics 485T along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
