Instruction/ maintenance manual of the product 485DSS B&B Electronics
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Distributed Smart Switch Model 485DSS Document No. 485DSS3298 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) 434-7094 Internet: http://www.
485DSS3298 Manual Table of Cont ents i B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350 PH (815) 433-5100 -- FAX (815) 434-7094 TABLE OF CONTENTS CHAPTER 1: HARDWARE ................................................................... 1 I NTRODUCTION .
ii Table of Contents 485DSS3298 Manual B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350 PH (815) 433-5100 -- FAX (815) 434-7094 APPENDIX C: CABLE CHARTS ...................................................... C- 1 C HART 1. IBM PC DB25 C ONNECTOR TO .
485DSS3298 Manual 1 B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350 PH (815) 433-5100 -- FAX (815) 434-7094 Chapter 1: HARDWARE Introduction The RS-485 Distributed Smart Switch (485DSS) connects one RS-232 device to an RS-485 multi-node network as shown in Figure 1.
2 485DSS3298 Manual B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350 PH (815) 433-5100 -- FAX (815) 434-7094 Specifications Model: 485DSS Size: 4.
485DSS3298 Manual 3 B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350 PH (815) 433-5100 -- FAX (815) 434-7094 RS-232 Port The RS-232 DTE port is an asynchronous port that supports TD and RD signals. In order to make the proper connections to the RS- 232 port.
4 485DSS3298 Manual B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350 PH (815) 433-5100 -- FAX (815) 434-7094 RS-422/485 Wiring RS-485 receivers also have an enable/disable control line. The 2W/4W jumper selects when to enable and disable RS-485 receiver.
485DSS3298 Manual 5 B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350 PH (815) 433-5100 -- FAX (815) 434-7094 SD control automatically enables the RS-485 driver by sensing the leading edge of the first character transmitted to the RS-232 port.
6 485DSS3298 Manual B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350 PH (815) 433-5100 -- FAX (815) 434-7094 Figure 3. RS-485 Wiring Diagram 4-Wire Mode To configure the 485DSS for RS-485 or 422 four-wire mode, place the jumper in the 4 W position.
485DSS3298 Manual 7 B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350 PH (815) 433-5100 -- FAX (815) 434-7094 Figure 4. RS-422 Wiring Diagram RS-485 and RS-422 Termination A jumper labeled “TERM” provides termination for the RS- 485/422 receiver.
8 485DSS3298 Manual B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350 PH (815) 433-5100 -- FAX (815) 434-7094 Operation The host computer of the RS-485 network cont rols each 485DSS on the network by sending them command messages.
485DSS3298 Manual 9 B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350 PH (815) 433-5100 -- FAX (815) 434-7094 Three red LED indicators are loca ted on top of the 485DSS. The LED labeled TD flashes when the RS-232 device is transmitting data. The LED labeled RD flashes when data is being received by the 485DSS from the RS-485 network.
10 485DSS3298 Manual B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350 PH (815) 433-5100 -- FAX (815) 434-7094 The Command String All Command Strings consist of four ASCII characters. The first character is the start of message character, " X-off " (decimal 19).
485DSS3298 Manual 11 B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350 PH (815) 433-5100 -- FAX (815) 434-7094 If you were writing a program in BASIC to turn on address 10 decimal (0A hexadecimal.
12 485DSS3298 Manual B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350 PH (815) 433-5100 -- FAX (815) 434-7094 in the address field specifies all 485DSS's on the network. This command temporarily turns off (disconnect) the RS-232 port from the network while transmitting the reply message.
485DSS3298 Manual 13 B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350 PH (815) 433-5100 -- FAX (815) 434-7094 Example: A unit with a decimal address of ten will have a delay of 220 milliseconds [(10 x 0.
14 485DSS3298 Manual B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350 PH (815) 433-5100 -- FAX (815) 434-7094 If you were writing a program in BA SIC to request status from address 5 decimal, yo.
485DSS3298 Manual 15 B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350 PH (815) 433-5100 -- FAX (815) 434-7094 Example 1: To set the address to decimal 21 (15 hex), you would turn on switches 1, 3, and 5 (1 + 4 + 16 = 21).
16 485DSS3298 Manual B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350 PH (815) 433-5100 -- FAX (815) 434-7094 Chapter 2: SOFTWARE Description The Distributed Smart Switch Demonstration (DSS_DEMO) Program (IBM PC or Compatible) provides the user with examples of how to receive and transmit commands to the 485DSS.
485DSS3298 Manual 17 B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350 PH (815) 433-5100 -- FAX (815) 434-7094 Running Demonstration Program Before you can run the demonstration program, you must run the install program described in the “Hard Drive Installation” section above.
485DSS3298 Manual Appendix A A- 1 B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350 PH (815) 433-5100 -- FAX (815) 434-7094 Appendix A: ASCII Character Codes DECIMAL to HEX to ASCII CONVERSION TA.
485DSS3298 Manual Appendix B B- 1 B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350 PH (815) 433-5100 -- FAX (815) 434-7094 Appendix B: Decimal/Hexadecimal/Conversions The decimal (base 10) numbering system represents each position in successive powers of 10, with each decimal symbol having a value from 0 to 9.
B- 2 Appendix B 485DS32985 Manual B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350 PH (815) 433-5100 -- FAX (815) 434-7094 Hexadecimal to Decimal Conversion: Each “Hex digit” is the decimal equivalent value of the hexadecimal symbol. Example: Convert 10FC hexadecimal to decimal.
485DSS3298 Manual Appendix C C- 1 B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350 PH (815) 433-5100 -- FAX (815) 434-7094 Appendix C: Cable Charts These charts indicate some common cable wiring based on the 485DSS RS-232 and RS-485/422 ports. Refer to the Port Configuration section of this manual for more information.
C- 2 Appendix C 485DS32985 Manual B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350 PH (815) 433-5100 -- FAX (815) 434-7094 Chart 4. RS-232 DCE Device w/DB9 Connector to 485DSS RS-232 (DTE) Port .
FCC Class A Equipm ent Statem ent FEDERA L COMM UNI CA TIONS COM MISSI ON RA DIO FREQ UENCY I NTERFA CE STA T EMENT Class A Equipmen t This equipm ent has been test ed and found to com ply wi th the limits for Class A digital device, pur suant to Part 15 of the FCC Rules.
An important point after buying a device B&B Electronics 485DSS (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 485DSS 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 485DSS - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, B&B Electronics 485DSS 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 485DSS will certainly help you make a decision on the purchase.
If you already are a holder of B&B Electronics 485DSS, 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 485DSS.
However, one of the most important roles played by the user manual is to help in solving problems with B&B Electronics 485DSS. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device B&B Electronics 485DSS 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
