Page 2 - Table of Contents; TABLE OF CONTENTS; SOFTWARE
485DSS3298 Manual Table of Contents 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 ................................................
Page 4 - The following items should be in the shipping carton:
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 Figure1. To accomplish this, the 485...
Page 5 - Specifications; Figure 2. Top View of Circuit Board; Port Configuration; The RS-485 port on the 485DSS receives and transmits data to
2 485DSS3298 Manual B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350 PH (815) 433-5100 -- FAX (815) 434-7094 Specifications Model: 485DSS Size: 4.8"L x 2.15"W x 0.9"H Power: +11 to 16 Vdc 75mA RS-232 Connection: DB-25 male (DTE configured) RS-485 Connection: Terminal Blocks Communi...
Page 6 - Description
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. It is necessary to have a basic unde...
Page 8 - Table 3. Component Values For Send Data Timing; Baud Rate
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-232port. After transmitting the last character, the send data...
Page 10 - A jumper labeled “TERM” provides termination for the RS-; Power Supply; The 485DSS requires an unregulated DC power source that will
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. The termination resistor is a 120-ohm resistorpl...
Page 11 - Operation; The host computer of the RS-485 network controls each
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 controls each 485DSS on the network by sending them command messages.These commands can turn a 485DSS on or off, and can alsorequest st...
Page 12 - Three red LED indicators are located on top of the 485DSS.; Communication Configuration; Before the HOST can communicate with a 485DSS, the; Distributed Smart Switch Commands; The 485DSS constantly monitors the serial data received on the; Figure 5. Simplified Functional Diagram
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 located on top of the 485DSS. The LED labeled TD flashes when the RS-232 device is transmittingdata. The LED labeled RD flashes when data is being received ...
Page 17 - Setting the 485DSS Address
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 BASIC to request status from address 5 decimal, you might form a string like this: DSS05RS$ = CHR$(19) + "0" + "5" + CHR$(6) You could ...
Page 18 - Binary File Transfer; When transmitting binary files through the Distributed Smart
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). Example 2: To set the address to 123 decimal (7B hex), turn on switches 1...
Page 19 - To install on your hard drive follow these steps:
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 examplesof how to receive and transmit comma...
Page 20 - Running Demonstration Program
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” sectionabove. Make sure you have...
Page 21 - Appendix A; Appendix A: ASCII Character Codes
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 TABLE DEC HEX ASCII KEY DEC HEX ASCII DEC HEX ASCII DEC HEX ASCII 0 0 NUL ctrl @ 32 20 SP 64 40 @ 96 60...
Page 22 - Decimal
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 symbolhaving a val...
Page 23 - Appendix B; Hexadecimal to Decimal Conversion:; Each “Hex digit” is the decimal equivalent value of the; Decimal to Hexadecimal Conversion:; Convert 4348 decimal to hexadecimal.
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. Decimal = (1st ...
Page 24 - Appendix C; Appendix C: Cable Charts; These charts indicate some common cable wiring based on the
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 PortConfiguration section of this manu...
Page 26 - FCC Class A Equipment Statement; Class A Equipment; This equipment has been tested and found to comply with the
FCC Class A Equipment Statement FEDERAL COMMUNICATIONS COMMISSION RADIO FREQUENCY INTERFACE STATEMENT Class A Equipment This equipment has been tested and found to comply with the limits for Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable...