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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
INTRODUCTION.........................................................................................1
Figure 1. Example of an RS-485/422 Multi-Node Network.......................1
CHECKLIST ...............................................................................................1
SPECIFICATIONS........................................................................................2
Figure 2. Top View of Circuit Board...........................................................2
PORT CONFIGURATION..............................................................................2
RS-485/422 Port ..................................................................................2
Table 1. RS-422/485 Port ......................................................................3
RS-232 Port .........................................................................................3
Table 2. RS-232 DTE DB25P Connector Chart.....................................4
RS-422/485 Wiring ..............................................................................4
2-Wire Mode........................................................................................4
Table 3. Component Values For Send Data Timing...............................5
Figure 3. RS-485 Wiring Diagram .............................................................6
4-Wire Mode........................................................................................6
Figure 4. RS-422 Wiring Diagram .............................................................7
RS-485 AND RS-422 TERMINATION.........................................................7
POWER SUPPLY.........................................................................................7
OPERATION...............................................................................................8
Figure 5. Simplified Functional Diagram...................................................9
COMMUNICATION CONFIGURATION ..........................................................9
DISTRIBUTED SMART SWITCH COMMANDS...............................................9
The Command String.........................................................................10
ON Command ....................................................................................10
OFF Command..................................................................................11
STATUS REQUEST Command..........................................................11
SETTING THE 485DSS ADDRESS.............................................................14
Table 4. Address Switch.......................................................................14
BINARY FILE TRANSFER .........................................................................15
CHAPTER 2: SOFTWARE...................................................................16
DESCRIPTION.........................................................................................16
HARD DRIVE INSTALLATION...................................................................16
RUNNING DEMONSTRATION PROGRAM.................................................17
APPENDIX A: ASCII CHARACTER CODES .................................A-1
APPENDIX B: DECIMAL/HEXADECIMAL CONVERSIONS......B-1
Table 5. Hex/Dec Conversions................................................................B-1