Appendix E
Appendix E RS-485 Network E-
3
E.1 Basic Network Layout
Multi-drop RS-485 implies that there are two main wires in an segment.
The connected modules tap from these two lines with so called drop
cables. Thus all connections are parallel and connecting or
disconnecting of a node doesn’t affect the network as a whole. Since
ADAM modules use the RS-485 standard, and use an ASCII-based
commands set, they can connect and communicate with all ASCII-
based computers and terminals. The basic layouts that can be used for
an RS-485 network are:
Daisychain
The last module of a segment is a repeater. It is directly connected to
the main-wires thereby ending the first segment and starting the next
segment. Up to 32 addressable modules can be diasychained. This
limitation is a physical one. When using more modules per segment the
IC driver current rapidly decreases, causing communication errors.
Totally the network can hold up to 256 addressable modules. The
limitation for this number is the two number hexadecimal address codes
that know 256 combinations. The ADAM converter, ADAM repeaters
and the host computer are non addressable units and therefore are not
included in these numbers.
Figure E-1
Daisychaining
Summary of Contents for Data Acquisition Modules ADAM 4000
Page 1: ...ADAM 4000 Data Acquisition Modules User s Manual ...
Page 7: ...Introduction 1 ...
Page 11: ...Installation Guideline 2 ...
Page 28: ...I O Modules 3 ...
Page 98: ...Chapter 3 Chapter 3 I O Modules 3 71 Figure 3 69 ADAM 4069 Form A Relay Output ...
Page 104: ...Command Set 4 ...
Page 147: ...Analog Input Module Command Set 5 ...
Page 215: ...Analog Output Module Command Set 6 ...
Page 236: ...Digital I O Relay ouput and Counter Frequency Command Set 7 ...
Page 313: ...Calibration 8 ...
Page 329: ...Technical Specifications A ...
Page 335: ...Appendix A Appendix A Technical Specification A 7 Figure A 2 ADAM 4011D Function Diagram ...
Page 337: ...Appendix A Appendix A Technical Specification A 9 Figure A 3 ADAM 4012 Function Diagram ...
Page 339: ...Appendix A Appendix A Technical Specification A 11 Figure A 4 ADAM 4013 Function Diagram ...
Page 341: ...Appendix A Appendix A Technical Specification A 13 Figure A 5 ADAM 4016 Function Diagram ...
Page 343: ...Appendix A Appendix A Technical Specification A 15 Figure A 6 ADAM 4017 4017 Function Diagram ...
Page 349: ...Appendix A Appendix A Technical Specification A 21 Figure A 8 ADAM 4018M Function Diagram ...
Page 351: ...Appendix A Appendix A Technical Specification A 23 Figure A 9 ADAM 4019 Function Diagram ...
Page 355: ...Appendix A Appendix A Technical Specification A 27 Figure A 11 ADAM 4024 Function Diagram ...
Page 357: ...Appendix A Appendix A Technical Specification A 29 Figure A 12 ADAM 4050 Function Diagram ...
Page 377: ...Data Formats and I O Ranges B ...
Page 389: ...Technical Diagrams C ...
Page 392: ...Technical Diagrams C 4 ADAM 4000 Series User s Manual Figure C 3 DIN Rail Mounting ...
Page 394: ...Technical Diagrams C 6 ADAM 4000 Series User s Manual Figure C 5 Panel Mounting ...
Page 395: ...Appendix C Appendix C Technical Diagrams C 7 C 2 3 Piggyback Stack Figure C 6 Piggyback Stack ...
Page 396: ...Utility Software D ...
Page 404: ...RS 485 Network E ...
Page 411: ...How to use the Checksum feature F ...
Page 415: ...ADAM 4000 I O Modbus Mapping Table G ...
Page 428: ...Changing Configuration to Modbus Protocol H ...