E-2
ADAM 4000 Series User's Manual
RS-485 Network
ADAM modules are fully isolated and use just a single set of twisted pair
wires to send and receive! Since the nodes are connected in parallel they
can be freely disconnected from the host without affecting the functioning
of the remaining nodes. In industry shielded twisted pair is preferable due
to the high noise ratio of the environment.
When nodes communicate through the network, no sending conflicts can
occur since a simple command/response sequence is used. There is always
one initiator (with no address) and many slaves (with address). In this case
the master is a personal computer that is connected with its serial, RS-232,
port to an ADAM RS-232/RS-485 converter. The slaves are the ADAM I/
O modules. When modules are not transmitting data, they are in listen
mode. The host computer initiates a command/response sequence with one
of the modules. Commands normally contain the address of the module the
host wants to communicate with. The module with the matching address
carries out the command and sends its response to the host.
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 limitations for this number is the
two number hexadecimal address code that knows 256 combinations. The
ADAM converter, ADAM repeaters and the host computer are non
addressable units and therefore are not included in these numbers.
Summary of Contents for Adam 4000 Series
Page 1: ...ADAM 4000 Series Data Acquisition Modules User s Manual...
Page 2: ......
Page 7: ...1 Introduction...
Page 11: ...2 Installation Guideline...
Page 23: ...Chapter 2 Installation Guideline 2 13 Chapter 2 Figure 2 5 Simple ON OFF Controller Function...
Page 25: ...Chapter 2 Installation Guideline 2 15 Chapter 2...
Page 26: ...2 16 ADAM 4000 Series User s Manual Installation Guideline...
Page 27: ...I O Modules 3...
Page 37: ...Chapter 3 Chapter 3 I O Modules 3 11 Figure 3 9 RTD Inputs...
Page 45: ...Chapter 3 Chapter 3 I O Modules 3 19 Figure 3 15 Digital Output used with SSR...
Page 63: ...Chapter 3 Chapter 3 I O Modules 3 37 Application Wiring Figure 3 28 Analog Output...
Page 85: ...4 Command Set...
Page 124: ...Command Set 4 40 ADAM 4000 Series User s Manual...
Page 160: ...4 76 ADAM 4000 Series User s Manual Command Set...
Page 186: ...4 102 ADAM 4000 Series User s Manual Command Set 4018M...
Page 202: ...4 118 ADAM 4000 Series User s Manual Command Set...
Page 233: ...Chapter 4 Command Set 4 149 4021 Chapter 4...
Page 234: ...4 150 ADAM 4000 Series User s Manual Command Set 4021...
Page 272: ...4 188 ADAM 4000 Series User s Manual 4080 4080D Command Set...
Page 284: ...4 200 ADAM 4000 Series User s Manual Command Set 4080 4080D...
Page 303: ...Calibration 5...
Page 315: ...A Technical Specifications...
Page 323: ...Appendix A Technical Specifications A 9 Appendix A Figure A 3 ADAM 4012 Function Diagram...
Page 325: ...Appendix A Technical Specifications A 11 Appendix A Figure A 4 ADAM 4013 Function Diagram...
Page 327: ...Appendix A Technical Specifications A 13 Appendix A Figure A 5 ADAM 4014D Function Diagram...
Page 331: ...Appendix A Technical Specifications A 17 Appendix A Figure A 7 ADAM 4017 Function Diagram...
Page 339: ...Appendix A Technical Specifications A 25 Appendix A Figure A 10 ADAM 4021 Function Diiagram...
Page 341: ...Appendix A Technical Specifications A 27 Appendix A Figure A 11 ADAM 4050 Function Diagram...
Page 343: ...Appendix A Technical Specifications A 29 Appendix A Figure A 12 ADAM 4052 Function Diagram...
Page 347: ...Appendix A Technical Specifications A 33 Appendix A Figure A 14 ADAM 4060 Function Diagram...
Page 351: ...Appendix A Technical Specifications A 37 Appendix A Figure A 16 ADAM 4080D Function Diagram...
Page 352: ...Technical specifications A 38 ADAM 4000 Series User s Manual...
Page 353: ...B Data Formats and I O Ranges...
Page 368: ...B 16 ADAM 4000 Series User s Manual Data Formats and I O Ranges...
Page 369: ...C Technical Diagrams...
Page 372: ...C 4 ADAM 4000 Series User s Manual Technical Diagrams Figure C 3 DIN Rail Mounting...
Page 374: ...C 6 ADAM 4000 Series User s Manual Technical Diagrams Figure C 5 Panel Mounting...
Page 375: ...Appendix C Technical Diagrams C 7 Appendix C C 2 3 Piggyback Stack Figure C 6 Piggyback Stack...
Page 376: ...C 8 ADAM 4000 Series User s Manual Technical Diagrams...
Page 386: ...Utility Software D 10 ADAM 4000 Series User s Manual...