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www .omega.com e-mail: info@omega.com U ser ’ s Guide OMG-USB-SER-2 T wo Por t RS-232/422/485 to USB Adaptor Shop online at.
Contents I NTRODUCTION ..........................................................................1 O VERVIEW ................................................................................................ 1 W HAT ’ S I NCLUDED .....................
A PPENDIX D - A SYNCHRONOUS C OMMUNICATIONS ...............14 A PPENDIX E - C OMPLIANCE N OTICES .....................................15 F EDERAL C OMMUNICATIONS C OMMISSION S TATEMENT ............ 15 C ANADIAN R ADIO I NTERFERENCE R EGULATIONS ......
Introduction OMG - USB - SER - 2 Page 1 Introduction Overview The OMG - USB - SER - 2 equips the PC with 2 USB to RS - 232/422/485 Asynchronous serial ports providing a versatile interf ace for common serial needs.
Installation OMG - USB - SER - 2 Page 2 Installation Operating System Installation Choose Install Software at the beginning of the CD and install SeaCOM . System Installation The screen captures below are taken from a Windows 98 installat ion. Your particular operating system may differ slightly from what is shown based on your version of Windows.
Installation OMG - USB - SER - 2 Page 3 You can access your new COM: ports by using the assigned COM: identifiers as shown above. In this case, it is COM 3 and 4. However, this assignment will vary from system to system. At this point, the hardware i s recognized and ready to use.
Configuration OMG - USB - SER - 2 Page 4 Configuration Original configuration This device ships with the following configuration. 422 mode, 120 ohm termination, 1K ohm pull up on RX+ 1K ohm pull down on RX - In order to change this configuration the box mus t be opened.
Configuration OMG - USB - SER - 2 Page 5 Switch Descriptions Figure 1 : Switch SW4 L 4 85 option, OFF for 422. OFF: No effect ON : Connects TX+ to RX+ for two - wire operation L 485 option, OFF for 422. OFF: No effect ON : Connects TX - to RX - for two - wire operation PU 485 option, OFF for 422.
Configuration OMG - USB - SER - 2 Page 6 Switch Examples Figure 2 : R S422/485 Interface Configuration 485 Mode Selection OFF : 422 Mode The transmitter lines TX+ and TX - are always driven ON : 485 M.
Configuration OMG - USB - SER - 2 Page 7 Switch Examples Continued Port 2 Port 1 Figure 3 : Electrical Interface Configuration Port 1 : RS - 232 The corresponding shunt is in the 232 position. The switches will have no effect. Port 2 : RS - 485 two wire communication with no echo.
Technical OMG - USB - SER - 2 Page 8 Technical Description The OMG - USB - SER - 2 utilizes two USB UARTs. These chips feature programmable baud rate, data format, 128 byte Dual Port TX Buffer, and 384 byte Dual Port RX Buffer. The RS - 232/422/485 transceiver supports data rates u p to 921.
Specifications OMG - USB - SER - 2 Page 9 Specifications Environmental Specifications Specification Operating Storage Temperatu re Range 0º to 50º C (32º to 122º F) - 20º to 70º C (- 4º to 158º F) Humidity Range 10 to 90% R.H. Non - Condensing 10 to 90% R.
Appendix A – Troubleshooting OMG - USB - SER - 2 Page 10 Appendix A - Troubleshooting Serial Utility t est software is supplied with the adapter and will be used in the troubleshooting procedures. Using this software and following these simple steps, most common problems can be eliminated without the need to call Technical Support.
Appendix B – Ho w To Get Assistance OMG - USB - SER - 2 Page 11 Appendix B - How To Get Assistance Please refer to Appendix A - Troubleshooting prior to calling Techn ical Support. 1. Read this manual thoroughly before attempting to install the adapter in your system.
Appendix C - Electrical Interface OMG - USB - SER - 2 Page 12 Appendix C - Electrical Interface RS - 232 Quite possibly the most widely used communication standard is RS - 232. This implementation has been defined and revised several times and is often referred to as RS - 232 or EIA/TIA - 232.
Appendix C - Electrical Interface OMG - USB - SER - 2 Page 13 RS - 485 RS - 485 is backwardly compatible with RS - 422; however, it is optimized for partyline or multi - drop applications. The output of the RS - 422/485 driver is capable of being Active (enabled) o r Tri - State (disabled).
Appendix D - Asynchronous Communications OMG - USB - SER - 2 Page 14 Appendix D - Asynchronous Communications Serial data communications implies that individual bits of a character are transmitted con secutively to a receiver that assembles the bits back into a character.
Appendix E - Compliance Notices OMG - USB - SER - 2 Page 15 Appendix E - Compliance Notices Federal Communications Commission Statement This equipment has been tested and found to comply with the limits for Class B digital device, pursuant to Part 15 of the FCC Rules.
Appendix E - Compliance Notices OMG - USB - SER - 2 Page 16 EMC Directive Statement Products bearing the CE Label fulfill the requirements of the EMC directive (89/336/EEC) and of the low - voltage directive (73/23/EEC) issued by the European Commission.
W ARRANTY / DISCLAIMER OME GA ENGINEERING, INC. war rants this unit to be free of defects in materials and workmanship for a period of 1 3 months from date of purc hase. OM E G A ’ s W ARRANTY adds an additional one (1) month grace period to the normal one (1) year pr oduct warranty to cover handling and shipping time.
M 38 9 9 /0303 Where Do I Find Ever ything I Need for Pr ocess Measurement and Control? OM EGA…Of Course! Shop online at www .omega.com TEMPERA TURE Thermocouple, RTD & Thermistor Probes.
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Als u nog geen Omega OMG-USB-SER-2 heb gekocht dan nu is een goed moment om kennis te maken met de basisgegevens van het product. Eerst kijk dan naar de eerste pagina\'s van de handleiding, die je hierboven vindt. Je moet daar de belangrijkste technische gegevens Omega OMG-USB-SER-2 vinden. Op dit manier kan je controleren of het apparaat aan jouw behoeften voldoet. Op de volgende pagina's van de handleiding Omega OMG-USB-SER-2 leer je over alle kenmerken van het product en krijg je informatie over de werking. De informatie die je over Omega OMG-USB-SER-2 krijgt, zal je zeker helpen om een besluit over de aankoop te nemen.
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