Instruction/ maintenance manual of the product OMG-USB-SER-2 Omega
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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.
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An important point after buying a device Omega OMG-USB-SER-2 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Omega OMG-USB-SER-2 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Omega OMG-USB-SER-2 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Omega OMG-USB-SER-2 you will learn all the available features of the product, as well as information on its operation. The information that you get Omega OMG-USB-SER-2 will certainly help you make a decision on the purchase.
If you already are a holder of Omega OMG-USB-SER-2, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Omega OMG-USB-SER-2.
However, one of the most important roles played by the user manual is to help in solving problems with Omega OMG-USB-SER-2. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Omega OMG-USB-SER-2 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
