Instruction/ maintenance manual of the product Four Port RS-232/422/485 to USB Adaptor Omega
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www .omega.com e-mail: info@omega.com U ser ’ s Guide OMG-USB-SER-4 Four Por t RS-232/422/485 to USB Adaptor Shop online at.
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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 - 4 Page 1 Introduction Overview The OMG - USB - SER - 4 equips the PC with 4 USB to RS - 232/422/485 Asynchronous serial ports providing a versa tile interface for common serial needs.
Installation OMG - USB - SER - 4 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 9 8 installation. Your particular operating system may differ slightly from what is shown based on your version of Windows.
Installation OMG - USB - SER - 4 Page 3 You can access your new COM: ports by using the assigned COM: identifiers as shown above. In this case, it is COM3, 4, 5 and 6. However, this assignment will vary from system to system. At this point , the hardware is recognized and ready to use.
Con figuration OMG - USB - SER - 4 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 configurat ion the box must be opened.
Con figuration OMG - USB - SER - 4 Page 5 Switch Descriptions Figure 1 : Switches SW2 and SW4 L 485 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.
Con figuration OMG - USB - SER - 4 Page 6 Switch Examples Figure 2 : RS422/485 Interface Configuration 485 Mode Selection OFF : 422 Mode The transmitter lines TX+ and TX - are always driven ON : 485 M.
Con figuration OMG - USB - SER - 4 Page 7 Switch Examples Continue d Port 4 Port 3 Port 2 Port 1 Figure 3 : Electrical Interface Configuration Port 1 : RS - 232 The corresponding shunt is in the 232 position. Th e switches will have no effect. Port 2 : RS - 485 two wire communication with no echo.
Technical OMG - USB - SER - 4 Page 8 Technical Description The OMG - USB - SER - 4 utilizes four USB UARTs. These chips feature programmable baud rate, data format, 12 8 byte Dual Port TX Buffer, and 384 byte Dual Port RX Buffer. The RS - 232/422/485 transceiver supports data rates up to 921.
Specifications OMG - USB - SER - 4 Page 9 Specifications Environmental Specifications Specification Operating Storage Temperature 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 - 4 Page 10 Appendix A - Troubleshooting Serial Utility test 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 – How To Get Assistance OMG - USB - SER - 4 Page 11 Appendix B - How To Get Assistanc e Please refer to Appendix A - Troubleshooting prior to calling Technical Support. 1. Read this manual thoroughly before attempting to install the adapter in your system.
Appendix C - Electrical Interface OMG - USB - SER - 4 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 - 4 Page 13 RS - 485 RS - 485 is backwardly compatible with RS - 422; however, it is optimized for part yline or multi - drop applications. The output of the RS - 422/485 driver is capable of being Active (enabled) or Tri - State (disabled).
Appendix D - Asynchronous Communications OMG - USB - SER - 4 Page 14 Appendix D - Asynchrono us Communications Serial data communications implies that individual bits of a character are transmitted consecutively to a receiver that assembles the bits back into a character.
Appendix E - Compliance Notices OMG - USB - SER - 4 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 - 4 Page 16 EMC Directive Statement Products bearing the CE Label fulfill the requirements of the EMC directive (89/336/EEC) an d 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 ARRAN TY adds an additional one (1) month grace period to the normal one (1) year pr oduct warranty to cover handling and shipping time.
M 3 900 /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,.
An important point after buying a device Omega Four Port RS-232/422/485 to USB Adaptor (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 Four Port RS-232/422/485 to USB Adaptor 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 Four Port RS-232/422/485 to USB Adaptor - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Omega Four Port RS-232/422/485 to USB Adaptor you will learn all the available features of the product, as well as information on its operation. The information that you get Omega Four Port RS-232/422/485 to USB Adaptor will certainly help you make a decision on the purchase.
If you already are a holder of Omega Four Port RS-232/422/485 to USB Adaptor, 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 Four Port RS-232/422/485 to USB Adaptor.
However, one of the most important roles played by the user manual is to help in solving problems with Omega Four Port RS-232/422/485 to USB Adaptor. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Omega Four Port RS-232/422/485 to USB Adaptor 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
