Instruction/ maintenance manual of the product ISA RS-422 Omega Vehicle Security
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www .omega.com e-mail: info@omega.com U ser ’ s Guide OMG-UL TRA-SIO Dual Por t Isolated/Non-Isolated ISA RS-422/485 Adaptor Board Shop online at.
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Contents I NTRODUCTION ..........................................................................1 O VERVIEW ................................................................................................ 1 W HAT ’ S I NCLUDED .....................
W HAT IS G ROUND L OOP ? ................................................................... 16 C ABLING R ECOMM ENDATIONS .......................................................... 16 A PPENDIX E - A SYNCHRONOUS C OMMUNICATIONS ................17 A PPENDIX F - S ILK - S CREEN .
Introduction OMG - ULTRA - SIO Page 1 Introduction Overview The OMG - ULTRA - SIO provides the PC with two additional ground isolated RS - 422/485 (P/N 3189) or two non - isolated RS - 422/485 (P/N 3089) serial ports for terminals, modems, printers, etc.
Card Setup OMG - ULTRA - SIO Page 2 Card Setup The OMG - ULTRA - SIO contains several jumper straps that must be set for proper operation. Address Selection Each port on the OMG - ULTRA - SIO occupies eight consecutive I/O locations. A DIP - switch is used to set the base addres s for these locations.
Card Setup OMG - ULTRA - SIO Page 3 IRQ Selection Headers E11 and E12 select the interrupt request for each seria l port. If COM1: is selected, the corresponding jumper must be on the IRQ4 setting. If COM2: is selected, the corresponding jumper must be on IRQ3.
Card Setup OMG - ULTRA - SIO Page 4 Interrupt Modes Header E5 and E6 se lects the interrupt mode for each port. Each port must be set in the correct mode to insure proper operation.
Card Setup OMG - ULTRA - SIO Page 5 Set the jumper to ‘ S ’ if you are using more than one OMG - ULTRA - SIO in a bus or to completely r emove the pull - down resistor for hardware compatibility. Setting the adapter in this configuration when it is not accompanied by a pull - down resistor will prevent the ports from triggering an interrupt .
Card Setup OMG - ULTRA - SIO Page 6 Headers E8 (Port 1) and E10 (Port 2) are used to control the RS - 485 mode functions for the driver circuit. The two selections are ‘RTS’ enable or ‘Auto’ enable. The ‘Auto’ enable feature automatica lly enables/disables the RS - 485 interface.
Card Setup OMG - ULTRA - SIO Page 7 Interface Mode Examples RTS Auto E8 & E10 E3 & E9 Figure 6 - RS - 422 RTS Auto E8 & E10 E3 & E9 Figure 7 - RS - 485 ‘Auto’ Enabled, with ‘No E.
Card Setup OMG - ULTRA - SIO Page 8 Line Termination Typically, each end of the RS - 485 bus must have line terminating resistor s (RS - 422 terminates at the receive end only). A 120 ohm resistor is across each RS - 530/422/485 input in addition to a 1K ohm pull - up/pull - down combination that bias the receiver inputs.
Installation OMG - ULTRA - SIO Page 9 Installation System Installation The OMG - ULTRA - SIO can be installed in any of the PC expansion slots. The OMG - ULTRA - SIO contains several jumper straps for each port which must be set for proper operation. 1.
Technical Description OMG - ULTRA - SIO Page 10 Technical Description The OMG - ULTRA - SIO provides the PC with two additional ground isolated RS - 422/485 (P/N 3189) or two non - isolated RS - 422/485 (P/N 3089) serial ports for terminals, modems, printers, etc.
Specifications OMG - ULTRA - SIO Page 11 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 - ULTRA - SIO Page 12 Appendix A - Troubleshooting Serial Utility test software is supplied with the adapter and will be used in the troubleshooting procedures. By using this software and following these simple steps, most common problems can be eliminated without the need to call Technical Support.
Appendix A - Troubleshooting OMG - ULTRA - SIO Page 13 8. The following are known I/O conflicts: • The 278 and 378 settings may conflict with your printer I/O adapter.
Appendix B - How To Get Assistance OMG - ULTRA - SIO Page 14 Appendix B - How To Get Assistance Please refer to Troubleshoot ing Guide prior to calling Technical Support. 1. Begin by reading through the Trouble Shooting Guide in Appendix A. If assistance is still needed please see below.
Appendix C – Electrical Interface OMG - ULTRA - SIO Page 15 Appendix C - Electrical Interface RS - 422 The RS - 422 specific ation defines the electrical characteristics of balanced voltage digital interface circuits. RS - 422 is a differential interface that defines voltage levels and driver/receiver electrical specifications.
Appendix D - Ground Loop Phenomenon OMG - ULTRA - SIO Page 16 Appendix D - Ground Loop Phenomenon What is Ground Loop? Ground loop Phenomenon occurs when two (or more) pieces of equipment are connected together with a common ground and a different ground poten tial exists at each location.
Appendix E - Asynchronous Communications OMG - ULTRA - SIO Page 17 Appendix E - Asynchronous 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 F - Silk - Screen OMG - ULTRA - SIO Page 18 Appendix F - Silk - Screen 4.2" 7.35" 3.9".
Appendix G - Compliance Notices OMG - ULTRA - SIO Page 19 Appendix G - Compliance Notices Federal Communications Commission Statement FCC - This equipment has been tested and found to comply w ith the limits for Class A digital device, pursuant to Part 15 of the FCC Rules.
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 21 9 6 /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 Vehicle Security ISA RS-422 (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 Vehicle Security ISA RS-422 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 Vehicle Security ISA RS-422 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Omega Vehicle Security ISA RS-422 you will learn all the available features of the product, as well as information on its operation. The information that you get Omega Vehicle Security ISA RS-422 will certainly help you make a decision on the purchase.
If you already are a holder of Omega Vehicle Security ISA RS-422, 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 Vehicle Security ISA RS-422.
However, one of the most important roles played by the user manual is to help in solving problems with Omega Vehicle Security ISA RS-422. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Omega Vehicle Security ISA RS-422 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
