Omega Vehicle Security ISA RS-422 User's Manual
Contents
1. 422 RTS O O m Auto 8 amp E10 E3 amp E9 Figure 7 RS 485 Auto Enabled with No Echo RIS O O mm Auto oo E8 amp E10 E3 amp E9 Figure 8 RS 485 Auto Enabled with Echo RTS i m Auto O O L1 E8 amp E10 E3 amp E9 Figure 9 RS 485 RTS Enabled with No Echo OMG ULTRA SIO Page 7 Card Setup Line Termination Typically each end of the RS 485 bus must have line terminating resistors 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 Headers E1 and E4 allow the user to customize this interface to their specific requirements Each jumper position corresponds to a specific portion of the interface If multiple OMG ULTRA SIO adapters are configured in a RS 485 network only the boards on each end should have jumpers T P amp P ON Refer to the following table for each position s operation Name Function Connects the TX to RX for RS 485 two wire operation Adds or removes the 120 ohm termination Connects the TX to RX for RS 485 two wire operation RS 422 RS 485 receiver circuit Receive data only 485 receiver circuit Receive data only oo mE oo a m T m e Figure 10 Headers El and E4 Line Termination OMG ULTRA SIO Page 8 Installati2. DOS and will verify if an adapter is configured properly This diagnostic program is written with the user in mind and is easy to use Refer to the DIAG txt file in the dos diag directory for detailed instructions on using SSD For Windows 95 98 and Windows NT the diagnostic tool WinSSD is installed in the Omega Engineering folder on the Start Menu during the setup process First find the ports using the Device Manager then use WinSSD to verify that the ports are functional Always use the diagnostic software when troubleshooting a problem This will help eliminate any software issues and identify any hardware conflicts OMG ULTRA SIO Page 12 Appendix A Troubleshooting 8 following are known conflicts The 278 and 378 settings may conflict with your printer I O adapter cannot be used if a Monochrome adapter is installed 3F8 3FF is typically reserved for COMI 2F8 2FF is typically reserved for COM2 3E8 3EF is typically reserved for COM3 2E8 2EF is typically reserved for COM4 OMG ULTRA SIO Page 13 Appendix B How To Get Assistance Appendix B How To Get Assistance Please refer to Troubleshooting 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 2 When calling for technical assistance please have your user manual and current adapter settings If possible please have the a
3. IRQs with another adapter 5 Fig re 6 422 Figure 7 RS 485 Auto Enabled with No Echo Figure 8 RS 485 Auto Enabled with Echo Figure 9 RS 485 RTS Enabled with No Echo cas Figure 10 Headers E1 and EA Line Termination Figure 11 OMG ULTRA SIO cabling Figure 12 Asynchronous Communications Bit Diagram 17 Introduction 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 Isolation is important in installations where the equipment being connected to the PC is either far from the PC or on a different power transformer circuit Ground loop current is a commonly neglected and misunderstood phenomenon that leads to data loss and the possible destruction of communications interfaces The isolated OMG ULTRA SIO provides up to 500 volts DC of isolation What s Included The OMG ULTRA SIO is shipped with the following items If any of these items are missing or damaged contact the supplier e OMG ULTRA SIO Serial I O Adapter P N 3189 with isolation or P N 3089 without isolation e Software Factory Default Settings The OMG ULTRA SIO factory default settings as follows Base Addr
4. OBTAIN AN AUTHORIZED RETURN AR NUMBER FROM OMEGA S CUSTOMER SERVICE DEPARTMENT IN ORDER TO AVOID PROCESSING DELAY S The assigned AR number should then be marked on the outside of the return package and on any correspondence The purchaser is responsible for shipping charges freight insurance and proper packaging to prevent breakage in transit FOR WARRANTY RETURNS please have the FOR NON WARRANTY REPAIRS consult OM EGA following information available BEFORE for current repair charges Have the following contacting OMEGA information available BEFORE contacting OMEGA 1 Purchase Order number under which the product 1 Purchase Order number to cover the COST was PURCHASED of the repair 2 Model and serial number of the product under 2 Model and serial number of the product and warranty and 3 Repair instructions and or specific problems 3 Repair instructions and or specific problems relative to the product relative to the product OMEGA s policy is to make running changes not model changes whenever an improvement is possible This affords our customers the latest in technology and engineering OMEGA is a registered trademark of OMEGA ENGINEERING INC Copyright 2002 OMEGA ENGINEERING INC All rights reserved This document may not be copied photocopied reproduced translated or reduced to any electronic medium or machine readable form in whole or in part without the prior written consent of OMEGA ENGINEERING INC
5. OMG ULTRA SIO utilizes the 16550 UART This chip features programmable baud rate data format interrupt control and a 16 byte input and output FIFO A full array of UART upgrades is also available offering larger FIFO s Contact technical support for details Features e Automatic RS 485 driver enable disable allows card to appear to be RS 232 requiring no additional drivers e PAL option allows for unique OEM address selection e Shareable IRQs allow more than one port to share a single IRQ providing polling type driver is used e IRQs 2 9 7 10 11 12 14 15 supported e 16550 buffered UARTS Standard e 16 Bit address decode allows for easier integration Connector Pin Assignments DB 9 MALE Signal Name Mode TX 4 Output TX Output RTS Output RTS Output Input Input CTS Clear To Send Positive 9 Input CTS Clear To Send Negative 8 OMG ULTRA SIO Page 10 Specifications Specifications Environmental Specifications Specification Operating Temperature Range 0 to 50 C 20 to 70 C 32 to 122 F 4 to 158 F Humidity Range 10 to 90 10 to 90 R H Non Condensing Non Condensing Manufacturing e All Printed Circuit boards are built to U L 94VO rating and are 100 electrically tested These printed circuit boards are solder mask over bare copper or solder mask over tin nickel Power Consumption Supply line Mean Time Between Fai
6. Shop online at www omega com e mail info omega com OMG ULTRA SIO Dual Port Isolated Non Isolated ISA RS 422 485 Adaptor Board OMEGAnet Online Service Internet e mail www omega com info omega com USA ISO 9001 Certified Canada Servicing North America One Omega Drive P O Box 4047 Stamford CT 06907 0047 TEL 203 359 1660 FAX 203 359 7700 e mail info omega com 976 Bergar Laval Quebec H7L 5A1 Canada TEL 514 856 6928 FAX 514 856 6886 e mail info omega ca For immediate technical or application assistance USA and Canada Mexico Benelux Czech Republic France Germany Austria United Kingdom ISO 9002 Certified Sales Service 1 800 826 6342 1 800 TC OMEGA Customer Service 1 800 622 2378 1 800 622 BEST Engineering Service 1 800 872 9436 1 800 USA WHEN TELEX 996404 EASYLINK 62968934 CABLE OMEGA En Espa ol 001 203 359 7803 e mail espanol omega com FAX 001 203 359 7807 info omega com mx Servicing Europe Postbus 8034 1180 LA Amstelveen The Netherlands TEL 31 0 20 3472121 FAX 31 0 20 6434643 Toll Free in Benelux 0800 0993344 e mail sales amp omegaeng nl Frystatska 184 733 01 Karvin Czech Republic TEL 420 0 59 6311899 FAX 420 0 59 6311114 Toll Free 0800 1 66342 e mail info omegashop cz 11 rue Jacques Cartier 78280 Guyancourt France TEL 33 0 1 61 37 29 00 FAX 33 0 1 30 57 54 27 Toll Free in Fr
7. Where Do Find Everything Need for Process Measurement and Control OMEGA Of Course Shop online at www omega com TEMPERATURE Thermocouple RTD amp Thermistor Probes Connectors Panels amp Assemblies Wire Thermocouple RTD amp Thermistor Calibrators amp Ice Point References A Recorders Controllers amp Process Monitors A Infrared Pyrometers PRESSURE STRAIN AND FORCE Transducers amp Strain Gages Load Cells amp Pressure Gages Displacement Transducers A Instrumentation amp Accessories FLOW LEVEL Rotameters Gas Mass Flowmeters amp Flow Computers A Air Velocity Indicators A Turbine Paddlewheel Systems A Totalizers amp Batch Controllers pH CONDUCTIVITY A pH Electrodes Testers amp Accessories A Benchtop Laboratory Meters Controllers Calibrators Simulators amp Pumps 4 Industrial pH amp Conductivity Equipment DATA ACQUISITION A Data Acquisition Engineering Software 4 Communications Based Acquisition Systems 4 Plug in Cards for Apple amp Compatibles Datalogging Systems A Recorders Printers amp Plotters HEATERS 4 Heating Cable A Cartridge amp Strip Heaters Immersion amp Band Heaters Flexible Heaters 4 Laboratory Heaters ENVIRONMENTAL MONITORING AND CONTROL Metering amp Control Instrumentation 4 Refractometers Pumps amp Tubing A Air Soil amp Water Monitors A Indust
8. YSTEM INSTALLATION a anerer e OPERATING SYSTEM INSTALLATION For Windows 75 TAAA Other Operating Systems 2 BEATURES 4 RR ERRORES 10 CONNECTOR PIN ASSIGNMENTS DB 9 MALE eee 10 ENVIRONMENTAL SPECIFICATIONS eese 11 MANUFACTURING eterne th eee a a cora ERE Rus 11 POWER CONSUMPTION eerte eene tentent tenente nenne nennen nnns 11 MEAN TIME BETWEEN FAILURES MTBP 11 PHYSICAL DINI EAN LO A e 11 APPENDIX TROUBLESHOOTING L2 APPENDIX B HOW TO GET ASSISTANCEERROR BOOKMARK NOT DEFINED APPENDIX C ELECTRICAL INTERFACE 15 APPENDIX D GROUND LOOP PHENOMENON 1 6 WHAT IS GROUND LOOP E 16 CABLING RECOMMENDATIONSS eese tenerent entres 16 APPENDIX E ASYNCHRONOUS 17 APPENDIX F SILK SCREEN ee ee ee eese eese eese esee LS APPENDIX G COMPLIANCE NOTICES 19 FEDERAL COMMUNICATIONS COMMISSION STATEMENT 19 EMC DIRECTIVE STATEMENT 19 Figures Figure 1 Address Selection Table Figure 2 Header E11 and E12 IRQ Selection Figure 3 Header E5 amp E6 Normal IRQ Mode Figure 4 Header E5 amp E6 Shared IRQ Mode eere Figure 5 Header E5 amp E6 Sharing
9. ach serial port If COMI is selected the corresponding jumper must be on the IRQ4 setting If 2 is selected the corresponding jumper must be on IRQ3 Note Most communications software applications default COM3 to IRQ4 and to IRQ3 This requires the sharing of interrupts between COMI COM3 and between COM2 and COMA While this is the default it is not always the preferred setting Check your software configuration instructions to determine the most appropriate IRQ selection ee e eu oU Vw Vf onn gt Figure 2 Header E11 E12 IRQ Selection Any two or more ports can share a common IRQ by placing the jumpers on the same IRQ setting at header E11 and E12 and setting the appropriate selections at ES and E6 Note that a polling type driver is needed to share interrupts in this fashion Windows does not supply a polling type driver Consult your particular software for IRQ selection If no interrupt is desired remove the jumper OMG ULTRA SIO Page 3 Card Setup Interrupt Modes Header E5 and E6 selects the interrupt mode for each port Each port must be set in the correct mode to insure proper operation N indicates the N ormal single interrupt per port mode S Indicates the S hared interrupt mode which allows more than o
10. ance 0800 466 342 e mail sales omega fr Daimlerstrasse 26 D 75392 Deckenpfronn Germany TEL 49 0 7056 9398 0 FAX 49 0 7056 9398 29 Toll Free in Germany 0800 639 7678 e mail info omega de One Omega Drive River Bend Technology Centre Northbank Irlam Manchester M44 5BD United Kingdom TEL 44 0 161 777 6611 FAX 44 0 161 777 6622 Toll Free in United Kingdom 0800 488 488 e mail sales omega co uk It is the policy of OMEGA to comply with all worldwide safety and EMC EMI regulations that apply OMEGA is constantly pursuing certification of its products to the European New Approach Directives OMEGA will add the CE mark to every appropriate device upon certification The information contained in this document is believed to be correct but OMEGA Engineering Inc accepts no liability for any errors it contains and reserves the right to alter specifications without notice WARNING These products are not designed for use in and should not be used for patient connected applications Contents OVBRVIBW ince onto E HO cota ates RR E 1 WHAT S INCLUDED FACTORY DEFAULT SETTINGS ADDRESS SELECTION nonne ei ia 2 PORT ENABLE 2 2 24 0 0 00 0 0 00100001 605086 00000 2 TRO SELECTION i ete aee INTERRUPT MODES DM Ses RS 485 ENABLE MODES sesenta INTERFACE MODE EXAMPLES LINE TERMINATION erret eet eae teet eripe 8 S
11. arity check to guard against data corruption Common methods are called E ven Parity or O dd Parity Sometimes parity is not used to detect errors on the data stream This is refereed to as N o parity Because each bit in asynchronous communications is sent consecutively it is easy to generalize asynchronous communications by stating that each character is wrapped framed by pre defined bits to mark the beginning and end of the serial transmission of the character The data rate and communication parameters for asynchronous communications have to be the same at both the transmitting and receiving ends The communication parameters are baud rate parity number of data bits character stop bits 9600 8 1 OMG ULTRA SIO Page 17 Appendix F Silk Screen Appendix F Silk Screen 7 35 OMG ULTRA SIO Page 18 Appendix G Compliance Notices Appendix G Compliance Notices Federal Communications Commission Statement FCC This equipment has been tested and found to comply with the limits for Class A digital device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause harmful interference to radio communications Opera
12. dapter installed in a computer ready to run diagnostics 3 Omega Engineering maintains a Home page on the Internet Our home page address is www omega com The latest software updates and newest manuals are available via our FTP site that can be accessed from our home page 4 Technical support is available Monday to Friday from 8 30 a m to 6 00 p m eastern time Technical support can be reached at 1 800 DAS IEEE RETURN AUTHORIZATION MUST BE OBTAINED FROM OMEGA ENGINEERING BEFORE RETURNED MERCHANDISE WILL BE ACCEPTED AUTHORIZATION CAN BE OBTAINED BY CALLING OMEGA CUSTOMER SERVICE AND REQUESTING AN AUTHORIZED RETURN AR NUMBER OMG ULTRA SIO Page 14 Appendix C Electrical Interface Appendix C Electrical Interface RS 422 The RS 422 specification 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 On a differential interface logic levels are defined by the difference in voltage between a pair of outputs or inputs In contrast a single ended interface for example RS 232 defines the logic levels as the difference in voltage between a single signal and a common ground connection Differential interfaces are typically more immune to noise or voltage spikes that may occur on the communication lines Differential interfaces also have greater drive capabilities that allow for longer cable
13. ess IRQ Electrical Specification RS 422 RS 422 To install the OMG ULTRA SIO using factory default settings refer to Installation on page 9 For your reference record installed OMG ULTRA SIO settings below Base Address IRQ Electrical Specification OMG ULTRA SIO Page 1 Card Setup 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 address for these locations SW1 sets the I O address for port 1 and SW2 sets port 2 The following table shows the addressing options available If different address options are required please contact Technical Support about a custom PAL option 2 el Figure 1 Address Selection Table Note Each COM port in the system should have a unique address Typically COMI addresses 3F8 2F8 3E8 and 2E8 Hex Refer to Appendix A for common address contentions Port Enable Disable Each port on the OMG ULTRA SIO can be enabled or disabled with switch position 4 on the DIP switch The port is enabled with the switch On and disabled when Off If any port is disabled be sure to disable the interrupt request for that port by removing the IRQ jumper OMG ULTRA SIO Page 2 Card Setup IRQ Selection Headers E11 and E12 select the interrupt request for e
14. lengths RS 422 is rated up to 10 Megabits per second and can have cabling 4000 feet long RS 422 also defines driver and receiver electrical characteristics that will allow 1 driver and up to 32 receivers on the line at once RS 422 signal levels range from 0 to 5 volts RS 422 does not define a physical connector 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 or Tri State disabled This capability allows multiple ports to be connected in a multi drop bus and selectively polled RS 485 allows cable lengths up to 4000 feet and data rates up to 10 Megabits per second The signal levels for RS 485 are the same as those defined by RS 422 RS 485 has electrical characteristics that allow for 32 drivers and 32 receivers to be connected to one line This interface is ideal for multidrop or network environments RS 485 tri state driver not dual state will allow the electrical presence of the driver to be removed from the line Only one driver may be active at a time and the other driver s must be tri stated RS 485 can be cabled in two ways two wire and four wire mode Two wire mode does not allow for full duplex communication and requires that data be transferred in only one direction at a time For half duplex operation the two transmit pins should be connected to the two receive pins Tx4 to Rx and Tx t
15. lures MTBF Greater than 150 000 hours Calculated Physical Dimensions Board length 7 35 inches 18 67 cm Board Height including Goldfingers 4 2 inches 10 66 cm Board Height excluding Goldfingers 3 9 inches 9 91 cm OMG ULTRA SIO Page 11 Appendix A Troubleshooting 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 1 Identify all I O adapters currently installed in your system This includes your on board serial ports controller cards sound cards etc The I O addresses used by these adapters as well as the IRQ if any should be identified Configure your adapter so that there is no conflict with currently installed adapters No two adapters can occupy the same I O address Make sure the adapter is using a unique IRQ The IRQ is typically selected via an on board header block Refer to the section on Card Setup for help in choosing an I O address and IRQ Make sure the adapter is securely installed in a motherboard slot When running DOS Windows 3 x or other operating systems refer to the Serial Utilities software for that operating system and the User Manual to verify that the adapter is configured correctly The supplied software contains a diagnostic program SSD that runs under
16. ne port to access a single IRQ Any two or more ports can share a common IRQ by placing the jumpers on the same IRQ setting and setting the appropriate selections at El Consult your particular software for IRQ selection If no interrupt is desired remove the jumper M indicates the inclusion of a ohm pull down resistor required on one port when sharing interrupts N SM O s Figure 3 Header E5 amp E6 Normal IRQ Mode Set the jumpers to S for shared interrupt mode on all blocks sharing an IRQ except one Set that port block for This provides the pull down resistor circuit that makes sharing IRQs possible If you are using more than one OMG ULTRA SIO or a compatible adapter in a bus you should only have one port set to M The following example shows both ports sharing a single IRQ NSM 20 Figure 4 Header E5 amp E6 Shared IRQ Mode OMG ULTRA SIO Page 4 Card Setup Set the jumper to S if you are using more than one OMG ULTRA SIO in a bus or to completely remove 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 NSM 1O 2c Figure 5 Header 5 amp E6 Sharing IRQs with another adapter RS 485 Enable Modes RS 485 is ideal for multi drop or network environments RS 485 req
17. nnector place a jumper over the RTS pins at E8 and E10 Otherwise the RTS control signal will not be present at the DB connector Headers E3 Port 1 and E9 Port 2 are used to control the RS 485 enable disable functions for the receiver circuit and determine the state of the RS 422 485 driver The RS 485 Echo is the result of connecting the receiver inputs to the transmitter outputs Every time a character is transmitted it is also received This can be beneficial if the software can handle echoing i e using received characters to throttle the transmitter or it can confuse the system if the software does not These header blocks are described in the illustration and table that follow 422 485 E3 Port 1 E9 Port 2 Position 1 Echo Echoes the data that is transmitted characters transmitted received Only relevant in the two wire RS 485 Mode Position 2 No Echo Inhibits the data that has been transmitted Receiver is off when transmitter is on Only relevant in the two wire RS 485 Mode Position 3 422 RS 422 485 Driver always enabled RS 422 Mode RTS modem control signal available on DB 9 connector Position 4 485 RS 422 485 Driver enabled by RTS or Auto enabled Modem control signal not available on DB 9 connector OMG ULTRA SIO Page 6 Card Setup Interface Mode Examples Auto E8 amp E10 E3 amp E9 Figure 6 RS
18. o Rx Four wire mode allows full duplex data transfers RS 485 does not define a connector pin out or a set of modem control signals RS 485 does not define a physical connector OMG ULTRA SIO Page 15 Appendix D Ground Loop Phenomenon 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 potential exists at each location This current can cause the connected equipment to experience noise that in turn causes data transmission errors In the extreme this ground current can cause equipment malfunction or even destruction Cabling Recommendations When connecting the OMG ULTRA SIO in a RS 485 network care should be taken that both ends of the network are not isolated from ground see Figure 12 This floating ground condition could cause the capacitive or inductive coupling of voltages that will cause a break down in the DC to DC converter circuit or in the opto isolator circuit This condition will cause data errors and possibly destruction of the receiver circuit A B Non Isolated Isolated Ground Ultra SIO Ultra SIO Isolation Figure 11 OMG ULTRA SIO cabling example OMG ULTRA SIO Page 16 Appendix E Asynchronous Communications Appendix E Asynchronous Communications Serial data communications implies that individual bits of a characte
19. on 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 Turn off PC power Disconnect the power cord Remove the PC case cover Locate an available slot and remove the blank metal slot cover Gently insert the OMG ULTRA SIO into the slot Make sure that the adapter is seated properly 5 Replace the screw 6 Replace the cover 7 Connect the power cord Installation is complete Operating System Installation For Windows Users Start by choosing Install Software at the beginning of the CD Choose Asynchronous COM Port Software SeaCOM Other Operating Systems Refer to the appropriate section of the Serial Utilities Software OMG ULTRA SIO Page 9 Technical Description 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 Isolation is important in installations where the equipment being connected to the PC is either far from the PC or on a different power transformer circuit Ground loop current is a commonly neglected and misunderstood phenomena that leads to data loss and the destruction d communications interfaces The OMG ULTRA SIO isolated boards provide up to 500 volts DC of isolation The
20. r are transmitted consecutively to a receiver that assembles the bits back into a character Data rate error checking handshaking and character framing start stop bits are pre defined and must correspond at both the transmitting and receiving ends Asynchronous communications is the standard means of serial data communication for PC compatibles and PS 2 computers The original PC was equipped with a communication or COM port that was designed around an 8250 Universal Asynchronous Receiver Transmitter UART This device allows asynchronous serial data to be transferred through a simple and straightforward programming interface Character boundaries for asynchronous communications are defined by a starting bit followed by a pre defined number of data bits 5 6 7 or 8 The end of the character is defined by the transmission of a pre defined number of stop bits usually 1 1 5 or 2 An extra bit used for error detection is often appended before the stop bits Idle state of Odd Even line te M 5 to 8 Data Bits ei i ond iR ERR 1 a aa ee rp l 1 Vor ISP 0 rem 2 Figure 12 Asynchronous Communications Bit Diagram This special bit is called the parity bit Parity is a simple method of determining if a data bit has been lost or corrupted during transmission There are several methods for implementing a p
21. rial Water amp Wastewater Treatment pH Conductivity Dissolved Oxygen Instruments M2196 0303
22. tion of this equipment in a residential area is likely to cause harmful interference in such case the user will be required to correct the interference at his own expense 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 To obey these directives the following European standards must be met EN55022 Class A Limits and methods of measurement of radio interference characteristics of information technology equipment ENS5024 Information technology equipment Immunity characteristics Limits and methods of measurement EN60950 IEC950 Safety of information technology equipment including electrical business equipment Warning This is a Class A Product In a domestic environment this product may cause radio interference in which case the user may be required to take adequate measures Always use cabling provided with this product if possible If no cable is provided or if an alternate cable is required use high quality shielded cabling to maintain compliance with FCC EMC directives OMG ULTRA SIO Page 19 Si WARRANTY DISCLAIMER OMEGA ENGINEERING INC warrants this unit to be free of defects in materials and workmanship for a period of 13 months from date of purchase OM EGA s WARRANTY adds an additional 1 month grace period to the normal one 1 year prod
23. ts OMEGA MAKES NO OTHER WARRANTIES OR REPRESENTATIONS OF ANY KIND WHATSOEVER EXPRESS OR IMPLIED EXCEPT THAT OF TITLE AND ALL IMPLIED WARRANTIES INCLUDING ANY WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED LIMITATION OF LIABILITY The remedies of purchaser set forth herein are exclusive and the total liability of OMEGA with respect to this order whether based on contract warranty negligence indemnification strict liability or otherwise shall not exceed the purchase price of the component upon which liability is based In no event shall OMEGA be liable for consequential incidental or special damages CONDITIONS Equipment sold by OMEGA is not intended to be used nor shall it be used 1 as a Basic Component under 10 CFR 21 NRC used in or with any nuclear installation or activity or 2 in medical applications or used on humans Should any Product s be used in or with any nuclear installation or activity medical application used on humans or misused in any way OM EGA assumes no responsibility as set forth in our basic WARRANTY DISCLAIM ER language and additionally purchaser will indemnify OMEGA and hold OMEGA harmless from any liability or damage whatsoever arising out of the use of the Product s in such a manner RETURN REQUESTS INQUIRIES Direct all warranty and repair requests inquiries to the OMEGA Customer Service Department BEFORE RETURNING ANY PRODUCT S TO OMEGA PURCHASER MUST
24. uct warranty to cover handling and shipping time This ensures that OM EGA Ss customers receive maximum coverage on each product If the unit malfunctions it must be returned to the factory for evaluation OMEGA s Customer Service Department will issue an Authorized Return AR number immediately upon phone or written request Upon examination by OMEGA if the unit is found to be defective it will be repaired or replaced at no charge OM EGA s WARRANTY does not apply to defects resulting from any action of the purchaser includ ing but not limited to mishandling improper interfacing operation outside of design limits improper repair or unauthorized modification This WARRANTY is VOID if the unit shows evidence of having been tampered with or shows evidence of having been damaged as a result of excessive corrosion or current heat moisture or vibration improper specification misapplication misuse or other operating conditions outside of OM EGA s control Components which wear are not warranted including but not limited to contact points fuses and triacs OMEGA is pleased to offer suggestions on the use of its various products However OMEGA neither assumes responsibility for any omissions or errors nor assumes liability for any damages that result from the use of its products in accordance with information provided by OMEGA either verbal or written OMEGA warrants only that the parts manufactured by it will be as specified and free of defec
25. uires a tri state driver not dual state that will allow the electrical presence of the driver to be removed from the line The driver is in a tri state or high impedance condition when this occurs Only one driver may be active at a time and the other driver s must be tri stated The output modem control signal Request To Send RTS is typically used to control the state of the driver Some communication software packages refer to RS 485 as RTS enable or RTS block mode transfer One of the unique features of the OMG ULTRA SIO is the ability to be RS 485 compatible without the need for special software or drivers This ability is especially useful in Windows Windows NT and OS 2 environments where the lower level I O control is abstracted from the application program This ability means that the user can effectively use the OMG ULTRA SIO in a RS 485 application with existing i e standard RS 232 software drivers OMG ULTRA SIO Page 5 Card Setup 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 automatically enables disables the RS 485 interface The RTS mode uses the RTS modem control signal to enable the RS 485 interface and provides backward compatibility with existing software products If you have E3 and E9 in the RS 422 mode and wish to have the RTS signal present at the DB co
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