OMG-ULTRA-485 operator`s manual
Contents
1. 17 APPENDIX ELECTRICAL INTERFACE 18 APPENDIX D ASYNCHRONOUS COMMUNICATIONS 20 APPENDIX E SILK SCREEN cccssscsscssssccccccssssccccsscsssessees 21 APPENDIX COMPLIANCE 5 22 FEDERAL COMMUNICATIONS COMMISSION STATEMENT 22 EMC DIRECTIVE 5 22 Figures Figure 1 Header El IRQ Selection 3 Figure 2 Header E2 Normal IRQ Mode 4 Figure 3 Header E2 Shared IRQ Mode 4 Figure 4 Header 5 RS 485 Transmit Mode 5 Figure 5 Header RS 485 Receive 6 Figure 6 Dip shunt EA EIA 530 7 Figure 7 Dip shunt E4 SIO 485 Mode 8 Figure 8 SW2 Line 9 Figure 9 Asynchronous Communications Bit Diagram 20 1997b Omega Engineering Incorporated All rights reserved Introduction Introduction Overview The Omega Engineering OMG Ultra 485 provides the PC with an additional RS 422 485 serial port for terminals modems printers etc What s Included The OMG Ultra 485 is s2. Stop Bits Flow Control Advanced Settings for Base 1 0 Port Address Interrupt Request Line IRQ Cancel 10 System Setting Change Your COM Port settings have changed You will need to quit and restart Windows so that the new setting s can take effect Manufacturing e IPC 610 A Class III standards are adhered to with a 0 1 visual A Q L and 100 Functional Testing All Omega Engineering Printed Circuit boards are built to U L 94V0 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 5 VDC 160 mA Mean Time Between Failures MTBF Greater than 150 000 hours Calculated Physical Dimensions Board length 5 0 inches 12 70 cm Board Height including Goldfingers 4 2 inches 10 66 cm Board Height excluding Goldfingers 3 9 inches 9 91 cm state of Odd Even line BR 5 to 8 Data Bit Unused 1 BONNE Mn cis l T U T 1 7 1 l 1 ler P I Joa dll J Ps pat 0 ttt rU 11 15 2 4 Figure 9 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 parity check to guard against data
3. 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 485 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 485 in a RS 485 application with existing i e standard RS 232 software drivers Header 5 is used to control the RS 485 mode functions for the transmitter circuit The selections are RTS enable Auto enable or 422 which means always enabled The Auto enable feature automatically enables disables the RS 485 transmitter circuit The RTS mode uses the RTS modem control signal to enable the RS 485 transmitter circuit and provides backward compatibility with existing software products The 4227 mode allows the port to be used in a point to point RS 422 application where the tri stating of the transmitter circuit is not required E5 AUTO I RTS 1 5 422 uum TX AUTO Driver automatically enab
4. Contents INTRODUCTION adi a E OVERVIEW AEE SE EE 1 WHAT S 1 FACTORY DEFAULT SETTINGS 0 04000 1 CARD SETUP cccccsscccoscsscccctccssccceccaccccccssccobccoascobccdsccobccsescosscees 2 ADDRESS SELECTION 2 IRQ SELECTION a ke 3 INTERRUPT MODES 22 0 00 400 1040 4 0 nnne Pare denos 4 RS 485 ENABLE MODES 8 5 CONNECTOR PIN 5516 58 000100 7 BIA 530 edet tdi 7 SO A u ata ea 8 ISA 9 WINDOWS INCLUDING WFW 3 11 INSTALLATION 10 WINDOWS 95 AND WINDOWS INSTALLATION 12 OMG ULTRA 485 SOFTWARE DRIVERS 12 TECHNICAL 1 1 4 13 FEATURES A Mieres 13 SPECIFICATIONS oscicicssccocecssssbescsscdeoscesccscccesesscecessdssocsscscooce 14 ENVIRONMENTAL 8 14 MANUFACTURING ooccccccncnnnoccccnnnnnnnnnonococonnnnnnnnnnncccnnnnnnnnnnnrccnnnnnns 14 POWER CONSUMPTION 0 0 0000 14 MEAN TIME BETWEEN FAILURES 14 PHYSICAL DIMENSIONS 8 14 APPENDIX TROUBLESHOOTING 15 APPENDIX HOW TO ASSISTANCE
5. 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 per character and stop bits i e 9600 N 8 1 3 9 01022 80575 d C612 4 26 164 4 4 bn 0 J D C2 220 05591 BSN NI 4 2 Appendix Compliance Notices Appendix F 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 Operation of this equipment in a resid
6. e Each COM port in the system should have a unique address Typically COMI addresses are 3F8 2F8 3E8 amp 2E8 Hex Omega Engineering OMG Ultra 485 Page 2 Card Setup IRQ Selection Header El selects the interrupt request for each serial port If is selected the corresponding jumper must be on the IRQ4 setting If is selected the corresponding jumper must be IRQ3 Note Most communications software applications default COM3 to IRQ4 and to IRQ3 This requires the sharing of interrupts between COMI and COM3 and between COM2 and COM4 While this is the default it is not always the preferred setting Check your software configuration instructions to determine the most appropriate IRQ selection 23 4 5 7 1011 12 15 Figure 1 Header El IRQ Selection Any two or more ports can share a common IRQ by placing the jumpers on the same IRQ setting at header El and setting the appropriate selections at E2 Consult your particular software for IRQ selection If no interrupt is desired remove the jumper Omega Engineering OMG Ultra 485 Page 3 Card Setup Interrupt Modes Header E2 selects the interrupt mode for the OMG Ultra 485 N indicates the N ormal single interrupt per port mode S Indicates the S hared interrupt mode which allows more than one port to access a single IRQ Any two or more ports can share a common IRQ by placing the jumpers on the sam
7. e DB 25 connector With the 5 position shunt in the EIA 530 mode the ULTRA 485 complies with the EIA 530 out with the following signals supported E4 Figure 6 Dip shunt E4 EIA 530 Mode Ground 7 TS Data Set Ready Negative 6 Input CD Data Carrier Detect Negative 8 Input Data Terminal Ready Positive A Data Terminal Ready Negative Omega Engineering OMG Ultra 485 Page 7 Card Setup SIO 485 With the 5 position shunt in the SIO 485 mode the OMG Ultra 485 is compatible with the Omega Engineering SIO 485 part 3054 with the following signals supported 4 Figure 7 Dip shunt E4 5910 4685 Mode Name Pin amp Mode Ground Omega Engineering OMG Ultra 485 Page 8 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 100 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 DIP switch SW2 provides the ability to customize this interface to system requirements Each switch position corresponds to a specific portion of the interface If multiple OMG Ultra 485 adapters are configured in a RS 485 network only the boards on each end should have switches T P amp P ON Refer to the following table for each position s operation Adds or removes the 120 ohm terminati
8. e IRQ setting and setting the appropriate selections at El Consult your particular software for IRQ selection If no interrupt is desired remove the jumper indicates the inclusion of a ohm pull down resistor required on one port when sharing interrupts NSM Figure 2 Header E2 Normal IRQ Mode Set the jumper to S if you are using more than one OMG Ultra 485 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 Set the jumpers to S for shared interrupt mode on all blocks sharing an IRQ except one Set that port block for M This provides the pull down resistor circuit that makes sharing IRQs possible If you are using more than one OMG Ultra 485 or a compatible adapter in a bus you should only have one port set to The following example shows two OMG Ultra 485 adapters sharing a single IRQ NSM NSM ez JM E2 Figure 3 Header E2 Shared IRO Mode Omega Engineering OMG Ultra 485 Page 4 Card Setup RS 485 Enable Modes RS 485 is ideal for multi drop or network environments RS 485 requires 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
9. ential 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 e EN55022 Class A Limits and methods of measurement of radio interference characteristics of information technology equipment EN50082 1 Electromagnetic compatibility Generic immunity standard Part Residential commercial and light industry e 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 Omega Engineering OMG Ultra 485 Page 22 Warranty Warranty Omega Engineering Inc warrants this product to be in good working order for a period of one year from the date of purchase Should this product fail to be in good working order at any time during this period Omega Engineer
10. hipped with the following items If any of these items are missing or damaged contact the supplier e OMG Ultra 485 Serial I O Adapter 3 5 Serial Utility Diskette e User Manual Factory Default Settings The OMG Ultra 485 factory default settings are as follows Base Address IRQ Electrical Specification RS 485 Auto To install the OMG Ultra 485 using factory default settings refer to Installation on page 10 For your reference record installed OMG Ultra 485 settings below Base Address IRQ Electrical Specification Omega Engineering OMG Ultra 485 Page 1 Card Setup Card Setup The OMG Ultra 485 contains several jumper straps which must be set for proper operation Address Selection The OMG Ultra 485 occupies 8 consecutive I O locations and looks to the PC as a standard serial port A DIP switch SW1 is used to set the port address options for the OMG Ultra 485 Be careful when selecting the port addresses as some selections may conflict with existing ports The following table shows the addressing options available with the standard PAL If different address options are required please contact Omega Engineering Technical Support about a custom PAL option J2 SW1 1 SW1 2 SW1 3 SW1 4 Disabled On 3F8 Off 2F8 Off On 3E8 Off 2ES On 3220 Off 3228 On 4220 Off 4228 On 238 Off 300 On 308 Off Off Off 280 On 288 Off Off Off 290 Off Off Off On 298 Off Off Off Off Not
11. ing will at it s option replace or repair it at no additional charge except as set forth in the following terms This warranty does not apply to products damaged by misuse modifications accident or disaster Omega Engineering assumes no liability for any damages lost profits lost savings or any other incidental or consequential damage resulting from the use misuse of or inability to use this product Omega Engineering will not be liable for any claim made by any other related party RETURN AUTHORIZATION MUST BE OBTAINED FROM OMEGA ENGINEERING BEFORE RETURNED MERCHANDISE WILL BE ACCEPTED AUTHORIZATION CAN BE OBTAINED BY CALLING OMEGA ENGINEERING AND REQUESTING A RETURN MERCHANDISE AUTHORIZATION RMA NUMBER Omega Engineering Incorporated One Omega Drive PO Box 4047 Stamford CT 06907 800 826 6342 FAX 203 359 7990 www omega com email das omega com Technical Support is available from 8 a m to 5 p m Eastern time Monday Friday Trademarks Omega Engineering Incorporated acknowledges that all trademarks referenced in this manual are the service mark trademark or registered trademark of the respective company OMG Ultra 485 is a trademark of Omega Engineering Incorporated Omega Engineering OMG Ultra 485 Page 23
12. led disabled Driver enabled by UART RTS signal 422 Driver always enabled Note The jumper in the above example is in the 4227 position This is the only setting in which the modem control outputs RTS DTR are valid Omega Engineering OMG Ultra 485 Page 5 Card Setup Figure 4 Header ES RS 485 Transmit Mode Header E3 is used to control the RS 485 enable disable functions for the receiver circuit 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 The selection at E3 should follow the selection made at ES if No Echo is desired If Echo suppression is not desired then leave the jumper in the 422 position Also note the modem control inputs DSR DCD CTS are only valid when Header is in the 422 mode These header blocks are described in the illustration and table that follow E3 AUTO RTS I 71 422 RX AUTO Receiver automatically enabled disabled Receiver enabled by UART RTS signal 422 Receiver always enabled Figure 5 Header E3 RS 485 Receive Mode Omega Engineering OMG Ultra 485 Page 6 Card Setup Connector Pin Assignments EIA 530 DIP shunt E4 selects the pin out for th
13. on RS 422 RS 485 receiver circuit Receive data only RS 422 RS 485 receiver circuit Receive data only TPPLL Figure 8 SW2 Line Termination Omega Engineering OMG Ultra 485 Page 9 Installation Installation The OMG Ultra 485 can be installed in any of the PC expansion slots The OMG Ultra 485 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 485 into the slot Make sure that the adapter is seated properly 5 Replace the screw 6 Replace the cover 7 Connect the power cord Bot Installation is complete Windows 3 x Including WFW 3 11 Installation To configure the OMG Ultra 485 under Windows 3 x start by opening the Control Panel The Control Panel is typically found in the Main Program Group The next step is to open the Ports selection under the Control Panel Control Panel MA 65 Color Fonts Mouse Desktop B e Keyboard Printers International Date Time Network S 8 fig Sound i MIDI Mapper ODBC Enhanced Sound Drivers Fax Specifies communications settings for serial ports Omega Engineering OMG Ultra 485 Page 10 Settings for Baud Rate 19200 Data Bits Cancel Parity Advanced
Download Pdf Manuals
Related Search