OMG-SIO-530 operator`s manual
Contents
1. 13 PHYSICAL DIMENSIONS ees sesse ese ee ese ee ee ee ee ee Re ee ee ee 13 APPENDIX A TROUBLESHOOTING scccccssssssscccsssssvecssees 14 APPENDIX B HOW TO GET ASSISTANCE ccccccscccccseoeeee 16 APPENDIX C ELECTRICAL INTERFACE cccccscsccccssscceee 17 AE aii ibn jek ed en belies Nitto elas tes 17 RS 422 ic OE OE TE N N 17 LE EE 18 RS OI EA E A ee SIJ Ge ee 18 APPENDIX D ASYNCHRONOUS COMMUNICATIONS 20 APPENDIX E SILK SCREEN cccssscsccsssscscccssscscccssscsssessees 21 APPENDIX E SCHEMATIC ccccccssssssccccsscsccccsscscccsssssesesses AA APPENDIX G COMPLIANCE NOTICES cccssssccssssssvcessees 23 COMPLIANCE NOTICES ERROR BOOKMARK NOT DEFINED FEDERAL COMMUNICATIONS COMMISSION STATEMENT 23 EMC DIRECTIVE STATEMENT ees sesse ese see ee ee ee ee ee ee ee ee ee ee ee ee ee 23 WARRANTY sedes oe e e ok deed sesde e Geo sd oe See sd eed ee dd ees ee es des doo des 24 Figures Figure 1 Address Selection Table sssccsssscsssssscsssecsssessssessseees 2 Figure 2 DIP Switch Illustration see esse sesse esse sesse ee ee Ge Ge Ge Gee 2 Figure 3 Header E2 and E3 IRQ Selection sssees see ese esse see Es 3 Figure 4 Header E2 options eeereenoooonoooooonnooonoooonaseneoenase enne 4 Figure 5 Header E1 RS 232 Interface Selected 5 Figure 6 Header E1 RS 530 422 Inter2. 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 SIO 530 is a trademark of Omega Engineering Incorporated Omega Engineering OMG SIO 530 Page 24
3. 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 SIO 530 Page 23 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 Engineering 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 PO Box 4047 One Omega Drive Stamford CT 06907 800 826 6342 FAX 203 359 7990 email Internet das omega com WWW Site www omega com Technical Support is available from 8 30 a m to 6 p m Eastern time
4. 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 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 Omega Engineering OMG SIO 530 Page 17 Appendix C Electrical Interface RS 530 RS 530 a k a E1A 530 compatibility means that RS 422 signal levels are met and the pin out for the DB 25 connector is specified The EIA Electronic Industry Association created the RS 530 specification to detail the pin out and define a full set of modem control signals that can be used for regulating flow control and line status The RS 530 specification defines two types of interface circuits Data Terminal Equipment DTE and Data Circuit Terminating Equipment DCE The Omega Engineering adapter is a DTE interface 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 cabl
5. occupy the same I O address Make sure the Omega Engineering adapter is using a unique IRQ While the Omega Engineering adapter does allow the sharing of IRQ s many other adapters i e SCSI adapters amp on board serial ports do not 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 Omega Engineering adapter is securely installed in a motherboard slot Use the supplied diskette and User Manual to verify that the Omega Engineering adapter is configured correctly The supplied diskette contains a diagnostic program SSD that 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 README file on the supplied diskette for detailed instructions on using SSD Omega Engineering OMG SIO 530 Page 14 Appendix A Troubleshooting 6 The following are known I O conflicts e The 278 and 378 settings may conflict with your printer I O adapter 3B0 cannot be used if a Monochrome adapter is installed 3F8 3FF is typically reserved for COM 2F8 2FF is typically reserved for COM2 3E8 3EF is typically reserved for COM3 2E8 2EF is typically reserved for COM4 7 Please refer to your included diskette for any post production manual updates and application specific information 8 Always use the Omega Engineering diagnostic software wh
6. 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 Omega Engineering OMG SIO 530 Page 20 Appendix E Silk Screen Appendix E Silk Screen 4 2 4 9 gt Ty TEH A a lt He s 2 SE DYI E ZEVSINN N A 3 SpZSTEL 8 Z89S Te 6 gu O OO ETNA etn 89 Id Zo en 29 24 ST CH EU Ok M h A OD CAUSE O N B NO SZISTEL TMS dH y g au 8n U AH E Slo S N zg usd N 68b1 DEEN EN Idd ue O D D za NI An Sn pO le ONS o 2 2 98547 13 A N I I r 2 N sn D O N N kel Sie z n O O b2TS2 eo 2 U en vn CH In O zn N op ey Id 852 13 A 5 O 22 H E90E E V BES OIS 449084 071 191435 9314040d40INI SH3ISAS 13437835 v E D g DD O E O Appendix F Schematic Appendix F Schematic Omega Engineering OMG SIO 530 Page 22 Appendix G Compliance Notices Appendix G Compliance Notices Federal Communications Commission Statement FCC This eguipment has b
7. 2 Figure 3 Header E2 and E3 IRQ Selection Position M amp N allow the user to select a single interrupt per port mode or a shared interrupt mode The N selects the single interrupt per port mode which is the typical DOS OS 2 and Windows 3 1 mode of operation The M selects the shared interrupt mode which allows more than one port to access a single IRQ and indicates the inclusion of a 1K ohm pull down resistor required on one port when sharing interrupts This mode is used by software that requires COM3 and COM4 to share interrupts with COMI and COM2 or in an OEM configuration to support a specific software application Note Most communications software applications default COM3 to IRQ4 and COM4 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 IRO selection Note The actual Silk Screen for the OMG SIO 530 may have a 2 in place of the IRO 2 9 selection Omega Engineering OMG SIO 530 Page 3 Card Setup Interface Selection Headers El and E2 connect the DB 25 connector P1 to either RS 232 interface drivers receivers RS 422 485 interface drivers receivers or to the Current Loop receiver interface Note On E2 y
8. 232 and most RS 422 or a 100 Ohm high impedance ground The 100 Ohm high impedance ground is normally used in RS 485 and some RS 422 to avoid ground loop currents with long cables Omega Engineering OMG SIO 530 Page 7 Card Setup E1 Jumper setting for 20 mA Current Loop El GND EN E CL ME RI EHINI DCD NEE DSR Im CTS HH RD EE B A Figure 8 Header EI 20 mA Current Loop Interface Selected GND Ground A selects normal ground for Current Loop EN N A CL Current Loop B selects Current Loop receive data RI Ring Indicator not used B sets it true CD N A DSR N A CTS NA RD Receive Data Remove or Float on one pin for Current Loop Omega Engineering OMG SIO 530 Page 8 Installation Installation The OMG SIO 530 can be installed in any of the PC expansion slots but to access the AT or E ISA IRQ s 10 11 12 15 it must be installed in one of the 16 bit slots The OMG SIO 530 contains several jumper straps for each port which must be set for proper operation prior to installing the adapter into the computer 1 Turn off PC power Disconnect the power cord 2 Remove the PC case cover 3 Locate an available slot and remove the blank metal slot cover 4 Gently insert the OMG SIO 530 into the slot Make sure that the adapter is seated properly 5 Replace the screw 6 Replace the cover 7 Con
9. Contents INTRODUCTION uje nanesi de eg ee dee ee A OVERVIEW EE 1 WHAT S INCLUDED n oeseseseseessrcesesceseerrsreresrcrrsesereresrreerereseeseees 1 FACTORY DEFAULT SETTINGS nena 1 CARD SETUP cccscsiccccccsssscctccsscectcseccccsscssccobstoascobscdsccobccsescosccees 2 PORT ENABLE DISABLE ees ee EE 3 IRO SELECTION per ta Se Se SE be ee vee vj ee Maata ka Se 3 INTERFACE SELECTION esse see ee esse ees ss see ee ee ese see ee ese ee ee ee ee ee ee 4 E2 JUMPER SETTINGS ene 4 El Jumper setting for R 232 esse esse esse ee see ee ee ee 5 El Jumper setting for RS 530 and RS 422 6 El Jumper setting for RS ANN 7 El Jumper setting for 20 mA Current Loop 8 INSTALLATION sedes es dek ee doeke ee Sade de doe ed do hee dek Ee od be ye 9 TECHNICAL DESCRIPTION ccccssscccsssccsscscesccccsscscsscccessccees LO CONNECTOR PIN ASSIGNMENTS ee ee ese ee ee ee ee ee ee 11 AE PERE N EE EE EE OE EE N TO 11 AE ELE PIE oe RE IE EA AE OE RE N 11 RS 530 422 485 Line Termination 11 20 mA Current LOOP 12 CURRENT LOOP CONNECTIONS ee ee ee ee ee 12 Passive Connection eenia ee t E E 12 Active Copnnecton 12 SPECIFICATIONS iii ea ds 13 ENVIRONMENTAL SPECIFICATIONS cccccccsseeeecceceeeeeaeseeeecceeeeeas 13 MANUFACTURING nena 13 POWER CONSUMPTION oi E LAS S EE A ENIN 13 MEAN TIME BETWEEN FAILURES MTBE
10. Mode GND Input CTS Input DSR Input DCD Data Carrier Detet 8 jem RS 530 422 485 Signal Name Pin Mode 6ND Ground TI DSRA DSR Data Set Ready Negative 6 Input DCDA DCD Data Carrier Detect Negative 1 8 Input RS 530 422 485 Line Termination Typically each end of the RS 530 422 485 bus must have line terminating resistors A 100 ohm resistor is across each RS 530 422 485 input in addition to a IK ohm pull up pull down combination that bias the receiver inputs Omega Engineering OMG SIO 530 Page 11 Technical Description 20 mA Current Loop Signal Name Pin 21 TD 25 12 TD 2 11 Ground Cd To perform a loop back test connect pins 21 to 25 24 to 12 and 11 to 7 Current Loop Connections Passive Connection Loop Input Pin 12 RD to Customer Current Source Pin 11 RD to Customer TD output Loop Output Pin 25 TD to Customer Current Source Pin 24 TD to Customer RD Input Active Connection Loop Input Pin 21 Current Source 1 to Pin 12 RD Pin 11 RD to Customer TD From Customer TD to Pin 7 Ground Loop Output Pin 9 Current Source 2 to Pin 25 TD Pin 24 TD to Customer RD From Customer RD to Pin 7 Ground Omega Engineering OMG SIO 530 Page 12 Specifications Specifications Environmental Specifications Temperature 0 to 50 C 20 to 70 C Range 32 to 122 F 4 to 158 F Hu
11. S 530 422 Interface Selected Ground B selects 100 Ohm ground for RS 530 422 Enable A position for RS 530 Current Loop A selects RS 530 Receive Data Ring Indicator not used on RS 530 B sets it true Data Carrier Detect B selects RS 530 Data Set Ready B selects RS 530 Clear To Send B selects RS 530 Receive Data B selects RS 530 Omega Engineering OMG SIO 530 Page 6 Card Setup E1 Jumper setting for RS 485 es mad GND EN CL RI DCD DSR CTS RD gt Il Figure 7 Header El RS 485 Interface Selected GND Ground B selects 100 Ohm ground for RS 485 EN Enable driver with RTS B A is always enabled CL Current Loop A selects RS 485 Receive Data RI Ring Indicator not used on RS 485 B sets it true DCD Data Carrier Detect B selects RS 485 DSR Data Set Ready B selects RS 485 CTS Clear To Send B selects RS 485 RD Receive Data B selects RS 485 E1 position EN is used to enable the driver with RTS To permanently enable the driver normal RS 422 point to point mode remove jumper EN at El Failure to correctly set this jumper can cause transmitter contention problems preventing operation by any nodes on the network El position GND determines whether the board provides a direct ground connection as in RS
12. e communication lines The logic of a Current Loop communications circuit is determined by the presence or absence of current typically or 20 mA When referring to the specification the current value is usually states i e 20 mA Current Loop Current Loop is used for point to point communication and there are typically two current sources one for transmit and one for receive These two current sources may be located at either end of the communication line To ensure a proper current path to ground or loop the cabling of two current loop communication ports will depend on the location of the current sources Current Loop is normally good for data rates up to 19 2 Kbps This limitation is due to the fact that the drivers and receivers are usually optically isolated circuits that are inherently slower than non isolated equivalent circuits Omega Engineering OMG SIO 530 Page 19 Appendix D Asynchronous Communications Appendix D 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 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 com
13. e 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 multi drop 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 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 controls the state of the driver Some communication software packages refer to RS 485 as RTS enable or RTS block mode transfer 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 Tx to Rx and Tx to 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 Omega Engineering OMG SIO 530 Page 18 Appendix C Electrical Interface 20 mA Current Loop This communication specification is based on the presence or absence of current not voltage levels over th
14. een 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 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 EWG and of the low voltage directive 73 23 EWG 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 1 Residential commercial and light industry 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
15. en Troubleshooting a problem This will eliminate the software issue from the equation Omega Engineering OMG SIO 530 Page 15 Appendix B How To Get Assistance Appendix B How To Get Assistance Please refer to Appendix A Troubleshooting prior to calling Technical Support Read this manual thoroughly before attempting to install the adapter in your system When calling for technical assistance please have your user manual and current adapter settings If possible please have the adapter installed in a computer ready to run diagnostics Omega Engineering maintains a Web site at WWW OMEGA COM where the latest manuals and software revisions may be found 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 800 826 6342 x2295 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 OMG SIO 530 Page 16 Appendix C Electrical Interface 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 It is defined by the EIA as the Interface between Data Terminal Equipment and Data Circuit Ter
16. face Selected 6 Figure 7 Header E1 RS 485 Interface Selected T Figure 8 Header E1 20 mA Current Loop Interface Selected 8 Figure 9 Asynchronous Communications Bit Diagram 20 1996j Omega Engineering Incorporated All rights reserved Introduction Introduction Overview The OMG SIO 530 provides the PC with one asynchronous serial port which can interface to RS 232 RS 422 RS 485 and 20 mA Current Loop devices What s Included The OMG SIO 530 is shipped with the following items If any of these items are missing or damaged contact the supplier e OMG SIO 530 Serial I O Adapter e 3 5 Serial Utility Diskette e User Manual Factory Default Settings The OMG SIO 530 factory default settings are as follows Base Address IRQ Electrical Specification 3F8 RS 232 To install the OMG SIO 530 using factory default settings refer to Installation on page 9 For your reference record installed OMG SIO 530 settings below Base Address IRQ Electrical Specification Omega Engineering OMG SIO 530 Page 1 Card Setup Card Setup The OMG SIO 530 contains several jumper straps which must be set for proper operation The OMG SIO 530 occupies 8 consecutive I O locations A DIP switch is used to set the base address for these locations Be careful when selecting the base address as some selections conflict with exi
17. midity Range 10 to 90 R H 10 to 90 R H Non Condensing Non Condensing Manufacturing e IPC 610 A Class Il standards are adhered to with a 0 1 visual A Q L and 100 Functional Testing e 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 12 VDC 12 VDC 5 VDC 50mA 195 mA Mean Time Between Failures MTBF Greater than 150 000 hours Calculated Physical Dimensions Board length 4 9 inches 12 446 cm Board Height including Goldfingers 4 2 inches 10 66 cm Board Height excluding Goldfingers 3 9 inches 9 91 cm Omega Engineering OMG SIO 530 Page 13 Appendix A Troubleshooting Appendix A Troubleshooting A Serial Utility Diskette is supplied with the Omega Engineering adapter and will be used in the troubleshooting procedures By using this diskette 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 Omega Engineering adapter so that there is no conflict with currently installed adapters No two adapters can
18. minating Equipment Employing Serial Binary Data Interchange The mechanical implementation of RS 232 is on a 25 pin D sub connector RS 232 is capable of operating at data rates up to 20 Kbps at distances less than 50 ft The absolute maximum data rate may vary due to line conditions and cable lengths RS 232 often operates at 38 4 Kbps over very short distances The voltage levels defined by RS 232 range from 12 to 12 volts RS 232 is a single ended or unbalanced interface meaning that a single electrical signal is compared to a common signal ground to determine binary logic states A voltage of 12 volts usually 3 to 10 volts represents a binary 0 space and 12 volts 3 to 10 volts denotes a binary 1 mark The RS 232 and the EIA TIA 574 specification defines two type of interface circuits Data Terminal Equipment DTE and Data Circuit terminating Equipment DCE The Omega Engineering adapter is a DTE 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
19. munication 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 usual 1 1 5 or 2 An extra bit used for error detection is often appended before the stop bits Idle state of Odd Even ma jp 5 to 8 Data Bits Unused ee 1 MEEL EE LE O EA TOE EE N 2245 a T EZ F OTT Ts ETTI I 1 ler STOP 4 alia ne otsene la Ee ME EF TA A E o l Itt rim 1 p15 ke 2 d 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 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
20. nect the power cord Installation is complete Omega Engineering OMG SIO 530 Page 9 Technical Description Technical Description The OMG SIO 530 provides one async serial port which can interface to RS 232 RS 530 RS 422 RS 485 and 20 mA Current Loop Features include e DB 25 male connector mounted on board bracket Port can be addressed as COM1 4 or any other I O address up to 3FF Hex e Interrupt Request IRQ lines are jumper selected for IRQ 3 4 5 and 2 9 e RS 232C Interface with all standard PC signals TD RD RTS CTS DSR DCD DTR RI or RS 530 422 interface e Serial port interface RS 232 RS 530 422 485 20 mA Current Loop is determined by jumper selection The OMG SIO 530 is designed for asynchronous only operation and therefore implements only those signals associated with async operation The DTE mode for RS 530 is assumed The OMG SIO 530 utilizes the 16550 UART chip This chip features programmable baud rate data format interrupt control and has a 16 byte transmit and receive FIFO The OMG SIO 530 can be addressed as COM1 COM2 or any other I O address up to 3FF Hex providing total compatibility with most communications software and languages RS 232 RS 530 422 485 and 20 mA Current Loop compatible drivers and receivers are provided on the serial port Omega Engineering OMG SIO 530 Page 10 Technical Description Connector Pin Assignments RS 232 Signal Name Pint
21. ou must move all eight push on jumpers This is required to completely isolate RS 232 signals from RS 422 485 and vice versa On E1 however there are several jumper options E2 jumper settings ES E2 RS 232 ESA KEE EE tre i Oo s E2 RS 530 422 485 EES EEA EEE EE E2 20 mA Current Loop EEH EE EE EE Figure 4 Header E2 options Omega Engineering OMG SIO 530 Page 4 Card Setup E1 Jumper setting for RS 232 GND EN CL DCD DSR CTS RD GND E es es um TU Figure 5 Header El RS 232 Interface Selected Ground A selects normal ground for RS 232 Enable A Not Applicable to RS 232 Current Loop A selects RS 232 Receive Data Ring Indicator A enables RI B sets it true Data Carrier Detect A selects RS 232 Data Set Ready A selects RS 232 Clear To Send A selects RS 232 Receive Data A selects RS 232 Omega Engineering OMG SIO 530 Page 5 Card Setup E1 Jumper setting for RS 530 and RS 422 GND EN CL DCD DSR CTS El GND EN CL RI DCD DSR CTS RD A Figure 6 Header EI R
22. sting ports The following table shows several examples that typically do not cause a conflict SW1 sets the I O address for the OMG SIO 530 Hex A9 ao 1 2 3 4 5 6 7 Figure 1 Address Selection Table The following illustration shows the correlation between the DIP switch setting and the address bits used to determine the base address In the example below address 300 is selected as a base Address 300 in binary is XX11 0000 OXXX where X a non selectable address bit AQ A3 EN Figure 2 DIP Switch Illustration Note Setting the switch On or Closed corresponds to a 0 in the address while leaving it Off or Open corresponds to a 1 Refer to Appendix A for common address contentions Omega Engineering OMG SIO 530 Page 2 Card Setup Port Enable Disable Each port on the OMG SIO 530 can be enabled or disabled with switch position 8 on the DIP switch The port is enabled with the switch On or Closed and disabled when Off or Open If any port is disabled be sure to disable the interrupt request for that port by removing the IRQ jumper IRQ Selection Header E3 selects the interrupt request for the serial port If COMI is selected this jumper must be on the IRQ4 setting If COM2 is selected this jumper must be on IRQ3 Consult your particular software for IRQ selection If no interrupt is desired remove the jumper HIHI MN7543
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