7402 User Manual
Contents
1. 11 CONNECTOR PIN 51 12 RS 422 485 DB 9 Male ce eeceesseesseeeeesceeseeseeeseesteenseenaes 12 DB 37 Connector Pin Assignment rrnrnnrrnrrrnvrrnvrrnrrnnrrrnrrnner 12 SPECIFICATIONS cisessessscescdcsssetscnseccscecdsscesessesesetcesscostestesevctece LI ENVIRONMENTAL SPECIFICATIONS 13 MANUFACTURING ta ae 13 POWER CONSUMPTION cccccscesssscecsesseeecseececessaececseaaeeesseeeenenaes 13 MEAN TIME BETWEEN FAILURES MTBF n se 13 PHYSICAL DIMENSIONS c cccssssceceeseeecssececesseeecseeeeseeseeeenenaes 13 APPENDIX A TROUBLESHOOTING cccsssscssscsccccessssssccceees 14 PCI COM NUMBER SELECTION IN WINDOWS 95 98 15 APPENDIX How TO GET ASSISTANCE cccccssscsccccsscseeee 16 APPENDIX ELECTRICAL INTERFACE cccccccscsssscccccssceee 17 APPENDIX D ASYNCHRONOUS COMMUNICATIONS 18 APPENDIX E SILK SCREEN cccccccscssssssssscscccccescesesssccsoeees L9 APPENDIX F COMPLIANCE NOTICES sccccccccccsssssssssscceees 20 FEDERAL COMMUNICATIONS COMMISSION STATEMENT 0604 20 EMC DIRECTIVE STATEMENT 20 WARRANTY Geert 21 Figures Figure 1 Headers J1B J4B RS 422 sesovevervvennvnvenvnenvennevvennsenennvenevnesnser 3 Figure 2 Headers J1B J4B RS 485 Auto Enabled with No Echo 3 Figure 3 Headers J1B2. NE For RS 422 530 449 compatibility remove the jumpers at JIB J4B Examples on the following pages describe all of the valid settings for JIB J4B Sealevel Systems ULTRA COMM 422 PCI Page 2 Card Setup Interface Mode Examples J1B J4B AT O RT NE H Figure l Headers JIB J4B RS 422 Bee Figure 2 Headers JIB J4B RS 485 Auto Enabled with No Echo AT RT N Figure 3 Headers JIB J4B RS 485 Auto Enabled with Echo Sealevel Systems ULTRA COMM 422 PCI Page 3 Card Setup Interface Mode Examples J1B J4B continued Ea lt Figure 4 Headers JIB J4B RS 485 RTS Enabled with No Echo a ad lt z Figure 5 Headers JIB J4B RS 485 RTS Enabled with Echo Address and IRQ selection The ULTRA COMM 422 PCI is automatically assigned I O addresses and IRQs by your motherboard BIOS Only the I O addresses may be modified by the user Adding or removing other hardware may change the assignment of I O addresses and IRQs Sealevel Systems ULTRA COMM 422 PCI Page 4 Card Setup Line Termination Typically each end of the RS 485 bus must have line terminating resistors RS 422 terminates the receive end only 120 ohm resistor is across each RS 530 422 485 input in addi
3. Technical Description In the early days of PC s Sealevel Systems decided that the ability to share IRQs was an important feature for any add in I O card Consider that in the IBM XT the available IRQs were IRQO through IRQ7 Of these interrupts only IRQ2 5 and IRQ7 were actually available for use This made the IRQ a very valuable system resource To make the maximum use of these system resources Sealevel Systems devised an IRQ sharing circuit that allowed more than one port to use a selected IRQ This worked fine as a hardware solution but presented the software designer with a challenge to identify the source of the interrupt The software designer frequently used a technique referred to as round robin polling This method required the interrupt service routine to poll or interrogate each UART as to its interrupt pending status This method of polling was sufficient for use with slower speed communications but as modems increased their through put abilities this method of servicing shared IRQs became inefficient Why use an ISP The answer to the polling inefficiency was the Interrupt Status Port ISP The ISP is a read only 8 bit register that sets a corresponding bit when an interrupt is pending Port 1 interrupt line corresponds with Bit DO of the status port Port 2 with D1 etc The use of this port means that the software designer now only has to poll a single port to determine if an interrupt is pending The ISP is at Base
4. 7 on each port Example Base 280 Hex Status Port 287 28F etc The ULTRA COMM 422 PCI will allow any one of the available locations to be read to obtain the value in the status register Both status ports on the ULTRA COMMH 422 PCI are identical so any one can be read Example This indicates that Channel 2 has an interrupt pending Bit Position 7 6 5 4 3 2 1 0 Value Read 0 0 O 0 O 10 1 10 Sealevel Systems ULTRA COMM 422 PCI Page 11 Technical Description Connector Pin Assignments RS 422 485 DB 9 Male VOND 6 Output CTS Clear To Send Positive 9 Input CTS Clear To Send Negative 8 Input DB 37 Connector Pin Assignments Sealevel Systems ULTRA COMM 422 PCI Page 12 Specifications Specifications Environmental Specifications Temperature 0 to 50 20 to 70 C Range 32 to 122 F 4 to 158 F Humidity Range 10 to 90 R H 10 to 90 R H Non Condensing Non Condensing Manufacturing e Sealevel Systems 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 620 mA Mean Time Between Failures MTBF Greater than 150 000 hours Calculated Physical Dimensions Board length 5 0 inches 12 7 cm Board Height including Goldfingers 4 2 inches 10 66 cm
5. J4B RS 485 Auto Enabled with Echo 3 Figure 4 Headers J1B J4B RS 485 RTS Enabled with No Echo 4 Figure 5 Headers J1B J4B RS 485 RTS Enabled with Echo 4 Figure 6 Headers J1A J4A Line 5 Figure 7 Clocking Mode Divide By 4 sscsssssssssssssessssseessesesees 6 Figure 8 Clocking Mode Divide By 2 ssscsssssssssesssesssesssessesesees 6 Figure 9 Asynchronous Communications Bit 1 18 Sealevel Systems Inc SL9063 Revision 7 2006 Sealevel Systems Incorporated All rights reserved Introduction Introduction Overview The Sealevel ULTRA COMMH 422 PCI is a four channel PCI Bus serial I O adapter for the PC and compatibles supporting data rates up to 460 8K bps RS 422 provides excellent communications for long distance device connections up to 4000ft where noise immunity and high data integrity are essential Select RS 485 and capture data from multiple peripherals in RS 485 multidrop network In both RS 485 and RS 422 modes the card works seamlessly with the standard operating system serial driver In RS 485 mode our special auto enable feature allows the RS 485 ports to be viewed by the operating system as COM port This allows the standard COM driver to be utilized for RS 485 communications Our on board hardware automatically handles the RS 485
6. 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 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 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 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 Only one driver may be active at 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 time For half duplex operation the two transmit pins should be connected to the two receive pins Tx to Rx an
7. Board Height excluding Goldfingers 3 875 inches 9 841 cm Sealevel Systems ULTRA COMM 422 PCI Page 13 Appendix Troubleshooting Appendix Troubleshooting Serial Utility test software is supplied with the Sealevel Systems 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 Sealevel Systems adapter so that there is no conflict with currently installed adapters No two adapters can occupy the same I O address Make sure the Sealevel Systems adapter is using 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 Sealevel Systems 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 Sealevel Systems adapter is configured correctly The supplied software contains a diagnostic program SSD that runs under DOS and will verify if an adapter is configured properly T
8. ENABLE SE 2 3 PORT3 J3x L CONNECT RX TO TX PORT4 J4x P PULL UP DOWN ENABLE 5 2 Sealevel Systems ULTRA 422 1 Appendix F 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 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 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 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 nterference characteristics of information technology equipment e EN55024 Information technology equipment Immunity characteristics Limits and methods of measuremen
9. SEALEVEL SYSTEMS INCORPORATED ULTRA COMM 422 PCI USER MANUAL Part 7402 cg Systems Inc Phone 864 843 4343 Liberty SC 29657 USA FAX 864 843 3067 www sealevel com Contents INTRODUCTION scsicoseccsscssesdicsosascesceseessscesescedesseacessesesdescessesesoess I BAVA i EATA ht ar 1 WHAT S INCLUDED vrn N 1 FACTORY DEFAULT SETTINGS vrrrorrnannnnrrrnrnrsernennrnrnnnsserrennrnnnenseneren 1 CARD SETUP sosccccsscecccsdecsctecasenscesscdsccddssceaccssccsctdsssctsseacecectdseocss 2 RS 485 ENABLE MODES cccsssssceessscecessececseeeecessueeecessaeeecseaeees 2 Interface Mode Examples J1B J4B 4 ADDRESS AND IRQ SELECTION c ccssseceeeceeeseceeeeecnaeceeeeeenaeeeeneees 4 LINE TERMINATION 5 BAUD RATES AND DIVISORS FOR THE DIV1 MODE cceccees 7 BAUD RATES AND DIVISORS FOR THE DIV2 MODE ccceeeeees 8 OPERATING SYSTEM INSTALLATION cscecesseeeececeeeeeneecsneeeeneecees 9 For Windows USers c cccccccesssesssecessceessecessceeseecesseeeeseecsseeeeseeees 9 Other Operating Systems ssnernrrrnrrrnrrnrrrnvernvrrnvrrnrrrsrrnserserrseenne 9 SYSTEM INSTALLATION 9 TECHNICAL DESCRIPTION ccccccsssssscsscccccccesessccccccsccseesescees 10 Interruptsissdsrs aske seer Gatens de 10 WHY USBEANISP
10. Sealevel Systems Incorporated 2779 Greenville Highway P O Box 830 Liberty SC 29657 USA 864 843 4343 FAX 864 843 3067 www sealevel com email support sealevel com Technical Support is available from 8 a m to 5 p m Eastern time Monday Friday Trademarks Sealevel Systems Incorporated acknowledges that all trademarks referenced in this manual are the service mark trademark or registered trademark of the respective company ULTRA COMM 422 PCI is a trademark of Sealevel Systems Incorporated Sealevel Systems ULTRA COMM 422 PCI Page 21
11. a 16 byte input and output FIFO A full array of advanced UARTS is also available for this card Contact Sealevel Systems for more information Interrupts A good description of an interrupt and its importance to the PC can be found in the book Peter Norton s Inside the PC Premier Edition One of the key things that makes a computer different from any other kind of man made machine is that computers have the capability to respond to the unpredictable variety of work that comes to them The key to this capability is a feature known as interrupts The interrupt feature enables the computer to suspend whatever it is doing and switch to something else in response to an interruption such as the press of a key on the keyboard A good analogy of a PC interrupt would be the phone ringing The phone bell is a request for us to stop what we are currently doing and take up another task speak to the person on the other end of the line This is the same process the PC uses to alert the CPU that a task must be preformed The CPU upon receiving an interrupt makes a record of what the processor was doing at the time and stores this information on the stack this allows the processor to resume its predefined duties after the interrupt is handled exactly where it left off Every main sub system in the PC has it s own interrupt frequently called an IRQ short for Interrupt ReQuest Sealevel Systems ULTRA COMM 422 PCI Page 10
12. ansfer One of the unique features of the ULTRA COMMH 422 PCI 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 ULTRA COMM 422 PCI in an RS 485 application with existing 1 e standard RS 232 software drivers Headers J1B J4B are used to control the RS 485 mode functions for the driver circuit The selections are RTS enable silk screen RT or Auto enable silk screen AT 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 Position 3 silk screen NE of JIB J4B is 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 To select the No Echo mode select silk screen position
13. d FE ee ot 8 l l l V r ISP 1 0 ed bo SEENE ep EE P 1 It mis 154 la 2 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 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 ie 9600 N 8 1 Sealevel Systems ULTRA COMM 422 PCI Page 18 Appendix Silk Screen Page 19 PORTS 4 2 RS485 PPTLL R16 R18 R20 PORT 1 J1 J2x Appendix E Silk Screen C4 R24 R29 U6 JxB JUMPER SETTIN R15 R17 R19 RS422 REMOVE ALL JUMPERS UTO
14. d Tx to Rx Four wire mode allows full duplex data transfers RS 485 does not define connector pin out or set of modem control signals RS 485 does not define physical connector Sealevel Systems ULTRA COMM 422 PCI Page 17 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 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 A start bit followed by a pre defined number of data bits 5 6 7 or 8 defines character boundaries for asynchronous communications 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 ine H 5 to 8 Data Bits l Unused end Der 1 ee ore Je Wy I T Po
15. driver enable What s Included The ULTRA COMM 422 PCI is shipped with the following items If any of these items are missing or damaged contact the supplier ULTRA COMM 422 PCI Serial I O Adapter Serial Utility Software Spider Cable providing 4 DB 9 connectors User Manual Factory Default Settings The ULTRA COMM 422 PCI factory default settings are as follows Port Clock DIV Mode Enable Mode Port 1 4 Auto Port 2 4 Auto Port 3 4 Auto Port 4 4 Auto To install the ULTRA COMM 422 PCI using factory default settings refer to Installation on page 9 For your reference record installed ULTRA COMM 422 PCI settings below Port Clock DIV Mode Enable Mode Port I Port 2 Port 3 Port 4 Sealevel Systems ULTRA COMM 422 PCI Page 1 Card Setup Card Setup In all cases J1x is for port 1 J2x port 2 J3x port 3 and J4x port 4 RS 485 Enable Modes RS 485 is ideal for multi drop or network environments RS 485 requires tri state driver 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 tr
16. his 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 Sealevel 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 Sealevel Systems diagnostic software when troubleshooting a problem This will help eliminate any software issues and identify any hardware conflicts Sealevel Systems ULTRA COMM 422 PCI Page 14 Appendix Troubleshooting PCI COM NUMBER SELECTION IN WINDOWS 95 98 When installing multi port PCI card in Windows 95 the default starting COM number assigned to the first port will be COM 5 if no COM 5 exists If there is a COM 5 6 etc the next available COM number will be assigned to the first port with all additional ports following in ascending order To change the first two ports so that Windows assigns them COM 3 and COM 4 port enumeration double click the Systems icon in control panel or right click on My Computer and choose properties which will bring you to System Properties Choose the Device Manager tab and double click on the Multi Function Adapter heading This will show all the information concerning the Sealevel adapter Choose the Resources tab which will show all resources assigned t
17. n diagnostics 3 Sealevel Systems maintains a Home page on the Internet Our home page address is www sealevel 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 00 a m to 5 00 p m eastern time Technical support can be reached at 864 843 4343 RETURN AUTHORIZATION MUST BE OBTAINED FROM SEALEVEL SYSTEMS BEFORE RETURNED MERCHANDISE WILL BE ACCEPTED AUTHORIZATION CAN BE OBTAINED BY CALLING SEALEVEL SYSTEMS AND REQUESTING RETURN MERCHANDISE AUTHORIZATION RMA NUMBER Sealevel Systems ULTRA COMM 422 PCI Page 16 Appendix 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 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 pair of outputs or inputs In contrast single ended interface for example RS 232 defines the logic levels as the difference in voltage between single signal and 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
18. o the multi function adapter Uncheck the Use Automatic Settings box Notice that with a two port card there will be three input output I O ranges listed With a four port card there will be five input output I O ranges listed The first I O range is for the PCI bus and should not be changed The second and third I O ranges are the ones that need to be changed in order to have those ports enumerated as COM 3 and COM 4 Double click on the second I O range which will allow you to change the address Highlight the entire I O range and type 03e8 03ef for COM 3 Click OK Windows will inform you that you have made modifications that may affect other devices Click OK Next double click on the third I O range Highlight the entire I O range and type 02e8 02ef for COM 4 Again Windows will inform you that you have made modifications that may affect other devices Click OK Following these steps will change the COM number assignments on the first two ports to COM 3 and 4 Sealevel Systems ULTRA COMM 422 PCI Page 15 Appendix How To Get Assistance Appendix How To Get Assistance Please refer to Appendix Troubleshooting prior to calling Technical Support I Read this manual thoroughly before attempting to install the adapter in your system 2 When calling for technical assistance please have your user manual and current adapter settings If possible please have the adapter installed in computer ready to ru
19. ollowing table For this Data Rate Choose this Divisor 1200 bps 192 2400 bps 96 4800 bps 48 24 9600 bps 19 2K bps 1 57 6K bps 115 2K bps 230 4K bps Sealevel Systems ULTRA COMM 422 PCI Page 8 Installation Installation 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 System Installation The ULTRA COMM 422 PCI can be installed in any of the PCI expansion slots and contains several jumper straps for each port that must be set for proper operation Turn off PC power Disconnect the power cord Remove the PC case cover Locate an available PCI slot and remove the blank metal slot cover Gently insert the ULTRA COMM 422 PCI 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 Sealevel Systems ULTRA COMM 422 PCI Page 9 Technical Description Technical Description The Sealevel Systems ULTRA COMM 422 PCI provides a PCI interface adapter with 4 RS 422 485 asynchronous serial ports for industrial automation and control applications The ULTRA COMM 422 PCI utilizes the 16550 UART This chip features programmable baud rates data format interrupt control and
20. position DIV2 i DIV1 DIV4 Figure 8 Clocking Mode Divide By 2 Sealevel Systems ULTRA COMM 422 PCI Page 6 Card Setup Baud Rates and Divisors for the DIV1 mode The following table shows some common data rates and the rates you should choose to match them if using the adapter in the DIV1 mode For this Data Rate Choose this Data Rate 1200 bps 300 bps 2400 bps 600 bps 4800 bps 1200 bps 9600 bps 2400 bps 19 2K bps 4800 bps 57 6 K bps 14 4K bps 115 2 K bps 28 8K bps 230 4K bps 57 6 bps 460 8K bps 115 2 K bps If your communications package allows the use of Baud rate divisors choose the appropriate divisor from the following table 1200 bps 384 2400 bps 192 9600 bps 48 19 2K bps 24 230 4K bps 460 8K bps Sealevel Systems ULTRA COMM 422 PCI Page 7 Card Setup Baud Rates and Divisors for the DIV2 mode The following table shows some common data rates and the rates you should choose to match them if using the adapter in the DIV2 mode For this Data Rate Choose this Data Rate 1200 bps 600 bps 2400 bps 1200 bps 4800 bps 2400bps 9600 bps 4800 bps 19 2K bps 9600 bps 38 4K bps 19 2K bps 57 6 K bps 28 8K bps 115 2 K bps 57 6 K bps 230 4 K bps 115 2 K bps If your communications package allows the use of Baud rate divisors choose the appropriate divisor from the f
21. t 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 Sealevel Systems ULTRA COMM 422 PCI Page 20 Warranty Warranty Sealevel Systems Inc provides a lifetime warranty for this product Should this product fail to be in good working order at any time during this period Sealevel Systems 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 Sealevel Systems 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 Sealevel Systems will not be liable for any claim made by any other related party RETURN AUTHORIZATION MUST BE OBTAINED FROM SEALEVEL SYSTEMS BEFORE RETURNED MERCHANDISE WILL BE ACCEPTED AUTHORIZATION CAN BE OBTAINED BY CALLING SEALEVEL SYSTEMS AND REQUESTING A RETURN MERCHANDISE AUTHORIZATION RMA NUMBER
22. tion to a 1K ohm pull up pull down combination that biases the receiver inputs Headers JIA J4A allow the user to customize this interface to their specific requirements Each jumper position corresponds to a specific portion of the interface If multiple ULTRA COMM 422 PCI adapters are configured in an 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 Adds or removes the IK ohm pull up resistor in the RS 422 RS 485 receiver circuit Receive data only Adds or removes the 120 ohm termination Connects the TX to RX for RS 485 two wire operation L Connects the TX to RX for RS 485 two wire operation PPT EE Figure 6 Headers JIA J4A Line Termination Sealevel Systems ULTRA COMM 422 PCI Page 5 Card Setup Clock Modes The ULTRA COMM 422 PCI employs a unique clocking option that allows the end user to select from divide by 4 divide by 2 and divide by 1 clocking modes These modes are selected at Headers J1C through J4C To select the Baud rates commonly associated with COM ports i e 2400 4800 9600 19 2 115 2K Bps place the jumper in the divide by 4 mode silk screen DIV4 Div ii DIV1 DIV2 Figure 7 Clocking Mode Divide By 4 To double these rates up to a maximum rate for 230 4K bps place the jumper in the divide by 2 silk screen DIV2
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