3527 User Manual
Contents
1. Many other adapters do not allow the sharing of IRQs Try the Sealevel Systems adapter with a unique IRQ Make sure the adapter 1s securely installed For Windows operating systems the diagnostic tool WinSSD is installed in the SeaCOM 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 Remember if a No Echo mode is selected a data loopback cannot be accomplished Always use the Sealevel Systems diagnostic software when troubleshooting a problem This will eliminate any software issues from the equation If these steps do not solve your problem please call Sealevel Systems Technical Support 864 843 4343 Our technical support 1s free and available from 8 00 AM to 5 00 PM Eastern Time Monday through Friday For email support contact supportO sealevel com O Sealevel Systems Inc C2 104 485 1 User Manual Appendix B How To Get Assistance Begin by reading the Troubleshooting Guide in Appendix A This will help solve most common problems When calling for technical assistance please have the device installed and ready to run diagnostics If possible have your user manual and current adapter settings ready The Sealevel website is an excellent resource Our homepage is located online at http www sealevel com The most current software updates and user manuals are available via our homepage by cl2. 3527 is shipped with the following items If any of these items is missing or damaged please contact Sealevel for replacement m C2 104 485 1 Item 3527 PC 104 RS 422 RS 485 Software Selectable Isolated Serial Interface Sealevel Software CD SeaCOM software and user manual Optional Items Depending upon your application you are likely to find one or more of the following items useful with the 3527 All items can be purchased from our website http www sealevel com or by calling our sales team at 864 843 4343 Cables 10 Pin IDC Ribbon Cable to DB9M Item CA 152 E The CA152 allows connects to the 10 pin header on a A PC 104 boards and provides a DB9M connector that E can be panel mounted in an enclosure This cable is y eight inches in length DB9F to DB9M Extension Cable Item CA127 The CA127 allows users to extend a DB9 cable up to s1x feet The connectors are pinned one to one so the cable 1s compatible with any device or cable with DB9 connectors DB9F RS 422 to DB25M RS 530 Cable y Item CA176 vA The CA176 allows users to convert any Sealevel RS SY A Y 422 DB9 Male asynchronous adapter to an RS 530 N DB25 Male pinout This cable is ten inches in length DB9F to DB9F 207M SMPTE Cable Item CA190 The CA190 connects any Sealevel DB9 RS 422 device to a Sony or compatible 207M SMPTE 9 pin connector This cable 1s 72 in length Sealevel Systems Inc a De C2 104 485
3. List appears select Add a new hardware device at the bottom of the list Windows will ask 1f you want the system to search for additional devices Select I want to install the hardware I manually select from a list and click on the Next button Windows will display a list of common hardware types Select Show all devices and click on Next The system will compile a thorough list of hardware Once the list is compiled locate the left hand column and select Sealevel Systems Inc from the list Next locate the right hand column and select C4 104 485 1 PC 104 4 Port RS 422 485 3547 y from the list and click Next O Sealevel Systems Inc 10 C2 104 485 1 User Manual Windows will show a warning message that the hardware has not passed Windows logo testing Click on the Continue anyway button Note all applications and drivers have been fully tested to maintain the integrity of your operating system Clicking on Continue anyway will not harm your system in any way m The Completing Add Hardware wizard will appear At the bottom of the window click on the link titled View or change resources for this hardware advanced m On the Resources page click on the Set configuration manually button Note Be sure that the setting you select for the configuration match the settings on your board Note This window will show the default settings for the I O address and
4. Odd Even ine H 5 to 8 Data Bits sen noie 4 ea ly 4 eva a AT De RTL lar ta DI dii la citi leto 0 nl ICI te1 gt 1 fe_1 5 gt khe 9 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 1 e 9600 N 8 1 Sealevel Systems Inc 20 C2 104 485 1 User Manual Appendix E Silk Screen 3527 0 35 i 9 300 2 900 0 200 ET E4 RS485 echo disable H RoHs no 0 200 ES 3 15 interrupt 3 15 selection HEI hon RoHs La FET ES PD interrupt pulldown 28 l FIDI wp LULLA i za OOOO ad O I 6a be 10000010001 Fina 3 375 paia Mio B jai I
5. one IRQ Since Windows cannot detect the settings there may be a conflict with another device or the settings shown may be not the settings you wish to use To change the settings choose the appropriate basic configuration number in the Setting Based On field to match the card settings Inthe Resource Settings box scroll to the bottom of the list and double click on IRQ to open the Interrupt Request box Inthe Value field select the interrupt that the board is set to This interrupt will be shared by all four ports m Click on Ok to close the interrupt request box m Click on Ok again to close the Resource Settings box and click on Finish in the Completing Add Hardware box The computer will prompt you to shut down and reboot the system 2 Once the hardware has been installed restart your system 3 After the system reboots the Found New Hardware wizard will appear for each port that you are installing up to four in this case m Click on Install the software automatically followed by the Next button The warning message stating that the device has not passed Windows logo testing will appear this is the same message you saw earlier in the process and you should click on Continue Anyway m Click on Finish Repeat this process for the remaining ports on the card Note The installation instructions above are best used with Windows XP If you are using a differ
6. technical specifications and shall be free of defects in materials and workmanship for life In the event of failure Sealevel will repair or replace the product at Sealevel s sole discretion Failures resulting from misapplication or misuse of the Product failure to adhere to any specifications or instructions or failure resulting from neglect or abuse are not covered under this warranty Warranty service 1s obtained by delivering the Product to Sealevel and providing proof of purchase Return authorization must be obtained from Sealevel Systems before returned merchandise will be accepted Authorization is obtained by calling Sealevel Systems and requesting a Return Merchandise Authorization RMA number The Customer agrees to insure the Product or assume the risk of loss or damage in transit to prepay shipping charges to Sealevel and to use the original shipping container or equivalent Warranty is valid only for original purchaser and is not transferable 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 This warranty applies to Sealevel manufactured Product Product purchased through Sealevel but manufactured by a third party will retain the original manufacturer s warranty Sealevel Systems Incorporated 2
7. 1 User Manual Terminal Blocks Terminal Block Kit Item KT105 The KT105 terminal block kit breaks out a DB9 connector to 9 screw terminals to simplify field wiring of serial connections including RS 422 and RS 485 networks The kit includes one DB9 terminal block Item TBO5 and one DB9M to DB9F 72 extension cable Item CA 127 Terminal Block DB9F to 9 Screw Terminals Item TB05 The TBOS terminal block breaks out a DB9 connector to 9 screw terminals to simplify field wiring of serial connections including RS 422 and RS 485 networks The TBOS is designed to connect directly to Sealevel DB9 serial cards or any cable with a DB9M connector Adapters and Converters DB9F to RJ45 Modular Adapter Item RJ9S8 The RJ9S8 is a DB9 female to RJ45 adapter It can be configured without tools and it is an excellent choice for using available infrastructure wiring DB9F RS 422 to DB9F Converter Item DB103 MEA The DB103 is designed to convert a Sealevel DB9 male RS 422 connector to a DB9 female pinout AD compatible with AC24AT and AC422AT Opto 22 se ISA bus cards Sealevel Systems Inc Je C2 104 485 1I User Manual PC 104 Adapter Kits PC 104 to CompactFlash Adapter Item CF104 The CF104 allows users to easily add a CompactFlash memory card with an IDE interface to a PC 104 stack The CF104 includes an adapter board built into the PC 104 form factor The arrangement of mounting holes at the co
8. 5022 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 to prevent or correct the interference Always use cabling provided with this product if possible If no cable is provided or if an alternate cable 1s required use high quality shielded cabling to maintain compliance with FCC EMC directives Sealevel Systems Inc DD C2 104 485 1 User Manual Warranty WARRANTY Trademarks Sealevel s commitment to providing the best I O solutions is reflected in the Lifetime Warranty that is standard on all Sealevel manufactured products We are able to offer this warranty due to our control of manufacturing quality and the historically high reliability of our products in the field Sealevel products are designed and manufactured at its Liberty South Carolina facility allowing direct control over product development production burn in and testing Sealevel Systems Inc hereafter Sealevel warrants that the Product shall conform to and perform in accordance with published
9. 779 Greenville Highway P O Box 830 Liberty SC 29657 USA 864 843 4343 FAX 864 843 3067 www sealevel com email supportOsealevel com Technical Support is available Monday Friday from 8 a m to 5 p m Eastern time Sealevel Systems Incorporated acknowledges that all trademarks referenced in this manual are the service mark trademark or registered trademark of the respective company O Sealevel Systems Inc Di C2 104 485 1 User Manual
10. C2 104 485 1 User Manual di a I a ij n Ra LH milli A Item Number 3527 SYSTEMS INCORPORATED www sealevel com PO Box 830 Liberty SC 29657 864 843 4343 Table of Contents INTRODUCTION o ta 1 BEFORE YOU GE F STAR PED es En sans Aai 2 SE A aula 2 OPTIONAL GEMS ss ll oe beste oe ec eee bbe eee cence Lease 2 CARD SEPUR nn a e naa a ei io lec lol io cor do 5 ADDRESS S ELEC LION olii laica alli 5 PORT ENA BIE DISABLE aula nn 5 IROS EEC EO lea 5 INTERRUPPE AA PP N eT 6 CEOCLE MODE Seas o T A 7 OSCIELATOR VALUE ALTA SINO Ms tin 7 BADIA TES a tes celia cities ot cn as alee nee ate settee 8 PROGRAMMABLE FEATURES caselli 10 LINE TERMINATION ili 10 RI435 E O clas 10 INSTALLATION oc a Oa 11 SOFTWARE INSTALLATION coi a oline 11 HARDWARE INSTALLATION alla elle ia di i 11 HARDWARE CONFIGURATION cccsceccsceccsceccccecscscccececeececeecscesescuceececeececescsssescesesceseseesseeceees 12 ELECTRICAL SPE CIBICA TIONS wii cik ciidsscciveis icdcccasenadvcdsadesecenusauvsdacdesecdaeoadeccestacescscostvessccste 15 CONNECTOR INS e tied dt io D cree 15 TECHNICAL SPECIFICATIONS nn aS 16 APPENDIX A TROUBLES HOOT ING cecccccccccccccccccccccccccccccccccccccccccccccccccccscecs 17 APPENDIX B HOW TO GET ASSISTANCE u cccccccccccccccccccccccccccccccccccccccccccccecs 18 APPENDIX C ELECTRICAL INTEREA CES ni rias 19 APPENDIX D ASYNCHRONOUS COMMUNICA TIONS 1 ccccsccccc
11. ar Otherwise navigate to the root directory of your CD drive and double click the autorun exe application to launch the installation window 4 Select Install 5 Type in your part number 3547 to select your adapter from the listing 6 The setup file will automatically detect the operating environment and install the proper components You are now ready to proceed with installing the 3547 in your system Refer to the following section Hardware Installation for details Linux Refer to the Linux Serial HOWTO found on the Sealevel Software CD This series of files both explains typical Linux serial implementations and informs the user about Linux syntax and preferred practices In addition the software selectable interface settings can be accessed by referencing D software seacom Other Linux Utilities 3540_Configuration_Utility Hardware Installation Take extreme care when installing the adapter to avoid damaging the PC 104 connector pins Be sure to follow proper ESD procedures by grounding yourself and the adapter To install the 3547 into your computer follow the steps below 1 Turn off PC power and disconnect the power cord 2 Remove the case cover if applicable Sealevel Systems Inc 11 C2 104 485 1 User Manual Te 8 Mount the hardware using the nylon stand offs and or screws provided to ensure a good mechanical connection Retain any unused mounting hardware for future expansio
12. are enabled when a valid I O selection is made If the adapter is disabled be sure to disable the interrupt request by removing the IRQ jumper IRQ Selection The 3527 has an interrupt selection jumper labeled E5 for both ports Be sure to set the interrupt required by your application prior to installation Consult the manual included with your software application to determine the proper setting O Sealevel Systems Inc 25s C2 104 485 1 User Manual The jumpers located at ES are used to select the appropriate interrupt for the adapter The jumper for the 1K pull down resistor labeled PD on ES connects the resistor to the interrupt line to keep the line from floating This jumper must be connected when either a single board or multiple boards on different interrupts are in use In situations where multiple cards are sharing interrupts only one board in the group should have the PD resistor connected An image and a drawing of ES are included below ONU BW 10 11 12 15 PD IRQ Select IRQ Select Interrupt Modes Shared interrupt mode is used to allow more than one PC 104 board to share a single IRQ The switch position S on DIP switch SW1 when moved to the on position selects the shared interrupt mode for the adapter When configuring two or more PC 104 adapters the following criteria must be met m The S switch on DIP switch SWI should be set to on for each adapter that will share an inte
13. cccccccccccccess 20 APPENDIX E SILK SCREEN 3527 50 e 21 FEDERAL COMMUNICATIONS COMMISSION STATEMENT csccsceccscecececcscecscececcececescecsesceses 22 WARRANT eduli 23 Sealevel Systems Inc C2 104 485 l User Manual SL9193 Revision 6 2008 Introduction The 3527 PC 104 serial interface provides two serial ports with 1 500VDC port to port isolation that protect the host system from ground loops and voltage transients that are common in remote installations and industrial environments For maximum versatility without opening the PC 104 stack each port is software configurable for full duplex 4 Wire RS 422 or RS 485 Half duplex 2 Wire RS 485 mode is also supported The auto enable circuit automatically handles the RS 485 driver which eliminates the risk of bus contention and data corruption With the driver controlled in hardware the RS 485 ports are treated as standard serial COM ports by the operating system Features 1 500VDC port to port isolation Each port is software configurable for 4 wire RS 422 485 or 2 wire RS 485 16954 buffered UART with 128 byte FIFOs Automatic hardware RS 485 enable disable UART support for 9 bit protocol Data rates to 921 6K bps Jumpers on each port for suppressing ECHO Two 10 pin vertical header connectors Extended temperature range available 40 C 85 C Sealevel Systems Inc La C2 104 485 1 User Manual Before You Get Started What s Included The
14. d Sealevel Systems DB9 pinout for RS 422 485 This pinout is shown below Ci 6 NC 8 NC __ 9 Ne Sealevel Systems Inc 15 C2 104 485 1 User Manual Technical Specifications Dimensions Height Height top bottom Length Width Environmental Specifications 70 C 50 C 105 C Roda 158 F 58 F 221 F 10 to 90 R H 10 to 90 R H Non Condensing Non Condensing Temperature Range Humidity Range Manufacturing All Sealevel Systems printed circuit boards are built to UL 94VO rating and are 100 electrically tested These printed circuit boards are solder mask over bare copper or solder mask over tin nickel Sealevel Systems Inc 16 C2 104 485 1 User Manual Appendix A Troubleshooting The adapter should provide years of trouble free service However in the event that device appears to not be functioning incorrectly the following tips can eliminate most common problems without the need to call Technical Support l 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 For more information refer to the Address Selection portion of this manual
15. ent version of Windows and need additional assistance contact Technical Support at 864 843 4343 Sealevel Systems Inc e C2 104 485 l User Manual To confirm that the drivers have been successfully installed you can look in the Device Manager under Ports COM amp LPT and each of the ports that you installed should be included on the list with their associated COM numbers In addition the software selectable settings can be accessed and changed via the Advanced tab in the device manager The Software Selectable Cards section allows the electrical interface to be changed between RS 422 RS 485 3 wire and RS 485 4 wire For additional information reference the Programmable Features section of this manual O Sealevel Systems Inc A C2 104 485 1 User Manual Electrical Specifications The 3527 provides 4 RS 422 485 software programmable ports from a single PC 104 adapter The 3527 utilizes the 16954 UART This chip supports 9 bit protocol and features programmable baud rate data format interrupt control and industry leading 128 byte transmit and receive FIFOs Connector Pinouts 10 pin Pinout This board uses a 10 pin 0 1 box header for each of its four ports This pinout for each port is included below 3 RX Data DB9 Pinout The optional CA152 cable is an eight inch long IDC ribbon cable with a 10 pin connector on one end and a DB9 male connector on the other This cable provides the standar
16. faces also have greater drive capabilities that allow for longer cable lengths RS 422 1s 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 one 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 is backwardly compatible with RS 422 however it is optimized for party line 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 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 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 pin
17. icking on the Drivers or Manuals links located under Technical Support Manuals and software can also be downloaded from the product page for your device The FAQ section of our website answers many common questions Refer to this helpful resource by visiting http www sealevel com faq asp Technical support is available Monday through Friday from 8 00am to 5 00pm EST and can be reached by phone at 1 864 843 4343 or via email at support sealevel com 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 O Sealevel Systems Inc 18 C2 104 485 1 User Manual Appendix C Electrical Interfaces RS 422 RS 485 The RS 422 specification defines the electrical characteristics of balanced voltage digital interface circuits RS 422 1s 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 inter
18. iding the baud rate you wish to achieve by eight The resulting number will be the baud rate you will need to tell your system in order to cause your card to run at the desired rate In situations where you are communicating with the hardware directly or using software that requires a divisor you will need to select a divisor that will cause your card to run at the desired rate The table below includes some common divisors Note You can also select other divisors by diving 921 6K by your intended baud rate The resulting number will be the divisor that you will need to give your system for your card to run at the desired rate O O 96 O 4 2 l 4 2 38 4K bps 57 6K bps 115 2K bps 230 4K bps 460 8K bps 921 6K bps O Sealevel Systems Inc 8 C2 104 485 1 User Manual O Sealevel Systems Inc 9 C2 104 485 1 User Manual Programmable Features Each of the ports on the 3547 can be individually software configured as an RS 422 or RS 485 interface Electrical interface selection is handled via the Control port Base 15 or via the Sealevel SeaCOM driver interface in Windows Device Manager Power up default 2 wire RS 485 with RTS xX 0 oo _1 REARS dire RTS ato enable 0 1 1 RS 485 4 wire DTR auto enable 0 1 RS 485 2 wire RTS auto enable DO RS 422 485 D1 RTS DTR auto enable D2 2 wire 4 wire Line Termination Typically each end of the RS 485 bus must have line te
19. ll LULU sa 3 775 3 375 A FIDE ea ELITE EN ui o ad TL olill ji Base Addr Select 210000000000000000000000000000000035 4100000000000000000000000000000000132 coB00000OOOOOOOOOOOOOO is FIS pad Opia 0 208 3547 REV B COPYRIGHT 2008 0 206 0 288 3 150 0 209 KB 3 550 A All dimensions are in inches Sealevel Systems Inc D C2 104 485 1 User Manual 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 1f 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 the users 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 EN5
20. n Gently insert the adapter noting proper key orientation of the expansion connector on a PC 104 compatible card The adapter is keyed per the current PC 104 specification to prevent the adapter from being inserted incorrectly After the adapter is installed connect up to four I O cables to the 10 pin headers at Ports 1 through 4 These headers are keyed to prevent cables from being installed incorrectly Note The optional CA152 cable is an eight inch long IDC ribbon cable with a 10 pin connector on one end and a DB9 male connector on the other end The CA152 can be panel mounted in your enclosure Proceed with adding additional PC 104 cards if applicable and secure with additional standoffs If this board is at the top of the PC 104 stack secure the board with 4 40 machine screws Replace the cover 1f applicable Connect the power cord and power up the machine You are now ready to configure the PC 104 adapter to work in your application Refer to the following section Hardware Configuration for details Hardware Configuration l Run the Add Hardware utility located in the Control Panel Double click the icon to launch the wizard and follow the prompts Windows will first search for plug and play devices Windows will be unable to locate the board because it is not plug and play The wizard will ask if you have already installed the hardware click on yes When the Installed Hardware
21. rminating resistors RS 422 terminates at the receive end only A 120 ohm resistor is across each RS 422 485 input in addition to a 510 ohm pull up pull down combination that biases the receiver inputs If multiple 3527 adapters are configured in an RS 485 network only the boards on each end should have the termination in place If you have additional questions on how to remove this termination contact Technical Support at 864 843 4343 RS 485 Echo The RS 485 Echo is the result of connecting the receiver inputs to the transmitter outputs Each 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 but it can also confuse the system if the software cannot support echoing Echo is controlled on a per port basis by jumpers El and E2 When a jumper is in place Echo 1s suppressed Similarly Echo can be enabled by removing a jumper from the appropriate port The image below shows jumper El located next to PI Sealevel Systems Inc 10 C2 104 485 1 User Manual Installation Software Installation Windows 98 ME NT 2000 XP Vista Operating Systems Do not install the adapter in the machine until the software has been fully installed 1 Start Windows 2 Insert the Sealevel Software CD in to your CD drive 3 If Auto Start is enabled the installation window will automatically appe
22. rners allows the board to be rotated and mounted 180 degrees on the long axis PC 104 to 2 5 Hard Drive Adapter Item HD104 The HD104 allows users to easily add an optional 2 5 hard drive with an IDE interface to a PC 104 stack The HD104 includes an adapter board built into the PC 104 form factor and offers two different mounting options O Sealevel Systems Inc sd C2 104 485 1 User Manual Card Setup The 3527 contains a single 4 position DIP Switch labeled SW1 that provides the address selection for the adapter and a jumper strip labeled ES providing the IRQ selection for the adapter Address Selection Each port on the 3527 occupies sixteen consecutive I O locations The DIP switch is used to set the base address for the serial ports and the following table shows the addressing options available If different address options are required please contact Sealevel Systems Technical Support about a custom PAL option SW1 1 SW1 2 SW1 3 ON OFF OFF 600 6107 The fourth switch S on the DIP switch is used to allow a shared interrupt between multiple PC 104 adapters Reference the Interrupt Modes section on the following page for additional information An image and a drawing of the DIP switch SW1 are shown below 123 S85 ON SW1 OFF Base Addr Select Port Enable Disable Both ports on the 3527 can be disabled by setting the three switches in the Off position The ports
23. rrupt The IRQ jumpers E5 on each adapter need to be set to the same IRQ Each board must be set to a different address For example if two boards are used the addresses might be set as follows Refer to the Address Selection section for additional information m Only one card in the group should have the pull down PD on ES activated O Sealevel Systems Inc 6 C2 104 485 1 User Manual The image below shows what the DIP switch and jumper settings would look like for two PC 104 boards installed in the same computer ES ES O ES L O L y IRQ Select IRQ Select Board 1 Board 2 In situations where PC 104 boards do not need to share interrupts make sure that the switch position S on DIP switch SW1 is moved to the off position In addition the IRQ jumpers on ES should be set to different interrupts for each board Clock Modes The 3527 utilizes a 14 7456 MHz oscillator This is eight times faster than a standard COM port oscillator which typically 1s 1 8432 MHz This allows the adapter to achieve a maximum data rate of 921 6K bps The following sections outline the baud rate calculations and instructions for achieving your desired baud rate Oscillator Value Aliasing If Windows operating system used the oscillator value 14 7456 MHz should be entered into the Advanced tab in the Device Manager This 1s usually done automatically when the Sealevel SeaCOM driver is loaded If
24. s 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 pinout or a set of modem control signals RS 485 does not define a physical connector Sealevel Systems Inc 19 C2 104 485 1 User Manual 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 1s the standard means of serial data communication for PC compatible 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 starting bit followed by a pre defined number of data bits 5 6 7 or defines character boundaries for asynchronous communications The end of the character 1s 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 1s often appended before the stop bits The diagram below demonstrates asynchronous communication bits Idle state of
25. you are using a Windows operating system the Sealevel SeaCOM driver will typically set the oscillator value automatically To set the value manually open the Windows Device Manager and click on Ports COM amp LPT Locate the port number for your device and right click to select Properties In the Properties window open the Port Settings tab and click on the Advanced button Enter the oscillator value 14 7456 Note If using an operating system other than Windows you may need to manually enter the oscillator value If you do not do this all data rates will be eight times the selected rate For example 1f a data rate of 19 2Kbps 1s selected the actual data rate will be 153 6Kbps Refer to Baud Rates section on the following page for appropriate settings and divisors O Sealevel Systems Inc y C2 104 485 1 User Manual Baud Rates The SeaCOM driver for Windows will automatically set the correct data rate for your card However 1f you are using an operating system other than Windows the data rate will be eight times the selected rate You may need to set the data rate manually in order to configure the card to run at the desired rate If your operating system does not allow you to manually set the oscillator value on your card you will need to select a data rate that 1s eight times less than the desired rate The table below includes some common data rates Note You can also choose additional baud rates by div
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