2403 User Manual
Contents
1. cccccsssssssssssssssssssssseses LL APPENDIX B HOW TO GET ASSISTANCE cccocccsccccccsscsseoees 12 APPENDIX C ELECTRICAL INTERFACE cccccccssscsccscssseeeee 13 RS 2232 pastaen irettesatt 13 RS422 stk EE EE 13 RS 485 Hannene ser Resto 14 APPENDIX D ASYNCHRONOUS COMMUNICATIONS 000066 15 APPENDIX E COMPLIANCE NOTICES cccscscssssscssscscscscseee 10 FEDERAL COMMUNICATIONS COMMISSION STATEMENT 665 16 CANADIAN RADIO INTERFERENCE REGULATIONS eeeaerennrnrrrvrrrereer 16 EMC DIRECTIVE STATEMENT cccccccccccccccsccccesesesesesescesseeseceeees 17 Figures Figure 1 Switches SW2 and SW4 sevessesvennenvennverennvennennennennenneenennsenevneens 6 Figure 2 RS422 485 Interface Configuration esevevovvvvnrenrennverennvenevneen 7 Figure 3 Electrical Interface Configuration seresevenovnvvnrennennverevnvenevneens 8 Figure 4 Asynchronous Communications Bit Diagram 000 15 O Sealevel Systems Inc SL9102 Revision 7 2010 Sealevel Systems Incorporated All rights reserved Introduction Introduction Overview The Sealevel Systems SeaPORT 4 equips the PC with 4 USB to RS 232 422 485 Asynchronous serial ports providing a versatile interface for common serial needs The advantage of this product over more traditional approaches is that it does not require opening the computer case nor does it require resources such as I O ports or IRQ s It does require a system tha2. Configuration Switch Examples Continued Port 4 ditt Po Port 1 Port 2 Port 3 Port 4 Port 3 Port 2 Port 1 RS 422 485 RS 232 RS 232 RS 422 485 SW4 RS 422 485 RS 232 ort L EE Se Ei Se ma Du mu L DE DE L ma T mu ma T nea PU E pa PU ma PD E CH Port2 PD na na DE Ba DE Bu ma Da ma ma ma mu ma ma Ba ma E3 4 E5 6 E7 ER Figure 3 Electrical Interface Configuration RS 232 The corresponding shunt is in the 232 position The switches will have no effect RS 485 two wire communication with no echo The corresponding shunt is in the 422 485 position Switches 485 2 NE 2 and Port 2 L L T PU and PD are all in the ON position RS 422 with 120 ohm termination The corresponding shunt is in the 422 485 position Switches 485 3 NE 3 and Port 3 L L PU and PD are all in the OFF position T is in the ON position RS 485 two wire communication with echo The corresponding shunt is in the 422 485 position Switches 485 4 and Port 4 L L T PU and PD are all in the ON position NE 4 is in the OFF position Sealevel Systems SeaPORT 4 Page 8 Specifications Technical Description The SeaPORT 4 utilizes four USB UARTs These chips feature programmable baud rate data format 128 byte Dual Port TX Buffer and 384 byte Dual Port RX Buffer The RS 232 422 485 transceiver supports data rates up to 921 6K baud for RS 422 485 and 460 8K baud for RS 232 Features e Hot pluggable dev
3. Appendix A Troubleshooting Appendix A Troubleshooting Serial Utility test software is supplied with the Sealevel Systems adapter and will be used in the troubleshooting procedures Using this software and following these simple steps most common problems can be eliminated without the need to call Technical Support 1 If your adapter isn t working first check to make sure that USB support is enabled in the System BIOS and it is functioning properly in the operating system This can be done by using either the Windows 98 ME or Windows 2000 Device Manager Ensure that the Sealevel Systems software has been installed on the machine so that the necessary files are in place to complete the installation When the SeaPORT 4 is configured properly the USB Enabled LED E will be lit This should allow you to use Sealevel s WinSSD utility and the supplied loopback plug to check communications The supplied loopback plug connects TD to RD If you decide to test the Modem Control Signals a full pin loopback plug will be required Details on loopback plugs are included on WinSSD Contact Sealevel Systems if you need further assistance When testing the SeaPORT 4 in loopback mode you should see the port LED s flashing as well as seeing echoed data on the screen The loopback test first transmits a HEX pattern 55AA and then a ASCII string of data If this test passes then the SeaPORT 4 is ready for use in your application Please
4. SEALEVEL SYSTEMS INCORPORATED SeaPORT 4 Kaff d LEVE ATIVE1 0 SOLUTIONS i Se i K D al Part 2403 Sealevel Svstems Inc Phone 864 843 4343 P O Box FAX 864 843 3067 Liberty SC 29657 USA www sealevel com Table of Contents INTRODUCTION unne ege eege kidsa OVERVIEW isete erd said 1 WHAT S INCLUDED ukreditert sd veide 1 INSTALLATION INSTRUCTIONS eesessvsvsvsvsvsvsvsvsvsvsvsvsesvsesesvsesesese 2 WINDOWS 98 ME 2000 XP VISTA OPERATING SYSTEMG 2 PHYSICAL INSTALLATION seaaanunnnnnnnnnnrnnernnnnenernnnnnnnnsnsrensnnssssnsssnsnsnene 3 CONFIGURATION sissctscesscccsccsscesstesssetesessssestessscdesesesesslessesdesesaee D ORIGINAL CONFIGURATION rorerrvnrsernannrnrnnnssnsnannnnrvenssrssennnnnsenssrnnene 5 ELECTRICAL INTERFACE SELECTION cc ccccccceesesscecececeesesssaeeeeeees 5 SWITCH EXAMPLES EE 7 SWITCH EXAMPLES CONTDNUED 8 TECHNICAL DESCRIPTION ccccscssssssscsccccccccccsscscccccccsccccssesee H FEATURES Heen 9 CONNECTOR PIN ASSIGNMENTS ccccccccccccccceescecscscscececesseseeseseeees 9 Ki NES LO ENVIRONMENTAL BPECIEICATIONS ee 10 MANUPACTURIN Ges ves sccenec decavneesizccecededscndesecdtecedecsvnsesicecesecddstnorseets 10 POWER CONSUMPTION rmrrnnnnnorrrnrnrrrensnnrnrnenssrnnennrnnnenssnsnannrnnsenseee 10 MEAN TIME BETWEEN FAILURES OMTBEN 10 PHYSICAL DIMENSIONS errrennrorrrnvrrrrennnnrnrnvnrsennennnnrnenssnsnannnnnnenseee 10 APPENDIX A TROUBLESHOOTING
5. alevel Systems SeaPORT 4 Page 3 Installation System Properties EI Disk drives Si Display adapters Sa Floppy disk controllers amp Hard disk controllers F Keyboard Monitors Mouse Network adapters Wl Ports COM amp LPT Communications Port COM1 Wl ECP Printer Port LPT1 SeaPORT 4 USB Serial Converter Port 1 COM3 EI SeaPORT 4 USB Serial Converter Port 2 COM4 x SeaPORT 4 USB Serial Converter Port 3 COM 3 SeaPORT 4 USB Serial Converter Port 4 COMB You can access your new COM ports by using the assigned COM identifiers as shown above In this case it is COM3 4 5 and 6 However this assignment will vary from system to system At this point the hardware is recognized and ready to use Sealevel Systems SeaPORT 4 Page 4 Configuration Configuration Original configuration This device ships from Sealevel Systems with the following configuration 422 mode 120 ohm termination 1K ohm pull up on RX 1K ohm pull down on RX In order to change this configuration the box must be opened Do this by removing the four screws located on the bottom When reassembling please note that the top and bottom are keyed to fit in only one direction Electrical Interface Selection Each of the four ports on the SeaPORT 4 can be individually configured as an RS 232 RS 422 or RS 485 interface This is selectable via the DIP switches and DIP shunts Each of the switch positions is described on the follow
6. g ends The communication parameters are baud rate parity number of data bits per character and stop bits i e 9600 N 8 1 Sealevel Systems SeaPORT 4 Page 15 Appendix E Compliance Notices Appendix E Compliance Notices Federal Communications Commission Statement 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 residential installation 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 However there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful interference to radio or television reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures e Reorient or relocate the receiving antenna e Increase the separation between the equipment and receiver e Connect the equipment into an outlet on a circuit different from that to which the receiver is connected e Consult the dealer or an experienced radio TV technician for help Caution Sealevel Systems Inc is not responsible for any radio or televis
7. harm to your system During setup you may specify installation directories and other preferred configurations This program also adds entries to the system registry that are necessary for specifying the operating parameters for each driver An uninstall option is included to remove the driver and all registry INI file entries from your system Proceed with the physical installation of your SeaLINK USB serial adapter NOTE Windows NT is not USB aware and thus cannot AN support this device Sealevel Systems SeaPORT 4 Page 2 Installation Physical Installation The screen captures below are taken from a Windows 98 installation Your particular operating system may differ slightly from what is shown based on your version of Windows The SeaPORT 4 can be connected to any upstream type A port either at the PC host or an upstream hub The SeaPORT 4 is hot pluggable meaning there is no need to power down your computer prior to installation Connect the SeaPORT 4 to an upstream host or hub The New Hardware Found wizard will now proceed to locate the appropriate drivers These drivers were installed during the SeaCOM software setup procedure Once the drivers are found a new window will pop up indicating the installation of each of the four new ports If you view the system s Device Manager you should have new COM ports in the Ports COM amp LPT Device Class This is shown on the following page Se
8. ice that does not require opening the case e No system resources are required i e I O ports or IRQ s e LED status indicators for USB Enabled and port activity Connector Pin Assignments RS 422 485 DB 9 Male GND Ground 1 5 RTS Request To Send Positive 6 Output CTS Clear To Send Positive 9 Input CTS Clear To Send Negative 8 Input RS 232 DB 9 Male GND Ground 85 CTS ClearToSend Is Input DSR Data SetReady Io Input RI Ring Indicator 9 wn Sealevel Systems SeaPORT 4 Page 9 Specifications Specifications Environmental Specifications Specification Operating Temperature 0 to 50 C 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 Al Sealevel Systems Printed Circuit boards are built to UL 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 This device is a high power USB device It must be plugged into the USB root hub or a self powered hub capable of supplying 500 mA per port Mean Time Between Failures MTBF Greater than 150 000 hours Calculated Physical Dimensions Package Length 7 06 inches 17 93 cm Package Width 5 32 inches 13 51 cm Package Height 1 50 inches 3 81 cm Sealevel Systems SeaPORT 4 Page 10
9. ing page Sealevel Systems SeaPORT 4 Page 5 Configuration Switch Descriptions PU PD Figure 1 Switches SW2 and SW4 485 option OFF for 422 OFF No effect ON Connects TX to RX for two wire operation 485 option OFF for 422 OFF No effect ON Connects TX to RX for two wire operation 485 option OFF for 422 OFF No effect ON Adds a1 K ohm pull up resistor to RX 485 option OFF for 422 OFF No effect ON Adds a I K ohm pull down resistor to RX 422 and 485 option OFF No effect ON Adds a 120 ohm termination resistor between RX and RX Sealevel Systems SeaPORT 4 Page 6 Configuration Switch Examples 485 NE Figure 2 RS422 485 Interface Configuration Mode Selection OFF ON 422 Mode The transmitter lines TX and TX are always driven 485 Mode The transmitter lines TX and TX are switched to high impedance when the device is not actively transmitting data 485 option OFF for 422 OFF ON The receiver is always enabled In a two wire setup the receiver will echo back all transmitted data The receiver is disabled when the transmitter is enabled In a two wire setup the receiver will not echo back transmitted data Note Switch positions I and 2 are for port I and switch positions 3 and 4 for port 2 on SW3 Switch positions I and 2 are for port 3 and switch positions 3 and 4 for port 4 on SW1 Sealevel Systems SeaPORT 4 Page 7 RS 232 RS 422 485
10. ion interference caused by unauthorized modifications of this equipment or the substitution of attachment of connecting cables and equipment other than those specified by Sealevel Systems Such unauthorized modifications substitutions or attachments may void the user s authority to operate the equipment The correction of interference caused by such unauthorized modifications substitutions or attachments will be the responsibility of the user 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 directives Canadian Radio Interference Regulations This Class A digital apparatus meets all requirements of the Canadian Interference Causing Equipment Regulations Cet Appareil num rique de la classe A respecte toutes les exigences de R glement sur le mat riel du Canada Sealevel Systems SeaPORT 4 Page 16 Appendix E Compliance Notices EMC Directive Statement Products bearing the CE Label fulfill the requirements of the EMC directive 89 336 EEC and of the low voltage directive 73 23 EEC issued by the European Commission To obey these directives the following European standards must be met EN55022 Class A Limits and methods of measurement of radio interference characteristics of information technology equipment EN55024 Information technology equipment Immunity character
11. istics Limits and methods of measurement EN60950 IEC950 Safety of information technology equipment including electrical business equipment 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 EMC directives Sealevel Systems SeaPORT 4 Page 17 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 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 s
12. ndix 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 The IBM PC computer defined the RS 232 port on a 9 pin D sub connector and subsequently the EIA TIA approved this implementation as the EIA TIA 574 standard This standard is defined as the 9 Position Non Synchronous Interface between Data Terminal Equipment and Data Circuit Terminating Equipment Employing Serial Binary Data Interchange Both implementations are in wide spread use and will be referred to as RS 232 in this document 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 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 The RS 232 and the EIA TIA 574 specification define two types of interface circuits Data Terminal Equipment DTE and Data Circuit Terminating Equipment DCE The SeaPORT 4 is a DTE device 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
13. note that if the adapter is configured for 2 wire RS 485 with no echo a loopback test is not possible The receiver in this case will be turned off and the test will fail If you plan on using this device in two wire mode test the adapter in RS 422 mode first Then configure the adapter for your application Sealevel Systems SeaPORT 4 Page 11 Appendix B How To Get Assistance Appendix B How To Get Assistance Please refer to Appendix A Troubleshooting prior to calling Technical Support 1 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 connected in a computer ready to run 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 thru 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 A RETURN MERCHANDISE AUTHORIZATION RMA NUMBER Sealevel Systems SeaPORT 4 Page 12 Appendix C Electrical Interface Appe
14. red through a simple and straightforward programming interface Character boundaries for asynchronous communications are defined by a starting bit followed by a pre defined number of data bits 5 6 7 or 8 The end of the character is defined by the transmission of a pre defined number of stop bits usually 1 1 5 or 2 An extra bit used for error detection is often appended before the stop bits Idle state of Odd Even p 5 to 8 Data Bits tee Remain Idle or next start bit I 1 elek deet ier lt df get lte em e t 1 ler STOP E EE E ee GE Oe GE d 0 Fer pen HE 15 4 Lei Figure 4 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 receivin
15. ronments RS 485 tri state driver not dual state will allow the electrical presence of the driver to be removed from the line Only one driver may be active at a time and the other driver s must be tri stated RS 485 can be cabled in two ways two wire and four wire mode Two wire mode does not allow for full duplex communication and requires that data be transferred in only one direction at a time For half duplex operation the two transmit pins should be connected to the two receive pins 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 Sealevel Systems SeaPORT 4 Page 14 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 transfer
16. t supports USB both in terms of hardware and operating system What s Included The SeaPORT 4 is shipped with the following items If any of these items is missing or damaged contact the supplier e SeaPORT 4 USB to RS 232 422 485 Serial I O Adapter e USB Cable Part Number CA179 for Connecting to Upstream Host Hub e Sealevel Software Sealevel Systems SeaPORT 4 Page 1 Installation Installation Instructions Windows 98 ME 2000 XP Vista Operating Systems Do not connect the device to a USB port until the software is installed l 2 3 Start Windows Insert the Sealevel Software CD in to your CD drive If Auto Start is enabled the installation window will automatically appear Otherwise navigate to the root directory of your CD drive and double click the autorun exe application to launch the installation window Select Install Software Select the Part Number for your device from the listing The setup file will automatically detect the operating environment and install the proper components Follow the information presented on the installation screens that follow A screen may appear with the declaration The publisher cannot be determined due to the problems below Authenticode signature not found Please select the Yes button and proceed with the installation This declaration simply means that the Operating System is not aware of the driver being loaded It will not cause any
17. the difference in voltage between a pair of outputs or inputs In contrast a single ended interface for example RS 232 defines the logic levels as the difference in voltage between a single signal and a common ground connection Differential interfaces are typically more immune to noise or voltage spikes that may occur on the communication lines Differential interfaces also have greater drive capabilities that allow for longer cable 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 Sealevel Systems SeaPORT 4 Page 13 Appendix C Electrical 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 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 envi
18. upport Q sealevel com Technical Support is available from 8 a m to 5 p m Fastern 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 SeaPORT 4 is a trademark of Sealevel Systems Incorporated Sealevel Systems SeaPORT 4 Page 18
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