2423 User Manual
Contents
1. ceccscccscccccsccccccccess 18 APPENDIX E SILK SCREEN 2423 Dioses 19 APPENDIX F COMPLIANCE NOTICES cccsccscsccscesccccscesccccscescccccccscesccccscesccce 20 FEDERAL COMMUNICATIONS COMMISSION STATEMENT csccscecsceccececcscscescsceccececescecseececes 20 WARKKAN TY anat ds e dl dd os 21 O Sealevel Systems Inc SeaLINK 4 SC User Manual SL9194 Revision 7 2008 Introduction Sealevel s SeaLINK 2423 USB to serial interface adapter offers an easy way to connect up to four serial devices to a single USB port All configuration and electrical interface selections are handled through the driver and each port is individually software configurable for RS 232 RS 422 or RS 485 full and half duplex Sealevel s SeaCOM USB software drivers and utilities package makes installation and operation easy for Windows 98 ME 2000 XP and Vista operating systems Once the software is installed plug the 2423 into an available USB port and each serial port is recognized as standard COM ports by the host system this feature enables compatibility with legacy software The devices maintain their electrical interface settings locally allowing the host computer to be repaired or upgraded without reconfiguring the serial ports Additionally the devices can be configured at one computer and deployed to other computers To prevent accidental cable disconnection the 2423 includes a highly retentive USB Type B connector Stan2. If these steps do not solve your problem please call Sealevel Systems Technical Support 864 843 4343 Our technical support is free and available from 8 00 AM E RTS Toggle DTR O E DSR Al Dco O E wit to 5 00 PM Eastern Time Monday through Friday For email support contact support sealevel com Sealevel Systems Inc I5 lt SeaLINK 4 SC 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 clicking 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 WIL
3. 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 1t can also confuse the system if the software cannot support echoing Echo configuration is software selectable for half duplex RS 485 By default ECHO is disabled and this configuration can be set by placing a check next to Enable Echo in the RS 485 Advanced Configuration field as pictured below SeaLINK 8M 5C USB to Serial Port COM3 Properties 7 Fx General Port Settings Interface Settings Driver Details y SeallNK 86M 5C USE to Seral Port LM Interface AS 485 AS 4 65 Advanced Configuration Tx Mode Enable Termination e Enable Echo Sealevel Systems Inc 9 SeaLINK 4 SC User Manual Hardware Description Front High Retention Mode Data Status LEDs USB Port Power LED High Retention USB Port The upstream port integrates a high retention type B connector that prevents accidental disconnection of the USB cable Status LEDs Status LEDs on the front of the 2423 indicate the following information MODE Red or Green Indicates the electrical interface selected o Green indicates RS 232 mode o Red indicates RS 422 or RS 485 mode DATA Green Blinks to indicate data is being transmitted or rece
4. party This warranty applies to Sealevel manufactured Product Product purchased through Sealevel but manufactured by a third party will retain the original manufacturer s watranty 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 supportOsealevel com Technical Support is available Monday Friday from 8 a m to 5 p m Eastern time Trademarks 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 sdla SeaLINK 4 SC User Manual
5. 19 198 JIN gid sine SIN bin 1982 HIN tZ 1198 SIM LLD LF BA ela r m e B R e ise gt ls NM B a sl la E i lam E Gs iz Ly siy vi ca S Zlu i al jus 368 S f Et Me tio l mo mo f mo Tots mo so a se om a cs se jamen L se oe cue se Go mm L9 LU mh OY cgo oa mhm alt y co Yue cy Z oocoocooooo0oo0o000000000000 00000000000000000000 00000000000000000000O 00000000000000000000 NI 00y 0 NI 08Z Z NI 08Z Z NI OSTO NI 0 8 0 SeaLINK 4 SC User Manual 19 Sealevel Systems Inc Appendix F Compliance Notices Federal Communications Commission Statement FCC This equipment has been tested and found to comply with the limits for Class A digital device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause harmful interference to radio communications Operation of this equipment in a 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
6. 2 Extension Cable Item CA177 The CA177 is a standard AT style RS 232 modem cable with a DB9F connector on one end and a DB25M connector on the other This cable is 72 inches in length DB9F to DB9M Extension Cable Item CA127 The CA127 allows users to extend a DB9 cable up to six feet The connectors are pinned one to one so the cable is compatible with any device or cable that has DB9 connectors DB9F RS 422 to DB25M RS 530 Cable Item CA176 The CA176 allows users to convert any Sealevel RS 422 DB9 Male asynchronous adapter to an RS 530 DB25 Male pinout This cable is ten inches in length Sealevel Systems Inc re SeaLINK 4 SC User Manual Terminal Blocks Terminal Block DB9F to 9 Screw Terminals Item TBO5 The TBOS5 terminal block breaks out a DB9 connector to nine 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 Terminal Block Dual DB9F to 18 Screw Terminals Item TB06 The TB06 terminal block breaks out dual DB9 connectors to 18 screw terminals to simplify field wiring of serial connections including RS 422 and RS 485 networks The TB06 is designed to connect directly to Sealevel dual port DB9 serial cards or any cable with DB9M connectors Adapters and Converters DB9F to RJ45 Modular Adapter Item RJ9S8 The RJ9S8 is a D
7. 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 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 pinout or a set of modem control signals RS 485 does not define a physical connector Sealevel Systems Inc sie SeaLINK 4 SC 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 is 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 Transmitt
8. B9 female to RJ45 adapter It can be configured without tools and it is an excellent choice for using available infrastructure wiring Sealevel Systems Inc Je SeaLINK 4 SC User Manual Installation amp Configuration Software Installation Windows 98 ME 2000 XP Vista Operating Systems 1 Start Windows 2 Insert the Sealevel Software CD in to your CD DVD drive 3 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 Click on the Install button Type in your part number 2423 or select your adapter from the listing Click the Install Drivers button NY A Nn A The setup file will automatically detect the operating environment and install the proper components To confirm that the SeaCOM driver has been successfully installed click on the Start button and then select All Programs You should see the SeaCOM program folder listed You are now ready to proceed with connecting the 2423 to your system Refer to the Hardware Installation section for details Windows NT is not USB aware and thus cannot support this device Sealevel Systems Inc sds SeaLINK 4 SC User Manual Hardware Installation Do not connect the device to a USB port until the software has been successfully installed To install
9. 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 characteristics Limits and methods of measurement EN60950 1EC950 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 is required use high quality shielded cabling to maintain compliance with FCC EMC directives Sealevel Systems Inc 20 SeaLINK 4 SC User Manual Warranty WARRANTY 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 fa
10. L BE ACCEPTED AUTHORIZATION CAN BE OBTAINED BY CALLING SEALEVEL SYSTEMS AND REQUESTING A RETURN MERCHANDISE AUTHORIZATION RMA NUMBER Sealevel Systems Inc 16 SeaLINK 4 SC User Manual Appendix C Electrical Interfaces 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 E A 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 RS 422 The RS 422 specification defines the electrical characteristics of balanced voltage digital interface circ
11. Once you have confirmed that the COM ports are listed in Device Manager you can use the Sealevel WinSSD utility and a loopback plug to test communications Detailed help is included in the WinSSD utility If you have a loopback plug put it on the DB9 connector that you want to test If you don t have a loopback plug contact Technical Support for assistance If you re testing RS 485 mode you ll need to have ECHO enabled otherwise the following test will fail Refer to the Hardware Configuration section for instructions on enabling ECHO To test communications launch the WinSSD utility in the SeaCOM folder under the Start menu Sealevel Systems Inc slos SeaLINK 4 SC User Manual On the Port Information tab select the COM port you want to test and click on the Open button pictured below C WinSSD COM3 9600 8 N 1 None Port Information Loopback BERT Terminal Out Timeouts 00 ene Read Interval Timeout 100 Toggle DTR Read Total Timeout Multiplier 1100 In Read Total Timeout Constant 1 0 CTS Write Total Timeout Multipher 11 AD Settings _ Settings Write Total Timeout Constant 1100 DSA Error Log FI Frame Errors Parity Errors DEL As Buff Owertl Exit Tx Butt Overtl Help Click the Settings button to open the COM Properties menu Change your parameters to 9600 bits per second 8 data bits no parity 1 stop bit and no flow cont
12. SeaLINK 4 SC User Manual Item Number 2423 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 iio 2 SE A A O IN ae Ow A NO 2 OPTIONALATE MS a be este oc ec eee bbe ar a 2 INSTALLATION amp CONFIGURATION caisesiciccsnciscacdcectccciccseieisessecaccnccacecdencecacdceseieddecseiceasesess 4 SOFTWARE INSTALLATION oda 4 HARDWARE INSTALLA TON aan ceeds aac te eles Saale este ee A 5 VERIFYING INSTALLATION e a e ute ted erie ae tks 6 HARDWARE CONFIGURATION eis cassie ode 7 HARDWARE DESCRIPTION aain AAA aAa aaae ATTRA 10 ELECTRICAE SPECIFICATIO NS 11 ECECTRICAL SSPECIEICATTON Sa od 11 CONME TORNO UTE St cee aie ee ree e E 11 TECHNICALSPECIFICA TIONS cu e ts bes es 12 DIMENSTONS anses na ito ie os le at cee ad o ia os 12 ENVIRONMENTAL SPECIFICATIONS cccscescececcececcececcececcececececestececescecescecescscesescesescecescecsesceees 12 POWER REOUIREMENTS sorcerer te io ara a ead ede aes eee 12 MANUFACTURIN Gaerne se at sca era center ens oda ios aaa 12 APPENDIX A TROUBLESHOOTING ccecccccccccccccccccccccccccccccccccccccccccccccccccccccese 13 APPENDIX B HOW TO GET ASSISTANCE uu cecccccccccccccccccccccccccccccccccccccccccccccecs 16 APPENDIX C ELECTRICAL INTERFACES 1 ceccccccccccccccccccccccccccccccccccecs 17 APPENDIX D ASYNCHRONOUS COMMUNICA TIONS 2
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14. cility 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 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 is 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
15. d video and game controllers E E System devices El Universal Serial Bus controllers J Fa m E E a O Sealevel Systems Inc 6 SeaLINK 4 SC User Manual Hardware Configuration Electrical Interface Mode Selection The 2423 offers RS 232 RS 422 and RS 485 full and half duplex modes The electrical interface is a software selectable feature that can be accessed and changed using the Sealevel SeaCOM driver via Device Manager To select the electrical interface follow the steps below 1 Open Device Manager and locate Ports COM amp LPT following the steps above You should see each of the 2423 s ports listed 2 Select one of the ports by right clicking on it and selecting Properties from the fly out menu The serial port properties menu will appear 3 Click on the Interface Settings tab Note The Sealevel SeaCOM driver adds the Interface Settings tab If this tab is missing SeaCOM is not correctly installed SeaLINK 8M SC USB to Serial Port COM3 Properties 0 x General Port Settings Interface Settings Driver Details oot SeaLINK 8M SC USB to Serial Port COM3 Y Interface AS5 403 15 485 Adv ana ae He Tx Mode Hal Duples FS Enable Termination Enable Echo 4 Select the appropriate electrical interface for your application and click on OK Note The electrical interface settings are maintained across multiple com
16. dard operating temperature range is 0 C to 70 C and extended temperature range 40 C to 85 C is optional Status LEDs display electrical interface selection and serial data activity for each port Features Each port is individually software configurable for RS 232 RS 422 and two wire or four wire RS 485 Electrical interface settings maintained across multiple computers m High speed UART with 128 byte Tx FIFO and 384 byte Rx FIFO Automatic hardware RS 485 enable disable m Each serial port supports data rates to 921 6K bps Powered by USB host connection Four DB9M connectors with full modem control signals implemented in RS 232 mode m Status LEDs indicate power electrical interface and serial data activity for each port Sealevel Systems Inc mallee SeaLINK 4 SC User Manual Before You Get Started What s Included The 2423 is shipped with the following items If any of these items is missing or damaged please contact Sealevel for replacement m 2423 USB to RS 232 422 485 Four Port Serial Interface Adapter m CA179 USB Type A to USB Type B Device Cable 6 in Length 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 2423 All items can be purchased from our website http www sealevel com or by calling our sales team at 864 843 4343 Cables DB9F to DB25M RS 23
17. er 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 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 The diagram below demonstrates asynchronous communication bits Idle state of Odd Even line or main r H 5 to 8 Data Bits ___ unused dan 1 ARA ly 1 E TO Ae ea ee ee ae a l er STOP S PEE E EN EEE PERE EE ENEE A A ae EA eT 0 i a Came H 1 5 L 2 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
18. ived POWER Green Lights when the hub is properly powered through the USB connection RS 232 422 485 DB9M Serial Ports DB9M Serial Connectors The 2423 includes four DB9M serial connectors on the back of the device and full modem control signals are implemented Pinouts are included in the following Electrical Specifications section O Sealevel Systems Inc 10 SeaLINK 4 SC User Manual Electrical Specifications The 2423 connects to a single USB port and provides four RS 232 422 485 software configurable serial ports The 2423 utilizes high speed USB UARTs with 128 byte Tx FIFOs and 384 byte Rx FIFOs The chips feature programmable baud rates and data rates to 921 6K bps Connector Pinouts RS 232 DB9 Male Note Pins 6 9 are no connect RS 485 Two Wire DB9 Male 3 DATA 5 GND 3 DATA DATA 5 GND Note Pins 1 2 6 9 are no connect Sealevel Systems Inc 11 SeaLINK 4 SC User Manual Technical Specifications Dimensions Environmental Specifications Specification operating Temperature Range an PTOS p 5 ane 158 F 58 F 221 F Humidity Range 10 to 90 R H 10 to 90 R H y 5 Non Condensing Non Condensing Power Requirements This device is a high power USB device It must be plugged directly into a USB port on your computer or a self powered hub capable of supplying 500 mA per port Some laptop computers running on battery power and non p
19. owered USB hubs do not provide the full 500mA necessary to power this device Manufacturing All 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 Sealevel Systems Inc 12 lt SeaLINK 4 SC User Manual Appendix A Troubleshooting The adapter should provide years of trouble free service However in the event that it appears to be functioning incorrectly the following tips can eliminate most common problems without the need to call Technical Support l Ensure that the Sealevel Systems SeaCOM software has been installed on the machine so that the necessary files are in place to complete the installation To confirm installation click on the Windows Start button and then select All Programs You should see the SeaCOM program folder listed Note The SeaCOM driver must be installed before the adapter is connected to your computer Check to make sure that USB support is enabled and functioning properly in the operating system The presence of the Universal Serial Bus controllers listing in Device Manager will confirm that USB support is enabled in Windows 98 ME 2000 XP or Vista operating systems While Device Manager is open locate the COM ports described under Verifying Installation in the Installation and Configuration section of this manual
20. puters Once the SeaCOM software driver has been installed on target computers the 2423 can easily be moved from one computer to another without having to configure the electrical interface at each computer Sealevel Systems Inc i s SeaLINK 4 SC User Manual Interface Biasing 1K ohm pull up pull down combination resistors bias the receiver inputs and are handled automatically for each mode The pull up PU and pull down PD resistor settings are shown in the table below PU Setting PD Setting RS 232 Always Off Always Off RS 422 Always Off Always Off RS 485 Always On Always On Line Termination A 120 ohm resistor is across each RS 422 485 input If multiple devices are configured in an RS 485 network only the devices on each end should have the termination in place Termination configuration is software selectable for both full and half duplex RS 485 By default line termination is disabled and this configuration can be set by placing a check next to Enable Termination in the RS 485 Advanced Configuration field as shown in the image below Seal INK 8M 5C USB to Serial Port COM3 Properties x General Port Settings Interface Settings Driver Details y SeaLINK 8M SC USE to Serial Port COM3 i Interface AS 485 AS 4 65 Advanced Configuration M Enable Termination Enable Echo Sealevel Systems Inc 8 SeaLINK 4 SC User Manual Echo The RS 485
21. r icon on your desktop or in the Start menu Click on Properties in the fly out menu to launch the System Properties window Click on the Hardware tab and then click on the Device Manager button When Device Manager launches look under Ports COM amp LPT to verify that the serial ports have been correctly installed screen shot for 2833 shown Note Your system will assign the next available COM numbers which may vary for each computer used The Port Manager utility included with SeaCOM can be useful in reassigning COM numbers E Device Manager File Action View Help c gt 1 S 285 2 SO Esc ALEVEL 0C4795 a 4 Computer E Disk drives 1 Display adapters vA DYDICO ROM drives 4 Floppy disk controllers 4 Floppy disk drives 4 IDE ATAJATAPI controllers a Keyboards bi y Mice and other pointing devices ne E Monitors 5 0 Multi port serial adapters g Network adapters rA Ports COM amp LPT jee A Communications Pork COM f F Communications Pork COME co ECP Printer Port LPT1 o 7 SealINk 8M SC USB to Serial Pork COMO A SeaLINK 8M SC USB to Serial Pork COM S5eaLINK 8M 5C USB to Serial Pork C0M4 SeaLINK 8M SC USB to Serial Pork COMS SeaLINkK 8M 5C USB to Serial Pork COME 5eaLINK 8M 5C USB to Serial Pork COMP e y S5eaLIMNK 8M 5C USB to Serial Pork COMS e SeaLINkK 8M SC USB to Serial Pork COM9 E ee Processors E ES SCSI and RAID controllers E d Soun
22. 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 18 SeaLINK 4 SC User Manual Appendix E Silk Screen 2423 NI SS NI SL8 NI OSL NI 802 NI OSTO NI SL O NI GZL Je ewWDIG SOH m s Huizunow NI 002 O NI 0 2 NI 00 2 E eal a le E Os Ss L a ota 60 80 a 90 sg 0 ca Oo O o EEIE 55 Oo Ooo Oo E O O O O d S 8d OO 69140 O A y 00 91410 O 4 391310 O s9140 O 5 vola eke 912j0 O in b NI 290 s a 43913 h gtu 6S14 ade gsia Sly 9siy sy 0 00 oo 56 eSlug zSldg piste 22928 o E i omli g Yo o 2 go NI 0580 de r A M o cjm jm m 1 911 Sila BST ooont cues Sf l nE ao mW wy 020000 7 o SHOU UON i sis u ubg LA Y SHOy E 601 mm J S O a rime E E ww o 40ta Lm s e YSN NI 30VW 19 _ S mu r a gpn Sotoa m ma 9p m 80 9912 n vLLO cen LOZ LHOINAdOD ipi vy ie cria 20108 mm gr Co sa oe E lo 3 Gtp es mile ss mm Ju s 221 ees anaes 5 E ats Bese EUS iea all ahs ae i 2 2 J DD m Fa ww 9 iy mej jamm macei en jam LELO am jam so mo s SUBEN een By ONON IN SSSSSs Len vn 6En peas pd Ate a oa PET us gen saaan
23. rol as pictured below COM3 Properties a Ed Port Settings Bits per second Data bits Parity Stop bits Flow control Restore Defaults coca oooh Click Apply and Ok Sealevel Systems Inc 14 SeaLINK 4 SC User Manual Select the BERT tab and with the loopback connected to the port you wish to test click on the Start button If testing RS 485 be sure that ECHO is enabled Pictured below WinSSD COM3 9600 8 N 1 None Port Information Loopback BERT Terminal Bit Error Rate Test Transmit Frames Receive Frames Bytes Checked Bit Errors Sune Losses Tx Data Rate As Data Rate Sine Status Test Time 000 00 00 If the COM port is working properly the green light will glow and the Transmit Frames and Receive Frames will increase The Tx and Rx Data O j 1 j 0 0 bps 0 bps Mo Data 000 Out Toggle ATS Toggle DTR CTS DSR RI DCD Exit Hep Rates will show the calculated data rate Pictured below C WinSSD COM 9600 8 N 1 None Port Information Loopback BERT Terminal Bit Error Rate Test Transmit Frames Receiwe Framez Bytes Checked Bit Errors Syne Losses Tx Data Rate Rs Data Rate Sync Status Test Time 000 00 15 You can continue testing this port with different configurations or 0 S600 bps S600 bps Reset Stats proceed with testing other ports if necessary
24. the 2423 plug the device into an available USB port using the supplied USB cable The following instructions were tested with Windows XP and may vary based on your version of Windows Once the device has been connected the Found New Hardware wizard will appear first for the root hub and then for each port that you are installing Follow the instructions on the following page to finish installation The installation will repeat twice for each COM port a total of 8 times on four port devices This is a limitation in the way Windows installs external serial devices 1 Click on Install the software automatically followed by the Next button 2 Windows will show a warning message that the hardware has not passed Windows logo testing Click on Continue Anyway 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 3 Click on Finish Repeat this process for the remaining ports on the 2423 Sealevel Systems Inc 25s SeaLINK 4 SC User Manual Verifying Installation To confirm that the ports have been successfully installed you can look in Device Manager under Ports COM amp LPT and each of the ports you installed will be included on the list with their associated COM numbers To access Device Manager follow the steps below l Za A Right click on the My Compute
25. uits 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 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 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 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
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