SeaIO USB Serial Modules User Manual
Contents
1. 222000000000000000000000000000000000000000000000000000000000000000000000 22 APPENDIX F COMPLIANCE NOTICES 2200000000000000000000000000000000000000000000000000000000000000 23 APPENDIX F COMPLIANCE NOTICES 2220000000000000000000000000000000000000000000000000000000000000 23 WARRANTY iia Aita 24 O Sealevel Systems Inc Seal O USB Serial User Manual SL9177 Revision 2 2007 Introduction Seal O USB serial expansion modules provide an easy way to add RS 232 or RS 485 serial ports to a Relio industrial computer SeaPAC touchscreen computer stack of Seal O modules or anywhere serial devices need to be connected via an available USB port Available in four and eight port models the serial ports appear as standard COM ports to the host system enabling compatibility with legacy software Seal O USB serial modules support data rates to 921 6K bps and are designed with a state machine architecture that greatly reduces the host CPU overhead when communicating over multiple ports simultaneously Status LEDs integrated into the RJ45 connectors display transmit and receive data activity With the unique VersaCom multi interface connector design both RS 232 and two wire RS 485 signals are always present and active on the RJ45 serial connectors Simply select the appropriate pin out for RS 232 or two wire RS 485 on each individual port There are no internal jumpers or switches to set so field installation and service is e2. sizing Communicating Via Modbus Commands Sealevel Seal O modules are designed to integrate seamlessly into existing Modbus networks The supported command set will vary depending on the Seal O model used While Seal O USB serial expansion modules do not require any Modbus commands to operate they do pass through all Modbus RTU commands to other connected Seal O modules and Modbus compliant devices The Seal O Modules manual SealO Modules pdf located in the Manuals subfolder on the Sealevel Software CD covers digital and analog I O modules and details the supported Modbus command set The official Modbus specification can be found at www modbus org Sealevel Systems Inc 2 Seal O USB Serial User Manual Before You Get Started What s Included All Seal O USB serial expansion modules are shipped with the following items If any of these items is missing or damaged please contact Sealevel for replacement u Seal O USB Serial Expansion Module one of the following models o Seal 0 641U 4 Port RS 232 RJ45 Serial Interface o Seal O 647U 4 Port RS 232 RS 485 RJ45 VersaCom Serial Interface o Seal O 681U 8 Port RS 232 RJ45 Serial Interface o Seal O 687U 8 Port RS 232 RS 485 RJ45 VersaCom Serial Interface temf CA179 72 USB A to B Device Cable Itemf LB116 RS 232 RJ45 Serial Loopback Item LB115 RS 485 RJ45 Serial Loopback only VersaCom models u Sealevel Software C
3. 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 line 5 to 8 Data Bits Un sed Romanae or I 1 1 17777177177071 T3 PO t Ier ISTO 0 aja ze e Sd a s o OL I tf e 1 15 4 he 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 rate and communication parameters for asynchronous communications have to be the same at both the transmitting and receiving ends The communication parameters are baud rate parity number of data bits per character and stop bits i e 9600 N 8 1 Sealevel Systems Inc 21 Seal O USB Serial User
4. If the Seal O USB serial expansion module will be used alone the recommended single unit power supply Item TR112 rated at 24VDC 250mA is a perfect fit Skip ahead to the Software Installation chapter of this manual One of the primary features of Seal O modules is their ability to be powered from a single input source which is then shared with other Seal O expansion modules via pass through connectors or screw terminals located on the left side of the modules If you re connecting multiple Seal O modules together refer to the rest of this chapter for power supply sizing considerations Seal O Expansion Power Connection Each Seal O product including the expansion modules contains an onboard switching regulator power supply rated for 9 30VDC For local installations less than 10 apart expansion module power is usually supplied from the Base module via the pass through connectors The number of expansion modules that can be driven from the Base module depends on the power source and number type of expansion modules Refer to the chart below for power requirements For expansion modules mounted remotely greater than 10 apart separate power is required at each expansion module Seal O Expansion Power Requirements The following table shows the maximum power requirements for each Seal O digital and analog expansion module Model Number Max Power Seal O 410N 1 4W Seal O 420N 2 0W Seal O 430N 0 4W Seal O 440N 2 5W Seal
5. Manual Appendix E PCB Silk Screen INI o F F az Cd eso zsiy O ISLY OSIY Sri griy cris ori Srlu pri TO Cris LL Oriy 6C18 cia cs ze Zd ld ti cdi Zd ld 64 84 3 94 sera Pela cela AM LELY clya 62148 Lzia F 9ziu g seis E rzia U czia g zzia F iza g ezia A 6118 L t SILY L t zn Lilu cu 9zn orny a szn 6018 Sua vzn 801 czn cos SHY zzn 9018 tte tzn SOly do ezn 843 o 929 sz vo L9 uo 149 zela 1018 0013 664 868 68 a cory 040 699 899 199 999 599 90 299 199 093 659 859 4S3 953 3 eso zso 159 eso 69 80 99 SH ow evo 0 13 00 n n n n n vin n n eco uo 909 sco vos eco zea 192 seu ceu 68 z6u teu seu 063 seu Lee seu YSN NI 30vW pau vey cay SHOY UON 844 Ls y Ba ER 900Z LHOINAdOO sa tu qu td 193 tin cou 9 A3H 08Z 994 ein z9 sou vou es Sy gru seo Seu zou o 6cu 96 Seu 6vu vy va tru Cru wa ery gt EEN sz sz sz seu sz Zo zo zo si z2 gt v L 83 ea 83 a 283 es 183 628 Seu gz sza 28 cza 9z o o amp 6 o 8 o gi 0 i 124 A oz i 61 t Si 1 LJ o E DODOABO Ed WOWOWJO O DONO DPOVDOAAOD m e vw mw oaoa q 8288888 o m CVGR Seal O USB Serial User Manual 200 Sealevel Systems Inc Appendix F Compliance Notices Federal Communications Commission Statement C 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 de
6. Pin Assignments RJ45 RS 232 The Seal O 641U and 681U utilize the RS 232 connector pin out Integrated status LEDs on each RJ45 serial port display transmit and receive data activity NC No Connect O IS RTS Request To Send 2 Output TX TransmitData 3 Output GND Ground pad po PWR Power Output O5 4 RX__ ReceiveData_____ 6 hpm CTS Clear To Send NC No Connect NOTE DCD DSR and RI are inputs that are not brought out on the RJ45 connector DSR and DCD are biased active and RI is biased A inactive RS 232 am m e gin a M M Sealevel Systems Inc 10 Seal O USB Serial User Manual Connector Pin Assignments RJ45 RS 232 485 VersaCom The Seal O 647U and 687U utilize the RS 232 485 VersaCom connector pin out Integrated status LEDs on each RJ45 serial port display transmit and receive data activity Name Pink Mode D ___ RS 485 Data o RTS Request To Send TX Transmit Data 13 Output GND Ground 4 ka PWR_ Power Output 5 RX__ ReceiveData 6 Imput De RS ARS Dats 8 NOTE DCD DSR and RI are inputs that are not brought out on the RJ45 connector DSR and DCD are biased active and RI is biased DA inactive R5 232 RS 485 a R SEELE 8 Bs noq a AS Sa S 28 U w OU 1 Interface Selection With the unique VersaCom multi interface connector design both RS 232 and two wire RS 485 signals are al
7. required use high quality shielded cabling to maintain compliance with FCC EMC directives Sealevel Systems Inc 23 Seal O USB Serial 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 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 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 NOTE Return authorization must be obtained from Sealevel Systems before returned merchandise will be accepted Authorization is A obtained by calling Sealevel Systems and requesting a Retur
8. AC to 24VDC 36W 1 5A Desktop Power Supply with 1 3mm Plug requires IEC country specific Power Cord Sealevel Systems Inc 16 Seal O USB Serial User Manual Mounting Options KT122 Expansion amp Strap Kit Includes 5 RS 485 Interconnect Cable item CA239 four metal straps and four 4 40 metal screws for connecting two Seal O modules together in a stack KT123 Flush Mount Bracket Kit Includes two metal brackets and four 4 40 metal screws for mounting Seal O modules or stacks in a variety of positions and locations KT125 Universal Mounting Bracket Includes metal mounting bracket and four 4 40 metal screws for mounting devices to Seal O modules or mounting Seal O modules to VESA mounts and other devices DR104 DIN Rail Mounting Assembly Connects to the back edge of Seal O modules to facilitate an easy DIN rail mounting option and a cleaner installation RKIU 1U 19 Rack Tray RK2U 2U 19 Rack Tray RK CLAMP Securely holds Seal O modules to rack trays Cabling Options CA239 5 CAT5 RS 485 Interconnect Cable used to connect Seal O modules together in a stack included in 4xxN Seal O expansion modules CA246 7 Blue Ethernet Patch Cable Can be used to connect Seal O Ethernet modules to a hub included with 4xxE Seal O Ethernet modules Can be used to connect Seal O RS 232 modules to both Sealevel and standard RS 232 serial ports included with 4xxS Seal O RS 232 modules as
9. D includes SeaMAX software and PDF manuals Each Seal O module is shipped with 4 adhesive rubber feet that can be attached to the bottom of the enclosure to enhance the stability in table mount applications Power Supplies Seal O USB serial expansion modules are powered from your 9 30VDC source or from a variety of Sealevel power supply options Refer to the Power Options chapter of this manual for power supply sizing considerations when powering multiple Seal O modules Loopback Adapters AII Seal O USB serial expansion modules include an RJ45 RS 232 serial loopback adapter Item LB116 that is useful for testing the data signals on RS 232 ports Seal O USB serial models with RS 485 VersaCom ports also include an RJ45 RS 485 loopback cable Item LB115 that is useful for testing the data signals between a pair of RS 485 ports WinSSD is a full featured asynchronous serial diagnostic utility for Windows that allows you to modify default parameters perform loopback tests toggle modem control signals and transmit test pattern messages WinSSD can be found on the Sealevel Software CD in the Software Utilities WinSSD subfolder Sealevel Systems Inc 3 Seal O USB Serial User Manual Hardware Description Seal O RS 232 Serial Expansion Modules Models u Seal 0 641U USB to 4 Port RS 232 RJ45 Serial Interface u Seal O 681U USB to 8 Port RS 232 RJ45 Serial Interface Features Utilizes high speed UARTs with 128 byte T
10. Inc 14 Seal O USB Serial User Manual Mounting Options Seal O Mounting Kit Expanding your I O count is as simple as adding N Series expansion units to the Base Seal O module or other N series modules Each N Series module includes an expansion and strap kit Item KT122 which includes a 5 CATS interconnect cable four metal straps and four 4 40 metal screws The image shows a Seal O stack configuration using the expansion kit DIN Rail Mounting All Seal O modules are available with a factory installed DIN rail mounting clip Alternatively DIN rail mounting clips can be ordered as a field upgrade kit Item DR104 The bracket with clip is easily attached using two included 4 40 Phillips head machine screws Table Wall Mounting The flush mount bracket kit Item KT123 is extremely versatile and can be used to mount Seal O modules from the top bottom or back edge Individual modules or a stack of Seal O modules can be mounted flat to a tabletop underneath a counter or inside an enclosure The kit can be used to mount Seal O modules flat to a wall or along the back edge similar to DIN rail mounting options Universal Mounting Bracket The universal mounting bracket Item KT125 can be used as a backpack to mount power supplies and other devices to Seal O modules The bracket has holes for both 75mm and 100mm VESA mounting options The universal arrangement of slots and holes accept bolt sizes to M4 an
11. O 450N 3 8W Seal O 470N 1 5W Seal O 520N 3 5W Sealevel Systems Inc 5 Seal O USB Serial User Manual TTL Expansion Power Requirements The Seal O 462N and Seal O 463N use 74ABT245 octal bi directional transceivers to provide TTL input output capabilities and can sink 64mA and source 32mA Each bit is pulled to 5V through a 10K ohm pull up resistor to insure each bit is at a known state when not driven The supply current and maximum output power for the TTL expansion modules is shown in the table below Model Number Max Power Seal 0 462N 0 5W Seal 0 463N 0 5W Output Power 5VDC 1A SW Maximum Sample Power Calculation A typical application for Seal O products would use one Base module and several N series expansion modules in a local stack configuration In this arrangement with power applied to the Base module through either the DC jack or screw terminal connector and passed through to the expansion modules attention should be given to ensure the input power to all connected modules is adequate Example Power W Base Module Seal O 641U 1 5 Expansion 1 Seal O 410N 1 4 Expansion 2 Seal O 440N 25 5 4W Power Required In this application the Sealevel Item TR112 wall wart power supply is a good choice since it is low cost and supplies 24VDC 250mA 6W NOTE A complete listing of recommended power supplies is provided in A the Accessories chapter at the end of this manual Se
12. RS 485 signals and power from one module to the next For expansion modules that are less than ten feet from a base unit a standard RJ45 CATS patch cable may be used For Seal O modules greater than ten feet apart use twisted pair cable connecting the data lines to the screw terminals instead A recommendations NOTE Modules greater than ten feet apart must have separate power supplies Refer to the Power Options chapter of this manual for RJ45 RS 485 IN OUT Pass Thru Connector Sealevel Systems Inc 12 Pin Out Pin Signal 8 Common GND Seal O USB Serial User Manual RS 485 Biasing and Termination All RJ45 RS 485 inputs have the appropriate biasing to keep them in an inactive state when not connected to a cable When cabling for RS 232 signals be sure to leave the RS 485 pins unconnected If the unused interface pins are connected to a cable the outputs will attempt to drive the lines while the inputs will attempt to interpret any voltage on the line as data which can limit cable length and may result in communication failures 120Q termination resistor always present between Data and Data 5100 Biasing pull up resistors on Data 5100 Biasing pull down resistors on Data NOTE RS 485 networks should have termination enabled on each end of the network Seal O USB serial modules have appropriate biasing A and termination enabled Pull up and pull down resistors should a
13. Seal O USB Serial User Manual SEALEVEL SYSTEMS INCORPORATED www sealevel com PO Box 830 Liberty SC 29657 864 843 4343 Table of Contents INTRODUCTION sicscsecceccccccsccceccccessccscsdescdsacessdisccdsscdsctesscosecdeselsscssscccsccsscdecassddesecdesedescessddescdeccdees 1 SEAT O HARDWARE OVERVIEW ccccccccccscccscscsscsssscscccsscscssesssssssssssssssssssssscsssssssscsscscsoes 2 BEFORE YOU GET STARTED 0 ccccccscscscscscscscscscscscscscscsccccccccscscccscccscscsescccccccccsescccscseseees 3 WHAT SINGLE UDED ESA E o e es NE ed teva OOO e ada dee 3 HARDWARE DESCRIPTION cccccccssssssssssscsssssssssccssccsccssccssccsscecesesesesecesscesesesssesssossseseses 4 SEAI O RS 232 SERIAL EXPANSION MODULES c cccccssssssceccccccccssessssccccsscsssessescescesessuenenseeees 4 SEAI O RS 232 485 VERSACOM SERIAL EXPANSION MODULES ccccccccccccsssssssecsccccccesenseseeees 4 POWER OPTIONS ssccvcsscccssccascecccsccceseccsscdcscssadssecdescessossscesscosscecocsssdesoccescescessdceseccbocccecdssdedoacesseses 5 SOFTWARE INSTALLATION cccccccccsccscsccccccsccsscccsscsscccscccssccssscccsssscesesesscscesesesosesosscoseces 7 PHYSICAL INSTALLATION ccccccscscscscssscssscscssscsccccscccccscscccccscscscscscscccscccccscscsescsesescsesesees 8 TECHNICAL DESCRIDPTION ccccccccscsssssssssssssssssccsssssscscsssccccsscssccscsssssssesesscscesesesscssssssoses 9 COMMON EFATURESS c AAA dh dante t E Reco ra
14. alevel Systems Inc 6 Seal O USB Serial User Manual Software Installation SeaMAX Software Installation Proceed with installing the SeaMAX Software Suite using the software CD that was included with your Seal O serial expansion module Software drivers are also available on the product webpage on the Sealevel website at www sealevel com Windows 98 ME 2000 XP Installation Do not connect the Seal O module to the host until the software is installed 1 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 harm to your system During setup you may specify installation directories and other preferr
15. asy The USB serial modules are powered from your 9 30VDC source or your choice from several Sealevel power supply options For conveniently powering serial peripherals the supplied power is fused and connected to pin 5 on each of the RJ45 serial connectors A high retention USB type B connector helps to prevent accidental disconnection of the USB cable An RS 485 pass through connector on the side of the Seal O USB serial modules provides additional I O capabilities using Seal O N series expansion modules Up to 246 additional Seal O expansion modules can be added and are available with Reed and Form C relays optically isolated inputs TTL interfaces A D and D A functionality This manual covers the installation and operation of these Seal O products OEA AO USB Serial Expansion Modules Seal O 641U 4 Port RS 232 RJ45 Serial Interface Seal O 647U 4 Port RS 232 RS 485 RJ45 VersaCom Serial Interface Seal O 681U 8 Port RS 232 RJ45 Serial Interface Seal O 687U 8 Port RS 232 RS 485 RJ45 VersaCom Serial Interface O Sealevel Systems Inc 1 Seal O USB Serial User Manual Seal O Hardware Overview Seal O Base and Expansion Modules In general Seal O data acquisition modules provide powerful digital analog and serial expansion to any host computer Multiple modules can be daisy chained using convenient pass through connectors to create a versatile distributed control and monitoring network For ease of installati
16. d can be used for virtually any mounting configuration Sealevel Systems Inc 15 Seal O USB Serial User Manual Accessories Depending upon your application you are likely to find one or more of the following items useful for interfacing Seal O serial expansion modules All items can be purchased from our website http www sealevel com or by calling 864 843 4343 Power Supplies US Options TR112 120VAC to 24VDC 250mA Wall Wart Power Supply with 1 3mm Plug for single Seal O module TR109 120VAC to 24VDC 500mA Wall Wart Power Supply with 1 3mm Plug for multiple Seal O modules TR108 US 100 250VAC to 24VDC 36W 1 5A Desktop Power Supply with 1 3mm Plug includes CA248 Nema 5 15P 6 US Power Cord PS101 100 240VAC to 24VDC 7 5W 300mA DIN Rail Mount Power Supply connects via screw terminals no wire included PS103 100 240VAC to 24VDC 50W 2 1A DIN Rail Mount Power Supply connects via screw terminals no wire included International Options TR108 AU 100 250VAC to 24VDC 36W 1 5A Desktop Power Supply with 1 3mm Plug includes CA187 AS 3112 6 Australian Power Cord TR108 EC 100 250VAC to 24VDC 36W 1 5A Desktop Power Supply with 1 3mm Plug includes CA188 Schuko 6 Continental European Power Cord TR108 UK 100 250VAC to 24VDC 36W 1 5A Desktop Power Supply with 1 3mm Plug includes CA189 BS 1363 6 UK Power Cord TR108 100 250V
17. da 9 USB INTERFACE LED e La ada o PNA ne loo 9 CONNECTOR PIN ASSIGNMENTS RJ45 RS 232 cccccccccsssscccsessececeesseceeecseseeecsssseeeeseeesaeeeenes 10 CONNECTOR PIN ASSIGNMENTS RJ45 RS 232 485 VERSACOM sseeuuaaa ooo ozna aoc ezaaaa nace 11 INTERFACE SELECTION total 11 SEAI O PASS THROUGH CONNECTOR w cccssssssseccccccccsesssssscecccsssesusssssesccessseuuueasecescesseeuuneuenesses 12 RS 485 BIASING AND TERMINATION cccccssececcccsecececssceccassceccasesecccusssecceausecccauesecceaaesseceaes 13 POWER ON PIN Detras zd wid cada Also A E E cde dota 13 OPTIONAL RJ45 TO DB9 RS 232 ADAPTER cccccccccccccsssssssceccceccesssssecscccccssuesesssesccsssessunensnenses 14 PRODUCT 0352012 07 WU ONCE 14 MOUNTING OPTIONS soso000000000000000000000000000000000 0000000000 0000000000 aeee acesas aeee aces wo ao wo tsoen oise 15 ACCESSORIES acc cosseciscesstetseseociascess tous couistackeascsceecucsdsscerscesSucessduescovcscesbeascubseceuscsececccwesbasees 16 APPENDIX A TROUBLESHOOTING 222222020220200000000000000000000000000000000000000000000000000000000 18 APPENDIX B HOW TO GET ASSISTANCE cccccscscscscscscscscscscscscscscccccccccccscccccccscseseees 19 APPENDIX C ELECTRICAL INTERFACE 2222222222000000000000000000000000000000000000000000000000 20 APPENDIX D ASYNCHRONOUS COMMUNICATIONS 2 2 2 2000000000000000000000000000000 21 APPENDIX E PCB SILK SCREEN
18. ed 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 Seal O USB serial expansion module NOTE Windows NT is not USB aware and thus cannot support this device O Sealevel Systems Inc 7 Seal O USB Serial User Manual Physical Installation Seal O USB serial expansion modules can be connected to any spare USB port Do not connect the Seal O module to the host until the software is installed 1 Connect the Seal O USB serial expansion module to your 9 30VDC source or optional Sealevel power supply Refer to the Power Options chapter of this manual for power requirements Connect the Seal O USB serial expansion module to a USB port with the supplied USB device cable The software drivers installed during setup will automatically recognize and configure the device You should see one or more New Hardware Found windows indicating the actual device being created Next view your system s Device Manager You should have new COM ports in the Ports COM amp LPT Device Class indicating the installation was successful You can access your new COM port by using the assigned COM identifier This assignment will vary from system to system To verify operat
19. ed and ready to run diagnostics Sealevel Systems maintains a website on the Internet Our homepage address is http www sealevel com The latest software updates and newest manuals are available via our FTP site that can be accessed from our home page Manuals and software can also be downloaded from the product page for your device Sealevel Systems provides an FAQ section on our website Please refer to this to answer many common questions This section can be found at http www sealevel com faq asp Technical support is available Monday to Friday from 8 00 a m to 5 00 p m eastern time You can contact Technical Support via Phone 864 843 4343 Email 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 Sealevel Systems Inc 19 Seal O USB Serial User Manual Appendix C Electrical Interface RS 232 RS 485 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 betwee
20. 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 Inc 20 Seal O USB Serial 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 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 starting bit followed by a pre defined number of data bits 5 6
21. ion use Sealevel Systems supplied WinSSD diagnostic utility WinSSD can be found on the Sealevel Software CD in the Software Utilities WinSSD subfolder Your Seal O serial expansion module is now ready for use Sealevel Systems Inc 8 Seal O USB Serial User Manual Technical Description The Seal O USB serial expansion modules utilize USB UARTs These chips feature programmable baud rate data format 128 byte Dual Port TX Buffer and 384 byte Dual Port RX Buffer The transceivers support data rates up to 921 6K bps and integrated status LEDs on each RJ45 serial port display transmit and receive data activity Common Features All Seal O USB serial expansion modules include the same connectors on the left side RJ45 RS 485 pass through connector 1 3mm 9 30VDC barrel connector and a 6 position removable screw terminal Easily daisy chain digital amp analog I O modules with convenient Selectable 2 wire RS 485 pass through connector power inputs connection IR oO m gt o s GND RS 485 RS 485 GND SHIELD USB Interface amp LED A high retention USB Type B connector helps to prevent accidental disconnection of the USB cable A green status LED next to the USB connector labeled PWR lights to indicate the module is properly connected to an input power source Seal 0 gt 4 Port USB Serial Adapter USB Sealevel Systems Inc 9 Seal O USB Serial User Manual Connector
22. lso be enabled on the last device on the RS 485 network Power on Pin 5 For conveniently powering serial peripherals the input power is fused and connected to pin 5 on each of the RJ45 serial connectors Each serial port utilizes an auto resetting fuse rated at 500mA All powered serial peripherals must have the same input voltage and be within the 9 30VDC range The input current must be rated higher than the combined current requirement of the Seal O USB serial expansion module and any devices powered by the serial ports and the RS 485 pass through connector Sealevel Systems Inc 13 Seal O USB Serial User Manual Optional RJ45 to DB9 RS 232 Adapter Preconfigured for use with Sealevel USB RJ45 enabled serial adapters the RJ45 to DB9 modular adapter item RJ9P 232 converts the RJ45 RS 232 pin out to a DBO male RS 232 serial port Standard CATS patch cables can be used to extend the serial port up to 50 feet away from the RJ45 port The pin out for the RJ9P 232 is shown below Product Specifications Temperature Range Operating 0 C 70 C Storage 50 C 105 C Dimensions Length Width Height 7 5 5 1 1 3 19 05 cm 12 95 cm 3 30 cm 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
23. n 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 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 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 Sealevel Systems Inc 24 Seal O USB Serial User Manual
24. n 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 SeaLINK 4 VC is a DTE device 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
25. on multiple modules can be combined in a local stack or separated up to 4000 feet using the RS 485 expansion interface The first Seal O module connected to the host computer is considered the Base module and connects to the host via one of the following interfaces u E Series Ethernet Modbus TCP u U Series USB Modbus RTU u M Series RS 485 Modbus RTU u S Series RS 232 Modbus RTU Seal O USB serial expansion modules only connect to the host via USB and will operate as a Base module when connected to digital and analog Seal O N series Expansion Modules After the Base unit is installed up to 246 additional Seal O N Series expansion modules can be added to create an I O network These expansion modules interface via RS 485 and can be located local to the Base Seal O module or remotely located up to 4000 feet away Local installations lt 10 of cabling should use the 5 CATS RS 485 pass through cable Item CA239 included with each N series module to connect together two or more modules Remote expansion modules gt 10 of cabling should use twisted pair wiring connected via the removable screw terminal connectors For local installations power to the expansion modules is supplied from the base module via the pass through connectors For remote devices separate power is required at each expansion module Refer to the Power Options chapter of this manual for more information on Seal O power requirements and power supply
26. part of p n KT119 Optionally it can be used as an RS 485 interconnect cable to cascade additional Seal O modules via the RS 485 In Out ports on the side of Seal O modules CA247 10 Blue Ethernet Patch Cable Can be used to connect Seal O Ethernet modules to a hub or can be used as an RS 485 interconnect cable to cascade Seal O modules via the RS 485 In Out ports CA179 USB 6 A to B Cable included with Seal O USB modules Sealevel Systems Inc 17 Seal O USB Serial User Manual Appendix A Troubleshooting Sealevel includes diagnostic utilities with Sealevel products to assist with troubleshooting procedures Using the diagnostic software and following these simple steps can eliminate most common problems without the need to call Technical Support 1 Read this manual thoroughly before attempting to install the device in your system Uninstall any previous versions of SeaMAX software before installing any new versions Install SeaMAX software first Installing the software places the necessary files in the proper locations on your system After installing the software proceed with adding the hardware If your module isn t working at all first check to make sure that USB support is enabled in the System BIOS and it is functioning properly This can be done by using Device Manager and expanding Ports COM amp LPT Confirm that all screw terminal connections are correct and secure and that the correc
27. signed 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 user s 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 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 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 is
28. t cables and adapters are being used Verify that cables are using the proper pin out on both ends of the connection When Seal O serial expansion modules are configured properly Sealevel s WinSSD utility and a loopback plug can be used to verify serial communications You can make a simple Loopback in the field by connecting the TX and RX pins Details on loopback plugs are included within WinSSD WinSSD can be found on the Sealevel Software CD in the Software Utilities WinSSD subfolder When testing the serial connections in loopback mode using WinSSD you should see both the TD and RD echoed as data on the screen The loopback test first transmits a HEX pattern 55AA and then an ASCII string of data If this test passes then the serial expansion module is ready for use in your application Always use Sealevel diagnostic software utilities 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 is free and available from 8 00 AM to 5 00 PM Eastern Time Monday through Friday For email support contact support sealevel com Sealevel Systems Inc 18 Seal O USB Serial User Manual Appendix B How To Get Assistance When calling for technical assistance please have your user manual and current device settings ready If possible please have the device install
29. ways present and active on the RJ45 connectors Simply select the appropriate pin out for RS 232 or two wire RS 485 on each individual port The unused interface on each connector should be left unconnected All inputs have appropriate biasing to keep them in an inactive state If the unused interface pins are connected to a cable the outputs will attempt to drive the lines while the inputs will attempt to interpret any voltage on the line as data which can limit cable length and may result in communication failures Sealevel Systems Inc 11 Seal O USB Serial User Manual Seal O Pass Through Connector All Seal O USB serial expansion modules include an RS 485 pass through connector on the left side of the unit that is internally connected to the same pins on the removable screw terminals This offers two convenient options for adding Seal O digital and analog expansion modules The image on the following page shows the pass through connector and removable screw terminals For connecting several Seal O modules together in a stack all N series expansion modules ship with an expansion and strap kit item KT122 that includes four metal straps four 4 40 screws and a 5 RJ45 RS 485 interconnect cable item CA239 The metal straps allow you to securely connect multiple Seal O modules together The interconnect cable can be used to connect Seal O modules together via the RJ45 pass through connectors providing an easy method to cascade
30. x FIFOs and 384 byte Rx FIFOs Provides four or eight RJ45 RS 232 serial ports with Tx Rx status LEDs Integrates transmit and receive LED indicators on each port Input power via terminal block or barrel connector USB 1 1 compliant USB 2 0 compatible High retention USB type B connector prevents accidental disconnection of USB cable Power Requirements 9 30VDC 1 5W Seal O RS 232 485 VersaCom Serial Expansion Modules Models u Seal O 647U USB to 4 Port RS 232 485 RJ45 VersaCom Serial Interface u Seal O 687U USB to 8 Port RS 232 485 RJ45 VersaCom Serial Interface Features Utilizes high speed UARTs with 128 byte Tx FIFOs and 384 byte Rx FIFOs Provides four or eight RJ45 RS 232 serial ports with Tx Rx status LEDs Integrates transmit and receive LED indicators on each port VersaCom design allows RS 232 or two wire RS 485 selection via cabling on each individual port Input power via terminal block or barrel connector USB 1 1 compliant USB 2 0 compatible High retention USB type B connector prevents accidental disconnection of USB cable Power Requirements 9 30VDC 2 5W Sealevel Systems Inc 4 Seal O USB Serial User Manual Power Options All Seal O modules are powered from a 9 30VDC source using either the DC jack or screw terminals on the side of the unit Sealevel offers several power supply choices to make connection easy see Accessories chapter at the end of this manual
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