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DataBridge SDR User`s Manual

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2. 3 21 22 nee ien ERU GE He Ese 44 B 3 3 Voltage levels coincide 45 DataBridge SDR Electrical Specifications 47 C 1 Power requirements eese enses 47 C 1 1 Power receptacle pin configuration mean nenea ana enea 48 C 2 Serial communications sese 48 G3 cSGSl interface s oov ose ou edipi eiiis 48 DataBridge SDR Mechanical Specifications 49 D 1 Dimensions seci ido 49 D2 A tau ee einen 50 D 21 Desi cants inne ane aie se Aid ct en RE ait 50 DataBridge SDR U ser s M anual rev 1 2 Table Of Contents The Switch Closure Interlace 51 E 1 D6SCrIDtIOR x eee Ae RR Hi 51 Ee le EE 51 E 3 Switch Closure Interface Data Format 54 EA SAM ae 55 E PCB Component Locations nene aa 56 E 6 Bill of Materials csse 57 E 6 1 Switch Closure Interface Circuit Board 57 E 6 2 Switch Closure Interface Internal Cable Assemblies 57 E 6 3 Switch Closure Interface External Cable Assemblies 58 E Specifications voca see pP gerit resiste er gas 58 E 7 1 Power Requirements Aa 58 E 7 2 O 59 E 7 3 Switch sampling rate men enma nare 59 Getting Started 1 1 Overview The DataBridge Serial D ata Recorder SD R is designed to record serial data to a SCSI mass storage device using a M D D O S W indows compatible FAT file An intuitive three button user interface activ
3. C or press the Stop button 18 DataBridge SDR U ser s M anual rev 1 2 Configuration M enu Reference 4 2 Edit Messages To enter the Edit M essages submenu press 5 from the main menu The E dit M essages menu appears see Figure 4 2 Acumen Instruments Corporation DataBridge SDR firmware rev 1 2b interval 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 R LF message contents Qo 00 1 0Y Ur iS I9 IG O a ZZZZZZZZZZHA ZZZZZZZZZZO 2222222222 1 Edit message contents 2 Edit message parameters Q Return to main menu Enter choice 1 2 Q Figure 4 2 The Edit Messages submenu The items in the Edit M essages submenu perform like menu items 3 and 4 of the menu described in the U ser s M anual From the main menu see Figure 4 1 pressing 4 enables or disables all messages If you are using the message feature be sure the main menu displays messages are ON after menu item 4 To return to the M ain menu from the E dit M essages menu press Q 4 3 SCSI Drive Functions To enter the SCSI Drive Functions submenu press 6 from the M ain menu The SCSI Drive Functions menu appears see Figure 4 3 Acumen Instruments Corporation DataBridge SDR firmware rev 1 2b Select SCSI target ID ID 05 Set power on delay delay 00000015 seconds Set suspend parameters for Quantum hard drives OFF Perform REQUEST SENSE command Perform MODE SENSE command R
4. N T Explorer 3 2 3 Full storage media When the storage media s first valid partition is full DataBridge SDR returns to Stop M ode D ataBridge SDR ejects the disk if you are using removable media You can delete files on the target media using your computer or replace it then insert the media and press the record button and append data normally 3 2 4 Formatting the storage media If you have purchased media for use with a removable mass storage device or you are installing a new storage device you will need to format it using MS DOS Windows 95 98 Windows N T or another operating system that supports the FAT file system D ataBridge SDR supports only the FAT file system If your computer supports the N TFS FAT32 HPFS or other advanced file systems be sure your disk is formatted using conventional FAT 3 2 5 Partitions In some cases disks are partitioned to contain multiple virtual drives on a single disk Partitioning is often done to overcome the 2 gigabyte size limit in MS DOS and create multiple 2 gigabyte drives support multiple operating systems and file systems or make more efficient use of disk space by using a smaller cluster size 14 DataBridge SDR U ser s M anual rev 1 2 O perating D ataB ridge SDR FDISK EXE included with MS DOS and Windows 95 98 Disk Administrator included with Windows NT Norton Disk Doctor and Norton DiskE dit are useful tools for managing and analy
5. Serial Port Basics deasserting DTR or DSR may signal major events such as that power has not been applied RTS CTS handshaking and DTR DSR handshaking are both referred to as hardware handshaking Another form of handshaking XON XOFF or software handshaking requires that the receiver send a character Control S ASCII 19 to halt data transfer and another character Control Q ASCII 17 to resume transfer Although this method eliminates the need for the RTS CTS DTR or DSR signals it suffers from slow response time by the receiver and renders 2 characters of the 256 character ASCII set unusable At data transfer rates above 9600 bps it is important to employ handshaking wherever possible even when U ARTs with FIFO buffers are used Remember that at 115200 bps a 16 byte FIFO fills in only 1 3 milliseconds while many mass storage devices advertise average seek times of 20 30 milliseconds B 3 3 Voltage levels For noise immunity and long cable lengths RS 232 devices convert TTL CM O S level signals 0V logic zero 5V or 3 3V logic one to higher voltage bipolar signals For the TD and RD signal lines RS 232 devices use a voltage between 3V and 25V to transmit a one and a voltage between 3V and 25V to transmit a zero For the other signal lines RTS CTS etc RS 232 devices use 3V to 25V to assert the signal and 3V to 25V to deassert the signal These voltage levels are defined in the EIA TIA 232E specifica
6. can enable D ataBridge SD R s hardware handshaking on the jumper block Q have a question that is not in this FAQ How can find an answer A Call us write us or e mail us Your question may be one others have and are afraid to ask See Section 7 1 of the U ser s M anual for contact information 31 Service and Support 7 1 Contacting Acumen Instruments Corporation 7 1 1 Technical support Service and technical support can be reached between the hours of 9Am and 5PM Central Standard Time M onday through Friday Acumen Instruments Corporation can be reached at the following phone numbers 515 233 6560 voice 515 233 0078 fax 7 1 2 Mail Acumen Instruments Corporation can be reached by mail at Acumen Instruments Corporation 209 S Fifth Street 2 Ames IA 50010 6848 USA 33 Service and Support DataBridge SDR User s M anual rev 1 2 7 1 3 E mail Acumen Instruments Corporation can be reached via e mail at info acumeninstruments com 7 1 4 World Wide Web Acumen Instruments C orporation maintains a web site which contains product information and downloads http www acumeninstruments com 7 2 Returning Equipment Before returning equipment to Acumen Instruments C orporation please call for an RMA number and shipping information This allows us to plan for your shipment in order to provide the best possible service When returning equipment please include a note indicating the symptoms of
7. environment For harsh environments an appropriate power supply should be used D 2 1 Desiccant When used with removable recording media the interior of the D ataB ridge SDR enclosure may be exposed to humidity when the front panel is removed to access the media To avoid condensation inside the enclosure the use of desiccants is recommended in humid environments A desiccant s effectiveness will vary depending on the number of times the front panel is removed and the relative humidity in the when the front panel is removed M onitor the humidity inside the enclosure with a disposable humidity indicator and change desiccant as needed A wide range of desiccant products are available from United Desiccants 101 Christine Drive Rio Grande Industrial Park Belen NM 87002 800 989 DESI 505 864 6691 505 864 9296 FAX H umidity indicators are available from Humidial Corporation 926 So 8th Street PO Box 610 Colton CA 92324 0610 909 825 1793 800 966 1793 909 825 6271 FAX 50 The Switch Closure Interface E 1 Description The Switch Closure Interface SwCI is designed to provide an electrically isolated and buffered interface to the DataBridge SDR A DataBridge SDR equipped with the SwCI will timestamp and log switch openings and closings The SwCI can monitor up to sixteen switch inputs organized as two 8 switch ports D ataBridge SD R when equipped with an SwCI has two additional AM P CP
8. guide to DataBridge SDR A 2 1 4 Deploying DataBridge GUDD 3 1 4 1 Connecting the power supply and serial cables to your data Cl TEE 3 Locating your computer s serial port 4 1 4 2 Communications software 5 Configuring DataBridge SDR ENEE 2 1 Setting date and me 8 2 2 Setting data port baud rate 9 2 3 Data port handshaking AA 9 2 4 Specifying a filename A 9 Notes about filenames eese 10 2 5 Entering Messages sonis nenea eee nennen nennen nennen nennen nennen 10 Setting message parameters men nenea nana ana 11 2 6 Testing your configuration uersessneensnnnnernnnnnerennnnnenennnnnnnnnnnen nennen ern 12 Operating DataBridge SDR een 13 3 1 STOP MO O ruina e di edt 13 3 2 ae aa O 13 3 2 4 MAANGA me einen Ba 14 3 2 2 Power failure and improper shutdowns manere 14 3 2 3 Full Storage media 5 nete a ke er 14 3 2 4 Formatting the storage media 14 3 2 5 Partidas 14 3 2 6 Considerations for slow devices nenea eee 15 3 3 Play mode iei lies 16 3 4 X Real time clock considerations AA 16 Configuration Menu Heierence nennen 17 4 1 Main Men Rte Sit cene a 17 4 2 Edit Me854a9g68 un u ae een een 19 4 3 SCSI DriveEunctions ri re hee T REC ERE 19 4 4 File System F nctions coin tecti trece est eet a 21 DIP Switch Heterenbb ics ot i stos 25 5 1 Overview sti 25 5 1 1 Enabling data port handshaking s
9. off 4800 bps on on on 2400 bps Table 5 1 DIP switch settings 27 Troubleshooting 6 1 Frequently Asked Questions FAQ Q When press the Record or Play button while in Stop M ode the indicators don t seem to respond quickly What s wrong A The Record and Play indicators only glow once data recording or playback has begun Slow media disk fragmentation or opening a large existing file all require more preparation time before recording or playback can begin Asa rule wait until the Record or Play indicator glows before transmitting data or expecting to observe serial output If the Record or Play indicator doesn t glow after ten seconds the disk may be full or may be experiencing a hardware problem Reset D ataBridge SDR by removing and reapplying power to see if it successfully enters Record or Play mode If not check the disk for available space or media errors using a computer 29 T roubleshooting DataBridge SDR U ser s M anual rev 1 2 Q Why does the Record indicator blink when D ataBridge SDR is in Record mode A DataBridge SDR shuts off the record indicator momentarily while it allocates disk clusters and updates directory entries This blinking is normal behavior intended to be used as a diagnostic tool and gauge of disk performance and data volume Q When press the Record button D ataBridge SDR ejects my Zip disk Why A DataBridge SDR ejects removable media
10. opened the file the record indicator glows and DataBridge SDR enters Record mode Once in Record mode DataBridge SDR transmits the messages stored in nonvolatile memory at the specified intervals to the data source connected to its data port 15 SDR O perating D ataBridge SDR DataBridge SDR U ser s M anual rev 1 2 If your storage media was included with DataBridge SDR it is already formatted properly M ost preformatted media such as Zip and J az disks is also ready for use 3 2 1 Receiving data Incoming data is appended to the open file as it is received until you press the Stop button D ataBridge SDR then closes the file updates its directory entry recording file size date and time and returns to Stop mode The data indicator found on D ataBridge SD R s front panel see Figure 1 1 flashes when the data source transmits data This indicator is useful to ensure that D ataB ridge SDR is actually receiving data via the data port 3 2 2 Power failure and improper shutdowns If DataBridge SDR loses power while in Record mode it returns to Record mode after power is restored For troubleshooting this feature is disabled by setting switch 8 to the on position see Table 5 1 An improper shutdown may result in loss of data due to sector buffering and caching in the storage device and minor allocation errors that can be repaired using the M S DO S SCAN DISK EXE utility Norton Disk Doctor or Windows 95 98
11. power is not applied The life of this battery should exceed 5 years If you find D ataBridge SDR is not keeping time correctly or that the time is displayed with a question mark after it you may need to replace the battery To replace the real time clock s battery find the battery clip located next to the DataBridge SDR DIP switches see Figure 5 1 Pull the D ataBridge SDR circuit board forward until you can extract the battery from its holder Replace the battery with a Panasonic CR2032 or equivalent making sure the positive face is in contact with the battery clip 16 Configuration The DataBridge SDR configuration menu system is split into submenus You can use menu functions to manage files configure and communicate with the data port set date and time set up output messages download data configure the storage media and control DataBridge SDR without using the front panel buttons 4 1 Main Menu DataBridge SDR s core functions are accessed from the main menu see Figure 4 1 17 Menu Reference Configuration M enu Reference D ataBridge SDR U ser s M anual rev 1 2 Acumen Instruments Corporation DataBridge SDR firmware rev 1 2b Set time Set date Toggle ANSI mode ANSI is ON PUNR 5 Edit messages 6 SCSI drive functions 7 File system functions 8 Enter serial passthrough mode mu Enter PLAY mode R Enter RECORD mode Toggle messages messages are OFF 9 Set baud ra
12. sTD signal can be read You the DTE transmit data to me on this line A DTE sRD signal means I receive data on this signal line A DCE sRD line means You the DTE will receive the data transmit on this signal line Sound confusing A look at athe DB9 connector pinouts and signal direction with respect to DTE e g your computer makes things a little more clear 43 Serial Port Basics DataBridge SDR U ser s M anual rev 1 2 pin number signal name 25 pin 9 pin direction transmitted data TD 2 3 DTE DCE received data RD 3 2 DTE DCE request to send RTS 4 7 DTE DCE clear to send CTS 5 8 DTE DCE data terminal ready DTR 20 4 DTE DCE data set ready DSR 6 6 DTE DCE data carrier detect DCD 8 1 DTE DCE ring indicator RI 22 9 DTE DCE signal ground GND 7 5 Table B 2 Pinouts for 9 pin and 25 pin serial connectors The cable that connects DTE devices such as your computer and DCE devices such as your modem is simple It simply connects TD pinto TD pin RD to RD etc A cable that connects DTE to DTE or DCE to DCE must connect the TD to RD and RD to TD This cable is referred to asa null modem cable because it can connect two terminals D TE s without the use of modems DCE s Notethat GND pinsare always connected M ost devices have female connectors D B9 or D B25 if they are configured for DCE operation and male connectors if they are configured for DTE operatio
13. to change the SCSI ID to 7 as shown in Table 5 1 5 1 9 Setting configuration port baud rate switches 10 12 In some cases you may wish to choose higher or lower data rates for the configuration port For example you may need a lower speed if you wish to configure control and monitor D ataBridge SDR remotely using a radio modem You may need a higher speed if you intend to download data through the serial port using XM ODEM Switches 10 11 and 12 are used to select a baud rate for the configuration port see Table 5 1 switch setting function 4 off disable hardware handshaking for the data port default on enable hardware handshaking for the data port 2 off disable hardware handshaking for the config port default on enable hardware handshaking for the configuration port 3 Sie reserved switch must be off off i 4 on reserved switch must be off 5 off display menus default on hide menus 6 off enable the Stop Play and Record buttons default on disable user interface buttons 7 off enable indicators LEDs default on disable indicators 8 off enable resume mode default on force DataBridge SDR into Stop mode on power up 9 off initiator SCSI ID 6 default on initiator SCSI ID 7 10 11 12 configuration port data rate off off off 230 400 bps off off on 115 200 bps off on off 57 600 bps off on on 38 400 bps on off off 19 200 bps on off on 9600 bps default on on
14. 22 GG GG ZZZZZZZZZZ ZZZZZZZZZ 1 Edit message contents 2 Edit message parameters Q Return to main menu Enter choice 1 2 Q 1 Enter message number 0 9 0 Enter message lt cr gt to end ASTRAL Figure 2 4 Changing message zero to ASTRAL Setting message parameters To change a message s parameters press 2 at the menu prompt When prompted enter the desired message number 0 9 and type a message followed by the Enter key Output intervals D ataB ridge sends a message then waits a specific amount of time before sending the message again D ataBridge prompts you to enter this waiting period or output interval To disable a message but leave its contents intact enter 0 For instance if the message should be output once every ten seconds enter 10 and press the Enter key Initialization Some devices begin sending data only after receiving a specific command the initialization string When prompted press Y to indicate that D ataB ridge SDR should send the message once when it enters Record mode Thisfeature can be used together with output interval to both initialize a device with a specific message and send the message periodically This is useful for resetting a data source periodically or automatically 11 Configuring D ataBridge SDR M essages with only a carriage return no line feed after them will appear to overwrite previous messages in your terminal software You can enable your communicat
15. 4 9 Before Incrementing After Incrementing BRIDGE DAT BRIDGEO1 DAT BRIDGEO1 DAT BRIDGE02 DAT BRIDGEO9 DAT BRIDGEOA DAT BRIDGEOZ DAT BRIDGE10 DAT BRIDGE10 DAT BRIDGE11 DAT Figure 4 9 Generating filenames when append mode is off Note A disk s root directory typically holds only 512 directory entries To avoid exceeding this 512 file limit do not turn append mode off in environments where power will be lost frequently D ataB ridge SDR can also periodically close and reopen files This is useful to ensure that data is committed to the disk especially when recording at low data rates When used with append mode off scheduled file closings ensure that your data files are a manageable size Each file is stamped with the date and time when closed which can later provide useful diagnostic information 23 Configuration M enu Reference DataBridge SDR U ser s M anual rev 1 2 Enter choice 1 2 3 4 5 6 0 8 Enable scheduled file closings Y N Y Enter file closing interval in seconds 0 16777215 604800 Figure 4 10 Configuring scheduled file closings To schedule file closings press 8 from the F ile System F unctions submenu When prompted press y then enter the file closing interval in seconds up to 16777216 seconds Table 4 1 provides useful conversion factors for specifying file closing intervals Interval Seconds 1 second 1 1 minute 60 1 hour 3600 1 day 86400 1 wee
16. 7 B6 B5 B4 B3 B2 Bl LED16 LED15 LED14 LED13 LED12 LED11 LED10 U7 Se SR ma gt sax gaz Ee 6n on sn on oao cubo IND bo cubi IND i3 cuo za m HSA IND i5 0 za gt CSA ans bo dan an za 8v xs meo sah EA 8v 1 S0 sa m3 9A N ha exso m sa ha 9A who Eto y var CSA in ip Eto y va EMSA an 9m med TX sap cmvA O m T cam om O so ceo Y za osa 5 wo cxzo Y za ayes E wo cyto taf oa m EN DO cyto tam oa m evr coo E oan HA wa coo oam ata 2 m EA em 10 an zo TV hr xn f 30 fo zo TV ra CHA m I9 A em Toho CR ny sn wi ei g D g RR 5 i 00014050 56 DataBridge SDR U ser s M anual rev 1 2 E 6 Bill of Materials The Switch Closure Interface E 6 1 Switch Closure Interface Circuit Board DESIGN MANUFACTURER QTY ATION DESCRIPTION MANUFACTURER PART NUMBER VENDOR VENDOR PART NUMBER 1 C1 33uF 16V tantalum chip capacitor Panasonic ECS T1CD336R Digi Key PCS3336CT ND TE Series 6 C2 C7 0 1uF 50V ceramic chip capacitor Panasonic ECU V1H104KBW Digi Key PCC104BCT ND 1206 SMD 2
17. 8 9 P R Figure 1 7 The DataBridge main menu Configuring DataBridge SDR N ow that you have access to D ataBridge SD R s menu system you are ready to configure it for use with your serial data source To accomplish this you must Set DataBridge SDR s date and time Specify a filename for recording Ensure that the media you are using is properly formatted and has enough free space to accommodate your data Be sure that DataBridge SDR and your device are communicating at the same speed and with the same serial data format parameters Determine whether you need to use hardware handshaking to communicate with your device Connect your device to D ataBridge SDR Check to see that your data source can communicate with D ataBridge SDR Before you begin be sure you have the documentation available for your serial data source If possible be sure you can communicate with the data source using the supplied software and or your communications software This intimate knowledge of your data source s communications standards will make connecting it to DataBridge SDR simple Configuring D ataBridge SDR DataBridge SDR U ser s M anual rev 1 2 2 1 Setting date and time D ataBridge SD R features a real time clock that reports the last modified date and time in a directory entry The real time clock is preset and battery backed so setting the date and time is seldom necessary For more information about D ataB ridge SD R me
18. ACUMEN INSTRUMENTS CORPORATION e y 1 A a ammm 4 DAMA RE IIS es AS A We EIA RETE ER FRE NE 4 lw DataBridge SDR User s Manual revision 1 2 2 99 Copyright This document is copyrighted by Acumen Instruments Corporation with all rights reserved No part of this document may be reproduced in any form without prior written consent of Acumen Instruments Corporation Copyright 1998 1999 by Acumen Instruments C orporation All rights reserved Disclaimer This manual has been thoroughly reviewed for accuracy and every effort has been made to ensure that the information is accurate and complete H owever different versions of this product have different features and capabilities and this manual only reflects one of those versions Therefore Acumen Instruments Corporation assumes no responsibility for errors omissions or defects in this material and shall not be liable for any damages resulting from their use The information in this document is subject to change without notice ACUMEN INSTRUMENTS CORPORATION MAKES NO WARRANTY OF ANY KIND WITH RESPECT TO THIS DOCUMENT EITHER EXPRESSED OR IMPLIED INCLUDING WITHOUT LIMITATION ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE Table Of Contents Getting Started inrer ea Dc iii ica 1 1 OVGIVIEW tege Pata d a a r ce a a n a ti a a adi e a 1 1 2 Before YOU start ecc nena xS aa ata pia bad ip aa al Aaa 2 1 3 A quick
19. C 13 9 receptacles on the rear panel one for each 8 switch port see Figure E 4 E 2 Operation To usethe Switch Closure Interface first connect the AM P CPC to screw terminal cables to the appropriate ports on the rear panel of your DataBridge SDR see Figure E 4 Then attach normally open NO or normally closed N C switches to the screw terminals O nce switches are connected to the SwCI you can verify normal operation of the SwCI 51 The Switch Closure Interface DataBridge SDR U ser s M anual rev 1 2 e e Serial Port Receptacle a 0 000 gt LA m Figure E 4 The DataBridge SDR rear panel with SwCI installed With D ataB ridge SD R s front panel removed sixteen indicators on the front of the SwCI are exposed see Figure E 5 If DataBridge SDR and the Switch Closure Interface are operating properly any closed switch will light the corresponding indicator while D ataBridge SDR is in Record mode If possible verify the operation of all switches connected to the SwCI by observing the indicators without the front panel Figure E 5 Sixteen indicator LED s for the SwCI With D ataBridge SD R s front panel in place and D ataBridge SDR in Record mode you can test the SwCI by generating switch events i e by changing the state of any switch connected to the SwCI and observing the data indicator on D ataBridge SD R s front panel If DataBridge SDR and the SwCI are working properly the dat
20. Crosstalk and Telix available for DO S users Windows Terminal included with M icrosoft amp Windows 3 1 and Windows NT 3 51 and H yperT erminal included with M icrosoft Windows 95 98 N T 4 0 Configure your software to communicate using the serial port you connected to DataBridge SDR the appropriate baud rate probably 9600 bps and the serial data format parameters probably 8N 1 See Section 0 if you need to G etting Started DataBridge SDR U ser s M anual rev 1 2 change D ataBridge SDR s serial parameters to match your communications software Be sure your software is configured for half duplex mode local echo is off and that your software isn t adding line feeds to incoming carriage returns If your software supports it enable AN SI or VT 100 VT 102 terminal emulation Once D ataBridge SDR is connected to your computer and you are running terminal software apply power by connecting the power supply sIEC cable to 120 VAC power The DataBridge main menu should appear see Figure Acumen Instruments Corporation 12 02 1998 14 20 30 DataBridge SDR firmware rev 1 2b Current filename is BRIDGEO1 DAT Set time Set date BWNH Toggle ANSI mode ANSI is ON Toggle messages messages are OFF 5 Edit messages 6 SCSI drive functions 7 File system functions 8 Enter serial passthrough mode 9 Set baud rate for attached device Enter PLAY mode R Enter RECORD mode Enter choice 1 2 3 4 5 6 7
21. J1 J2 0 100 shrouded header gold 10 3M 2510 6002UB Digi Key MHB10K ND position straight 2 J3 J4 0 100 shrouded header gold 20 3M 2520 6002UB Digi Key MHB20K ND position straight 16 LED1 5V T1 3 4 red diffused LED QT MR3050 Digi Key MR3050QT ND LED16 Optoelectronics 2 R1 R2 Bussed 10 pin 9 resistor 4700 Vishay Dale CSC10A 01 471G Newark 81F4857R470 0 2 CSC Series 2 R3 R4 Bussed 10 pin 9 resistor 4 7kO Bourns 4610X 101 472 Digi Key 4610X 1 472 ND 12 thick film conformal SIP 4 U1 U4 Optocoupler 4 channel SMD NEC PS2701 4 Digi Key PS2701 4NEC ND transistor output 2 U5 U6 Octal Bus Buffer 20 pin wide Toshiba TC74VHC541FW Digi Key TC74VHC541FW ND SOIC 2 U7 Quad 2 input NOR gate 14 pin Toshiba TC74VHCO2FN Digi Key TC74VHCO2FN ND narrow SOIC 2 U8 U9 Octal D Flip Flop 20 pin wide Toshiba TC74VHC574FW Digi Key TC74VHC574FW ND SOIC 1 U10 Isolated DC DC converter 1W Power One DSP1N5S5 Digi Key DSP1N5S5 ND 5V 5V single output E 6 2 Switch Closure Interface Internal Cable Assemblies MANUFACTURER QTY DESCRIPTION MANUFACTURER PART NUMBER VENDOR VENDOR PART NUMBER 2 0 100 10 pin gold socket CW Industries CWR 217 10 0000 Digi Key CKR10G ND connector w key w strain relief 2 12 10 conductor ribbon cable Belden 9L28010 Newark 36F652WA 28AWG stranded 7x36 0 050 pitch gray PVC 2 Amp CPC Series 1 size13 9 Amp 206705 3 Digi Key A1669 ND receptacle sq flanged sealed std
22. Q want to use my own 5 VDC power supply with D ataBridge SDR How do connect it A The power receptacle on the rear panel of DataBridge SDR sa Series 1 size 11 four pin standard sex AM P Circular Plastic Connector CPC AMP part number 206061 1 The plug that connects to D ataB ridge SD R s power receptacle is AM P part number 206060 1 The connector s pinout is shown in Table 6 1 pin function 45 0 VDC ground ground 12 0 VDC if needed ABRIL Table 6 1 Power connector pinout Pay careful attention to D ataBridge SD R s electrical specifications and power requirements see Appendix B Q When connect D ataBridge SD R to my computer why do see garbage on my screen A Your terminal s baud rate and D ataBridge SD R s baud rate do not match U nrecognizable characters may also be a symptom of mismatched data formats data bits stop bits parity Q changed my serial parameters in H yperTerminal and still see garbage Why A H yperTerminal requires that you disconnect and reconnect from the Call menu before its serial parameters actually change Q Why does H yperTerminal lock up run very slowly when connect it to D ataBridge SDR A H yperTerminal does this when it expects handshaking signals and doesn t get them If you are patient you can wait for H yperT erminal to display its Call menu and choose disconnect then disable hardware handshaking or you
23. TH ANY PRODUCT EXCEED THE ACTUAL AMOUNT PAID FOR SUCH A PRODUCT THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES WRITTEN OR ORAL EXPRESSED OR IMPLIED INCLUDING IMPLIED WARRANTIES OR MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE 35 DataBridge SDR Evaluation Kit A 1 Overview The evaluation kit isintended for use by those familiarizing themselves with DataBridge technology for custom applications H oused in an attractive desktop enclosure the evaluation system s also suitable for use in laboratory and other protected environments Figure A 1 DataBridge SDR evaluation kit shown equipped with an lomega Zip drive 37 DataBridge SDR Evaluation Kit DataBridge SDR U ser s M anual rev 1 2 The evaluation kit includes an integral 120 240 VAC power supply mass storage device and necessary cabling Because it contains the D ataBridge OEM circuit board the evaluation kit is functionally identical to D ataBridge SDR A 2 Front panel Like the rugged D ataBridge SDR the evaluation kit is controlled using its illuminated stop play and record buttons The data indicator and power indicator are also found on the front panel The evaluation kit is typically configured with removable mass storage which is accessible from the front panel Power indicator Data indicator Stop button Play button lomega Zip drive Record button Figure A 2 Front panel of the DataBridge SDR evaluation kit shown equipp
24. a filename 2 5 Entering messages Some data sources need to receive specific data strings or commands before they will transmit data O ther data sources send data continuously once they are initialized with a specific string or command If your device transmits data continuously without requiring input you don t need to send output messages 10 DataBridge SDR U ser s M anual rev 1 2 Configuring D ataBridge SDR You can configure D ataBridge SDR to send up to ten independent messages to the data source on startup periodically or both on intervals from once second to once 194 days Messages are stored as ASCII text strings in non volatile memory These storage locations are referred to as messages 0 9 To use messages first enter a text string as one of the ten messages N ext configure the message to be sent on initialization or at an interval specified in seconds D ataBridge SDR can also be configured to append a carriage return cR and or line feed lt LF gt to any message To enter a new message press 5 at the main menu prompt to enter the E dit M essages submenu Then press 1 to edit a message When prompted enter the desired message number 0 9 and type a message followed by the Enter key Acumen Instruments Corporation DataBridge SDR firmware rev 1 2b interval 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 CR LF message contents N vosauswnwHhos 222232
25. a indicator see Figure 1 1 should light as switches are opened or closed Section 3 2 1 explains the function of the data indicator 52 DataBridge SDR U ser s M anual rev 1 2 The Switch Closure Interface Switch 1 5V Com Figure E 7 Amp CPC to screw terminal cable One of two used for connecting to the Switch Closure Interface SwCI 53 The Switch Closure Interface DataBridge SDR U ser s M anual rev 1 2 E 3 Switch Closure Interface Data Format The Switch Closure Interface generates a line of telemetry on any switch transition either open to closed or closed to open Parsing data for only a single switch or single transition type open or closed is easily accomplished using a grep utility or the DOS FIND command The SwCI telemetry follows the format SW EVENT MM DD YY HH MM SS COUNTER Table E 1 describes each of the telemetry s comma delimited fields switch Switch that generated the event There are two sets of eight inputs A1 A8 and B1 B8 event type Indicates whether the switch opened or closed Both types of events are recorded so the SwCl is suitable for use with both normally open or normally closed switches date The date of the event Rolls from 99 to 00 to for the year 2000 time The time of the event Recorded in 24 hour format event counter Sequential counter This number is incremented for each event and helps determine if any data is lost or out of se
26. aBridge SDR Electrical Specifications D ataBridge SDR User s M anual v0 01 DataBridge SDR is also available with an optional 120 220VAC power supply Its power requirements are as listed in Table C 2 120 220 VAC External Power Supply input voltage 100 250 VAC input frequency 50 60 Hz input current 1 2A Table C 2 Power requirements for optional AC power supply C 1 1 Power receptacle pin configuration pin function 1 45 0 VDC 2 ground 3 ground 4 412 0 VDC if needed Table C 3 The DataBridge SDR power receptacle pin configuration C 2 Serial communications serial port electrical interface compliance EIA TIA 232E and V 28 data rates 300 1200 2400 4800 9600 19200 38400 57600 115200 230400 bps stop bits 10r2 parity none even odd handshaking RTS CTS DTR DSR Table C 4 Serial communications specifications for DataBridge SDR C 3 SCSI interface SCSI interface SCSI compliance ANSI SCSI standard X3 131 1994 electrical interface single ended SCSI SCSI transfer mode 8 bit asynchronous SCSI commands industry standard SCSI command set storage capacity limited only by storage device and FAT file system Table C 5 SCSI interface specifications for DataBridge SDR 48 DataBridge SDR Mechanical Specifications D 1 Dimensions DataBridge SDR cir
27. able connecting the SwCI to the main D ataBridge circuit board The power consumed by the SwCI will vary depending on how many switches are closed since the optocoupler will draw about 10mA per closed switch and D ataBridge SDR isin Record mode since the indicator LED s consume about 13mA each 58 if DataBridge SDR circuit board and SwCl 5VDC approx 100mA DataBridge SDR and SwCl with lomega Zip Drive no switches closed Stop mode 5VDC 600mA avg 1250mA peak Play mode 5VDC 850mA avg 1250mA peak Record mode 5VDC 850mA avg 1250mA peak DataBridge SDR and SwCl with lomega Zip Drive all switches closed Stop mode 5VDC 760mA avg 1410mA peak Play mode 5VDC 1200mA avg 1450mA peak Record mode 5VDC 1200mA avg 1450mA peak Table E 2 DataBridge SDR power consumption with SwCl and lomega Zip drive installed DataBridge SDR U ser s M anual rev 1 2 The Switch Closure Interface E 7 2 Isolation The Switch Closure Interface is designed to provide electrical isolation between it s circuitry and the screw terminals The optocouplers and isolated DC DC converter provide more than 500VDC isolation E 7 3 Switch sampling rate The Switch Closure Interface samples the screw terminals every 5 milliseconds for an effective update rate of 200H z To debounce the inputs the Switch Closure Interface requires successive events before recording data 59
28. act your manufacturer or support provider for information about adding a serial port to your computer If your computer is equipped with a D B9 male receptacle connect the D ataBridge SD R dual serial cable s D B9 female connector to your computer If your computer s available serial port is a DB25 male connector you will need to purchase a D B9M to D B25F adapter often referred to as an AT adapter to connect the 9 pin D ataBridge SDR cable to your 25 pin serial port the adapter has D B9 male and D B25 female connectors e EDD o ES PIFI IN VINE Figure 1 6 DB25 female to DB9 male adapters AT adapter O nce you have located your serial port you need to know whether your port is configured for operation as COM 1 COM2 COM3 or COM 4 some computers even include CO M 5 CO M 8 In most cases a port that uses a D B9 male connector is configured as CO M 1 or perhaps CO M 3 while a D B25 male connector is configured as CO M 2 or COM 4 If some of your computer s ports are occupied by a mouse modem serial printer or other serial device you may need to explore your computer s configuration information and use a process of elimination to determine your port s COM designation 1 4 2 Communications software Now that DataBridge SDR is connected to your computer you must configure communications software also known as terminal software to communicate with it Typical communications software includes Procomm Plus
29. and returns to Stop Mode when it can no longer allocate clusters Delete files from the Zip disk reformat it or replace it Sometimes disks with corrupt files cause disks to appear full prematurely Use ScanDisk included with DOS or Windows 95 to check your disk for allocation errors Q I ve been using DataBridge SDR with a hard disk for about six months Why does it now stay in Stop M ode when press the Record button A Aswith the Zip disk DataBridge SDR returns to Stop M ode when it can no longer allocate disk clusters D ataBridge SDR obviously cannot eject a hard disk Q checked my disk and it is only 99 full H owever DataBridge SDR still ejects it when press the record button Why A To maximize data integrity D ataB ridge SDR allocates clusters in advance D ataBridge SDR will enter Record mode only when it is able to allocate these clusters D ataB ridge SDR is designed to allocate only about 99 of the drives free space leaving the last sector of the file allocation table FAT free Q Why does the date time display in menu mode have a question mark after it A The date and time are shown with a question mark whenever the real time clock s internal oscillator stops This may occur when the battery voltage is low or the battery is temporarily shorted or removed If this happens repeatedly replace the real time clock s battery 30 DataBridge SDR U ser s M anual rev 1 2 Troubleshooting
30. ataB ridge SD R s basic functions are controlled using the three buttons located on the front panel see Figure 1 1 The indicators in the buttons indicate the D ataB ridge SD R s current operating mode Stop Play Record The data indicator indicates that data is received by D ataBridge SDR and is used to verify proper function of the data recorder Stop Play Record Data Button Button Button Indicator Figure 1 1 DataBridge SDR s front panel showing the location of the data indicator and Play Stop and Record buttons The power connector see Figure 1 2 found on DataBridge SDR s back panel supplies 5 VDC and or 12 VDC The serial connector connects DataBridge SDR to your data source and optionally a PC running communications software The SCSI connector is used for high speed data downloads using a PC equipped with a SCSI adapter DataBridge SDR U ser s M anual rev 1 2 G etting Started SCSI Port 2 Serial Ports Power Figure 1 2 DataBridge SDR s rear panel showing the location of the serial ports and power receptacle 1 4 Deploying DataBridge SDR 1 4 1 Connecting the power supply and serial cables to your data recorder A cable that mates with the AM P Circular Plastic Connector CPC receptacle found on the rear panel is supplied with the D ataBridge SDR The cable s female D B9 connector mates with the male connector typically found on computers and other DTE equipment The cable s D B9 male connector mat
31. ates D ataBridge SD R s Stop Play and Record modes DataBridge SDR is equipped with two serial ports With terminal software on a PC you can use the configuration port to manage files configure and communicate with the data port set date and time set up output messages download data configure the storage media and enter Record and Play modes During Record mode you can also monitor recording using the configuration port D uring Record mode the data port accepts RS 232C serial data from your data source For data sources that require initialization or querying DataBridge SDR can store and transmit up to ten user defined messages Each message is independent and can be sent once at power up or periodically at specific intervals The data sourceis a device that transmits serial data for use by a computer printer or data logger D ataB ridge SD R s ports support baud rates up to 230 400 bps and hardware handshaking for reliable high speed communication D ataBridge SDR is also equipped with a real time clock power saving features non volatile memory and resume on power failure feature G etting Started DataBridge SDR U ser s M anual rev 1 2 1 2 Before you start Before you start be sure you have the following items available e The DataBridge serial data recorder SDR e A power supply e TheDataBridge SDR dual serial cable e The manual supplied with your computer or terminal 1 3 A quick guide to DataBridge SDR D
32. ch 5 see Table 5 1 to hide the configuration menus to make DataBridge SDR more responsive When menus are hidden keystrokes still active menu functions 5 1 5 Disabling buttons switch 6 Y ou can use switch 6 to disable the D ataBridge SDR front panel buttons see Table 5 1 Use this option if you control D ataBridge SDR using only the configuration port This prevents accidental contact or switch failure from returning D ataBridge SDR to Stop mode This option may be useful when D ataBridge SDR will operate for unattended for long periods of time 5 1 6 Disabling indicators switch 7 When power saving is important you can use switch 7 to disable the front panel indicators as shown in Table 5 1 When the front panel indicators are disabled you can still communicate via the configuration port to determine D ataBridge SD R s current mode 5 1 7 Disabling resume mode switch 8 If you are troubleshooting a problem with D ataBridge SDR and have resume mode turned on see Section 4 4 you may need to use switch 8 to force D ataBridge SDR into Stop mode when you apply power O nce you ve gotten D ataB ridge SDR stopped you can enable resume mode again using switch 8 as shown in Table 5 1 26 DataBridge SDR U ser s M anual rev 1 2 DIP Switch R eference 5 1 8 Initiator ID switch 9 D ataBridge SDR isa SCSI initiator whose ID is by default set to 6 If you are using a device that occupies SCSI ID 6 you may need to use switch 9
33. cuit board dimensions 4 00 L x 3 00 W x 0 40 H 10 2 cm x 7 6 cm x 1 0 cm weight approx 1 0 oz 28 3 grams DataBridge SDR in extruded aluminum enclosure dimensions 11 50 D x 7 75 W x 4 20 H 29 2 cm x 19 7 cm x 10 7 cm weight with lomega Zip drive installed 7lbs 10z 3 2 kg Table D 1 DataBridge SDR dimensions DataBridge SDR is also available with an optional 120 220VAC power supply Its dimensions are as listed in Table D 2 120 220 VAC External Power Supply dimensions 6 00 L x 3 25 W x 2 00 H 15 25 cm x 8 25 cm x 5 08 cm output cord length approx 72 183 cm Table D 2 Dimensions for optional AC power supply 49 DataBridge SDR M echanical Specifications DataBridge SDR U ser s M anual rev 1 2 D 2 Environment DataBridge SDR s extruded aluminum enclosure buttons and connectors are designed to at a minimum meet the IEC 144 855420 I P 65 rating dust tight and protected against water jets and the equivalent NEMA 12 rating industrial use dust tight and drip tight DataBridge SDR in extruded aluminum enclosure operating ambient temperature 0 50 C relative humidity up to 100 R H condensing altitude 100 000 ft limited by recording media only Table D 3 DataBridge SDR environment specifications Note The optional external 120 220VAC power supply is not rated for use in an unprotected
34. desired baud rate in bps Eguation 2 1 Eguation for specifying an arbitrary baud rate divisor 2 3 Data port handshaking H ardware handshaking ensures that D ataBridge SDR sends messages only when the data source is ready to accept them Likewise hardware handshaking prevents a data source from sending data when D ataBridge SDR is not ready to receive it Remove D ataB ridge SD R s front panel see Figure 5 1 and turn switch 1 on see Table 5 1 to enable handshaking on the data port Be sure that your serial data source and D ataBridge SD R use the same handshaking settings If DataBridge SDR monitors the handshaking signal but your data source does not send it DataBridge SDR may wait indefinitely for permission to transmit messages Likewise if your data source monitors the handshaking signals but D ataBridge SD R doesn t send the signal the software may never transmit output data 2 4 Specifying a filename DataBridge SDR records data to a file in the mass storage device s root directory By default D ataB ridge SDR records data to a file called Configuring D ataBridge SDR DataBridge SDR U ser s M anual rev 1 2 DataBridge SDR records and plays only files found in the root directory of the disk BRIDGE DAT You can keep this filename or specify a new filename that reflects the data it contains For example you may wish to use PRESSURE TXT for pressure data or even a name like TEMP0998 TXT for temperature data fro
35. ed with an lomega Zip drive A 2 1 Accessing DIP switches and RTC battery The configuration DIP switches see Figure 5 1 and real time clock battery are found on the DataBridge OEM circuit board directly behind the front panel To access the DIP switches or battery first remove the four screws found in the rubber feet on the base of the unit and remove the housing by sliding it toward the rear Then carefully detach the plastic front panel from the steel frame Refer to Table 5 1 for DIP switch functions 38 DataBridge SDR U ser s M anual rev 1 2 D ataBridge SDR Evaluation Kit A 3 Rear panel On the rear panel of the DataBridge SDR evaluation kit are the 120 240 VAC power cord connector and power switch the D B9 serial port connectors and the Centronics 50 SCSI connector The SCSI ID selector is not used Power switch SCSI ID selector not used AC power connector IEC 320 Data port male DB9 SCSI connector Centronics 50 Configuration port female DB9 Figure A 3 Rear panel of the DataBridge SDR evaluation kit 39 Serial Port Basics B 1 Serial specifications Serial data is any data that is sent one bit at a time using a single electrical signal In contrast parallel data is sent 8 16 32 or even 64 bits at a time using a signal line for each bit Data that is sent without the use of a master clock is said to be asynchronous serial data Several communications standards exist f
36. er second The constant attention a computer must pay to its serial port makes this problematic particularly in multitasking environments such as M icrosoft Windows 3 1 95 98 N T B 2 1 Data rates and the UART Computer hardware designers solve this problem by allowing the computer to respond to characters less frequently A U niversal Asynchronous Receiver T ransmitter U ART the component responsible for communicating via RS 232 may contain several bytes of memory called a FIFO first in first out memory The original IBM PC and many of its successors used the 8250 UART which contained no FIFO That is a computer with 8250 or 16450 U ART s must respond to every incoming character N ewer PC sincorporate the 16550 U ART or a variant The 16550 incorporates a 16 byte FIFO and is mandatory for communications at speeds above 9600 bps and is important for error free communications at lower speeds as well You can find out which type of U ART s your computer uses by usingthe M SD EXE tool provided with DO S and Windows or by looking in the Windows 95 98 control panel 42 DataBridge SDR U ser s M anual rev 1 2 Serial Port Basics B 3 More asynchronous serial parameters In most cases the data rate in bytes second can be approximated by dividing the baud rate in bits second by 10 If a byte consists of 8 bits why divide by 10 To transfer data asynchronously the UART must frame the 8 data bits between a stop bit and asta
37. es with the port on your data source Connect the AMP CPC plug to the corresponding receptacle on the D ataB ridge rear panel see Figure 1 2 leaving the cable s D B9 connectors unconnected Figure 1 3 The DataBridge SDR dual serial cable Y our computer s female DB25 connector is most G etting Started DataBridge SDR U ser s M anual rev 1 2 Similarly the power supply included with D ataBridge SDR uses a 4 pin AMP CPC connector Connect the power supply to DataBridge SDR but leave the IEC cable for 120 VAC power unconnected Figure 1 4 A DataBridge SDR 120VAC power supply Locating your computer s serial port Y our serial port is found on the back of your computer M ost computers are equipped with either aD B9 or D B25 male connector see Figure 1 5 Male connectors have pins while female connectors have sockets If your computer uses a serial mouse it may already occupy your DB9 male likely a parallel port connector Likewise if your computer is equipped with an external modem not a serial port it may occupy your D B25 male connector 9 I ll DB9 male connector DB25 male connector Figure 1 5 Locating the serial port on the rear panel of a PC DataBridge SDR U ser s M anual rev 1 2 G etting Started If you are unable to locate your serial port s consult the documentation included with your computer If all of your computer s serial port s are occupied cont
38. eturn to main menu Oms dt Enter choice 1 2 3 4 5 0 Figure 4 3 The SCSI Drive Functions submenu 19 Configuration M enu Reference DataBridge SDR U ser s M anual rev 1 2 The items in the SCSI Drive Functions menu are used primarily for configuring D ataBridge SD R with a new mass storage device or performing diagnostics on aSCSI device The submenu also includes spinup delay parameters and functions specifically for Q uantum hard drives When you install a new storage device you must tell D ataB ridge SDR which SCSI ID the storage device uses Do this by pressing 1 DataBridge SDR prints a list of SCSI ID s and devices found see Figure 4 4 The current SCSI target is marked with the letter T The initiator device D ataBridge SDR is marked with the letter I Type the number 0 7 that corresponds to the mass storage device or press Enter to keep the current target ID setting target ID 0 lt device timeout gt target ID 1 lt device timeout gt target ID 2 lt device timeout gt target ID 3 lt device timeout gt target ID 4 lt device timeout gt T target ID 5 IOMEGA ZIP 100 I target ID 6 DataBridge SDR firmware rev 1 2b target ID 7 lt device timeout gt Enter desired target ID Figure 4 4 The select SCSI target ID function Menu item 2 controls drive spinup delays The spinup delay is the amount of time after power is applied in seconds that D ataBridge SDR waits before entering record
39. hen the begin your download message appears optionally initiate an ASCII download using your terminal software then press any key to begin or hold the ctrl key and press c Ct r1 C to return to the File System Functions submenu 22 DataBridge SDR U ser s M anual rev 1 2 Configuration M enu Reference Acumen Instruments Corporation DataBridge SDR firmware rev 1 2b Current filename is BRIDGEO1 DAT 1 Display root directory 2 Change current filename 3 Delete file 4 Rename file 5 Toggle append mode append is OFF 6 Download file via XMODEM 7 Download file as ASCII text 8 Set scheduled file close parameters 00036000 seconds Q Return to main menu Enter choice 1 2 3 4 5 6 Q 7 Press any key to begin your ASCII download use CTRL C to cancel Figure 4 8 Downloading a file via ASCII When power is lost during recording DataBridge SDR can either append new data to the current file when power is restored or begin recording using a new file M enu option 5 turns append mode on and off The menu displays the state of append mode When append mode is off D ataB ridge SDR will generate a name for the new file based on the current filename It does this by incrementing the filename using the characters O through 9 and A through 2 If the file s name without extension is less than eight characters D ataBridge SDR pads the name with zeros when append mode is off Examples of filename generation are shown in Figure
40. ions software s append linefeeds to incoming carriage returns feature to see these messages properly reinitializing a data source if its power islost Entering N disables this feature Carriage return and line feed When prompted enter v when prompted to instruct D ataBridge SDR to add a carriage return and or line feed to the end of a message M any devices require a carriage return and or line feed after a message while others require neither Entering N disables this feature Your data source s documentation can help you determine whether carriage returns and or line feeds are required Acumen Instruments Corporation DataBridge SDR firmware rev 1 2b pol interval 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 F message contents vosauswnwHhos 22223222 GG GG ZZZZZZZZZZO L N N N N N N N N N N 1 Edit message contents 2 Edit message parameters Q Return to main menu Enter choice 1 2 Q 4 Enter message number 0 9 0 Enter output interval in seconds 0 16777215 10 Initialize with this message Y N N Append carriage return to this message Y N Y Append line feed to this message Y N Y Figure 2 5 Configuring message zero 2 6 Testing your configuration To test your configuration you can disconnect the configuration port plug and use a null modem adapter or cable to connect the dual serial cable s male D B 9 plug to the compute
41. k 604800 1 month 2629800 6 months 15778800 based on a 365 4 day year Table 4 1 File closing intervals As with other submenus you can return to the main menu by pressing Q 24 DIP Switch Reference 5 1 Overview DIP switch settings are used to customize the way D ataBridge SDR operates for your application You can access the DIP switches by removing the DataBridge SDR front panel see Figure 5 1 Table 5 1 summarizes each DIP switch function Figure 5 1 Location of the DataBridge SDR DIP switches 25 DIP Switch R eference DataBridge SDR U ser s M anual rev 1 2 5 1 1 Enabling data port handshaking switch 1 If your serial data source supports it you may wish to use switch 1 to enable hardware handshaking using the RTS and CTS signal lines see Table 5 1 This prevents lost data during long disk seeks 5 1 2 Enabling configuration port handshaking switch 2 You may also want to enable hardware handshaking for the configuration port using switch 2 if you plan to download data using the serial port or if you are using a slow computer and notice lost characters in the D ataBridge menus see Table 5 1 5 1 3 Reserved switches switches 3 and 4 Switches 3 and 4 are reserved and must be set to the off position see Table 5 1 5 1 4 Displaying and hiding menus switch 5 If you connect to the configuration port using a radio modem or other serial link with a low data rate you may wish use swit
42. les and download files You can also control the filename D ataBridge SDR uses for recording the way D ataBridge SDR resumes recording when power is lost and how often D ataBridge SDR creates a new file for recording data To display the current drive s root directory press 1 If the root directory contains files each file s name attributes last modified time date and file size in bytes are shown see Figure 4 6 Once the directory has been displayed press any key to return to the File System Functions menu Enter choice 1 2 3 4 5 6 0 1 BRIDGEO1 DAT a 12 07 34 12 07 1998 0000039424 BRIDGE02 DAT a 17 03 46 09 15 1998 0000115215 Press any key to continue Figure 4 6 Displaying the root directory To change the filename D ataB ridge SDR uses to record data press 2 from the File System Functions submenu When you are finished the specified file name appears at the top of the File System Functions submenu see 21 Configuration M enu Reference DataBridge SDR U ser s M anual rev 1 2 Figure 4 5 In addition to file recording and playback this filename is used in menu options 3 4 6 and 7 To delete a file found in the root directory first specify the filename to delete using menu option 2 then use menu option 3 to delete the file To rename afile specify its filename using menu option 2 then press 4 When prompted enter a new name for the file When using menu options 3 and 4 if the specified file is no
43. m September 1998 Notes about filenames When you enter filenames they must conform to the D O S 8 3 filename format This means that files contain up to 8 characters a period dot and up to three more characters For example BRIDGE DAT ABCDEFGH 123 and 1 are all valid filenames while DATA FILE and JOHNSMITH TXT are not DataBridge SDR ignores characters you type that are not allowed in DOS filenames such as To specify the name of the file D ataBridge will use for recording data press 7 at the main menu prompt to enter the File System Functions submenu see Figure 2 3 From the File System Functions menu press 2 Then when prompted type a filename pressing the Enter key when finished if your file extension is shorter than three characters If your filename without extension is eight characters D ataB ridge automatically enters the period dot before the extension You can return to the main menu by pressing Q Acumen Instruments Corporation DataBridge SDR firmware rev 1 2b Current filename is BRIDGEO1 DAT Display root directory Change current filename Delete file Rename file Toggle append mode append is ON Download file via XMODEM Download file as ASCII text Set scheduled file close parameters OFF Return to main menu IO 0 10 Ui QN H Enter choice 1 2 3 4 5 6 0 2 Enter new filename cr to end ABCDEFGH 123 Figure 2 3 Specifying
44. mode For instance if the power on delay is set to 30 seconds DataBridge SDR will wait 30 seconds before accessing the storage device This allows time for drives with high spindle speeds to reach maximum speed before reads and writes are attempted Use menu item 3 to configure hard drive power saving features When enabled O N this feature instructs Q uantum hard drives to enter a power saving mode sleep mode once they have been idle for a specific period of time specified in tenths of seconds Menu items 4 and 5 are used by support personnel to diagnose problems with SCSI storage devices To return to the M ain menu from the SCSI Drive Functions menu press Q 20 DataBridge SDR U ser s M anual rev 1 2 Configuration M enu Reference 4 4 File System Functions To enter the File System Functions submenu press 7 from the main menu The File System Functions submenu appears see F igure 4 5 Acumen Instruments Corporation DataBridge SDR firmware rev 1 2b Current filename is BRIDGEO1 DAT Display root directory Change current filename Delete file Rename file Toggle append mode append is ON Download file via XMODEM Download file as ASCII text Set scheduled file close parameters OFF Return to main menu I O0 1o0 0 BWNH Enter choice 1 2 3 4 5 6 0 Figure 4 5 The File System Functions submenu U sing the File System Functions menu you can display a directory of files delete and rename fi
45. n but this is not always the case There is a simple trick for determining whether a device is DTE or DCE Connect a voltmeter s ground line to the connector s GN D pin Then probe the voltage on the TD and RD pins If the TD pin voltage is small 3V Vin 3V the device is configured to receive data on the TD pin and thus isa DCE device Likewise if the RD pin voltage is small the device is receiving data on the RD pin and thusisDTE B 3 2 Handshaking H andshaking signals by the receiving device to tell the transmitter I am ready for data or am not ready for data These signals are optional the receiver may always be ready for data or may choose to simply discard data it couldn t process A DTE device asserts the request to send RTS signal when it is ready to receive data and deasserts it when it cannot accept data Likewise a DCE device asserts clear to send CTS when it is ready to receive data The RTS and CTS signals form a handshaking pair and their use constitutes RTS CTS handshaking The data terminal ready DTR signal asserted by the DTE and the data set ready DSR asserted by the DCE serve similar functions and constitute D TR D SR handshaking A DTE or DCE devices may employ either or both forms of handshaking O ften deasserting RTS or CTS signals micro events such as a full buffer that is full but will be empty soon while 44 DataBridge SDR U ser s M anual rev 1 2
46. nus see chapter 4 To set the time press 1 at the menu prompt Then when prompted further enter the time in 24 hour format using two digits for each of hours minutes and seconds omit the colons between each field Press any key to return to the D ataBridge main menu For an example see Figure 2 1 Acumen Instruments Corporation 12 02 1998 14 42 14 DataBridge SDR firmware rev 1 2b Current filename is BRIDGEO1 DAT 1 Set time 2 Set date 3 Toggle ANSI mode ANSI is ON 4 Toggle messages messages are OFF 5 Edit messages 6 SCSI drive functions 7 File system functions 8 Enter serial passthrough mode 9 Set baud rate for attached device mu Enter PLAY mode R Enter RECORD mode Enter choice 1 2 3 4 5 6 7 8 9 P R 1 Current time is 14 42 15 Enter new time hh mm ss 09 00 00 Time set to 09 00 00 Press any key to continue Figure 2 1 Setting the time To set the date press 2 at the menu prompt Then enter the date using two digits for each of the month day and year fields omitting any hyphens or other characters Press any key to return to the D ataBridge main menu See Figure 2 2 for an example Acumen Instruments Corporation 02 05 1998 14 42 14 DataBridge SDR firmware rev 1 2b Current filename is BRIDGEO1 DAT 1 Set time 2 Set date 3 Toggle ANSI mode ANSI is ON 4 Toggle messages messages are OFF 5 Edit messages 6 SCSI drive functions 7 File system functions 8 En
47. or the transfer of asynchronous serial data Common PC s transfer data using the EIA RS 232C also known as V 28 or V 24 U pdated versions of this standard include RS 232D and EIA TIA 232E but most literature still refers to the RS 232C or RS 232 standard O ther asynchronous serial standards in common use include RS 422 RS 423 and RS 485 These standards allow higher data rates and longer cable lengths than RS 232 and are common in industrial settings B 2 Data rates The baud rate for a serial connection is the number of bits that are transmitted per second It is specified in bits second or baud For example a 9600 baud serial link transfers 9600 bits per second 41 Serial Port Basics DataBridge SDR U ser s M anual rev 1 2 The EIA RS 232C standard permits data rates up to 19200 bps and cable lengths up to 400 meters but not both data rate maximum distance bps meters feet 19200 15 45 9600 25 76 4800 50 152 2400 100 304 1200 200 608 600 400 1216 Table B 1 Data rates and distances for RS 232 communications Although the specification only defines rates up to 19200 bps communication using data rates as high as 230400 bps and a short lt 2 meter cable is common Standard modems communicate with computers at up to 115200 bps As you may have guessed the use of high baud rates requires more capable computer hardware At high baud rates a computer must process as many as 23000 characters p
48. quence Table E 1 Fields in an SwCl telemetry string A1 close 05 01 98 09 10 39 00000001 Al open 05 01 98 09 10 45 00000002 B3 close 05 01 98 17 21 17 00000003 B3 open 05 01 98 17 21 56 00000004 Figure E 8 Sample SwCl telemetry strings 54 The Switch Closure Interface DataBridge SDR U ser s M anual rev 1 2 E 4 Schematic v tan ev zan ev can ww vam sv san 9v san um Lan ev san 18 san za oran rro ve tan sa eran 98 vitam za stan sa oram b5 a o ala la la o ajajaja o a la lala o
49. r running communications software Y our computer then becomes a data source Press the Record button on the front panel After a few seconds D ataB ridge SD R s record indicator will light and the output messages you entered will be displayed at the specified output interval To ensure that recording is occurring type several keystrokes on the computer running communications software or use the software s ASCII upload feature to send a text file D ataBridge SD R s data indicator should blink as you press keys When finished press the Stop button on the front panel Then press the Play button to view the data you typed or uploaded Note D ataBridge SDR will not display data while it is being recorded You can enable your terminal software s local echo or full duplex feature to view data as you send it 12 DataBridge SDR U ser s M anual rev 1 2 Operating DataBridge 3 1 Stop mode Stop mode is the default power up mode When DataBridge SDR sin Stop mode the Stop indicator is illuminated and you can access menu functions using communications software on a computer attached to the configuration port Before you connect your device be sure D ataBridge SDR isin Stop mode 3 2 Record mode When you press the Record button or type R from the main menu D ataBridge SDR searches for the file you specified in the File System Functions menu creates it if necessary and opensit Once D ataBridge SDR has successfully
50. rt bit The start bit is always a zero while the stop bit is always a one So a byte of data sent serially is made up of 10 bits instead of the usual 8 Asynchronous serial devices can communicate using 7 or 8 data bits and 1 1 or 2 stop bits To further complicate matters devices can also employ a parity bit instead of an eighth data bit to check for errors Even parity systems transmit a one when the sum of the seven bits is an even number while odd parity systems transmit a one when the sum is odd Still more exotic systems may specify mark or space parity where the parity bit is always a one or zero respectively What does all of this mean Device vendors usually specify their data rate and format using statements like 9600 8N 1 which translates to 9600 bps 8 data bits no parity and 1 stop bit or 19200 7E1 which translates to 19200 bps 7 data bits even parity and 1 stop bit M ost serial devices format of eight data bits no parity and one stop bit 8N 1 B 3 1 DTE and DCE The RS 232 specification defines two classes of devices data terminal equipment DTE and data communication equipment DCE Your computer s serial port is configured for DTE operation since the computer acts as a terminal Modems and many other serial devices are configured as DCE since they are communications equipment What s the difference A DTE device s TD signal means I transmit data on this line A DCE
51. sex 9 Amp CPC Series 1 pins gold 24 Amp 66400 4 Digi Key A1648 ND 20 AWG crimp 2 Amp CPC size 13 connector cap Amp 213485 1 Digi Key A16043 ND circular seal w chain 4 4 40x0 375 stainless steel socket Brikksen Hokel SSSHCS004003 head cap screw 4 4 40 stainless steel machine Brikksen Hokel SSHNO04 screw nut 4 4 stainless steel medium lock Brikksen Hokel SSLWO004 washer 57 The Switch Closure Interface DataBridge SDR U ser s M anual rev 1 2 E 6 3 Switch Closure Interface External Cable Assemblies MANUFACTURER QTY DESCRIPTION MANUFACTURER PART NUMBER VENDOR VENDOR PART NUMBER 2 Amp CPC Series 1 size13 9 plug Amp 206708 1 Digi Key A1302 ND std sex 2 Amp CPC size 13 connector boot Amp 54123 1 Digi Key A16047 ND adhesive lined heat shrink 9 Amp CPC Series 1 sockets gold Amp 66399 4 Digi Key A1661 ND 24 20 AWG crimp 2 3 Belden Infinity FCC 1 million Belden 7405A Newark 16F9504 Flex Cycles 9x20 AWG 7x30 16 0 125 x1 heat shrinkable tubing 3M FP 301 Digi Key FP018B 5 ND blue 18 0 125 x1 heat shrinkable tubing 3M FP 301 Digi Key FP018G 5 ND green 34 6 terminal spade 22 16AWG Amp 36195 Digi Key A09001 ND short uninsulated 4 8 contact 0 438 barrier block Cinch 8 141 Digi Key CBB208 ND E 7 Specifications E 7 1 Power Requirements The Switch Closure Interface receives its power through the internal c
52. t found DataBridge SDR simply returns to the File System Functions menu Menu options 6 and 7 allow you to download the current file using terminal software To initiate an XMODEM download press 6 and wait for the begin your download message see Figure 4 7 Then using your terminal software start an XMODEM download You can cancel an XM ODEM download and return to the File System Functions submenu by holding the Ctrl key and pressing X Ctr1 X Acumen Instruments Corporation DataBridge SDR firmware rev 1 2b Current filename is BRIDGEO1 DAT 1 Display root directory 2 Change current filename 3 Delete file 4 Rename file 5 Toggle append mode append is OFF 6 Download file via XMODEM 7 Download file as ASCII text 8 Set scheduled file close parameters 00036000 seconds Q Return to main menu Enter choice 1 2 3 4 5 6 0 6 Begin your XMODEM download now use CTRL X to cancel Figure 4 7 Downloading a file via XMODEM N ote D ataBridge SDR uses XM ODEM checksum protocol Terminal software that automatically selects between XM ODEM checksum and XM ODEM CRC may require 5 15 seconds to determine that it is in XM ODEM checksum mode and begin a download You can use menu option 7 to download a file as ASCII text ASCII downloading doesn t provide error checking but is useful for displaying short files or for downloading using terminal software that doesn t support XM ODEM To initiate an ASCII download press 7 W
53. te for attached device Enter choice 1 2 3 4 5 6 7 8 9 P R 12 02 1998 14 20 30 Current filename is BRIDGEO1 DAT Figure 4 1 DataBridge SDR main menu The main menu includes functions for controlling both D ataB ridge SDR and the attached device Serial passthrough mode provides a means for communicating with the device connected to the data port To enter passthrough mode press 8 from the main menu To return to the main menu type then wait two seconds for the menu to appear N ote incorrect handshaking settings may cause D ataBridge SDR to hang during passthrough mode Particularly enabling RTS CTS handshaking for a device that doesn t support hardware handshaking may cause these hangs If D ataBridge SDR hangs during passthrough remove power for five seconds then reapplying power To set the baud rate for the data port press 9 then select a baud rate from the displayed list 2400 4800 9600 19200 38400 57600 115200 230400 bps Select a baud rate that matches the rate used by the device attached to the data port You can use Equation 4 1 to configure the data port for nonstandard baud rates divisor ni 7372750 desired baud rate in bps Equation 4 1 Equation for specifying an arbitrary baud rate divisor Like the Play and Record buttons the main menu commands e and Rare used to immediately enter play and record modes To return to stop mode hold the ctrl key and press Ct r1
54. ter serial passthrough mode 9 Set baud rate for attached device mu Enter PLAY mode R Enter RECORD mode Enter choice 1 2 3 4 5 6 7 8 9 P R 2 Current date is 02 05 98 Enter new date mm dd yy 02 04 98 Date set to 02 04 98 Press any key to continue Figure 2 2 Setting the date DataBridge SDR U ser s M anual rev 1 2 Configuring D ataBridge SDR 2 2 Setting data port baud rate Before DataBridge SDR and your data source can communicate they must interact at the same data rate and using the same data format DataBridge SDR uses a format of eight data bits no parity and one DataBridge SD R s data port and configuration port are by default cs eliza configured to communicate at 9600 bps If your data source can communicate at 9600 bps also referred to as 9600 baud it may be easiest to configure it for 9600 bps For devices with a fixed data rate you will need to set D ataB ridge SD R s data port baud rate to match your data source You may also wish to choose a higher data rate and hardware handshaking if your data source sends a high volume of data To set the baud rate for the data port press 9 then select a baud rate from the displayed list 2400 4800 9600 19200 38400 57600 115200 230400 bps Select a baud rate that matches the rate used by your data source You can use Equation 2 1 to configure the data port for nonstandard baud rates like 7200 and 3600 bps divisor ni LE
55. the failure and any other pertinent information 7 3 Warranty 7 3 1 One year warranty Acumen Instruments Corporation warrants this product to be free from defects in materials and workmanship for a period of one 1 year from the date of shipment During the warranty period Acumen Instruments Corporation will at its option either repair or replace products that prove to be defective 7 3 2 Exclusions This warranty shall not apply to any defect failure or damage caused by misuse abuse improper application alteration accident disaster negligence use outside of the environmental specifications improper or inadequate maintenance or incorrect repair or servicing not performed or authorized by Acumen Instruments C orporation 34 DataBridge SDR U ser s M anual rev 1 2 Service and Support 7 3 3 Limitations ACUMEN INSTRUMENTS CORPORATION SHALL IN NO EVENT HAVE OBLIGTIONS OR LIABILITIES TO BUYER OR ANY OTHER PERSON FOR LOSS OF PROFITS LOSS OF USE OR INCIDENTAL SPECIAL OR CONSEQUENTIAL DAMAGES WHETHER BASED ON CONTRACT TORT INCLUDING NEGLIGENCE STRICT LIABILITY OR ANY OTHER THEORY OR FORM OF ACTION EVEN IF ACUMEN INSTRUMENTS CORPORATION HAS BEEN ADVISED OF THE POSSIBILITY THEREOF ARISING OUT OF OR IN CONNECTION WITH THE SALE DELIVERY USE REPAIR OR PERFORMANCE OF THIS PRODUCT INCLUDING EQUIPMENT DOCUMENTATION AND SOFTWARE IN NO EVENT SHALL THE LIABILITY OF ACUMEN INSTRUMENTS CORPORATION ARISING IN CONNECTION WI
56. tion So when a DTE devices drives RTS at 9 50V it is signaling the DCE to stop sending data A few devices particularly devices that communicate at low data rates or over short cables bypass the voltage conversion altogether These devices often require computer interface kits that are really no more than a level converter in a box These serial ports are often referred to as TTL RS 232 CMOS RS 232 or 5 Volt RS 232 ports and require level converters to interact with computers and other serial devices 45 DataBridge SDR Electrical Specifications C 1 Power requirements DataBridge SDR itself requires only a regulated 5VDC power source Additional power requirements depend on the installed recording media A typical hard disk requires 5 15W during operation after spinup Some disks require 5VDC while others require both 5VDC and 12VDC power Solid state disks require 2W 112 MB model at 5VDC which keeps power requirements for the entire system to a single 5VDC supply The Iomega Zip drive requires only 5VDC Table C 1 outlines power consumption with an lomega Zip drive installed DataBridge SDR circuit board 5VDC 60mA DataBridge SDR with lomega Zip Drive Stop mode 5VDC 550mA avg 1200mA peak Play mode 5VDC 800mA avg 1200mA peak Record mode 5VDC 800mA avg 1200mA peak Table C 1 DataBridge SDR power consumption with lomega Zip drive installed 41 Dat
57. witch 1 26 5 1 2 Enabling configuration port handshaking switch 2 26 5 1 3 Reserved switches switches 3 and Ai 26 5 1 4 Displaying and hiding menus switch bi 26 5 1 5 Disabling buttons switch 6 26 5 1 6 Disabling indicators switch Z A 26 5 1 7 Disabling resume mode switch 9 26 5 1 8 Initiator D switch Dita ls 27 5 1 9 Setting configuration port baud rate switches 10 12 27 Table Of Contents DataBridge SDR U ser s M anual rev 1 2 Troubleshooting EE 29 6 1 Frequently Asked Questions FAQ men nenea 29 Service and SUPRA camarada B bb aia 33 7 1 Contacting Acumen Instruments Corporation w w wmmemmmammwa 33 s Technical Supporti e a aae ls 33 7 1 2 Mail 33 74 9 Ezm ailz A ete 34 7 1 4 World Wide Web WA KA malen 34 7 2 Returning Equipment iieri aae saat ieaie ep a Eae Tae aia eaaa 34 1 3 E Tu ire a ia 34 73 41 One year warranty uiae ee dt a ai t 34 Ke H ele 34 133 Limitations oir da ie a Dus 35 DataBridge SDR Evaluation ki 37 ya wa MER e UE 37 O Ge Lu TEE 38 A 2 1 Accessing DIP switches and RTC battery 38 A3 Real panel EE 39 Serial e ee ae a cg ttn a Ca ia an iti 41 B 1 Serial specifications A 41 Bi2 Data rato eet ert Ai eae ee deers eee 41 B 2 1 Data rates and the UART ceea nenea ae 42 B 3 More asynchronous serial parameters A 43 B 3 1 DIE and DGE uini nie uet 43 B3 2 Handshaking
58. yte message once per second In this case the average byte rate data loss when using is simply 10 bytes second and the maximum disk access time becomes 22 4 slow media seconds If your maximum disk access time exceeds your media s worst case access time you can expect occasional data loss 15 O perating D ataBridge SDR DataBridge SDR U ser s M anual rev 1 2 3 3 Play mode When you press the play button while in Stop mode DataBridge SDR attempts to find the specified file and open it If it exists D ataBridge SDR enters Play mode and transmits data via the serial port for viewing downloading using your communications software s ASCII download feature or even simulating the serial device for use with its software F or example you could record position data from a GPS receiver using D ataBridge SDR then use Play mode to plot the data with G PS ready mapping software as if the receiver were connected to the computer Playback continues until D ataBridge SDR reaches the end of the current file or you press the stop button You can also hold the ct r1 key and press c Ctxr1 c to stop data playback Once D ataBridge SDR reaches the end of the file you must press the stop button to return to Stop mode This gives you the opportunity to stop your ASCII download and or save your data before the menu is displayed 3 4 Real time clock considerations The real time clock D ataBridge SDR uses a small lithium battery to maintain time when
59. zing disk partitioning schemes DataBridge SDR supports both extended and primary FAT and VFAT partitions but always reads and writes files in the first partition it recognizes as FAT or VFAT 3 2 6 Considerations for slow devices M ass storage devices particularly low power and removable devices sometimes suffer from slow disk access times It is important to note that access times quoted by manufacturers are averages A worst case access time can be ten times the number specified For instance a drive with a 25 millisecond average access time may sometimes require 250 milliseconds or more to access a sector D ataB ridge SDR includes a 224 byte character buffer to store characters received during slow disk accesses The maximum disk access time before DataBridge SDR asserts its handshaking signalor characters are lost can be calculated using E quation 3 1 224bytes average byte rate max Equation 3 1 Maximum disk access time The average byte rate for a serial data source that transmits data continuously given in Equation 3 2 bits 9 1 byte second 10 bits average byte rate Equation 3 2 Average byte rate Enable hardware So if a data source transmits data continuously at 9600 bps the maximum handshaking on disk access time is approximately 240 ms DataBridge SDR and your serial data source M ost data sources transfer data in short bursts For example a device may when possible to avoid send a 10 b

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