Single-Port PCI Card— RS-232/422/485/530
Contents
1. 4 9 4 3 0 i OO 3411 13 sd El Cl eds SINGLE PORT PCI CARD RS 232 422 485 530 3 Card Setup 3 1 RS 485 Enable Modes RS 485 is ideal for multidrop or network environments It requires a tri state driver that will allow the electrical presence of the driver to be removed from the line The driver is in a tri state or high impedance condition when this occurs Only one driver may be active at a time and the other drivers must be tri stated The output modem control signal Request To Send RTS is typically used to control the state of the driver Some communication software packages refer to RS 485 as RTS enable or RTS block mode transfer One of the unique features of the Single Port PCI Card is the ability to be RS 485 compatible without the need for special software or drivers This ability is especially useful in Windows Windows NT and OS 2 environments where the lower level I O control is abstracted from the application program This ability means that you can effectively use the Single Port PCI Card in an RS 485 application with existing standard RS 232 software drivers Header E4 is used to control the RS 485 mode functions for the driver circuit The selections are Auto enable marked AT The Auto enable feature automatically enables disables the RS 485 interface via on board circuitry RTS enable marked RT The RTS mode uses the RTS modem control signal to enable the RS 485 inter2. BLACK BOX PUMA 0 00 0 00 0 0 O aii i NOVEMBER 2001 I1C073C I1C074C R2 Single Port PCI Card RS 232 422 485 530 CUSTOMER Order toll free in the U S 24 hours 7 A M Monday to midnight Friday 877 877 BBOX SUPPORT FREE technical support 24 hours a day 7 days a week Call 724 746 5500 or fax 724 746 0746 INFORMATION Mail order Black Box Corporation 1000 Park Drive Lawrence PA 15055 1018 Web site www blackbox com E mail info blackbox com TRADEMARKS TRADEMARKS USED IN THIS MANUAL OS 2 and PS 2 are registered trademarks of International Business Machines Corporation Windows and Windows NT are registered trademarks of Microsoft Corporation UL is a registered trademark of Underwriters Laboratories Incorporated Any other trademarks used in this manual are acknowledged to be the property of the trademark owners SINGLE PORT PCI CARD RS 232 422 485 530 FEDERAL COMMUNICATIONS COMMISSION AND INDUSTRY CANADA RADIO FREQUENCY INTERFERENCE STATEMENTS This equipment generates uses and can radiate radio frequency energy and if not installed and used properly that is in strict accordance with the manufacturer s instructions may cause interference to radio communication It has been tested and found to comply with the limits for a Class A computing device in accordance with the specifications in Subpart B of Part 15 of FCC rules which are designed to provide reasonable protection against such interference whe
3. Cala Da CR O ideada 24 Ad Spin and Packaging anna 20 Appendix Ta Fe Ctra POV Ci ACG traca 26 AN A T A E 26 A O ia 26 D5 e A bnew dues deseoneeanoounan E A A O E A TT 27 DER a EA E O 27 Appendix C Asynchronous COMMuUNICAatIon strain 28 Appendix De Block Diara serenos anri i oa 30 CHAPTER 1 Specifications 1 Specifications Communications Chip IC073C 16550 IC074C R2 16850 Number of Ports Single RS 232 422 485 530 Maximum Data Rate 460 8 kbps Maximum Data Distance 5000 feet 1524 m RS 422 Connectors 1 DB25 male Temperature Range Operating 32 to 122 F 0 to 50 C Storage 4 to 158 F 20 to 70 C Humidity Range 10 to 90 noncondensing MTBF gt 150 000 hours Board Construction Built to UL 94V0 rating 100 electrically tested Boards are solder mask over bare copper or solder mask over tinned nickel Power Consumption 5V 130 mA 12V 30 mA 12V 40 mA Size 3 5 H x 4 9 L 8 9 x 12 4 cm Weight lt 1 lb lt 0 5 kg SINGLE PORT PCI CARD RS 232 422 485 530 2 Introduction 2 1 Overview The Single Port PCI Card RS 232 422 485 530 is a one channel PCI Bus serial I O adapter for PCs It provides one field selectable RS 232 422 485 530 serial port supporting asynchronous data rates up to 460 8 kbps as well as isochronous data rates up to the speed of the supplied clock With this card you can use your standard communications software and connect ov
4. with RS 422 however it is optimized for party line or multidrop applications The output of the RS 422 485 driver can be Active enabled or Tri State disabled This capability allows multiple ports to be connected in a multidrop bus and selectively polled RS 485 allows cable lengths up to 4000 feet about 1200 meters and data rates up to 10 Mbps 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 which makes it ideal for multidrop or network environments Its tri state driver not dual state allows the electrical presence of the driver to be removed from the line Only one driver may be active at a time the other drivers 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 or a set of modem control signals B 4 RS 530 RS 530 EIA 530 compatibility means that RS 422 signal levels are met and the pinout for the DB25 connector is specified The EIA Electronic Industry Association created the RS 530 specification to detail the pinout and define a ful
5. 2 PARA RAS N C17 a See O SB EB B E C18 A os ss OB MADE IN USA U8 P1 Appendix D Block Diagram 4 9 S amp S ye Fa Ww e lt F CN gt vr CN 4 T UM a a am aos lt Wd U a aos a7 LL O UN 3 175 lt BLACK BOX O Copyright 2001 Black Box Corporation All rights reserved 1000 Park Drive e Lawrence PA 15055 1018 e 724 746 5500 e Fax 724 746 0746
6. ER 2 Introduction 2 3 Technical Description The Single Port PCI Card provides an additional asynchronous serial port that can be set as RS 232 for modems printers and plotters or RS 422 485 530 for industrial automation and control applications The Single Port PCI Card uses the 16550 UART This chip features programmable baud rates data format interrupt control and 16 byte input and output FIFO An optional upgrade IC074C R2 gives the Single Port PCI Card an Oxford Semiconductor 16850 UART This chip features a deep FIFO 128 bytes transmit and receive automatic RS 485 driver enable and the ability to receive a clock for isochronous communications For a 16850 UART upgrade call Black Box at 724 746 5500 and request part number IC074C R2 2 3 1 ISOCHRONOUS COMMUNICATIONS In synchronous communication data transmission depends on both ends being synchronized to a single clock In asynchronous communication there is no clock instead each data bit is surrounded by a frame of start stop and parity bits In isochronous communication the framing bits of asynchronous communication are combined with the synchronized clock of synchronous communication This scheme allows for much higher data rates and the use of digital lines such as ISDN or T1 where a clock is supplied for data multiplexing Now with a simple communications interface that responds to standard communication calls high speed communications can be accompli
7. NT the diagnostic tool WinSSD is installed in the Black Box folder on the Start Menu during the setup process First find the ports using the Device Manager then use WinSSD to verify that the ports are functional 7 Always use the Serial Utility diagnostic software when troubleshooting a problem This will help eliminate any software issues and identify any hardware conflicts nn MA SINGLE PORT PCI CARD RS 232 422 485 530 A 2 PCI COM Number Selection in Windows 95 98 When you install the Single Port PCI Card in a Windows 95 or 98 system Windows will assign the port number COM5 to it if no other COM5 exists If you want the Card to use another COM number you can change the setting in the Windows Control Panel For example to change the port number to COM3 press the Start button choose Settings and choose Control Panel Double click on the System icon In the System Properties box choose the Device Manager tab and double click on the Multi Function Adapter heading Uncheck the Use Automatic Settings box Two I O ranges will be listed The first should not be changed it s for the PCI bus Double click on the second I O range Highlight the entire range and type 03e8 03ef for COM3 Click OK Windows will inform you that you have made modifications that may affect other devices Click OK The address has been changed to COM3 A 3 Calling Black Box If you determine that your Single Port PCI Card is malfunctioning d
8. a modem control signal or the clock option are E5 E6 and E7 The following examples describe each setting Figure 3 12 Header E5 Modem Control Signal DSR Selected as Input Figure 3 13 Header E5 Clock Signal RXC Selected as Input SINGLE PORT PCI CARD RS 232 422 485 530 SEE RA Figure 3 14 Header E6 Modem Control Signal RI Selected as Input WAS RA Figure 3 15 Header E6 Clock Signal TXC Selected as Input OTR SEN Figure 3 16 Header E7 Modem Control Signal DTR Selected as Output gt CHAPTER 3 Card Setup UN TU IM RS DIR ISE Figure 3 17 Header E7 Clock Signal TSET Selected as Output SINGLE PORT PCI CARD RS 232 422 485 530 A Installation 4 1 Operating System Installation Install the proper software for your Card before installing the hardware For the IC073C refer to the Serial Utility software for instructions 4 2 System Installation The Single Port PCI Card can be installed in any PCI expansion slot and contains several jumper straps for each port that must be set for proper operation l 2 Turn off PC power Disconnect the power cord Remove the cover of the PC case Locate an available PCI slot and remove the blank metal slot cover Gently insert the Single Port PCI Card into the slot Make sure that the card is seated properly Replace the screw Replace the cover Connect the power cord Installation is complete Appendix A Troub
9. al and light industry e 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 you may be required to take adequate measures Always use cabling provided with this product if possible If no cable is provided or if an alternate cable is required use high quality shielded cabling to maintain compliance with FCC EMC directives SINGLE PORT PCI CARD RS 232 422 485 530 Contents Chapter Page T SPee ito J0 1 PAE e ereener en eee ey et ere ee ee ee I 2 DO ON ra tii 8 2 CNC cl E E A mmr E EE E ner tte 8 za Whats TCI Ui oidos 8 2o Techical Desc DUO rai 9 2 3 1 Isochronous Communications andanada 9 2002 Connector PM ASSIS AMICUS used 10 Sd MATI e E E A E E 12 al o AAA oi o Oa EE La 3 2 Address and IRQ Selection cid encriic dones 14 oo Lie lernninatolieinnr n AT E E 15 3A Electrical Interface Selection ovicom ete tocaron acido eran ccaeodl 16 a lock Modesto ota 17 3 6 Baud Rates and Divisors for the Div1 Mode cococnoccncncnonnnonnnononananannncnonannnos 18 3 7 Isochronous Clocking UM CUS osito as 19 bat rollo y A A E uo o 22 Al Operating System Hostal roo 22 42 oyster ls AAA E i II ae Appendik A Troubleshooting ai 23 Ad Usne scnal Ii SONWALG pidan 23 A 2 PCI COM Number Selection in Windows 95 98 c occoccnccnncnnccnccnoconeninonccnacnns 24 AL
10. are DTE most modems and other peripherals are DCE Normally an RS 232 connection is between a DTE and a DCE any other connection requires a special cross pinned cable RS 232 is an unbalanced interface which means that there is a single signal ground for all the electrical signals That limits the possible speed and distance B 2 RS 422 The RS 422 specification defines the electrical characteristics of balanced voltage digital interface circuits RS 422 is a differential interface that defines voltage levels and driver receiver electrical specifications On a differential interface logic levels are defined by the difference in voltage between a pair of outputs or inputs In contrast a single ended interface for example RS 232 defines the logic levels as the difference in voltage between a single signal and a common ground connection Differential interfaces are typically more immune to noise or voltage spikes that may occur on the communication lines Differential interfaces also have greater drive capabilities that allow for longer cable lengths RS 422 is rated up to 10 Mbps and can have cabling 4000 feet long about 1200 meters RS 422 also defines driver and receiver electrical characteristics that will allow one driver and up to 32 receivers on the line at once The signal levels range from 0 to 5 volts RS 422 does not define a physical connector APPENDIX B Electrical Interface B 3 RS 485 RS 485 is backward compatible
11. er a clocked digital communications line Configure the port as RS 232 for standard serial COM port requirements Choose the RS 422 mode for long distance device connections up to 4000 feet 1219 2 m where noise immunity and high data integrity are essential Select RS 485 and capture data from multiple peripherals in a RS 485 multidrop network Up to 31 RS 485 devices can be connected to each port to automate your data collection In both RS 232 and RS 422 modes the card works seamlessly with the standard operating system serial driver In RS 485 mode our special auto enable feature allows the RS 485 ports to be viewed by the operating system as a COM port This allows the standard COM driver to be used for RS 485 communications Our on board hardware automatically handles the RS 485 driver enable The standard version IC073C has a 64 byte FIFO A UART upgrade is available 1C0 74C R2 providing a 128 byte FIFO 2 2 What s Included The Single Port PCI Card RS 232 422 485 530 IC073C is shipped with the following items If any items are missing or damaged call us e Single Port PCI Card RS 232 422 485 530 e Serial Utility Software on two 3 5 disks e This User s Manual The Single Port PCI Card 16850 UART Upgrade RS 232 422 485 530 IC074C R2 is shipped with the following items If any items are missing or damaged call us e The UART 16850 chip mounted on the Single Port PCI Card e This User s Manual _ D CHAPT
12. face and provides backward compatibility with existing software problems DTR enable marked DT The DTR mode uses the DTR modem control signal to enable the RS 485 interface provides backward compatibility with existing software products and with the Oxford Semiconductor 16850 RS 485 enable feature Output One enable marked OP This mode uses the OP1 control signal to enable the RS 485 interface and provides backward compatibility with existing software products and with the 16C850 RS 485 enable feature No Echo marked NE is used to control the RS 485 enable disable functions for the receiver circuit and determine the state of the RS 422 485 driver The RS 485 Echo is the result of connecting the receiver inputs to the transmitter outputs Every time a character is transmitted it is also received This can be beneficial if the software can handle echoing using received characters to throttle the gt CHAPTER 3 Card Setup transmitter but it can confuse the system if the software does not To select the No Echo mode select the position marked NE RS 485 MODE EXAMPLES HEADER E4 Figure 3 3 Header E4 RS 485 Auto Enabled with Echo MA SINGLE PORT PCI CARD RS 232 422 485 530 Figure 3 6 Header E4 RS 485 DTR Enabled with No Echo 3 2 Address and IRQ Selection The Single Port PCI Card is automatically assigned I O addresses and IRQs by your motherboard BIOS Only the I O address may be
13. jetos colocados sobre o contra ellos poniendo particular atenci n a los contactos y receptaculos donde salen del aparato El equipo el ctrico debe ser limpiado nicamente de acuerdo a las recomendaciones del fabricante En caso de existir una antena externa deber ser localizada lejos de las lineas de energia El cable de corriente deber ser desconectado del cuando el equipo no sea usado por un largo periodo de tiempo Cuidado debe ser tomado de tal manera que objectos liquidos no sean derramados sobre la cubierta u orificios de ventilaci n Servicio por personal calificado deber ser provisto cuando A El cable de poder o el contacto ha sido da ado u B Objectos han ca do o l quido ha sido derramado dentro del aparato o C El aparato ha sido expuesto a la lluvia o D El aparato parece no operar normalmente o muestra un cambio en su desempe o o E El aparato ha sido tirado o su cubierta ha sido da ada TOS CE Compliance 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 e EN55022 Class A Limits and methods of measurement of radio interference characteristics of information technology equipment e EN50082 1 Electromagnetic compatibility Generic immunity standard Part 1 Residential commerci
14. l set of modem control signals that can be used for regulating flow control and line status Like RS 232 the RS 530 specification defines two types of interface circuits Data Terminal Equipment DTE and Data Circuit Terminating Equipment DCE The Single Port PCI Card is a DTE interface SINGLE PORT PCI CARD RS 232 422 485 530 Appendix C Asynchronous Communication In serial data communication 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 communication 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 start bit followed by a predefined number of data bits 5 6 7 or 8 defines character boundaries for asynchronous communications The end of the character is defined by the transmission of a predefined number of stop bits usually 1 1 5 or 2 Odd Idle State Even Remain Idle of or or Li Unused Next Start Bit hg lt 4 5 to 8 Data Bits 7 i 1 AE es I I I I I I I l Pa
15. l interface Figure 3 9 Headers El amp E2 RS 422 485 Selected CHAPTER 3 Card Setup 3 5 Clock Modes The Single Port PCI Card employs a unique clocking option that allows you to select from divide by 4 and divide by 1 clocking modes These modes are selected at Header E8 To select the baud rates commonly associated with COM ports 2400 4800 9600 19 2 115 2 kbps place the jumper in the divide by 4 mode marked DIV4 Figure 3 10 Clocking Mode Divide By 4 To select the maximum data rate 460 8 kbps place the jumper in the divide by 1 marked DIV1 position Figure 3 11 Clocking Mode Divide By 1 SINGLE PORT PCI CARD RS 232 422 485 530 3 6 Baud Rates and Divisors for the Div1 Mode The following table shows some common data rates and the rates you should choose to match them if using the adapter in the Divl1 mode If your communications package allows the use of baud rate divisors choose the appropriate divisor from the following table For this data rate choose this divisor 57 6 kbps 115 2 kbps 230 4 kbps 84 48 24 12 4 2 38 4 kbps 2 460 8 kbps CHAPTER 3 Card Setup 3 7 Isochronous Clocking Jumpers The Oxford Semiconductor 16850 allows for the reception of both the transmit and the receive clocks for isochronous communications for a discussion of isochronous clocking refer to Section 2 3 1 The three headers that allow the selection of either
16. leshooting A 1 Using Serial Utility Software Serial Utility test software is supplied with the card and will be used in the troubleshooting procedures By using this software and following these simple steps most common problems can be eliminated without calling Technical Support 1 Identify all I O adapters currently installed in your system This includes your on board serial ports controller cards sound cards etc The I O addresses used by these adapters as well as the IRQs if any should be identified 2 Configure your card so that there is no conflict with currently installed adapters No two adapters can occupy the same I O address 3 Make sure the card is using a unique IRQ If it is not you will have to change the IRQ of some other I O adapter The IRQ is typically selected via an on board header block The IRQ should rarely be the problem since the Single Port PCI Card s IRQ is assigned automatically 4 Make sure the card is securely installed in a motherboard slot 5 When running DOS Windows 3 x or other operating systems refer to the Serial Utilities software for that operating system and the user manual to verify that the card is configured correctly The supplied software contains a diagnostic program SSD that runs under DOS and will verify if an adapter is configured properly Refer to the DIAG TXT file in the DOS DIAG directory for detailed instructions on using SSD 6 For Windows 95 98 and Windows
17. modified by the user Adding or removing other hardware may change the assignment of I O addresses and IRQs CHAPTER 3 Card Setup 3 3 Line Termination Typically each end of the RS 485 bus must have line terminating resistors RS 422 terminates at the receive end only A 120 ohm resistor is across each RS 422 485 input in addition to a 1K ohm pull up pull down combination that biases the receiver inputs Header E3 allows customization of this interface to specific requirements Each jumper position corresponds to a specific portion of the interface If multiple Single Port PCI Cards are configured in a RS 485 network only the boards on each end should have jumpers T P and P On Refer to the table below for each position s function Adds or removes the 1K ohm pull down resistor in the RS 422 RS 485 receiver circuit Receive data only Adds or removes the 1K ohm pull up resistor in the RS 422 RS 485 receiver ME circuit Receive data only Adds or removes the 120 ohm termination Connects the TX to RX for RS 485 two wire operation Connects the TX to RX for RS 485 two wire operation Figure 3 7 Header E3 Line Termination SINGLE PORT PCI CARD RS 232 422 485 530 3 4 Electrical Interface Selection Each port on the Single Port PCI Card can be used in either RS 232 or RS 422 485 530 This is selectable via two 24 pin DIP shunts at El and E2 Use the following illustrations to help you configure your electrica
18. n the equipment is operated in a commercial environment Operation of this equipment in a residential area is likely to cause interference in which case the user at his own expense will be required to take whatever measures may be necessary to correct the interference Changes or modifications not expressly approved by the party responsible for compliance could void the user s authority to operate the equipment This digital apparatus does not exceed the Class A limits for radio noise emission from digital apparatus set out in the Radio Interference Regulation of Industry Canada Le pr sent appareil num rique n met pas de bruits radio lectriques d passant les limites applicables aux appareils num riques de la classe A prescrites dans le R glement sur le brouillage radio lectrique publi par Industrie Canada 10 ll NORMAS OFICIALES MEXICANAS NOM ELECTRICAL SAFETY STATEMENT INSTRUCCIONES DE SEGURIDAD Todas las instrucciones de seguridad y operaci n deber n ser le das antes de que el aparato el ctrico sea operado Las instrucciones de seguridad y operaci n deber n ser guardadas para referencia futura Todas las advertencias en el aparato el ctrico y en sus instrucciones de operaci n deben ser respetadas Todas las instrucciones de operaci n y uso deben ser seguidas El aparato el ctrico no deber ser usado cerca del agua por ejemplo cerca de la tina de ba o lavabo s tano mojado
19. o cerca de una alberca etc El aparato el ctrico debe ser usado nicamente con carritos o pedestales que sean recomendados por el fabricante El aparato el ctrico debe ser montado a la pared o al techo s lo como sea recomendado por el fabricante Servicio El usuario no debe intentar dar servicio al equipo el ctrico m s all a lo descrito en las instrucciones de operaci n Todo otro servicio deber ser referido a personal de servicio calificado El aparato el ctrico debe ser situado de tal manera que su posici n no interfiera su uso La colocaci n del aparato el ctrico sobre una cama sof alfombra o superficie similar puede bloquea la ventilaci n no se debe colocar en libreros o gabinetes que impidan el flujo de aire por los orificios de ventilaci n El equipo el ctrico deber ser situado fuera del alcance de fuentes de calor como radiadores registros de calor estufas u otros aparatos incluyendo amplificadores que producen calor El aparato el ctrico deber ser connectado a una fuente de poder s lo del tipo descrito en el instructivo de operaci n o como se indique en el aparato o A SINGLE PORT PCI CARD RS 232 422 485 530 12 13 14 15 16 7 18 Precauci n debe ser tomada de tal manera que la tierra fisica y la polarizaci n del equipo no sea eliminada Los cables de la fuente de poder deben ser guiados de tal manera que no sean pisados ni pellizcados por ob
20. o not attempt to alter or repair the unit It contains no user serviceable parts Contact Black Box at 724 746 5500 Before you do make a record of the history of the problem We will be able to provide more efficient and accurate assistance if you have a complete description including e the nature and duration of the problem e when the problem occurs e the components involved in the problem any particular application that when used appears to create the problem or make it worse APPENDIX A Troubleshooting A 4 Shipping and Packaging If you need to transport or ship your Single Port PCI Card e Package it carefully We recommend that you use the original container e If you are shipping the Single Port PCI Card for repair make sure you include everything that came in the original package Before you ship contact Black Box to get a Return Authorization RA number SINGLE PORT PCI CARD RS 232 422 485 530 Appendix B Electrical Interface B 1 RS 232 The standard PC serial port is an RS 232 port with either a DB25 or a DB9 connector Basic RS 232 is capable of data rates up to 20 kbps at distances up to 50 feet about 15 meters Various improvements allow faster speeds on PC serial ports but only over short distances The standard defines two types of RS 232 interfaces DTE Data Terminal Equipment and DCE Data Circuit Terminating Equipment Most computers serial ports including your Single Port PCI Card
21. rity 1 Il ot l l l l l l l l Bit Il l 1 0 O EE ee E E ee ee E E l l Il l l 41 gt ol 4 1 5 gt i 1 tt 2 Stop Bits Figure C 1 Asynchronous Communications Bit Diagram APPENDIX C Asynchronous Communication An extra bit used for error detection is often appended before the stop bits 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 Even Parity or Odd Parity Sometimes parity is not used to detect errors on the data stream This is referred to as No parity C4 RS 232 RS 422 Se Ba o P a al a i P C6 N N Z T P L C8 L C7 S 2 El E2 E4 R6 Ri R1 al BS SS 828 88 66 AT I O wm 20111101111 a E am Ri RI RI RT 16556 PLCC XC9536 7101 R7 SSE SS 538 DT c9 gt gt GLA op CEs Es e7 s BS Se SSS NE RXC DSR TXC RI DTR TSET cap E8 CLOCK DIVIDER R1 R1 R1 R1 R1 R1 R1 R1 Ri R23 DIV1 DIVIDE BY 1 a SSE SS BEEBEE SS 394588 89588 S DIV4 DIVIDE BY 4 te LO Ri Ri Ri Ri R1 Ri Ri RI AI C14 ULUVANVANVAUVUVUAVAOLAVVUUUNTUO TAIN Y1 as SSB SSB BEEBEE SS BEES 28 6 BE A U5 R1 RI U6 Ri RI R36 CY BEBB Seee ae u N Rl RI R39 Soo a E E PC19050 0 HO Baba SSE urg E mM Eee U7 93CS46 C15 C16 R4
22. shed For example say Company A wishes to send daily reports from the London office to its New York office via an established satellite link These links typically require a clock to synchronize data In the past more expensive synchronous interface adapters and custom software would be required Now using the Single Port PCI Card IC073C with the 16850 UART upgrade IC074C R2 you can use any ordinary PC communications software at much higher data rates than are possible via dialup Services SINGLE PORT PCI CARD RS 232 422 485 530 2 3 2 CONNECTOR PIN ASSIGNMENTS Table 2 1 RS 232 Signals DB25 Male Receive Data Note These assignments meet ElA TIA ANSI 232E DTE specifications CHAPTER 2 Introduction Table 2 2 RS 422 485 530 Pin Assignments DB25 Male Nome Mode ee Receive Data Positive 3 RIA DB DA O Cc gt lt CTSB CTS Clear To Send Positive 1 CTSA Clear To Send Negative Tha TXCB TXC Transmit Clock Positive 12 TXCA TXC Transmit Clock Negative 1 RXCB XC Receive Clock Positive D D Q O z 413 X O P RXCA Receive Clock Negative 1 RB Ring Indicator Positive ORA Ring Indicator Negative D 2 2 1 1 1 Note These assignments meet the EIA TIA ANSI 530 DTE specification with the exception of Ring Indicator which is not specified It has been included here for compatibility with systems requiring Ring Indicator 2 2 2 7 6 3 3 5 5 7 5
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