MODEL PCI-422/485-2 USER MANUAL
Contents
1. ted etter 8 Chapter 2 adden 9 Chapter 3 Option ates 11 422148 ded teal 11 Lerminations and Blas ea 11 CLK X Fand GLKXL is ca e dade ane eat 11 Data Cable Wiring 11 bo tal ei ta 12 In Windows 4 Lower Without 12 Figure 3 1 Option Selection 13 Chapter 4 Address Selection kar etn ete 14 Chapter 5 ProgramMing 2 tein i ee ein eit 15 Sample Programs 15 Windows Programming intern 15 15 Table 5 1 Baud Rate Divisors 16 17 17 Chapter 6 Connector Pin Assignment 19 Table 6 1 Connector Pin 19 Appendix A2. 1X FNAHI RX ENASLE RS485 Four Wire Network An RS485 network can also be connected in a four wire mode In a four wire network it s necessary that one node be a master node and all others be slaves The network is connected so that the master communicates to all slaves and all slaves communicate only with the master This has advantages in equipment that uses mixed protocol communications Since the slave nodes never listen to another slave s response to the master a slave node cannot reply incorrectly Customer Comments If you experience any problems with this manual or just want to give us some feedback please email us at manuals accesio com Please detail any errors you find and include your mailing address so that we can send you any manual updates ACCES 1 0 PRODUCTS 10623 Roselle Street San Diego CA 92121 Tel 858 550 9559 FAX 858 550 7322 www accesio com
3. ASCII Carriage Return as an end of transmission marker dof while inporto BASEADDR 5 amp 1 until data ready data i inportb BASEADDR while data i 13 Reads the line until null character rec d Interrupt driven communications should be used whenever possible and is required for high data rates Writing an interrupt driven receiver is not much more complex than writing a polled receiver but care should be taken when installing or removing your interrupt handler to avoid writing the wrong interrupt disabling the wrong interrupt or turning interrupts off for too long a period The handler would first read the Interrupt Identification Register at Base Address 2 If the interrupt is for Received Data Available the handler then reads the data If no interrupt is pending control exits the routine A sample handler written in C is as follows readback inportb BASEADDR 2 if readback amp 4 Readback will be set to 4 if data are available data i inportb BASEADDR outportb 0x20 0x20 Write EOI to 8259 Interrupt Controller return Transmission The Auto feature of the 422 485 2 card automatically enables the transmitter when data are ready to send so no software enabling is required The following software example is for non Auto operation First the RTS line should be set high by writing a 1 to Bit 1 of the Modem Control Register at Base Address 4 The RTS line is us
4. For descriptions and ranges for these values see Regentry hlp the Registry help file on the WindowsNT Workstation Resource Kit CD For example if you have a four port COM card configured to use address OxFFFO with an interrupt of OxFFF8 the values in the Registry are assuming that every port is configured to use the same IRQ and that the addresses are configured to be consecutive and contiguous Serial2 Subkey Serial4 Subkey PortAddress REG_DWORD OxFFFO PortAddress REG_DWORD OxFF90 Interrupt REG_WORD 5 Interrupt REG_DWORD 5 DosDevices REG_SZ COM3 DosDevices REG_SZ COM5 InterruptStatus REG_DWORD OxFFF8 InterruptStatus REG_DWORD OxFFF8 PortIndex REG_DWORD 1 REG_DWORD Serial3 Subkey Serial5 Subkey PortAddress REG_DWORD OxFFEO PortAddress REG_DWORD OxFF80 Interrupt REG_DWORD 5 Interrupt REG_DWORD 5 DosDevices REG_SZ COM4 Dos Devices REG_SZ COM6 InterruptStatus REG_DWORD OxFFF8 InterruptStatus REG_DWORD OxFFF8 PortIndex REG_DWORD 2 PortIndex REG_DWORD 4 Jumpers RS422 RS485 A RS485 B LDO LDI X1 X4 X1 M RS485 B RS485 A Figure 3 1 Option Selection Map Select differential RS 422 four wire communications mode Select differential RS 485 two wire communications mode Apply load to RS 422 output or RS 485 Apply load to RS 422 input Select either 115 2 Kbaud or 460 8 Kbaud maximum Chapter 4 Address Sele
5. The exception is when the line is driven by an RS422 driver that is never tristated or disconnected from the line In this case the driver provides low internal impedance that terminates the line at that end You do not have to add terminator resistor to your cables when you use the PCI 422 485 2 card Termination resistors for the RX and RX lines are provided on the card and are placed in the circuit when you install the termination jumpers Moreover installing the BIAS jumpers properly biases these lines See the Option Selection section of this manual RS485 Data Transmission The RS485 Standard allows a balanced transmission line to be shared in a party line mode As many as 32 driver receiver pairs can share a two wire party line network Many characteristics of the drivers and receivers are the same as in the RS422 Standard One difference is that the common mode voltage limit is extended and is 12V to 7V Since any driver can be disconnected or tristated from the line it must withstand this common mode voltage range while in the tristate condition RS485 Two Wire Multidrop Network The following illustration shows a typical multidrop or party line network Note that the transmission line is terminated on both ends of the line but not at drop points in the middle of the line TERMINATION RESISTORS AT BOTH ENDS ONLY IX ENASL KX Figure A 1 Typical RS485 Two Wire Multidrop Network
6. The popular 9 pin D subminiature connector is used for interfacing to communication lines The connector is equipped with 4 40 threaded standoffs female screw lock to provide strain relief DB 9 Male RS422 Functions RS485 Functions Tx Transmit Data TRx Transmit Receive Data Tx Transmit Data TRx Transmit Receive Data GND Ground GND Ground Rx Receive Data Table 6 1 Connector Pin Assignments Note If connections are to be made to a CE marked version then CE certifiable cabling and breakout methodology Cable shields connected to ground at the mounting bracket shielded twisted pair wiring etc must be used Appendix Application Considerations Balanced Differential Signals The reason that RS422 and RS485 devices can drive long lines with more noise immunity is that a balanced differential drive method is used In a balanced differential system the voltage produced by the driver appears across a pair of wires A balanced line driver will produce a differential voltage from 2 to 6 volts across its output terminals A balanced line driver can also have an input enable signal that connects the driver to its output terminals If the enable signal is OFF the driver is disconnected from the transmission line This disconnected or disabled condition is usually referred to as the tristate condition and represents a high impedance RS485 drivers must have this control capability RS422 drivers may have this contro
7. for this card is 494F ASCII for I O The Device ID code for the card is 1150 PCI supports 64 K of address space so your card s addresses may be located anywhere in the 0000 to FFF8 hex range Chapter 5 Programming Sample Programs There are sample programs provided with the card in C Pascal QuickBASIC and several Windows languages DOS samples are located in the DOS directory and Windows samples are located in the WIN32 directory Windows Programming The card installs into Windows as COM ports Thus the Windows standard API functions can be used In particular CreateFile and CloseHandle for opening and closing a port SetupComm SetCommTimeouts GetCommState and SetCommState to set and change a port s settings ReadFile WriteFile for accessing a port See the documentation for your chosen language for details Under DOS the process is very different The remainder of this chapter describes DOS programming Initialization Initializing the chip requires knowledge of the UART s register set The first step is to set the baud rate divisor You do this by first setting the DLAB Divisor Latch Access Bit high This bit is Bit 7 at Base Address 3 In C code the call would be outportb BASEADDR 3 0x80 You then load the divisor into Base Address 0 low byte and Base Address 1 high byte The following equation defines the relaionship between baud rate and divisor Desired Baud Rat
8. is found to be defective will be repaired or replaced subject to the following considerations Terms and Conditions If a unit is suspected of failure contact ACCES Customer Service department Be prepared to give the unit model number serial number and a description of the failure symptom s We may suggest some simple tests to confirm the failure We will assign a Return Material Authorization RMA number which must appear on the outer label of the return package All units components should be properly packed for handling and returned with freight prepaid to the ACCES designated Service Center and will be returned to the customer s user s site freight prepaid and invoiced Coverage First Three Years Returned unit part will be repaired and or replaced at ACCES option with no charge for labor or parts not excluded by warranty Warranty commences with equipment shipment Following Years Throughout your equipment s lifetime ACCES stands ready to provide on site or in plant service at reasonable rates similar to those of other manufacturers in the industry Equipment Not Manufactured by ACCES Equipment provided but not manufactured by ACCES is warranted and will be repaired according to the terms and conditions of the respective equipment manufacturer s warranty General Under this Warranty liability of ACCES is limited to replacing repairing or issuing credit at ACCES discretion for any products which are proved to be defective durin
9. the computer cover 4 Carefully install the card an available 5V or 3 3V PCI expansion slot may need to remove a backplate first 5 Inspect for proper fit of the card and tighten screws Make sure that the card mounting bracket is properly screwed into place and that there is a positive chassis ground 6 Install an I O cable onto the card s bracket mounted connector 7 Replace the computer cover and turn ON the computer which should auto detect the card depending on the operating system and automatically finish installing the drivers 8 Run PClfind exe to complete installing the card into the registry for Windows only and to determine the assigned resources 9 Run one of the provided sample programs that was copied to the newly created card directory from the CD to test and validate your installation The base address assigned by BIOS or the operating system can change each time new hardware is installed into or removed from the computer Please recheck PCIFind or Device Manager if the hardware configuration is changed Software you write can automatically determine the base address of the card using a variety of methods depending on the operating system In DOS the PCNSOURCE directory shows the BIOS calls used to determine the address and IRQ assigned to installed PCI devices In Windows the Windows sample programs demonstrate querying the registry entries created by PCIFind and NTIOPCI SYS during boot up to determin
10. Application 5 20 Balanced Differential Signals 20 Table 1 RS422 Specification 20 RS485 Data 21 RS485 Two Wire Multidrop Network 21 Figure 1 Typical RS485 Two Wire Multidrop 21 RS485 Four Wire Multidrop Network 22 Chapter 1 Introduction This Serial Communications Card was designed for use in PCl Bus computers and provides two serial ports for effective communication in the most common protocols The card is 6 15 inches long 156 mm and may be installed in any 5 volt PCI slot in IBM or compatible computers Multi Protocol Operation These are dual protocol serial cards that support RS422 and RS485 communications RS422 uses differential or balanced line drivers to improve noise immunity and increase the maximum distance to 4000 feet RS485 improves on RS422 with switchable transceivers and the ability to support multiple devices on a single party line The RS485 specification defines a maximum of 32 devices on a single line The number of devices served on a single line can be expanded by use of repeaters RS485 and RS422 Balanced Mode Operation The cards support RS422 and RS485 modes which use differential balanced drivers for increased range and noise imm
11. al shutdown Communication Modes The cards support Half Duplex and Full Duplex communications in 2 and 4 wire cable connections Half Duplex allows traffic to travel in both directions but only one way at a time In Full Duplex operation data travels in both directions at the same time RS485 communications use the half duplex mode because only a single pair of wires need to be used and installation costs are dramatically reduced RTS Auto Transceiver Control In RS485 communications the driver must be enabled and disabled as needed allowing all cards to share a two wire cable This card provides automatic control where the driver is enabled when data is ready to be transmitted The driver remains enabled for the transmission time of one additional character after data transfer is complete and then is disabled The cards automatically adjust their timing to the baud rate of the data The receiver is also normally disabled during RS485 transmissions CE Mark If your card is CE marked it meets the requirements of EN50081 1 1992 Emissions EN50082 1 1992 Immunity and EN60950 1992 Safety Specification Communications Interface e Serial Ports Character length Parity Stop Interval Serial Data Rates Shielded male D sub 9 pin IBM AT style connectors compatible with RS422 and RS485 specifications 5 6 7 or 8 bits Even odd or none 1 1 5 or 2 bits Up to 115 200 baud asynchronous A faster rang
12. ction The card uses two separate address spaces each occupying eight consecutive register locations for COM and COM respectively PCI architecture is Plug and Play This means the BIOS or Operating System determines the resources assigned to PCI cards rather than you selecting these resources with switches or jumpers As a result the card s base address cannot be changed it can only be determined To determine the base address that has been assigned to the card run the provided PCIFind EXE utility program PCINT EXE for Windows95 systems This utility will display a list of all of the ACCES cards detected on the PCI bus the addresses assigned to each function on each of the cards and the respective IRQs and DMAs if any allotted Alternatively some operating systems Windows 95 98 2000 can be queried to determine which resources were assigned In these operating systems you can use either or the Device Manager utility from the System Properties Applet of the control panel These cards are installed in the Data Acquisition class of the Device Manager list Selecting the card then clicking Properties then selecting the Resources Tab will display a list of the resources allocated to the card PCIFind uses the Vendor ID and the device ID to search for your card then reads the base address and IRQ assigned If you want to determine the base address and IRQ assigned use the following information The Vendor ID code
13. e UART clock frequency 32 divisor When the BAUD jumper is in the X1 position the UART clock frequency is 1 8432MHz When the jumper is in the X4 position the clock frequency is 7 3728 MHz The following table lists popular divisor frequencies Note that there are two columns to consider depending on the position of the BAUD jumper Baud Rate Divisor x1 Divisor x4 Max Diff Cable Length 460800 1 550 ft 230400 2 1400 ft 153600 3 2500 ft 115200 1 4 3000 ft 57600 2 8 4000 ft 38400 3 12 4000 ft 28800 4 16 4000 ft 19200 6 24 4000 ft 14400 8 32 4000 ft 9600 12 48 Most Common 4000 ft 4800 24 96 4000 ft 2400 48 192 4000 ft 1200 96 384 4000 ft Recommended maximum distances for differentially driven data cables RS422 or RS485 are for typical conditions Table 5 1 Baud Rate Divisors In C the code to set the chip to 9600 baud is outportb BASEADDR 0x0C outportb BASEADDR 1 0 The second initializing step is to set the Line Control Register at Base Address 3 This register defines word length stop bits parity and the DLAB Bits 0 and 1 control word length and allow word lengths from 5 to 8 bits Bit settings are extracted by subtracting 5 from the desired word length Bit 2 determines the number of stop bits There can be either one or two stop bits If Bit 2 is set to 0 there will be one stop bit If Bit 2 is set to 1 there will be two stop bi
14. e of rates up to 460 800 baud is achieved by jumper selection on the card Type 16550 buffered UART Caution The 2 bit of the UART must be set low for proper interrupt driven communication This bit enables or disables the interrupts and the card will not communicate if the bit is pulled high Differential Communication Mode Multipoint Receiver Input Sensitivity Common Mode Rejection Compatible with RS422 and RS485 specifications Up to 32 drivers and receivers allowed on line Serial communications ACE used is type 16550 Driver Receivers used are type 75176 200 mV differential input 12V to 7V Transmitter Output Drive Capability 60 mA Environmental e e Operating Temperature Range 0 C to 60 C Storage Temperature Range Humidity Power Required Size 50 C to 120 C 5 to 95 non condensing 5VDC at 125 mA typical 12VDC at 5 mA typical 685 mW total power consumption 6 1 2 long 165 mm by 3 7 8 98 mm COMPUTER BUS OSCILLATOR UART 16550 OR SIMILAR TRANSCEIVER IRQ Auto CIRCUITRY Figure 1 1 Block Diagram Chapter 2 Installation A printed Quick Start Guide QSG is packed with the card for your convenience If you ve already performed the steps from the QSG you may find this chapter to be redundant and may skip forwa
15. e this same information Windows COM Numbers Under Windows 9x the will typically install as COM5 and COM6 Using Device Manager these assignments can be changed to any available COM number greater than limitations in the Microsoft COM drivers prevent PCI COM ports from appearing as COM1 COM2 Under Windows NT 2000 and NT XP the card will typically install as COM3 and COM4 Using Device Manager these assignments can be changed to any available COM number Under Windows and lower PCIFind EXE will typically install the card 5 COM6 Because this is not PNP compliant OS PCIFind EXE will place itself in the system registry to update the installation should the card move for example if another PCI card is installed or be removed In order to change the COM number assignment PCIFind EXE must be removed from the registry which will also sacrifice its pseudo PNP behavior please contact the factory for further assistance if this is desired Input Output Connections Two DB9 connectors are provided on the card mounting bracket for input output connections To ensure that there is minimum susceptibility to EMI and minimum radiation it is important that the card mounting bracket be properly screwed into place and that there be a positive chassis ground Also proper EMI cabling techniques cable connect to chassis ground at the aperture shielded twisted pair wiring etc be u
16. ed to toggle the transceiver from receive mode to transmit mode and vice versa It is not carried out on the line in RS485 and is not used for handshaking Similarly the CTS line is not used in RS485 and should always be enabled by installing a jumper as described earlier After the above is done the card is ready to send data To transmit a string of data the transmitter must first check Bit 5 of the Line Status Register at Base Address 5 That bit is the transmitter holding register empty flag If it is high the transmitter has sent the data The process of checking the bit until it goes high followed by a write is repeated until no data remains After all data has been transmitted the RTS bit should be reset by writing a 0 to Bit 1 of the Modem Control Register The following code fragment demonstrates this process outportb BASEADDR 4 inporto BASEADDR 4 0x02 Set RTS bit without altering states of other bits while data i While there is data to send while inportb BASEADDR 5 amp 0x20 Wait until transmitter is empty outportb BASEADDR data i j outportb BASEADDR 4 inportb BASEADDR 4 amp 0xFD Reset RTS bit without altering states of other bits Caution The 2 bit of the UART must be set low for proper interrupt driven communication This bit enables or disables the interrupts and the card will not communicate if the bit is pulled high Chapter 6 Connector Pin Assignments
17. g the warranty period In no case is ACCES liable for consequential or special damage arriving from use or misuse of our product The customer is responsible for all charges caused by modifications or additions to ACCES equipment not approved in writing by ACCES or if in ACCES opinion the equipment has been subjected to abnormal use Abnormal use for purposes of this warranty is defined as any use to which the equipment is exposed other than that use specified or intended as evidenced by purchase or sales representation Other than the above no other warranty expressed or implied shall apply to any and all such equipment furnished or sold by ACCES Table Contents Chapter da ade Ady 5 Multi Protocol ade Re 5 RS485 and RS422 Balanced Mode Operation 5 Port Compatibility 4 6 cnc tate aimed waded 5 Communication aisle 5 RTS Auto Transceiver 6 6 needs eth 7 Figure T I Boek Daga eaa a a
18. l but it is not always required A balanced differential line receiver senses the voltage state of the transmission line across the two signal input lines If the differential input voltage is greater than 200 the receiver will provide a specific logic state on its output If the differential voltage input is less than 200 the receiver will provide the opposite logic state on its output The maximum operating voltage range is from 6V to 6V allowing for voltage attenuation that can occur on long transmission cables A maximum common mode voltage rating of 7V provides good noise immunity from voltages induced on the twisted pair lines The signal ground line connection is necessary in order to keep the common mode voltage within that range The circuit may operate without the ground connection but may not be reliable anemone Driver Output Voltage unloaded Driver Output Voltage loaded Driver Output Resistance 500 Driver Output Short Circuit Current 150 Driver Output Rise Time 10 unit interval Receiver Sensitivity 200 Receiver Common Mode Voltage Range Receiver Input Resistance Table A 1 RS422 Specification Summary To prevent signal reflections in the cable and to improve noise rejection in both the RS422 and RS485 mode the receiver end of the cable should be terminated with a resistance equal to the characteristic impedance of the cable
19. rd to begin developing your application The software provided with this card is on CD and must be installed onto your hard disk prior to use To do this perform the following steps as appropriate for your operating system CD Software Installation The following instructions assume the CD ROM drive is drive Please substitute the appropriate drive letter for your system as necessary DOS 1 Place the CD into your CD ROM drive 2 2 to change the active drive to the CD ROM drive 3 to run the install program 4 Follow the on screen prompts to install the software for this board WINDOWS 1 Place the CD into your CD ROM drive 2 The system should automatically run the install program If the install program does not run promptly click START RUN and type 21 10 click or press 3 Follow the on screen prompts to install the software for this board LINUX 1 Please refer to linux htm on the CD ROM for information on installing under linux Caution ESDA single static discharge can damage your card and cause premature failure Please follow all reasonable precautions to prevent a static discharge such as grounding yourself by touching any grounded surface prior to touching the card Hardware Installation 1 Do not install card into the computer until the software has been fully installed 2 Turn OFF computer power AND unplug AC power from the system 3 Remove
20. sed for the input output wiring Chapter 3 Option Selection Operation of the serial communications section is determined by jumper installation as described in the following paragraphs Locations of the jumpers are shown in Figure 3 1 Option Selection at the end of this section of the manual 422 485 Jumpers must be installed in these blocks for each COM port The function of the 422 and 485 jumpers is to configure the port for RS 422 or RS 485 mode communications Either an RS 422 or RS 485 jumper must be used for each channel Terminations and Bias A transmission line should be terminated at the receiving end in its characteristic impedance Installing a jumper at the location labeled LDO applies a 1200 load across the output for RS 422 mode and across the transmit receive input output for RS 485 operation Installing a jumper at the location labeled LDI applies a 1200 load across the input for RS 422 operation The card provides biasing for the RS 485 mode CLK X1 and CLK X4 Placement of this jumper controls baud rate CLK X1 permits baud rates up to 115 2K Baud and CLK X4 permits baud rates up to 460 8K Baud Data Cable Wiring When two numbers are joined together with amp the two pins jumpered together CABLE MODE JUMPERS CARD 1 CARD2 Simplex 2 wire Receive Only 422 Rx 9 2 Rx 1 3 Simplex 2 wire Transmit Only 422 2 9 3 1 Half Duplex 2 wire 485 TRx 2 2 TRx 3 3 Full Duplex 4 wire 422 2 9 T
21. ts Bits 3 through 6 control parity and break enable They are not commonly used for communications and should be set to zeroes Bit 7 is the DLAB discussed earlier It must be set to zero after the divisor is loaded or else there will be no communications The C command to set the UART for an 8 bit word no parity and one stop bit is outportb BASEADDR 3 0x03 The third step of the initialization sequence is to set the Modem Control Register at Base Address 4 Bit 1 is the Request to Send RTS control bit This bit should be left low until transmission time Note When operating in the automatic RS485 mode the state of this bit is not significant Bits 2 and 3 are user designated outputs Bit 2 may be ignored on this card Bit 3 is used to enable interrupts and should be set high if an interrupt driven receiver is to be used The final initialization step is to flush the receiver buffers You do this with two reads from the receiver buffer at Base Address 0 When done the UART is ready to use Reception Reception can be handled in two ways polling and interrupt driven When polling reception is accomplished by constantly reading the Line Status Register at Base Address 5 Bit 0 of this register is set high whenever data are ready to be read from the chip A simple polling loop must continuously check this bit and read in data as it becomes available The following code fragment implements a polling loop and uses a value of 13
22. unity The card also has capability to add bias voltages and to add load resistors to terminate the communications lines RS485 communications requires that one transmitter supply a bias voltage to ensure a known zero state when all transmitters are off Also receiver inputs at each end of the network should be terminated to eliminate ringing These cards support these options by means of jumpers on the card See the Option Selection section of this manual for more details COM Port Compatibility Type 16550 UARTs are used as the Asynchronous Communication Element ACE These include a 16 byte transmit receive FIFO buffer to protect against lost data in multitasking operating systems while maintaining 100 compatibility with the original IBM serial port PCI bus architecture allows addresses between 0000 and FFF8 hex to be assigned to the cards PCIFind EXE is a utility provided to determine the base addresses assigned by the system A crystal oscillator is located on the card This oscillator permits selection of baud rates up to 115 200 Rates up to 460 800 baud 4X UART clock are available by jumper selection The driver receiver used the 75176 is capable of driving extremely long communication lines at high baud rates It can drive up to 60 mA on balanced lines and receive inputs as low as 200 mV differential signal superimposed on common mode noise of 12 V or 7 V In case of communication conflict the driver receivers feature therm
23. x 3 1 Rx 9 2 Rx 1 3 Interrupts Use PCIFind EXE to determine the IRQ that was assigned to the card by the BIOS or Operating System Alternatively in Windows 9x or NT2000 the Device Manager can be used The 422 485 2 s ports are listed under the Ports class Selecting the port clicking Properties then selecting the Resources tab will show the base addresses and IRQ assigned to the port In Windows NT 4 and Lower Without PCIFind EXE In Windows NT changes must be made to the system registry to support IRQ sharing normally detects the COM boards the system and makes these changes but if PCIFind EXE will not be run or is working improperly for some reason these changes must be made manually The following is excerpted from Controlling Multiport Serial Cards provided by Microsoft in the MSDN library documentid mk ivt nt4O0res D15 S55FC HTM also available in the WindowsNT Resource Kit The text enclosed in brackets denotes a comment by the editors The Microsoft serial driver can be used to control many dumb multiport serial cards Dumb indicates that the control includes no on board processor Each port of a multiport card has a separate subkey under the CurrentControlSet Services Serial subkey in the registry In each of these subkeys you must add values for DosDevices Interrupt InterruptStatus PortAddress and because these are not detected by the Hardware Recognizer
24. ya ACCES I O PRODUCTS INC 10623 Roselle Street Diego CA 92121 858 550 9559 FAX 858 550 7322 ontactus accesio com www accesio com MODEL 422 485 2 USER MANUAL FILE MPCI 422 485 2 A1b Notice The information in this document is provided for reference only ACCES does not assume any liability arising out of the application or use of the information or products described herein This document may contain or reference information and products protected by copyrights or patents and does not convey any license under the patent rights of ACCES nor the rights of others IBM PC PC XT and PC AT are registered trademarks of the International Business Machines Corporation Printed in USA Copyright 2000 2005 by ACCES I O Products Inc 10623 Roselle Street San Diego CA 92121 All rights reserved WARNING ALWAYS CONNECT AND DISCONNECT YOUR FIELD CABLING WITH THE COMPUTER POWER OFF ALWAYS TURN COMPUTER POWER OFF BEFORE INSTALLING A CARD CONNECTING AND DISCONNECTING CABLES OR INSTALLING CARDS INTO A SYSTEM WITH THE COMPUTER OR FIELD POWER ON MAY CAUSE DAMAGE TO THE I O CARD AND WILL VOID ALL WARRANTIES IMPLIED OR EXPRESSED Warranty Prior to shipment ACCES equipment is thoroughly inspected and tested to applicable specifications However should equipment failure occur ACCES assures its customers that prompt service and support will be available All equipment originally manufactured by ACCES which
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