NuDAQ PCI-7258 PhotoMos Relay Cards User's Guide
Contents
1. Q h Other categories not protected under our guarantees Customers are responsible for the fees regarding transportation of damaged products to our company or to the sales office Warranty Policy e 29 5 To ensure the speed and quality of product repair please download an RMA application form from our company website www adlinktech com Damaged products with RMA forms attached receive priority For further questions please contact our FAE staff ADLINK service adlinktech com Test amp Measurement Product Segment NuDAQ adlinktech com Automation Product Segment Automation adlinktech com Computer amp Communication Product Segment NuPRO adlinktech com NulPC adlinktech com 30 e Warranty Policy2. Syntax U16 7258 DO U16 boardlD U16 Group U16 doData Argument boardID Board ID for the specific board Group group 0 represents DO channel 1 16 group 1 represents DO channel 17 32 doData value which will be written to digital output port Return Code ERR_NoError ERR BoardNolnit ERR InvalidDOChannel 5 4 7258 DO Read Back Description This function is used to read data back from the digital output port controlled by the 7258 DO function You can read back all relay status close or open by using this function Syntax U16 7258 DO Read Back U16 boardID U16 Group U16 doReadBackData Argument boardID Board ID for the specific board Group group 0 represents DO channel 1 16 group 1 represents DO channel 17 32 diReadBackData Value read back from digital output port 0 represents the PhotoMos relay is under open condition and 1 represents the PhotoMos relay is under close condition Return Code ERR_NoError ERR_BoardNolnit ERR_InvalidDOChannel 26 e C C Libraries 5 5 7258 DI Description This function is used to read data from the digital input port There are 2 bits in the Isolated Digital Input Register for digital inputs purposes You can read the input data by using this function Syntax U16 7258 DI U16 boardID U16 diData Argument boardID Board ID for the specific board diData return 16 bit value from digital input port Only last 2 bit data a
3. programming some registers in the PCIl9030 should be noticed The interrupt control register INTCSR 0x4Ch of the PCI 9030 takes charge of all interrupt information from the local bus to PCI bus When users want to develop their own interrupt function driver both interrupt registers in the PCI 9030 and in PCI 7258 have to work together For more information about the interrupt control register in the PCI 9030 refer to the PCI 9030 data book With the PCL7258 software function library ADLINK has provided simple and easy to use functions to handle the procedures of interrupts Using these functions users are not required to know about the interrupt register in the PCI controller Hence we recommend users use these functions instead of developing your own interrupt functions For more information about the PCI 7258 function library refer to Chapter 5 Registers e 19 Operation Theory 41 PhotoMos Relay Output The PhotoMos relay has LED inputs and MOSFET outputs that provide input output isolation When a signal current flows into the LED input pin the emitted light from the LED is detected by the photoelectric element solar cell which is mounted opposite to the LED The photoelectric element then converts the received light to a voltage which charges the MOSFET gate on the output side When the voltage reaches a preset voltage value the MOSFET begins to conduct and turns on the load The simplified circuit of PhotoMos relay is sho
4. It is convenient for board identification when two or more PCI 7258 cards are in a system All I O signals are routed via a 68 pin SCSI connector Introduction e 1 1 1 Features The PCI 7258 PhotoMos relay actuator and D I Card provides the following advanced features e 32 bit PCl Bus Plug and Play e 32 PhotoMos relay actuator outputs e 2opto isolated digital inputs e On board relay driving circuits e Digital input channel 0 amp 1 interrupt e Board ID 1 2 Applications e Industrial ON OFF control e Energy management e Laboratory automation e Industrial automation e Switch contact status sensing limit switch monitoring e Integrate with A D and D A cards to implement a data acquisition amp control system 13 Specifications Digital input e Input channels 2 e Photo coupler PC 3H4 e Input current v 10 mA rated v 50 mA max for isolated input 2 e Introduction Input Voltage v Up to 24 Voc or 24V ac v Logic Low 0 2V v Logic High 5 24V Input impedance 2 4 KO 0 5W Isolated voltage 2 500 Vms channel to system Relay Output Output channels 32 Relay type 32 SPST Form A Load voltage peak AC 350V Continuous load current peak AC 0 12A Peak load current 0 3A VO isolation voltage 1 500 V AC Output turn on resistance typical 170 Output off state leakage current Maximum 11 A Turn on time typical 0 23 ms Turn off time typical 0 04 ms General Specifications Bu
5. can be VB VC Delphi BC5 or any Windows programming language that allows calls to a DLL The user s guide and function reference manual of PCIS DASK are in the CD Please refer the PDF manual files under Manual_PDF Software PCIS DASK The above software drivers are shipped with the board Please refer to the Software Installation Guide for installation procedures 1 4 2 PCIS LVIEW LabVIEW Driver PCIS LVIEW contains the VIs which is used to interface with NI s LabviEW software package The PCIS LVIEW supports Windows 95 98 NT 2000 The LabVIEW drivers is shipped free with the board You can install and use them without a license For more information about PCIS LVIEW please refer to the user s guide in the CD Manual_PDF Software PCIS LVIEW 4 e Introduction 1 4 3 PCIS VEE VEE Driver The PCIS VEE includes user objects which are used to interface with the VEE software package PCIS VEE supports Windows 95 98 NT The VEE drivers are shipped free with the board You can install and use them without a license For more information about PCIS VEE please refer to the user s guide in the CD Manual_PDF Software PCIS VEE 14 4 PCIS OCX ActiveX Controls We suggest users who are familiar with ActiveX controls and VB VC programming use the PCIS OCX ActiveX control components library to develop their applications PCIS OCX is designed for Windows 98 NT 2000 For more information about PCIS OCX please refer t
6. x 0 1 12 e Getting Started 27 Termination Board Connection The available termination board for the 68 pin SCSI connector is the DIN 68S 1S The DIN 68S 1S is a general purpose 68 pin screw terminal with a DIN socket It is also equipped with a 68 pin SCSI cable that allows for easy installation of the PCI 7258 Getting Started e 13 Registers Detailed descriptions of the registers are specified in this chapter This information is useful for programmers who wish to handle the card with low level programming However we suggest users to have an understanding of the PCI interface before starting any low level programming 31 VO Address Map The PCI 7258 registers are all 16 bits long Users can access these registers by 16 bit I O instructions only The controls for the relays and status of the isolated inputs are by means of accessing these registers The following table shows the registers mapping addresses the addresses are offset relative to the base address ox00h Relay Output CH 1 16 Relay SE SEN 0x04h Isolated Input CH 0 1 0x08h Clear IRQ Table 2 Registers Address Map Relay Output Read back 0x02h Relay Output CH 17 32 CH 17 32 Registers e 15 3 2 Relay Output Control Register There are 32 PhotoMos relays on the PCI 7258 each bit of the register corresponds to a relay channel Writing 1 to the register will cause the relay to close and 0 will cause it to open Address BASE 0
7. you for choosing ADLINK To understand your rights and enjoy all the after sales services we offer please read the following carefully 1 Before using ADLINK s products please read the user manual and follow the instructions carefully When sending in damaged products for repair please attach an RMA application form All ADLINK products come with a two year guarantee free of repair charge e The warranty period starts from the product s shipment date from ADLINK s factory Peripherals and third party products not manufactured by ADLINK will be covered by the original manufacturers warranty M End users reguiring maintenance services should contact their local dealers Local warranty conditions will depend on the local dealers Our repair service does not cover the two year guarantee while damages are caused by the following a Damage caused by not following instructions in the user menus b Damage caused by carelessness on the users part during product transportation c Damage caused by fire earthquakes floods lightening pollution and incorrect usage of voltage transformers d Damage caused by unsuitable storage environments with high temperatures high humidity or volatile chemicals e Damage caused by leakage of battery fluid when changing batteries f Damages from improper repair by unauthorized technicians Products with altered and damaged serial numbers are not entitled to our service
8. NuDAQ PCI 7258 PhotoMos Relay Cards User s Guide Recycled Paper Copyright 2002 ADLINK Technology Inc All Rights Reserved Manual Rev 1 04 October 18 2002 Part NO 50 11132 100 The information in this document is subject to change without prior notice in order to improve reliability design and function and does not represent a commitment on the part of the manufacturer In no event will the manufacturer be liable for direct indirect special incidental or consequential damages arising out of the use or inability to use the product or documentation even if advised of the possibility of such damages This document contains proprietary information protected by copyright All rights are reserved No part of this manual may be reproduced by any mechanical electronic or other means in any form without prior written permission of the manufacturer Trademarks NuDAQ is registered trademarks of ADLINK Technology Inc Other product names mentioned herein are used for identification purposes only and may be trademarks and or registered trademarks of their respective companies Getting service from ADLINK e Customer Satisfaction is the most important priority for ADLINK Tech Inc If you need any help or service please contact us Suppor m 9F No 166 Jian Yi Road Chungho City Taipei 235 Taiwan e Please email or FAX us of your detailed information for a prompt satisfactory and constant service Detail
9. d at the same point as the anti static mat Inspect the card module carton for obvious damages Shipping and handling may cause damage to your module Be sure there are no shipping and handling damages on the modules carton before continuing After opening the card module carton extract the system module and place it only on a grounded anti static surface with component side up Again inspect the module for damages Press down on all the socketed IC s to make sure that they are properly seated Do this only with the module place on a firm flat surface Note DO NOT ATTEMPT TO INSTALL A DAMAGED BOARD IN THE COMPUTER You are now ready to install your card 8 e Getting Started 2 3 PCB Layout The location of the connectors and switches on the PCI 7258 are shown in figure 1 below Descriptions are outline in the proceeding sections oggpgcoocyggggro RIIT TED Sr ma a a a Ka D KI KR S LERI ZER a E T RAJ ZER SH Ee T Figure 1 PCI 7258 PCB Layout Getting Started e 9 2 4 External LED Figure 2 PCI 7258 External LED connector The PCI 7258 card is designed with 32 LEDs each indicating the operation status of the 32 relays In addition there are also 32 external LED connectors available for users to use as so pleases Utilizing the external LEDs connecting to JP1 or JP2 users can have a visual status of each relay displayed on a chassis panel or on any appa
10. dual interrupt routing scheme and he interrupt sources are on the digital input channels 0 and 1 Using these interrupts will make handling complicated digital information much easier and relief your computer from the heavy burden of dealing with digital input data Note that dual interrupts does not mean the card occupies two IRQ levels The interrupt will occur only when digital input level changes from 0 to 1 In other words the interrupt condition occurs on the rising edge triggered on the DI channel Be sure to clear the interrupt request after handling the ISR or the next interrupt request will not be received normally For more information about the interrupt operation refer to section 5 6 22 e Operation Theory C C DOS Libraries This chapter describes the software libraries for operating this card The function prototypes and useful constants are defined in the header files located in the LIB and INCLUDE directory 5 1 Programming Guide 5 1 1 Naming Convention The functions of the NuDAQ PCI or NuIPC CompactPCI card software drivers uses full names to represent the functions real meaning The naming convention rules are _ hardware_model _ action_name e g 7258 Initial All functions in the PCI 7258 drivers are with 7258 as hardware_model C C Libraries e 23 5 1 2 Data Types We have defined some data types in the ACL_PCI h header file These data types are used by the NuDAQ Cards library We suggest you us
11. e ee ee 18 3 5 Clear IRQ register ese ee ee ee ER ed ee be ee ee 18 3 6 Handling PCI Controller Registers esse ees see ee ke 19 Table of Contents e i Operation THEOPY sisie sesse ee De eege 20 4 1 PhotoMos Relay Output eeeeeeeeeeeeeeeeeeeeeeaaeeeeeeea 20 4 2 Isolated Digital Input 22 4 3 Interrupt Architecture 22 C C DOS Libraries eene eene Re Ee RE RE EER RE KEER GE RE KEER GE Re EE 23 5 1 Programming Guide 23 5 1 1 Naming Convention 23 6 1 2 Data LY POS EER ave RE EE EDE BERGE Ee PER De ee ee gee 24 5 2 Me ER EE EE OE EE N 25 5 3 Mr drie OE EE ED 26 5 4 7258 DO Read Back 26 5 5 ri ID RE N EE OE RE ON 27 5 6 7258 INT Control S Ee tthe edad EER BEE ERGE SEE ER EED ER EE EE 27 5 9 27258 EL do EE Sek beer 28 5 10 7258 GET IRO Status etse se ei EKKE AE EE SUE EE 28 W rranty PONCY es ees Ee ee ee DI DEER N so ee 29 ii e Table of Contents Tables and Figures Tables Table 1 Table 2 Table 3 Figures Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Board ID Setting Conditions ese see se se se ee ee ee Ge Ge ee Ge ee ee 11 Registers Address Map 15 Data Types and Range PG 1258 PCB Lay oUt EE Ese RR EE ese reses ES EE GER EE 9 Board ID Dipswitch EE use EE RE Ee ge ee ER seg Kees eens 11 Pin Assignment of PCI 7258 CN 12 PhotoMos relay schematic ENNEN 20 PhotoMos relay Wiring diagram ENEE 21 Protection circuit for an Ind
12. e these data types in your application programs The following table shows the data type names and their range 2147483648 to 2147483647 32 bit single precision 0 to 4294967295 floating point 32 bit single precision floating point F64 64 bit double precision 1 797683134862315E308 to floating point 1 797683134862315E309 Boolean logic value TRUE FALSE Table 3 Data Types and Range 24 e C C Libraries 5 2 7258 Initial Description The PCI 7258 cards are initialized according to the card number Because the PCI 7258 is designed with the PCI bus architecture and meets the plug and play specifications the RQ and base address pass through address are assigned by system BIOS directly Every PCI 7258 card has to be initialized by this function before using any other functions Syntax U16 _7258_Initial U16 existCards PCI INFO pcilnfo Argument existCards The number of installed PCI 7258 cards The returned value shows how many PCI 7258 cards are installed in the system pcilnfo This structure stores the PCI bus plug and play initialization information which is determined by PnP BIOS The PCI_INFO structure is defined in the ACL_PCI H header file The base I O addresses and the interrupt channel number are stored in the pciinfo which is used for reference Return Code ERR_NoError ERR_PCIBiosNotExist ERR_BoardNolnit ERR_InvalidBoardNumber C C Libraries 25 5 3 7258 DO Description
13. ed Company Information Company Organization E mail Address Computer Brand M B CPU Environment to Use Chipset BIOS Video Card Network Interface Card Other Table of Contents Tables and Ne UI iii How to Use This Guide essens se eene Re EER RE KEER Re KEER Ge Ke ea iv Intro dueOR siese E Se ee ee ak Ge 1 1 1 Feature is IESER Ee a VR Ee nee eter 2 1 2 Applications AE EE EE NE EE N 2 1 3 Specifications EE EE EE EE EG i NEEN 2 1 4 Sowara SUDPO AE ESE SR Ee DE EE Bee ee eg de 4 1 4 1 Programming LibraFY e sees ese se ee se Re Ge RR ee Ge Re Ge Ge Re ee ee 4 142 PCIS LVIEW LaDVIEW Driver 4 143 PCIS VEE VEE Driver 5 144 PCIS OCX ActiveX Controls ee ek ee RR Ge GR RR ee 5 14 8 PCIS DDE DDE Server and Jofouch N 5 14 6 PCISISG ISAGRAET Ve 5 deg Tee Ee sms ke RS EE 6 148 PCIS OPC OPC Gerver iese see ee ee se RR ee GR GR Re Ge GR GR ee ee 6 Getting Started ei RE ide oni es kid EO be be od 7 2 1 What you have AE N EE 7 2 2 We te ale RE EE EE OE ieee ee es 8 2 3 POB Lay Ut sis SEE ES EE fois ED EE eee 9 2 4 Board Dis ME DE EE ee OV EE ORE ee 11 2 6 Connector Pin Assignments ee de ee ee ee ee ee 12 2 7 Termination Board ConnectiON ie sees eek see Ee ee 13 E UE 15 3 1 VO Address Map 15 3 2 Relay Output Control Register iese ee see RR ee ee ee 16 3 3 Relay Output Read Back Register ee see ee ee ee 17 3 4 Isolated Digital Input Register esse es ee ee e
14. ntroduction e 5 1 4 7 PCIS ICL InContro Driver PCIS ICL is the InControl driver which supports Windows NT The PCIS ICL is included in the ADLINK CD It is not free and requires a license Please contact ADLINK dealers or ADLINK to purchase the license 1 4 8 PCIS OPC OPC Server PCIS OPC is an OPC server which can be used to link with other OPC clients There are many software packages on the market that can provide the OPC clients The PCIS OPC supports Windows 98 NT and 2000 Itis not free Please contact ADLINK dealers or ADLINK to purchase the license 6 e Introduction Getting Started This chapter describes how to install and setup the PCI 7258 The contents in the package and unpacking information that you should be aware of are outlined first 2 1 What you have In addition to the User s Manual the package should include the following items e PCI 7258 PhotoMos relay cards e ADLINK Software CD e Software Installation Guide If any of these items are missing or damaged contact ADLINK or the dealer from whom you purchased the product Save the shipping materials and carton in case you want to ship or store the product in the future Getting Started e 7 2 2 Unpacking The card contains electro static sensitive components that can be easily be damaged by static electricity Therefore the card should be handled on a grounded anti static mat The operator should be wearing an anti static wristband grounde
15. o the user s guide in the CD Manual_PDF Software PCIS OCX PCIS OCX PDF The above software drivers are shipped with the board Please refer to the Software Installation Guide for installation procedures ADLINK also supply an ActiveX control software called DAQBench DAOBench is a collection of ActiveX controls for measurement and automation applications With DAQBench you can develop custom user interfaces to display and analyze data you acquired or received from other sources or integrate with popular applications or data sources For more information about DAQBench please refer to the user s guide in the CD Manual_PDF Software DAQBench DA BenchManual PDF There is a free 4 hour evaluation version of DAQBench available in the CD DAQBench is not free Please contact ADLINK dealers or ADLINK to purchase the software license 1 4 5 PCIS DDE DDE Server and InTouch DDE stands for Dynamic Data Exchange The PCIS DDE includes the PCI cards DDE server The PCIS DDE server is free and is included in the ADLINK CD The DDE server can be used in conjunction with any DDE client under Windows 98 NT 2000 1 4 6 PCIS ISG ISaGRAF driver The ISaGRAF Workbench is an IEC1131 3 SoftPLC control development environment The PCIS ISG includes ADLINK product drivers for ISaGRAF under Windows NT environment The PCIS ISG is included in the ADLINK CD It is not free Please contact ADLINK dealers or ADLINK to purchase the license I
16. ratus Only LED s with a forward voltage V lower than 2V will operate Each external LED connector has a current limiting resistor 3300 connected to the 5V supply therefore external current limiting circuitry for external LED s are not necessary The direction of the external LED s connection is shown in Figure 2 Before connecting a LED to a connector make sure the LED s orientation is correct 10 e Getting Started 2 5 Board ID When two or more data acquisition cards are installed in a system it can be tedious trying to identify a specific card For easier identification the PCI 7258 implemented a Board ID function By setting the Dipswitch located at S1 users can assign an ID address to a specific card and access the card through software programming For more details about the Board ID in programming please refer to chapter 5 Table 1 below shows all dipswitch setting conditions 2 3 Figure 3 Board ID Dipswitch Board ID Switch No Ge re E E i Table 1 Board ID Setting Conditions Note 1 0n O off Getting Started e 11 2 6 Connector Pin Assignments The PCI 7258 card is equipped with a 68 pin SCSI connector CN1 Figure 3 defines the pin assignment for the connector 34 68 Figure 4 Pin Assignment of PCI 7258 CN1 Legend NO x Relay normal open pin x x 1 32 COM x Relay common pin x x 1 32 DI x Digital input pin x x 0 1 DIGND x Digital input ground pin x
17. re valid Return Code ERR_NoError ERR_BoardNolnit 5 6 7258 INT Control Description This function is used to control the interrupt source of the PCL7258 The interrupt source can be the digital input of channel 0 1 or both Syntax U16 7258 INT Control U16 boardID U16 intiFlag U16 int2Flag Argument boardID Board ID for the specific board IntiFlag Digital input channel 0 interrupt control 1 enable and 0 disable Int2Flag Digital input channel 1 interrupt control 1 enable and 0 disable Return Code ERR_NoError ERR_BoardNolnit C C Libraries e 27 5 9 7258 CLR_IRQ Description This function is used to clear the interrupt reguest Syntax U16 7258 CLR IRO U16 boardID Argument boardID Board ID for the specific board Return Code ERR_NoError ERR_BoardNolnit 5 10 7258 GET IRO Status Description This function is used to obtain the interrupt status Syntax U16 7258 GET IRO Status U16 boardID U16 intiStatus U16 int2Status Argument boardID Board ID for the specific board Inti Status interrupt source 0 status 1 represents interrupt request assert and 0 represents interrupt request de assert Int2Status interrupt source 1 status 1 represents interrupt request assert and 0 represents interrupt request de assert Return Code ERR_NoError ERR_BoardNolnit 28 e C C Libraries Warranty Policy Thank
18. s 32 bit PCI bus Dimension 174 mm x 106 mm standard PCI half size Operating temperature 0 60 C Storage temperature 20 C 80 C Humidity 5 to 95 non condensing Power Consumption 5V 380 mA All relays energized Introduction e3 14 Software Support ADLINK provides versatile software drivers and packages for users different approach to building a system ADLINK not only provides programming libraries such as DLL for most Windows based systems but also provide drivers for other software packages such as LabVIEW VEE InTouch InControl ISaGRAF and so on All software options are included in the ADLINK CD Non free software drivers are protected with licensing codes Without the software code you can install and run the demo version for two hours for trial demonstration purposes Please contact ADLINK dealers to purchase the formal license 1 4 1 Programming Library For customers who are writing their own programs we provide function libraries for many different operating systems including e DOS Library Borland C C and Microsoft C Functional descriptions are included in this user s guide e PCIS DASK Include device drivers and DLL for Windows 98 Windows NT and Windows 2000 DLL is binary compatible across Windows 98 Windows NT and Windows 2000 That means all applications developed with PCIS DASK are compatible across Windows 98 Windows NT and Windows 2000 The developing environment
19. uctive oad sees ee se Ge ee ee 21 Photo Coupler Tables and Figures e iii How to Use This Guide This manual is intended to assist users to configure the PCL7258 PhotoMos Relay Card It is divided into 5 chapters Chapter 1 Chapter 2 Chapier3 Chapter 4 Chapter 5 Introduction gives an overview of the product features applications and specifications Getting Started describes how to install the PCI 7258 The Board ID switch and connectors pin assignments are also described Registers describes the registers that are available to the PCI 7258 The information is important for programmers who want to control the hardware with low level programming languages Operation Theory describes how to operate the PCI 7258 The PhotoMos relay and isolated digital input are introduced Some programming concepts are also described C C libraries describes the software utility and the software libraries of the PCI 7258 This chapter also outlines basic requirements for programming your own software application iv e How to Use This Guide Introduction The PCL7258 PhotoMos relay card is a basic Digital VO card for PCI bus computers used in industrial applications This PCI 7258 provides 32 PhotoMos relay actuators and 2 opto isolated digital inputs All relays are of Form A type and is very suited for constant ON OFF control devices Other useful feature includes the Board ID
20. wn in figure 4 below Figure 5 PhotoMos relay schematic 20 e Operation Theory The PhotoMos relay incorporates the advantages of both a semiconductor and an electro mechanical relay The PhotoMos relay utilizes the MOSFET as a switch instead of the mechanical contact Thus the contact resistance remains stable through the life of the relay Furthermore dithering problems is eliminated The PCL7258 is equipped with 32 PhotoMos relays which are all form A type The load voltage can either be AC or DC The basic wiring diagram is shown in figure 5 below VLYAC DO Figure 6 PhotoMos relay wiring diagram If an inductive load is connected the spike voltage may exceed the relay s maximum rating To protect the components user should add a diode in the circuit A typical protection circuit is shown below INDUCTIVE LOAD Figure 7 Protection circuit for an Inductive load Operation Theory e 21 4 2 Isolated Digital Input The PCI 7258 contains 2 opto solated digital input channels The circuit diagram of the isolated input channel is shown below 2 4 K0 DI A d N aa DIGND Figure 8 Photo Coupler The digital input is routed through a photo coupler PC3H4 so that the connections are not polarity sensitive whether using positive or negative voltages The PCI 7258 digital input has an inline 2 4kO resistor and the input voltage can ranges from 0 to 24V 4 3 Interrupt Architecture PCI 7258 has a powerful
21. x00 Attribute Write EE EIE EE EE ee Me se bo ie Address BASE 0x02 Attribute Write Mh EE EE Ee Ed WINS IN DN RLYx relay output channel x x 1 32 16 e Registers 3 3 Relay Output Read Back Register The status of the PhotoMos relay can be read back from the readback register If the relay is in the close position the corresponding bit value is 1 If the relay is open then the bit value is 0 Address BASE 0x00 Attribute Read e ER a EE EO EER ER EER EN EEN od Eed EE Address BASE 0x02 Attribute Read EE EA Ed EER EN EE Ee EE Er Ee Lo EE RBKx Read back data of relay x x 1 32 Registers e 17 34 Isolated Digital Input Register There are 2 isolated input channels on PCI 7258 card The status of the 2 channels can be read from the isolated input register Each bit corresponds to each channel A 1 means the input logic is high and 0 means the input logic is low Address BASE 0x04 Attribute Read DIx isolated digital input channel x x 0 1 3 5 Clear IRQ register The PCI 7258 has two interrupt sources for the digital input channels 0 and 1 Writing anything to this register will clear the interrupt request Address BASE 0x08 Attribute Write 18 e Registers 3 6 Handling PCI Controller Registers The PCI bus controller adopted in PCI 7258 is the PCI 9030 which is provided by PLX technology Inc When users attempt to handle low level
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