DM5856HR/DM6856HR Isolated digital I/O
Contents
1. ee ee cece cece eee eeecaaee tees ee eeeeaaeaaaaaeeeeeeeeseeegaaeeeeeees 20 Isolated output programming eccceeeeee cece ee eeeeeeaaaaeee este eeeeeaaaeeeeeeeeeeeecaaeeeeeeeeeeeeeaaaes 21 Isolated input programming cc cee eeeeeeee cette eeeeeeaaee teste eeteeaaaaeeaaeeeeeeeeeeeecaaaaeeeeeeeeeeenaaaes 21 CHAPTER 6 DM5856 DM6856 SPECIFICATIONS 0 0 22 CHAPTER 7 RETURN POLICY amp WARRANTY n 23 DM5856HR DM6856HR 4 RTD Finland Oy User s Manual List of Illustrations amp Tables Illustrations Fig 2 1 Board layout showing jumper locations Fig 3 1 DM5856HR DM6856HR integrated in a PC 104 dataModule stack Fig 3 2 19 Eurocard rack installation with an integrated PC 104 data Module and EUROCARD cpuModule computer system Fig 3 3 Input connection for Channel number 1 Fig 3 4 Output connection for Channel number 1 Fig 4 1 DM5856HR DM6856HR Block Diagram Tables Table 2 1 Factory Jumper settings Table 2 2 Base Address jumper settings Table 3 1 Input connection pinouts Table 5 1 DM5856HR DM6856HR I O Map DM5856HR DM6856HR 5 RTD Finland Oy User s Manual Chapter 1 INTRODUCTION This user s manual describes the operation of the DM5856HR DM6856HR Isolated Digital Interface boards Features Some of the key features of the DM5856HR DM6856HR include 16 channel by channel isolated open collector digital outputs 8mA 30V 16 optocoupler inputs with reverse voltage pr2. BA can be set using the jumpers as described in Chapter 2 Board settings The following sections describe the register contents of each address used in the I O map Table 5 1 DM5856HR DM6856HR I O Map Register Description Read Function Write Function Address in HEX Low Byte ch 1 8 Digital Inputs 1 8 Digital outputs 1 8 High Byte ch 9 16 Digital Inputs 9 16 Digital outputs 9 16 BA Base Address BA 0 Digital Inputs 1 8 Read The optoisolated digital input channels 1 8 can be read from address BA 0 BA 1 Digital Inputs 9 16 Read The optoisolated digital input channels 9 16 can be read from address BA 1 BA 0 Digital Outputs Write The Data Output register controls the output optocouplers 1 8 Data is transferred from the Data register to the outputs by performing an 8 bit write to BA 0 Direct transfer of data to the output latch for all the 16 bits can be performed by executing a 16 bit write to BA 0 The address decoder of the DM5856HR will automatically write consecutive addresses BA 0 and BA 1with the correct output data bytes BA 1 Digital Outputs Write The Data Output register controls the output optocouplers 9 16 Data is transferred from the Data register to the outputs by performing an 8 bit write to BA 1 DM5856HR DM6856HR 19 RTD Finland Oy User s Manual Programming the DM5856HR This section gives you some general information about programming the DM5856HR board It then walks you through
3. LONG AN IMPLIED WARRANTY LASTS SO THE ABOVE LIMITATIONS OR EXCLUSIONS MAY NOT APPLY TO YOU THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS AND YOU MAY ALSO HAVE OTHER RIGHTS WHICH VARY FROM STATE TO STATE DM5856HR DM6856HR 24 RTD Finland Oy
4. setting of 300h be unusable for your system configuration you may change this setting to another using the options illustrated in Table 2 2 overleaf The table shows the switch settings and their corresponding values in hexadecimal values Ensure that you verify the correct location of the base address jumpers When the jumper is removed it corresponds to a logical 0 connecting the jumper to a 1 When you set the base address of the module record the setting inside the back cover of this manual directly after the Appendices DM5856HR DM6856HR 10 RTD Finland Oy dU e s Manual _ BASE ADDRESS JUMPER SETTINGS FOR DM5856HR DM6858 BOARDS Base address Jumper Settings Base Address Jumper settings Hex Decimal 87654321 Hex Decimal 87654321 200 512 300 768 10000 210 528 10001 220 544 10010 230 560 10011 240 576 10100 250 592 10101 260 608 360 864 10110 270 624 10141 280 640 11000 290 656 11001 2A0 672 11010 2B0 688 11041 2C0 704 11100 2D0 720 11101 2E0 736 o1110 CS EO 22 10 2F0 752 01111 3F0 1008 11111 0 NOT JUMPERED 1 JUMPER INSTALLED Table 2 2 Base Address Jumper settings factory default Base Address shaded Note In the table above only the MSB address decoder jumper settings are illustrated You may also connect jumpers 1 3 to decode address lines A1 A3 DM5856HR DM6856HR 11 RTD Finland Oy User s Manu
5. the factory for an RMA number THIS LIMITED WARRANTY DOES NOT EXTEND TO ANY PRODUCTS WHICH HAVE BEEN DAMAGED AS A RESULT OF ACCIDENT MISUSE ABUSE such as use of incorrect input voltages improper or insufficient ventilation failure to follow the operating instructions that are provided by REAL TIME DEVICES acts of God or other contingencies beyond the control of REAL TIME DEVICES OR AS A RESULT OF SERVICE OR MODIFICATION BY ANYONE OTHER THAN REAL TIME DEVICES EXCEPT AS EXPRESSLY SET FORTH ABOVE NO OTHER WARRANTIES ARE EXPRESSED OR IMPLIED INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE AND REAL TIME DEVICES EXPRESSLY DISCLAIMS ALL WARRANTIES NOT STATED HEREIN ALL IMPLIED WARRANTIES INCLUDING IMPLIED WARRANTIES FOR MECHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE LIMITED TO THE DURATION OF THIS WARRANTY IN THE EVENT THE PRODUCT IS NOT FREE FROM DEFECTS AS WARRANTED ABOVE THE PURCHASER S SOLE REMEDY SHALL BE REPAIR OR REPLACEMENT AS PROVIDED ABOVE UNDER NO CIRCUMSTANCES WILL REAL TIME DEVICES BE LIABLE TO THE PURCHASER OR ANY USER FOR ANY DAMAGES INCLUDING ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES EXPENSES LOST PROFITS LOST SAVINGS OR OTHER DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PRODUCT SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES FOR CONSUMER PRODUCTS AND SOME STATES DO NOT ALLOW LIMITATIONS ON HOW
6. the major programming functions of the DM5856HR This will help you use the example program that is included with the board All of the program descriptions use decimal values unless otherwise specified The DM5856HR board is programmed by writing or reading the correct I O port address These I O ports were described in the previous section of this chapter The following example shows how to perform an 8 bit read and write I O port addresses using C syntax and assembly code Read Write C syntax var inp address outp address data Assembly mov dx address mov dx address in ax dx mov ax data out dx ax 8 bit operations must be performed to the DM5856HR DM6856HR board for correct operation Clearing and setting bits in an I O port When you clear or set bits in an I O port you must be careful not to alter the status of other bits You can preserve the status of all the bits you do not wish to change by proper use of the bit wise AND and OR operators Using and or operators single or multiple bits can easily be set or cleared in one line operations 1 To clear a single bit in a port AND the current value of the port with the value B where B 255 2 exp bit 2 To set a single bit in a port OR the current value of the port with the value B where B 2 exp bit Bits are numbered from 0 7 for the low byte of a word and from 8 15 for the high byte of a word Setting and clearing of multiple bits in a bye or word i
7. the rugged IDAN enclosure system Please consult the factory for more details or visit our websites at www rtdfinland fi or www rtdusa com Using this manual This manual is intended to help you install your new board and get it working quickly while also providing enough detail about the board and it s functions so that you can enjoy maximum use of it s features even in the most demanding applications When you need help This manual and all the example programs will provide you with enough information to fully utilize all the features on this board If you have any problems with installation or use of the board contact our Technical Support Department 358 9 346 4538 during European business hours Alternatively send a FAX to 358 9 346 4539 or Email to sales rtdfinland fi When sending a FAX or Email request please include the following information Your company s name and address your name your telephone number and a brief description of the problem DM5856HR DM6856HR 7 RTD Finland Oy User s Manual Chapter 2 BOARD SETTINGS The DM5856HR DM6856HR Isolated digital I O board has jumper settings which can be changed to suit your application It is factory configured with a 5V input range configuration The factory settings are listed and shown in the diagram in the beginning of this chapter DM5856HR DM6856HR 8 RTD Finland Oy User s Manual Factory Configured Jumper Settings Table 2 1 below illustrates the factory j
8. trademarks of IBM Corporation PC 104 is a registered trademark of PC 104 Consortium The Real Time Devices Logo is a registered trademark of Real Time Devices utilityModule is a trademark of Real Time Devices All other trademarks appearing in this document are the property of their respective owners DM5856HR DM6856HR 3 RTD Finland Oy User s Manual TABLE OF CONTENTS LIST OF ILLUSTRATIONS amp TABLES 00 0 cocccccccccccscecstesstessteesteeneen 5 CHAPTER 1 INTRODUCTION o oo ccccccsssssseesseceseesseeseeeseeesees 6 TENSE TIE E E E RNA a Ses epspaneusneretespeei O A OEE AA 6 Isolated digital iutputs cc ceeceecee eee ceceeeee eee teeter teeeeaaaee tees ee eteeaaaaeeeeeeeeegeccaaeeeeeeeeeteeeaaaes 6 Isolated digital inputs ccccceeee eee cecceeee eee eee e eee aaee eee ee eters ettceaaaaeeeeeeeeegeecaaeeeeeeeeeeeeeaaaes 6 Mechanical description c ccccceeeeeeeeeeeeneee eee eee e eee ccee teeter eee eee tecaaaeeeeeeeeedeeniaaeeeeeeeennee 6 Connector description cece cece eee cece eect tee cce eter ee eee a a aed anes ee eet aaaeeeee ee teeeeaaeeeeeeeeeneee 6 What comes with your board ccecceeeeeeeeeceeneee eee eeeeeeccaaeeeeeeeeeeeeeeeecaaaeeeeeeeeesecscaaeeeeeees 7 Board ACCESSOMES custo cea eaa aaa aaa A h aa aE AOAO Aae AORE ancien etesenesuseases EATA ENAR ENEAS 7 Application software and drivers Hardware accessories Using this mi antiali ces ss 3 Ait Se As wtee tna ctatetaa
9. 56HR 14 RTD Finland Oy User s Manual Table 3 2 below shows the output connection pin outs Pin number Signal description Pin number Signal Description 1 Vsupply 1 20 Outs 3 TGNDAT 4 Vsupply 2 5 GND 200 _ 5 Omz ____ Je 7 Vsupply 3 8 ut 9 CT GND S 10S Vsupply 4 aoo pow o fpe foma _ 13_ sVsupplys_ i4_ outs__ e Jas joe a aooo tows pe tone 21 GND 7 22 Vsupply 8 a fowm a tome 25 Vsupply 9 26 Ow9 27 GND 9 28 Vsupply 10 29 Ouwo so GND 1O 31 Vsupply 11 132 fut 33 GND 11 34 Vsupply 12 35 fut2 ss GND12 37 Vsupply 13 38 utts 39 GND 13 40 Vsupply 14 a owa eG 43 Vsupply 15 44 utts a5 GND 15 46 Vsupply 16 a7 Owe tN J4 1 2 J4 2 3 J4 3 HCPL466 3 4 This diagram illustrates the output connection for channel 1 DM5856HR DM6856HR 15 RTD Finland Oy User s Manual Chapter 4 HARDWARE DESCRIPTION This chapter describes in detail the two major features of the DM5856HR DM6856HR The isolated optocoupler inputs and the isolated optocoupler outputs REGISTER ISOLATORS OUTPUT gt E Q z lt O IGOLATORS 16 ISOLATED INPUTS PC 104 BUS ADDRESS DECODER Fig 4 1 DM5856HR DM6856HR Block diagram DM5856HR DM6856HR 16 RTD Finland Oy Ur Manual _ Isolated digital inputs The Isolated output stage of the DM5856HR consists of
10. DM5856HR DM6856HR Isolated digital I O module User s Manual Hardware Revision 1 0 B User s Manual DM5856HR DM6856HR DM5856HR DM6856HR ISOLATED DIGITAL I O MODULE User s Manual REAL TIME DEVICES FINLAND OY LEPOLANTIE 14 FIN 00660 HELSINKI FINLAND Phone 358 9 346 4538 FAX 358 9 346 4539 E Mail sales rtdfinland fi Website www rtdfinland fi 2 RTD Finland Oy User s Manual Revision History 20 05 1998 Release 2 0 22 03 1999 Updated and corrected 01 08 1999 Input optocoupler resistor formula changed 18 02 2000 Figures on pages 14 and 15 updated 14 07 2001 Name of company changed reformatted IMPORTANT Although the information contained herein has been carefully verified RTD Finland Oy assumes no responsibility for any errors that may occur for any damage to property or persons resulting from improper use of this manual or from the related software RTD Finland Oy also reserves the right to alter the contents of this manual as well as features and specifications of this product at any time without prior notice Notice We have attempted to verify all information in this manual as of the publication date Information in this manual may change without prior notice from RTD Finland Oy Published by Real Time Devices Finland Oy Lepolantie 14 FIN 00660 Helsinki Finland Copyright 1997 2001 Real Time Devices Finland Oy All rights reserved Printed in Finland PC XT PC AT are registered
11. DM6856HR 17 RTD Finland Oy User s Manual Isolated digital outputs The Isolated input stage of the DM5856HR DM6856HR consists of two major parts 1 Optocouplers 2 Output registers 1 Optocouplers Small SMD optocouplers are used to isolate each channel of the isolated outputs Individual optocouplers are used for each channel The optocouplers are directly connected to the Output latch The output optocoupler transistor is in the open collector configuration with a pull up resistor which is connected to the collector A 4 7 KOhm resistor is used as a pull up to the supply The output 4 7 Kohm pull up resistor has been installed for a 5 30V isolated output range 2 Output registers The optocouplers are connected to two 8 bit data registers which are directly addressable with a write operation at address BASE 0 and BASE 1 The state of the outputs does not change even though a system reset may occur A write to the output latch will update the state of the outputs DM5856HR DM6856HR 18 RTD Finland Oy User s Manual Chapter 5 BOARD OPERATION AND PROGRAMMING This chapter shows you how to program and use your DM5856HR DM6856HR It provides a complete description of the I O map plus a detailed discussion of programming operations to aid you in programming Defining the I O Map The I O map of the DM5856HR DM6856HR is shown in Table 5 1 below As shown the module occupies two addresses The Base Address designated as
12. al Chapter 3 BOARD INSTALLATION The DM5856HR DM6856HR Isolated Digital Interface board is very easy to connect to your industrial or automotive control system Direct interface to PC 104 systems as well as EUROCARD boards is possible This chapter gives step by step instructions on how to install the board into your system After completing the installation it is recommended that you use the diagnostic software to fully verify that your board is working Board Installation Keep your board in the antistatic bag until you are ready to install it to your system When removing it from the bag hold the board at the edges and do not touch the components or connectors Please handle the board in an antistatic environment and use a grounded workbench for testing and handling of your hardware Before installing the board in your computer check the jumper settings Chapter 1 reviews the factory settings and how to alter them If any alterations are needed please refer to the appropriate instructions in this chapter Do however note that incompatible settings can result in unpredictable board operation and erratic response General installation guidelines e Turn OFF the power to your computer e Touch the grounded metal housing of your computer to discharge any antistatic build up and then remove the board from its antistatic bag e Hold the board by the edges and install it in an enclosure or place it on the able on an antistatic surface e Con
13. ectors Isolated Outputs Isolated Inputs Bus connector Power requirements Supply voltage Operating temperature range Standard DM5856HR DM6856HR 22 16 1 500V Rms Open collector with a 4 8K pull up 8 mA sink current 30V 5 to 30V 16 3 3V Approx 18V 1 500V Rms 50 pin header 50 pin header connector XT or AT connector 5V 8 Supply current 125 mA 40 to 85 C RTD Finland Oy User s Manual Chapter 7 RETURN POLICY AND WARRANTY Return Policy If the module requires repair you may return it to us by following the procedure listed below Caution Failure to follow this return procedure will almost always delay repair Please help us expedite your repair by following this procedure 1 Read the limited warranty which follows 2 Contact the factory and request a Returned Merchandise Authorization RMA number 3 On a sheet of paper write the name phone number and fax number of a technically competent person who can answer questions about the problem 4 On the paper write a detailed description of the problem with the product Answer the following questions Did the product ever work in your application What other devices were connected to the product How was power supplied to the product What features did and did not work What was being done when the product failed What were environmental conditions when the product failed 5 Indicate the method we should use to ship t
14. ed Stack your PC 104 compatible computer directly on the DM5856HR using the onboard mounting holes Connector description There are two 50 pin digital interface connectors on the DM5856HR DM6856HR to directly interface isolated digital I O signals Isolated inputs and outputs are connected to the board by 50 pin flat ribbon cable connectors Use this type of interface connector with a TB50 screw terminal block DM5856HR DM6856HR 6 RTD Finland Oy User s Manual What comes with your board Your DM5856HR DM6856HR package contains the following items DM5856HR DM6856HR Isolated Digital Interface module User s manual Note Software and diagnostics programs and WIN95 98 2000 NT 4 0 are available free of charge on our website www rtdfinland fi If any item is missing or damaged please call Real Time Devices Finland customer service department at the following number 358 9 346 4538 Board accessories In addition to the items included in your DM5856HR delivery several software and hardware accessories are available Contact your distributor for more information and for advice on selecting the most appropriate accessories to support your instrumentation system e Application software and drivers e Hardware accessories Real Time Devices can supply a complete set of accessories for your DM5856HR DM6856HR card These include power supplies terminal boards TB50 and other connection systems The board is also available in
15. etatenenchatiepeapevensuenseeapaeg evens uatenegssapenegssetiyees 7 When you need hel p cccccccccecceecccnceeeeeeeeeeeecaaaeeeeeeeeteaaaaaaaaaaeeeeeeesseeaaaaeeeeeeeeseeseaaaeeeeees 7 CHAPTER 2 BOARD SETTINGS tcc weet 8 Factory Configured Jumper SettinQS cccccccccceeeeeeeeeeeeeecneeeeeeeeeeeeeecaaaaaaeeeeeeeeeeeeeeaaaes 9 Base Address JUMPENS ccceeeee eee eeeeccneee eee eee e teeta aaee esse ee eeecaaaeeeeeeeeeeeeeaaaeeeeeeeennee 10 CHAPTER 3 BOARD INSTALLATION ossen 12 Board installation t 2 2205 cit ts cepan ana anana OA EEOAE EAE OO AE Aa nOn seater etepereesevas 12 External I O CONNECTIONS ccccecceecceeee teeter eee eecaeee eee e ee eteeetecaaaeeeeeeeeeeeecaaaeeeeeeeeteeeaaaes 14 Isolated digital input Isolated digital outputs CHAPTER 4 HARDWARE DESCRIPTION osn 16 Isolated digital inputs ccccceeeeeeeeeeeeeeee eee e ee eeeecaaee eset reeset eeeeaaaeeeeeeeesedeccaaaeeeeeeeeeeeesaaaes 17 Isolated digital outputs ccccceeeeecceneee eee e etter eee eeaaaee sees ee etecaaaeeeeeeeeeeeeccaaeeeeeeeeeeneniaaaes 18 CHAPTER 5 BOARD OPERATION AND PROGRAMMING 19 Defining the VO maps ssf ct heck ede aaa vavedias EIEN EROREE DOEDE DRAR ONONE ROEA nee 19 Base 0 I O register 1 Read Write Base 1 I O register 2 Read Write Programming the DM5856 DM6856 0 0 ceeecceeeee cette eee eeeaeee eee eee teeeeeeaaaaeeeeeeeeeeeeaaaaes 20 Clearing and setting bits in a POFt
16. he product back to you e We will return warranty repairs by UPS Ground at our expense e Warranty repairs may be returned by a faster service at your expense e Non warranty repairs will be returned by UPS Ground or the method you select and will be billed to you 6 Clearly specify the address to which we should return the product when repaired 7 Enclose the paper with the product being returned 8 Carefully package the product to be returned using anti static packaging We will not be responsible for products damaged in transit for repair 7 Write the RMA number on the outside of the package 8 Ship the package to Real Time Devices Finland Oy Lepolantie 14 FIN O00660 Helsinki FINLAND DM5856HR DM6856HR 23 RTD Finland Oy User s Manual Limited Warranty Real Time Devices warrants the hardware and software products it manufactures and produces to be free from defects in materials and workmanship for one year following the date of shipment from REAL TIME DEVICES This warranty is limited to the original purchaser of product and is not transferable During the one year warranty period REAL TIME DEVICES will repair or replace at its option any defective products or parts at no additional charge provided that the product is returned shipping prepaid to REAL TIME DEVICES All replaced parts and products become the property of REAL TIME DEVICES Before returning any product for repair customers are required to contact
17. nect the board to the I O devices using the twisted pair 50 pin flat cable Aluminium Heateink EPWRIO4 CMV586Dx 133 DM5856 Fig 3 1 DM5856HR DM6856HR integrated in a PC 104 RTD cpuModule stack DM5856HR DM6856HR 12 RTD Finland Oy User s Manual 3U rack or enclosure installation with a EUROCARD CPU with one DM5856HR The PC 104 system can easily be inserted into a 19 rack installation using the CPU as a form factor adapter Assemble your PC 104 data modules on a RTD single board EUROCARD computer and install the system in a 19 enclosure Multiple DM5856HR boards can be easily connected to this system See figure 3 2 below 56 PIN EXPANSION CONNECTOR DM5856 50 PIN EXPANSION CONNECTOR RTD dataModule EUROCARD AT 96 CPU WITH PC NO4 EXPANSION BUS Fig 3 2 19 Eurocard rack installation with an integrated PC 104 dataModule and EUROCARD cpuModule computer system DM5856HR DM6856HR 13 RTD Finland Oy User s Manual External I O Connections Table 3 1 below shows the input wire connection pin outs PIN number Signal Description PINnumber Signal Description 1 2 INT 3 IN2 5 n2 Je mc 7 ens de IN 9 IN4 11 C 13 INS 15 IN6 17 ine Je mc 19 IN7 21 IN8 23 25 27 29 31 33 35 37 39 41 43 45 47 49 53 1 8 0 6 GND ss J3 2 7 J3 3 HCPL 700 Fig 3 3 This diagram illustrates the input connection for channel 1 DM5856HR DM68
18. otection Single 5V operation RTD IDAN compatible XT DM5856HR and AT DM6856HR boards available Support for direct PC 104 interface with RTD dataModules PC 104 compliant The following paragraphs briefly describe the major features of the DM5856HR and DM6856HR A more detailed discussion is included in Chapter 3 Hardware description and in Chapter 4 Board operation and programming The board set up is described in Chapter 1 Board Settings Isolated Digital Outputs 16 optocoupler outputs may be used to directly drive loads such as relays lamps or to interface to commonly encountered 24V PLC I O s The outputs are driven with an open collector optocoupler output capable of sinking 8mA at 30V Each output channel can be connected to a different potential The isolated outputs are controlled with a latch structure Isolated Digital Inputs 16 optocoupler inputs may be used to connect high voltage signals to a computer Eight channel by channel isolated input ranges are available The factory installed input range is 5V but this input range may be customized channel by channel by changing the input series resistors The optocoupler inputs have a reverse voltage protection diode across the input This enables AC connection to the inputs where the input diode acts as a rectifier Mechanical description The DM5856HR is designed on a PC 104 form factor An easy mechanical interface to both PC 104 and EUROCARD systems can be achiev
19. s more complex 3 To clear multiple bits in a port AND the current value of the port with the value B where B 255 the sum of the values of the bits to be cleared Note that the bits do not have to be consecutive 4 To set multiple bits in a port OR the current value of the port with the value B where B sum of the individual bits to be set DM5856HR DM6856HR 20 RTD Finland Oy User s Manual Isolated Output Programming The optoisolated outputs are controlled with a register structure These outputs can be commanded in the following ways examples in C syntax 1 Software controlled byte write outp BA low_byte outp BA high_byte 2 Software controlled direct word write outpw BA word Isolated Input Programming The optoisolated inputs are read from a data latch These inputs can be interrogated in the following ways examples in C syntax 1 Software controlled byte read low_data inp BA high_data inp BA 1 2 Software controlled direct word read word_data inpw BA DM5856HR DM6856HR 21 RTD Finland Oy User s Manual Chapter 6 DM5856HR DM6856HR SPECIFICATIONS Host Interface Jumper selectable base address I O mapped Digital Outputs isolated Number of lines Isolation voltage Output stage Output supply voltage Digital Inputs isolated Number of lines Triggering voltage 5V range Maximum input voltage factory default 5V range Isolation voltage Conn
20. two major parts 1 Optocouplers 2 Input latch 1 Optocouplers Small SMD optocouplers are used to isolate each channel of the isolated inputs Individual optocouplers are used for each channel The optocouplers are directly connected to the input latch in an inverting configuration A reverse voltage protection diode is connected across the optocoupler input The input voltage range can be customized channel by channel by changing the input series resistor The factory preinstalled input voltage is 5V or TTL The threshold voltage is approximately 3 2 to 3 4V To customize the input range to a different one please change the input resistor The nominal value of the 5V range input resistor is 1 KOhm The forward voltage of the optocoupler is 1 25 1 7V The triggering current is about 1 6mA This for example if you require a 24V input range you need to calculate the series resistor as follows Nominal input voltage 24V Trigger voltage 20V could be set to something else too Forward current at 20V 1 6mA Diode forward voltage drop 1 7V Series resistor 222 Formula 20V 1 7V 0 5mA Rs gt Rs 11 43 KOhms Round to 11K The absolute maximum forward current of the optocoupler is 20mA The maximum allowed voltage with the factory set 5V range is 18V 2 Input latch The inverting optocouplers are connected to two 8 bit data latches that are directly addressable with a read operation at address BASE 0 and BASE 1 DM5856HR
21. umper setting for the DM5856HR DM6856HR It also shows the board layout of the DM5856HR DM5856HR and the locations of the jumpers The following paragraphs explain how to change the factory jumper settings to suit your specific application Table 2 1 Factory jumper settings see figure 2 1 below for detailed locations Jumper name Jumper description Number of Jumpers Factory setting jumpers installed Base address Base address eT 300h JOT eefa G DASASE Poisi A iooi os a mee ro am s i a 18 vt E E i DUS056 SETA Bad AEA rh E aie eer a a cin ee eert Oy bee tome beret Hopa Cr Figure 2 1 Board layout showing jumper locations Figure shows DM6856HR board DM5856HR DM6856HR 9 RTD Finland Oy User s Manual Base address Jumpers Factory setting 300h The most common cause of failure when you are first setting up your module is address contention Some of the I O space of your computer is already occupied by other internal I O devices and expansion boards When the board attempts to use it s own reserved I O addresses which are being already used by another peripheral device erratic performance may occur and the data read from the board may be corrupted To avoid this problem make sure you set up the base address first using the eight jumpers marked BASE ADDRESS It allows you to choose from 256 different I O addresses in your computer I O map Should the factory installed
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