PCM-3813I User Manual
Contents
1. Figure 4 3 Calibration Step 1 Figure 4 4 Calibration Step 2 Figure 4 5 Calibration Step 3 Figure 4 6 Calibration Step 4 Figure 4 7 Calibration Step 5 vii Table of Contents PCM 38131 User Manual viii Chapter 1 Overview 1 1 Introduction PCM 38 131 is a 12 bit 32 channel analog input card applied on PCI 104 It provides 32 analog input channels with 100k samples s 12 bit resolu tion and 2500 VDC isolation protection PCI bus Plug and Play The dedicated PCI controller is embedded on PCM 38131 to interface with PCI bus It fully implements the PCI bus specification Rev 2 1 including all bus relative configurations such as base address and inter rupt assignment automatically controlled by software Flexible Input Types and Range Settings The 38131 features an automatic channel gain scanning circuit Rather than software which controls multiplexer switching during sam pling the on board register stores different gain values and configura tions for each channel This design lets you perform multi channel sampling with different gains for each channel and free combination of single ended and differential inputs High speed Data Acquisition The PCM 3813I provides a sampling rate up to 100k samples s Its onboard ring buffer can store up to 1K A D samples2. PCM 38131 100 kS s 12 bit 32 ch Isolated Analog Input Module User Manual Copyright The documentation and the software included with this product are copy righted 2009 by Advantech Co Ltd All rights are reserved Advantech Co Ltd reserves the right to make improvements in the products described in this manual at any time without notice No part of this man ual may be reproduced copied translated or transmitted in any form or by any means without the prior written permission of Advantech Co Ltd Information provided in this manual is intended to be accurate and reli able However Advantech Co Ltd assumes no responsibility for its use nor for any infringements of the rights of third parties which may result from its use Acknowledgements Intel and Pentium are trademarks of Intel Corporation Microsoft Windows and MS DOS are registered trademarks of Microsoft Corp All other product names or trademarks are properties of their respective owners Part No 2003M81311 2nd Edition Printed in Taiwan May 2009 PCM 38131 User Manual ii Product Warranty 2 years Advantech warrants to you the original purchaser that each of its prod ucts will be free from defects in materials and workmanship for two years from the date of purchase This warranty does not apply to any products which have been repaired or altered by persons other than repair personnel authorized by Advantech or which have been subject to
3. 11 12 An am 24 12 13 414 A3 es 25 A111 AM4 15 16 A15 xul 26 A13 AGND 17 418 AGND en s 27 115 AGND 20 AGND 28 GND AM6 21 22 ang 11 22 SND AM8 23 24 A9 ang 12 20 7 120 25 26 AI21 Apo 1 21 A9 122 27 28 Al23 Ap2 14 92 021 Al24 29 30 125 Apa 15 93 023 Al26 31 32 A27 ape 4g 24 25 AI28 33 34 AI29 aps 47 35 027 AI30 35 36 AI31 ag 36 A2 EXT_TRG 37 38 DGND Ext 19 37 AI31 DGND 39 40 DGND Ws DB37 Wiring Board 40 PIN BOX HEADER PCM 38131I User Manual 12 Signal Name Reference Direction Description Al 0 31 Al GND Input Analog Input channel 0 to 31 Each channel pair Al lt i i 1 gt i 0 2 4 30 can be configured as either two single ended inputs or one differential input GND Ground These pins are the reference points for single ended mea surements and the bias current return point for differential mea surement EXT_CLK AIGND Input A D External Clock This pin is the external trigger signal input for the A D conver sion low to high edge triggers A D conversion to happen 3 3 Analog Input Connections This section continues to describe how to make analog input signal con nections to the 38131 card via the I O connector Single ended Channel Connections The single ended input conf
4. 201 Vs 2 1 _ 9 59 Gain error V 777201 0 596 External Trigger Source Connection In addition to pacer triggering the PCM 3813I card also allows external triggering for A D conversions A low to high edge coming from EXT will trigger an A D conversion on the PCM 3813I board Note Don t connect any signal to the EXT TRG pin when the external trigger function is not being used Note If you use external triggering for A D conversions we recom mend you choose differential mode for all analog input signals so as to reduce the cross talk noise caused by the external trigger source Note No any guaranteed voltage level would appear on a floating chan nel and the measurement data from any floating channel is invalid You could get more detail information from products FAQ on our website 3 3 1 Mitigating Cross Talk Interference Generally the multiplexer MUX will be used in the card to select ana log input signals one by one and output them into a single line for A D conversion This allows all analog signal input signals share one amplifier and A D converter as shown below AIO AI AI6 AI7 Amplifier A D Convertor MUX PCM 38131 User Manual 16 Because of this electronic architecture some electric charge will remain during the switching of channels done by MUX This will lead to interfer ence on analog input signals that are not physically connected to any volt age or current signals In this situatio
5. ON OFF 2 ON ON OFF ON 3 ON ON OFF OFF 4 ON OFF ON ON 5 ON OFF ON OFF 6 ON OFF OFF ON 7 ON OFF OFF OFF 8 OFF ON ON ON 9 OFF ON ON OFF 10 OFF ON OFF ON 11 OFF ON OFF OFF 12 OFF OFF ON ON 13 OFF OFF ON OFF 14 OFF OFF OFF ON 15 OFF OFF OFF OFF Default 9 Chapter 2 SW2 Select the appropriate IDSEL CLK and INT signals for the expansion module Switch Value Module Slot CLK INTO IDSEL 0 0 CLKO INTA IDSELO 1 1 CLK1 INTB IDSEL1 2 2 CLK2 INTC IDSEL2 3 3 CLK3 INTD IDSEL3 Default PCM 3813I User Manual 10 CHAPTER Signal Connections Sections include Overview I O Connector Analog Input Connections Field Wiring Considerations Chapter 3 Signal Connections 3 1 Overview Correct signal connections are one of the most important factors in ensur ing that your application system is sending and receiving data correctly A good signal connection can avoid much unnecessary and costly dam age to your valuable PC and other hardware devices This chapter will provide some useful information about how to connect analog input sig nals to the PCM 38 13 card via the I O connector 3 2 1 0 Connector The I O connector for the PCM 38131 is a 40 pin box header The follow ing is the pin assignment PCM 3813I Side Cable Side EE in 5 a Alt 2 2 AM 5 6 A5 ju 21 AB A6 7 8 A7 22 5 9 10 A9 mel 23 A7 AMO
6. misuse abuse accident or improper instal lation Advantech assumes no liability under the terms of this warranty as a consequence of such events Because of Advantech s high quality control standards and rigorous test ing most of our customers never need to use our repair service If an Advantech product is defective it will be repaired or replaced at no charge during the warranty period For out of warranty repairs you will be billed according to the cost of replacement materials service time and freight Please consult your dealer for more details If you think you have a defective product follow these steps 1 Collect all the information about the problem encountered For example CPU speed Advantech products used other hardware and software used etc Note anything abnormal and list any onscreen messages you get when the problem occurs 2 Call your dealer and describe the problem Please have your man ual product and any helpful information readily available 3 If your product is diagnosed as defective obtain RMA return merchandize authorization number from your dealer This allows us to process your return more quickly 4 Carefully pack the defective product a fully completed Repair and Replacement Order Card and a photocopy proof of purchase date such as your sales receipt in a shippable container A product returned without proof of the purchase date is not eligible for war ranty service 5 Wri
7. UIPMENT SHOULD BE IN A CONTROLLED ENVIRONMENT 16 CAUTION DANGER OF EXPLOSION IF BATTERY IS INCORRECTLY REPLACED REPLACE ONLY WITH THE SAME OR EQUIVALENT TYPE RECOMMENDED BY THE MANUFACTURER DISCARD USED BATTERIES ACCORD ING TO THE MANUFACTURER S INSTRUCTIONS The sound pressure level at the operator s position according to IEC 704 1 1982 is no more than 70 dB A DISCLAIMER This set of instructions is given according to IEC 704 1 Advantech disclaims all responsibility for the accuracy of any statements contained herein PCM 38131 User Manual vi Contents Chapter OV aa Cehi Linea 2 Introd ction eee RSEN eS 2 Beat resti stra a E ETE INTO edere Oe Mes 3 Specifications neer ro nd adve TU de 3 1 1 2 3 Chapter 2 Installation ss 6 1 2 3 4 Initial Inspection Unpacking Installation Instructions Setting the Switch Table 2 1 BoardID Setting SW1 Chapter 3 Signal Connections ses 12 Ball OVertVIeWxcasesaninecietent 32 I O Gonnector xor rere de teen 3 3 Analog Input Figure 3 1 Single ended Input Ch 14 3 3 1 Mitigating Cross Talk Interference 4 Field Wiring Considerations Chapter 4 Calibration siscccssssessscecccsecsssensnceeseseseansseensseses 20 1 2 Introduction x eren eee tete Calibration Procedure Figure 4 1 Launching the Device Settings Figure 4 2 Launching the Calibration
8. and generates an interrupt signal when there is sufficient data inside the buffer This feature provides continuous high speed data transfer and more predictable per formance on Windows systems Supports Software Internal and External Pacer Sampling The PCM 38 131 supports two kinds of trigger modes for A D conversion software polling and pacer triggering The former allows users to acquire a sample immediately the internal pacer triggers continuous high speed data acquisition The 38131 also accepts external trigger sources allowing synchronous sampling with external devices PCM 38131 User Manual 2 Satisfies the Need for Isolation Protection The 38131 provides optical isolation protection up to 2500 VDC between the inputs and the PC bus to prevent the PC and peripherals from damage due to high voltage It is ideal for users who require flexibility stability and a high level of isolation protection 1 2 Features 32 single ended or 16 differential analog inputs or a combination 12 bit A D converter with up to 100 kHz sampling rate Programmable gain for each input channel Automatic channel gain scanning Onboard ring buffer 1024 samples S W polling internal or external pacer sampling mode support Isolation protection 2500VDC Board ID 1 3 Specifications Analog Input Channels 32 single ended or 16 differential software programmable Resolution 12 bit Onboard ring buffer 1K samples Inpu
9. duction Calibration Chapter 4 Calibration 4 1 Introduction The 38131 has been calibrated at the factory for initialuse You are not required to calibrate the PCM 38131 in normal conditions However if calibration is required the procedure explained below To perform an effective calibration prepare a standard 4 1 2 digit resolution stable and low noise DC voltage source It is important as the accuracy of the device will depend on the accuracy of the DC source 4 2 Calibration Procedure Click the Setup button on the Advantech Device Manager window Fig 4 1 to launch the PCM 3813I Device Setting window Fig 4 2 Advantech Device Manager Your ePlatform Partner ADMANTECH 0277 Installed Devices EAB My Computer 002 PCM 3813I P BID 15 gt 5 Supported Devices Advantech DEMO Board Advantech PCI 1680 Advantech PCI 1710 L HG HGL lt lt Advantech PCI 1711 Advantech PCI 1711L PCI 1731 Advantech PCI 1712 Advantech PCI 1713 lt lt Advantech PCI 1714 UL Advantech PCI 1715U _Bemove __ About Exon Figure 4 1 Launching the Device Settings PCM 38131 User Manual 20 PCM 3813I P Device Setting General Analog Input Channel Configuration M The channel settings will be applied to all channels All channels single ended All channels differential All channels ranges 445 m Click More button to configure the More channel indi
10. er between 2047 and 2048 Figure 4 6 Calibration Step 4 23 Chapter 4 A D Calibration Wizard Analog Input Decimal output code Voltage output code The A D calibration is finished 1 Figure 4 7 Calibration Step 5 PCM 38131 User Manual 24
11. he following suggestions will be helpful when running signal wires between signal sources and the PCM 38 131 card Please make sure that you have carefully routed signal cables to the card You must separate the cabling from noise sources Try to keep video monitors far away from the analog signal cables because these are a common noise source in a PCI data acquisition system If you want to reduce common mode noise try to use differential analog input connections If you do not want your signals to be affected when travelling through areas with high electromagnetic interference or large mag netic fields try the following routing techniques Use individually shielded twisted pair wires to connect analog input signals to the board i e the signals connected to the High and Low inputs aretwisted together and covered with a shield Finally connect the shield only to one point at the signal source ground Make sure that your signal lines do not travel through conduits because these may contain power lines Also keep your signals far from electric motors breakers or welding equipment as these can create magnetic fields Keep a reasonable distance between high voltage or high current lines and signal cables connected to the 38131 card if the cables run parallel or route signal cables at right angles to high voltage current cables PCM 38131I User Manual 18 CHAPTER Calibration Sections include Intro
12. iguration has only one signal wire for each channel and the measured voltage Vm is the voltage of the wire referred to the common ground A signal source without a local ground is also called a floating source It is fairly simple to connect a single ended channel to a floating signal source In this mode the PCM 3813I card provides a reference ground for external floating signal sources 13 Chapter 3 Internal External AIO H Floating C Vs Signal Multiplexers AI31 Measured Voltage Connector Figure 3 1 Single ended Input Ch Differential Channel Connections The differential input configuration has two signal wires for each chan nel and the differential input responds only to voltage differences between High and Low inputs On the PCM 3813I card when all chan nels are configured to differential input up to 16 analog channels are available Internal i External Ground Referenced Signal Source Measured Voltage Figure 3 2 Differential Input Ch Grounded PCM 38131 User Manual 14 If one side of the signal source is connected to a local ground the signal source is ground referenced The ground of the signal source and the ground of PCM 3813I will not be at exactly the same voltage as they are connected through the ground return of the equipment and building wiring The difference between the ground voltages forms a common mode
13. m humidity Put this equipment on a reliable surface during installation Drop ping it or letting it fall may cause damage The openings on the enclosure are for air convection Protect the equipment from overheating DO NOT COVER THE OPENINGS Make sure the voltage of the power source is correct before con necting the equipment to the power outlet Position the power cord so that people cannot step on it Do not place anything over the power cord All cautions and warnings on the equipment should be noted If the equipment is not used for a long time disconnect it from the power source to avoid damage by transient overvoltage Never pour any liquid into an opening This may cause fire or elec trical shock Never open the equipment For safety reasons the equipment should be opened only by qualified service personnel If one ofthe following situations arises get the equipment checked by service personnel a The power cord or plug is damaged b Liquid has penetrated into the equipment c The equipment has been exposed to moisture d The equipment does not work well or you cannot get it to work according to the user s manual e The equipment has been dropped and damaged f The equipment has obvious signs of breakage 15 DO NOT LEAVE THIS EQUIPMENT IN AN ENVIRONMENT WHERE THE STORAGE TEMPERATURE MAY GO BELOW 20 C 4 F OR ABOVE 60 C 140 F THIS COULD DAM AGE THE EQUIPMENT THE EQ
14. n you ll see AI readings of unconnected channels being influenced by adjacent channels and the value will be floating To mitigate this two measures can be taken 1 Connect unused channels to the ground Once an analog input channel is connected to the ground all the remaining electric charges are released Thus no interference on the next channel will occur 2 Use a pull low resistor Inserting a pull low resistor in parallel to the AI channel is very common to detect whether the sensor and signal input wire is dropped broken or disconnected External Internal Im V Rin GND Please note that a voltage drop will be expected due to the insertion of the pull low resistor In the figure as shown above a voltage drop between Vour and Vin is caused and its value is V OUT Rour Ry Rx R Ro XI our X4 jy X For example if the input impedance is 100M sensor equivalent volt age source is 10V sensor equivalent output resistor is 100 A pull low resistor with the resistance of 10M will result in a voltage drop of voltage in the AI measurement as calculated below 10 100 100 100 10 100M 100 9090909 1 X1 100 0 1m V 17 Chapter 3 3 4 Field Wiring Considerations When you use the PCM 3813I card to acquire outside data environmen tal noise can seriously affect the accuracy of your measurements if you don t provide any protection T
15. nect connector J1 of the PCM 3813I card to the PCI 104 con nector Carefully align the pins with the PCI 104 connector Slide the module into the connector The module pins may not slide all the way into the connector do not force the pins into place or the module may be damaged 6 Fasten the module to the CPU card by using the included brass screw Screw the brass spacer into the threaded hole on the CPU card Do not tighten too much or the threads may be damaged 7 Attach any accessories to 38131 using 40 pin flat cables 8 Reinstall the CPU card and replace the system unit cover Recon nect the cables you removed in step 2 Plug in and turn on the power This completes the hardware installation Install the soft ware driver as described in the following section 7 Chapter 2 2 4 Setting the Switch The following figure will show you the locations for SW1 amp SW2 00000000000000000000 2m0000000000000000000 m VR4 o PCM 3813I User Manual 8 SW1 Board ID Selection When there are multiple cards on the same chassis this Board ID setting is useful for identifying each card s device number We set the PCM 38131 Board ID switch to 0 at the factory If you need to adjust this set ting please see below Table 2 1 BoardID Setting SWI BoardiD DEC Switch Position ID3 ID2 ID1 IDO 0 ON ON ON ON 1 ON ON
16. t Range e Bipolar 10 V 5 V 2 5 V 1 25 V 0 625 V e Unipolar 0 10 V 0 5 0 2 5 V 0 1 25 V Maximum Input Overvoltage 30 V Maximum sampling rate 100 kHz Accuracy depending on gain Gain Accuracy 0 5 1 0 1 of FSR 1LSB 2 0 2 of FSR 1LSB 4 0 2 of FSR 1LSB 8 0 4 of FSR 1LSB 3 Chapter 1 Linearity error 1 LSB Input impedance 1G ohm Trigger mode Software on board programmable pacer or external Trigger Input TTL level Logic 0 0 4V max Logic 1 2 0V min General I O Connector 40 pin box header Dimensions 96 mm x 90 mm 3 8 x 3 5 Power consumption 5 V 850 mA Typical 5 V 1 0 A Max Operating temperature 0 60 C 32 140 F Storage temperature 20 70 4 158 F Operating humidity 5 95 RH non condensing PCM 38131 User Manual 4 CHAPTER Installation Sections include Initial Inspection Unpacking Installation Instructions Chapter 2 Installation 2 1 Initial Inspection Before installing the PCM 38131 check the card for visible damage We have carefully inspected the card both mechanically and electrically before shipment It should be free of marks and in perfect order upon receipt As you unpack the PCM 38131 check it for signs of shipping damage damaged box scratches dents etc If it is damaged or fails to meet specifications notify our service department or your local sales represen tati
17. te the RMA number visibly on the outside of the package and ship it prepaid to your dealer iii Declaration of Conformity CE This product has passed the CE test for environmental specifications when shielded cables are used for external wiring We recommend the use of shielded cables This kind of cable is available from Advantech Please contact your local supplier for ordering information Technical Support and Assistance Step 1 Visit the Advantech web site at www advantech com support where you can find the latest information about the product Step 2 Contact your distributor sales representative or Advantech s cus tomer service center for technical support if you need additional assistance Please have the following information ready before you call Product name and serial number Description of your peripheral attachments Description of your software operating system version appli cation software etc A complete description of the problem The exact wording of any error messages PCM 38131 User Manual iv Safety Instructions 1 25 3 Read these safety instructions carefully Keep this User s Manual for later reference Disconnect this equipment from any AC outlet before cleaning Use a damp cloth Do not use liquid or spray detergents for clean ing For plug in equipment the power outlet socket must be located near the equipment and must be easily accessible Keep this equipment away fro
18. ve immediately Also call the carrier immediately and retain the ship ping carton and packing materials for inspection by the carrier We will then make arrangements to repair or replace the unit 2 2 Unpacking The PCM 38131 contains components that are sensitive and vulnerable to static electricity Discharge any static electricity on your body to ground by touching the back of the system unit grounded metal before you touch the board Remove the PCM 38131 card from its protective packaging by grasping the card s rear panel Handle the card only by its edges to avoid static dis charge which could damage its integrated circuits Keep the antistatic package Whenever you remove the card from the PC protect the card by storing it in this package You should also avoid contact with materials that hold static electricity such as plastic vinyl and styrofoam Check the product contents inside the packing There should be one card one CD ROM and this manual Make sure nothing is missing PCM 3813I User Manual 6 2 3 Installation Instructions 1 the PC s power off Turn off the power of any peripheral devices such as printers and monitors 2 Disconnect the power cord and any other cables from the back of the computer 3 Remove the system unit cover see the user s guide for your chassis if necessary 4 Remove the CPU card from the chassis if necessary to gain access to the card s PCI 104 connector 5 Con
19. vidually x r Scan channel Select the number of first channel and the count of channel to set the scanning channels Start channel Channel count pp ly Figure 4 2 Launching the Calibration 21 Chapter4 Please follow the 5 steps below to finish your calibration A D Calibration Wizard Analog Input Decimal output code Voltage output code Step 1 PGIA_OFFSET1 QD Connect analog input channel AIO to the around Adjust VR4 until the output codes from the card s AIO flicker between 2047 and 2048 Figure 4 3 Calibration Step 1 A D Calibration Wizard Analog Input Decimal output code Voltage output code aN Step 2 B OFFSET C E Connect a DC voltage source of 4 9959 0 5 LSB to AID Adjust VR2 until the output codes from card s AIO flicker between 0 and 1 Cancel Figure 4 4 Calibration Step 2 PCM 38131 User Manual 22 A D Calibration Wizard Analog Input Decimal output code Voltage output code P Step 3 AD FS QD Connect a DC voltage source of 4 9953 4094 5 LSB to Ald Adjust VR1 until the output codes from card s AID flicker between 4094 and 4095 Repeat step 2 to 3 until no need to adjust VR2 and VRi1 A D Calibration Wizard Analog Input Decimal output code Voltage output code w Step 4 U OFFSET x Connect a DC voltage source of 4 9959 2047 5 LSB to Adjust until the output codes from the card s flick
20. voltage Vem To avoid the ground loop noise effect caused by common mode voltages you can connect the signal ground to the Low input Figure 3 3 shows a differential channel connection between a ground referenced signal source and an input channel on the 38131 card With this connec tion the rejects a common mode voltage V m between the signal source and the 38131 ground shown as Vom in Figure 3 3 Internal H External Multiplexer Multiplexer Floating S Signal Source Measured Voltage Vm Figure 3 3 Differential Input Ch Floating If a floating signal source is connected to the differential input channel the signal source may exceed the common mode signal range of the PGIA and the PGIA will be saturated with erroneous voltage readings You must therefore reference the signal source to the AIGND Figure 3 4 shows a differential channel connection between a floating signal source and an input channel on the 38131 card In this figure each side of the floating signal source is connected through a resistor to the AIGND This connection can reject the common mode voltage between the signal source and the 38131 card ground 15 Chapter 3 rs 1 Vs ideal signal source Vi measured signal source Vi rs output impedance of signal source la lb series wound resistors 200 200 jm V s V V s Vs Fs l a Fb 1 200 y
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