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iDAQ-934_964 User Manual

22

Low Conversion Rate ADC Analog Input Module

For iDAQ modules measuring slow varying signals such as temperature, strain, or

pressure, the conversion rate of the ADC is usually accordingly slow. To prevent the

sample rate from being limited to a low value due to this characteristic when synchro

-

nizing low conversion rate ADC analog input modules with other types of iDAQ mod

-

ules, the sample rate of the module and conversion rate of the ADC are

independently set.
If the sample rate is higher than the conversion rate, multiple samples from the same

conversion result are provided. This is shown in Figure 3.13.

Figure 3.13 Acquisition of a low conversion rate ADC analog input module

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Содержание iDAQ-934

Страница 1: ...User Manual iDAQ Chassis iDAQ 934 iDAQ 964...

Страница 2: ...sumes no liability under the terms of this warranty as a consequence of such events Because of Advantech s high quality control standards and rigorous testing most customers never need to use our repa...

Страница 3: ...harmful interference when the equipment is operated in a commercial environment This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with th...

Страница 4: ...in connector x 1 DIN Rail Kit x 2 each set has screws x 2 frame x 1 buckle x 1 Startup Manual x 1 iDAQ 964 iDAQ 964 x 1 Screw x 3 Startup Manual x 1 Warning Warnings indicate conditions that if not ob...

Страница 5: ...ur liquid into an opening This may cause fire or electrical shock 13 Never open the equipment For safety reasons the equipment should be opened only by qualified service personnel 14 If any of the fol...

Страница 6: ...To avoid electrical shock always disconnect the power from the PC chassis before manual handling Do not touch any components on the CPU card or other cards while the PC is powered on Disconnect the po...

Страница 7: ...allation Guide of iDAQ 964 8 2 2 Mounting 9 2 2 1 DIN rail mount 9 Figure 2 2 DIN Rail assembly for iDAQ 934 9 2 2 2 Wall mount 10 Figure 2 3 Wall mount dimensions 1 10 Figure 2 4 Wall mount dimension...

Страница 8: ...3 4 2 Buffered Analog Output Waveform Generation 24 Figure 3 18Buffered analog output waveform generation 24 Figure 3 19Start and stop of the analog output waveform genera tion 25 Figure 3 20Start and...

Страница 9: ...tor 32 Appendix A Specifications 35 A 1 Analog Input 36 A 2 Analog Output 36 A 3 Digital Input 36 A 4 Digital Output 36 A 5 Counter 36 A 6 Programmable Function Pins PFP 36 A 7 General 37 A 8 Function...

Страница 10: ...iDAQ 934_964 User Manual x...

Страница 11: ...Chapter 1 1 Start Using iDAQ Chassis...

Страница 12: ...n measurements Data are transferred to or from the host computer through a Super Speed USB 3 0 interface iDAQ 964 on the other hand is a four slot data acquisition chassis with similar design as iDAQ...

Страница 13: ...er Manual Chapter 1 Start Using iDAQ Chassis IDAQ 964 Figure 1 2 Front View of iDAQ 964 Number Component 1 LED indicators 2 Slots for iDAQ modules 3 Programmable function pin PFP BNC connectors 4 PCI...

Страница 14: ...the operational status of the iDAQ chassis Refer to 3 7 Status Indication for detailed description 1 3 5 Programmable Function Pin PFP The programmable function pins provide bi directional multi funct...

Страница 15: ...vi installer so that the iDAQ modules will be recognized by your system The driver package can be found on the Advantech Support Portal https www advantech com support Search for iDAQ on the support p...

Страница 16: ...talled via XNavi installer They can be found under C Advantech DAQNavi default directory after the finishing the installation 1 7 Application Software DAQNavi MCM DAQNavi MCM is an application softwar...

Страница 17: ...Chapter 2 2 Installation Guide...

Страница 18: ...modules are installed the device can be configured using the Advantech Navigator Program automatically installed during driver setup Note that the iDAQ modules would only be recognized when the module...

Страница 19: ...along with the package Please make sure that the mounting kit is well packed and components are completely included as follow 2 x frames 2 x buckles 4 x screws If anything is missing please contact lo...

Страница 20: ...e iDAQ 934 chassis module slot area Those are the holes reserved for the wall mount The following figures indicate the dimensions for mount ing the iDAQ 934 chassis in a wall mounting scenario unit mm...

Страница 21: ...are the steps to insert the iDAQ modules into the iDAQ chassis 1 Insert the module following the guide rail to the end 2 Screw the two screws tight onto the chassis note that you should balance the de...

Страница 22: ...Q chassis uses a 2 pin connector as power connector for 10 30 VDC power supply The following is the description for the pins For detailed specification regard ing to power aspect please refer to A7 Fi...

Страница 23: ...Chapter 3 3 Function Details Interface Introduction...

Страница 24: ...ngine which means every slot can use different timing signals start trigger stop trigger and sample clock to perform independent acquisition tasks For example one of the slots may be acquiring analog...

Страница 25: ...s Signal from one of the slots There is a programmable clock divider on the chassis for each acquisition engine Refer to A 6 Acquisition Engine for possible output frequency Sample clock is always ris...

Страница 26: ...e analog input functions please refer to the document of the individual iDAQ module 3 3 1 Instant Analog Input Acquisition With instant analog input acquisition the software controls the sample timing...

Страница 27: ...5 Figure 3 5 Buffered analog input acquisition The start and stop of the acquisition are controlled by the start trigger and stop trig ger respectively When configuration is completed the acquisition...

Страница 28: ...onversion rate is configurable and the sample rate can be much higher by using hardware sample clock signal Time between samples is deterministic 3 3 3 Analog Input Convert Clock Signal Behavior While...

Страница 29: ...enabled channels The MUX routes one of the enabled channels for each convert clock in the order of channel number Figure 3 9 shows an example when 3 analog input channels 0 1 and 2 are enabled By this...

Страница 30: ...rises the ADC of all enabled channels start con version simultaneously The sampled results represent the analog input values at the same time Figure 3 10 and Figure 3 11 show the block diagram and ac...

Страница 31: ...s such as where N 1 2 4 8 etc Before starting acquisition a synchronization pulse will be sent to each sigma delta ADC analog input modules to reset the ADCs at the same time This synchronization puls...

Страница 32: ...ng limited to a low value due to this characteristic when synchro nizing low conversion rate ADC analog input modules with other types of iDAQ mod ules the sample rate of the module and conversion rat...

Страница 33: ...sults becomes high only when analog input signal becomes higher than the upper threshold value it becomes low only when analog input signal becomes lower than the lower threshold value it remains unch...

Страница 34: ...n write static analog output sample command The ana log output voltage or current remains unchanged at other times This is shown in Fig ure 3 17 Figure 3 17 Static analog output update 3 4 2 Buffered...

Страница 35: ...samples after receiving the corresponding trigger signal As shown in Figure 3 20 the start of gen eration is delayed by 3 samples after receiving a start trigger and the stop of genera tion is delaye...

Страница 36: ...igital input channels can generate software interrupts or events to notice the application about the state change of input signals Interrupts can occur at rising edge falling edge or both edges of the...

Страница 37: ...e bit the pattern match interrupt will be generated as shown in Figure 3 24 Figure 3 24 Digital input pattern match interrupt for pattern 10xx0100 Digital Input Debounce Filter To prevent false interr...

Страница 38: ...digital input channels is sampled as shown in Figure 3 26 Figure 3 26 Instant digital input acquisition 3 5 3 Buffered Digital Input Acquisition With buffered digital input acquisition the sample rat...

Страница 39: ...e delayed in number of samples after receiving the corresponding trigger signal As shown in Figure 3 29 the start of acquisition is delayed by 3 samples after receiving a start trigger and the stop of...

Страница 40: ...ted only when the soft ware sends an write static digital output sample command The digital output state remains unchanged at other times This is shown in Figure 3 30 Figure 3 30 Static digital output...

Страница 41: ...elayed in number of samples after receiving the corresponding trigger signal As shown in Figure 3 33 the start of gen eration is delayed by 3 samples after receiving a start trigger and the stop of ge...

Страница 42: ...bining chassis ID model name and slot number You can change the description in Navigator or just leave it as default The descrip tion is used in your own program in order to get control or device hand...

Страница 43: ...Chapter 3 Function Details The rotary switch and the its corresponded number can be found in below table Switch Position Chassis ID Switch Position Chassis ID 0 0 8 8 1 1 9 9 2 2 A 10 3 3 B 11 4 4 C 1...

Страница 44: ...iDAQ 934_964 User Manual 34...

Страница 45: ...Appendix A A Specifications...

Страница 46: ...ations of individual iDAQ digital output module A 5 Counter Please refer to the specifications of individual iDAQ counter module A 6 Programmable Function Pins PFP Channels BNC x 2 Direction Input or...

Страница 47: ...4 F to 140 F Storage temperature 40 C to 70 C 40 F to 158 F Operating humidity 10 to 90 RH non condensing Storage humidity 5 to 95 RH non condensing Vibration 5Grms random 5 500Hz 1hr axis Shock 30G...

Страница 48: ...iDAQ 934_964 User Manual 38 A 8 Function Block iDAQ 934 iDAQ 964...

Страница 49: ...Appendix B B System Dimensions...

Страница 50: ...iDAQ 934_964 User Manual 40 B 1 Chassis iDAQ 934...

Страница 51: ...41 iDAQ 934_964 User Manual Appendix B System Dimensions iDAQ 964...

Страница 52: ...iDAQ 934_964 User Manual 42 B 2 Mounting Wall Mount for iDAQ 934...

Страница 53: ...43 iDAQ 934_964 User Manual Appendix B System Dimensions...

Страница 54: ...re subject to change without notice No part of this publication may be reproduced in any form or by any means such as electronically by photocopying recording or otherwise without prior written permis...

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