L-Card E20-10 User manual

User manual
DAQ SYSTEMS DESIGN, MANUFACTURING & DISTRIBUTION
http://en.lcard.ru
[email protected]
Revision 2.01.00
October 2017
E20-10
E20-10-1
E20-10-D
E20-10-D-1
E20-10-D-I
E20-10-D-1-I
Measuring voltage converters
A family of universal modules of the ADC, DAC

Author of the manual:
A.V. Garmanov
L-CARD LLC
117105, Moscow, Varshavskoye shosse, 5, block 4, bld. 2
tel.: [phone]
fax: [phone]
Internet contacts:
http://en.lcard.ru
E-Mail:
Sales department: [e-mail]
Technical support: [e-mail]
E20-10 module © Copyright 2005-2017, L-Card LLC. All rights reserved.

Revision history of this document
Manual
revision
Date
Notes to the updates
1.00.02 –
1.00.07
05-2006 -
05-2007
Guidelines on E20-10 revision А release of which was
completed in late 2007.
2.00.01
04-2008
The manual is significantly amended, updated due to addition
of numerous details on E20-10 revision В.
2.00.02
04-2008
Table in p. 7.3 is updated, p. 3.3.4 is added, table 5-5 is
updated, error is corrected in table 6-3
2.00.03
09-2008
FPGA (p. 3.3.4) firmware upgrade details are updated.
2.00.04
10-2008
Explanatory figure is added in p. 4.4.
2.00.05
10-2008
FPGA (p. 3.3.4) firmware upgrade details are updated.
2.00.06
04-2009
E20-10 (p. 3.3.2)design versions designation system is
changed and amended
2.00.07
12-2009
Paragraph 6.5.4.3 has new version
2.00.08
06-2010
Paragraph updated 7.1.3
2.00.09
07-2010
Paragraph 6.3 edited
2.00.10
06-2011
P.5.2.2 edited. Paragraph 6.5.1 added
2.00.11
03-2012
Manor changes in documentation
2.00.12
09-2012
ADC frame is oversized up to 8192 samples!
Characteristic is added to Table 7.1 : Zero offset when ADC
input is unconnected
2.00.13
11-2012
Details are added to p. 3.3.4
2.00.14
02-2013
Details on revision B.01 are entered. (p. 2.1)
2.00.15
03-2013
Paragraph 2.1 edited
2.00.16
01-2014
Paragraph 6.5.1 edited
2.00.17
02-2014
table 6-7, p. 7.4, p. 6.5.1 are updated
2.00.18
12-2014
Details on new firmware 2.00.10, p. 3.3.4 are added
2.01.00
10-2017
Industrial design versions are added
The characteristics according to the results
preparation of L-CARD Voltage measuring converter series for
certification as Means of Measurement
The latest revision of this document is always being recorded on the CD-ROM included in
the delivery package (p.3.3). Besides, you can find the latest revision in the library of files on our
website http://en.lcard.ru/download.

E20-10 User Manual
Contents
1. What this document is about................................................................................................................ 6
1.1. On revisions А, Band В.01 of moduleE20-10........................................................................... 6
1.2. Designation system....................................................................................................................... 7
1.3. Design versions............................................................................................................................. 7
1.4. How to read this manual?............................................................................................................. 8
2. Primary application properties............................................................................................................. 9
2.1. Complete list of user differences of revisions А, В and B.01 for E20-10 module ................11
3. General description............................................................................................................................. 14
3.1. Device application...................................................................................................................... 14
3.2. Appearance ................................................................................................................................. 14
3.3. Module configuration................................................................................................................. 16
3.3.1. Standard supply package................................................................................................... 16
3.3.2. Design versions.................................................................................................................. 16
3.3.3. Software delivery............................................................................................................... 17
3.3.3.1. Operational software...................................................................................................... 17
3.3.3.2. Library Lusbapi.............................................................................................................. 17
3.3.3.3. LComp library................................................................................................................ 17
3.3.3.4. Optional software........................................................................................................... 18
3.3.4. FPGA firmware versions................................................................................................... 18
4. Installation and customization ........................................................................................................... 20
4.1. Module connecting to computer................................................................................................ 20
4.2. USB drivers installation............................................................................................................. 20
4.2.1. USB drivers installation from Lusbapi............................................................................. 20
4.2.2. USB drivers installation from LComp.............................................................................. 20
4.3. Recognition of the module......................................................................................................... 21
4.4. Differences in USB driver of Lusbapi library .......................................................................... 22
5. Overview of the hardware components and operation principles ................................................... 25
5.1. Block diagram............................................................................................................................. 25
5.2. E20-10 operating principle. ....................................................................................................... 28
5.2.1. Channel sampling principle............................................................................................... 29
5.2.2. Synchronization in E20-10................................................................................................ 30
5.2.2.1. Synchronization modes.................................................................................................. 32
5.2.3. Data format of E20-10....................................................................................................... 37
5.2.3.1. Coding of word size overloading sign E20-10 or revision А .....................................37
5.2.3.2. Coding of data continuous area start in E20-10 of revision B....................................37
5.2.4. FIFO buffer and its overloading elimination logic ..........................................................38
5.2.5. Readings adjustment (calibration) .................................................................................... 38
5.2.6. ADC word size overflow warning.................................................................................... 38
5.2.7. DAC optional ..................................................................................................................... 39
6. Connection of signals......................................................................................................................... 40
6.1. General Information................................................................................................................... 40
6.2. External connectors.................................................................................................................... 40
6.3. Analog signal connectors............................................................................................................. 1
6.3.1. Digital signal and external power connectors .................................................................. 43
6.4. Characteristics of signal line inputs and outputs...................................................................... 45
6.4.1. Operating mode.................................................................................................................. 45
6.4.2. Power-off mode.................................................................................................................. 46

6.4.3. Limiting through currents.................................................................................................. 47
6.4.4. External power supply input characteristic......................................................................47
6.4.5. External power supply outputs characteristic................................................................... 48
6.5. Specification and connection examples.................................................................................... 49
6.5.1. Connections to USB........................................................................................................... 49
6.5.2. Multimodule connections.................................................................................................. 50
6.5.3. Circuits GND, GND* and AGND .................................................................................... 51
6.5.4. ADC input connecting....................................................................................................... 52
6.5.4.1. Intrinsic input current of ADC analog input ................................................................52
6.5.4.2. Connecting to high-resistance output and alternate current output ............................52
6.5.4.3. On standard feeler oscillographic gauge connectivity................................................53
6.5.4.4. On effect of through currents on signal-to-noise ratio.................................................53
6.5.4.5. How can you find out that the through-currents degrade the signal-to-noise ratio in
your connection diagram?............................................................................................................. 54
6.5.4.6. How to solve the problem if the through currents are detected? ................................54
6.5.4.7. On disconnected ADC inputs........................................................................................ 54
6.5.1. Digital lines and synchronization lines connecting.......................................................... 54
7. Specifications...................................................................................................................................... 56
7.1. ADC............................................................................................................................................. 56
7.1.1. E20-10, E20-10-I, E20-10-D-I: limits of the permissible relative basic error of
measuring the ac voltage.................................................................................................................... 58
7.1.2. E20-10-1, E20-10-1-I, E20-10-D-1-I: limits of the permissible relative basic error of
measuring the ac voltage.................................................................................................................... 58
7.1.3. ADc synchronization system............................................................................................. 59
7.2. DAC............................................................................................................................................. 59
7.3. Digital lines................................................................................................................................. 60
7.4. Power........................................................................................................................................... 61
7.5. Physical properties ..................................................................................................................... 62
7.6. Operation conditions.................................................................................................................. 63
7.6.1. Normal conditions.............................................................................................................. 63
7.6.2. Operating conditions.......................................................................................................... 63
8. Problems solution under abnormal situations................................................................................... 64
8.1. How to be consulted................................................................................................................... 65
9. Bibliography........................................................................................................................................ 66
List of tables................................................................................................................................................ 67
List of figures. ............................................................................................................................................. 67