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DAQ USB Modules

The DAQ USB modules provides similar features as the analog input PCI cards, bringing more operative use than the PCI cards; they may be asserted especially in mobile or laboratory measurements.

All types of modules are intended for USB rev. 1.1 full speed, or USB rev. 2.0 full speed.

All-purpose mutlifunctional USB modules

Basic series USB modules (max. 40 kHz ADC)

Type AIN AIN
connect
ADC ADC
Buffer
DAC DAC
Buffer
CNT DIO
UDAQ-1408A 8x S.E. pluggable terminal block 14-bit
40kHz
1kB - - - - - - 2 2+1
UDAQ-1408E 8x S.E.
(isolated)
pluggable terminal block 14-bit
40kHz
1kB - - - - - - 2 2+1
UDAQ-1408CA 8x S.E. D-Sub 25 14-bit
40kHz
1kB - - - - - - 2 2+1
UDAQ-1408CE 8x S.E.
(isolated)
D-Sub 25 14-bit
40kHz
1kB - - - - - - 2 2+1
UDAQ-1416CA 16x S.E. D-Sub 25 14-bit
40kHz
1kB - - - - - - 2 2+1
UDAQ-1416CE 16x S.E.
(isolated)
D-Sub 25 14-bit
40kHz
1kB - - - - - - 2 2+1

Advanced series USB modules (max. 200 kHz ADC)

Type AIN AIN
connect
ADC ADC
Buffer
DAC DAC
Buffer
CNT DIO
UDAQ-1416AL 16x S.E. D-Sub 25 14-bit
200kHz
256kB - - - 256kB 2 4+1
UDAQ-1416AS 16x S.E. D-Sub 25 14-bit
200kHz
256kB 2x 12-bit
200kHz /
1MHz
256kB 2 4+1
UDAQ-1416DL 16x S.E./
8x DIF.
D-Sub 25 14-bit
200kHz
256kB - - - 256kB 2 4+1
UDAQ-1416DS 16x S.E./
8x DIF.
D-Sub 25 14-bit
200kHz
256kB 2x 12-bit
200kHz /
1MHz
256kB 2 4+1
UDAQ-1432AL 32x S.E. 2x D-Sub 25 14-bit
200kHz
256kB - - - 256kB 2 4+1
UDAQ-1432AS 32x S.E. 2x D-Sub 25 14-bit
200kHz
256kB 2x 12-bit
200kHz /
1MHz
256kB 2 4+1

Discontinued USB modules

Type AIN ADC ADC
Buffer
DAC DAC
Buffer
CNT DIO
UDAQ-1208
not available, replacement type UDAQ-1408A
8x S.E. 12-bit/
40kHz
1kB - - - - - - 2 2+1
UDAQ-1408
not available, replacement type UDAQ-1408A
8x S.E. 14-bit/
40kHz
1kB - - - - - - 2 2+1
UDAQ-1216AL
not available, replacement type UDAQ-1416AL
16x S.E. 12-bit
200kHz
256kB - - - - - - 2 4+1
UDAQ-1216AS
not available, replacement type UDAQ-1416AS
16x S.E. 12-bit
200kHz
256kB 2x12-bit
200kHz (stream)
1MHz (cyclic)
256kB 2 4+1

Several hints for the USB module selection

  1. For achieving maximal sampling frequency it is necessary to reserve enough PC performance and to disable all running applications that need lots of system resources. The stability of the transfer during the PC load is higher when the USB module provides larger data buffers.
    The basic UDAQ modules (e.g. UDAQ-1408A/E) provide small buffers. The maximum available sampling frequency depends on the used PC configuration.
    At the testing PC (Celeron 600MHz, 128MB RAM, Windows 98SE, no parallel applications running) the maximal sampling frequency of 40 kHz has been reduced to 20 kHz when being saved to HDD (data were sampled to RAM). When PC fitted with 2GHZ processor was used, there was no problem with saving data even with other applications saving to HDD simultaneously.
    The modules that provide the data buffers of hundreds of kB may handle the transfer dropouts of even hundreds of ms, so they can operate reliably at the highest sampling rates. The limiting parameters are not short-term transfer failures due to the operating system load, but the overall data throughput of the USB line. We have achieved the continuous data throughput of 400 kB/s (that means 200 kSamples/s) at the Pentium 4 at 2GHz, Windows XP with no applications running simultaneously.
  2. The modules that provide the D/A converters with the data buffer may generate the signals in the data stream mode (i.e. getting the signal data from the PC memory) or cyclic data mode (the module generates the signal from the data block saved in the module buffer; data are no longer transferred during the generation).
  3. The overall data throughput of the UDAQ modules with 2x 256 kB buffers allows the user to achieve continuous transfer rate more than 400kB/s; that means e.g. 200kSamples/s of measuring or 100 kSamples/s of measuring + 100 kSamples/s of generating.
  4. The power consumption of the UDAQ-1208/1408/1408x/1408Cx/1416Cx family (up to 160mA) satisfies direct connecting to the USB host adapter or active USB hub. The power consumption is too highr for connecting through the passive USB hub.
    Other modules are USB 2.0 compliant in all USB-powered device modes or are supplied with the power supply (i.e. self-powered device).