Boards Home > ISA Bus Data Acquisition Boards-ISO-DA8/DA16
Isolatde strain gauge type Load Cell input board
» Features
■ 2500VDC photo-isolation protection
■ 8/16-channel, 14-bit analog output
■ Unipolar or bipolar outputs available from
each converter
■ Voltage/Current output from each converter
■ Output type and output range can be software
programmable
■ 4~20 mA or 0~20 mA current sink to ground from
each converter
■ Double-buffered D/A latches
■ Command set programming
■ Software Calibration
■ 16-channel DI, 16-channel DO
» Functional Description
The ISO-DA8/16 is a bus isolated 14-bit D/A card for PC/AT compatible computers.
The optical isolation of the ISO-DA8/16 can operate with up to 2500Vrms of common-mode.
The ISO-DA8/16 offers 8/16 channel double-buffered analog outputs.
The output range can be configured in different ranges : ±10V,±5V, 0~10V, 0~5V voltage output or 4 to 20 mA or 0 to 20 mA sinkcurrent.
The innovative design improve several drawbacks of the conventional isolated D/A card. For example :
1. Jumperless and trimless
2. The power-on value of analog output can be pre-defined by the user and stored in the on-board EEPROM
3. The calibration is performed under software control, thus eliminating manual trim-pot adjustments.
The calibration data is stored in EEPROM. Easy recalibration ensures the accuracy of the board
4. Every channel can be selected as voltage or current output
5. High channel count output can be implemented in half size.
» Applications
● Programmable voltage source
● Programmable current sink
● Harsh environment operation
● Process control
» Specifications Analog Output
● D/A converter : Quad 14-bit MDAC
● Channels : 8/16 independent
● Resolution : 14-bit
● Type : double-buffered, multiplying
● Integral linearity : 0.006% FSR (typical)
● Differential linearity : 0.006% FSR (typical) Voltage Output Range
● Unipolar : 0~5V or 0~10V
● Bipolar : ±10V or ±5V
● Current drive : ±5 mA
● Absolute accuracy : 0.01% FSR (typical)
● Power on state : programmable Current Output Range
● 0~20 mA or 4~20 mA
● Absolute Accuracy : 0.1% FSR (typical)
● Excitation voltage range : + 7V ~ +40V
● Power on state : programmable Digital I/O
● 16 TTL-level input
● Input low VIL = 0.8V max; IIL =-0.4 mA max
● Input high VIH = 2.0V min; IIH = 20μA max
● 16 TTL-level output
● Output low VOL = 0.5V max; @IOL =8 mA max
● Output high VOH = 2.7V min; @IOH =0.4 mA max Stability
● Offset temperature coefficient : ±50μV/°C
● Gain temperature coefficient : ±10ppm/°C General Specifications
● I/O connector : one 37-pin D-Sub female
two 20-pin ribbon male
● Power requirements : ISO-DA8 : +5VDC @ 800 mA max
ISO-DA16 : +5VDC @ 1400 mA max
● Operating temperature : 0°C ~ 60°C
● Operating humidity : 0% ~ 90% non-condensing
● Storage temperature : -20°C ~ 70°C
● Dimensions : 182 mm x 122 mm
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DA8 PIN View){kind=small}
DA16 PIN View
