PEX/PIO/PISO-DA Series Card
Analog Output Boards
User Manual/ Ver. 3.1/ Oct. 2013/ PMH-0010-31/ Page: 29
2.6.6
0~20 mA Current Output
The current output for PEX-DA and PISO/PIO-DAxU series cards is always in the range of
0~22 mA. If the user needs to output a current in the range of 0~20 mA, the software
calibration is the same as that described in
. Iout will be in the range of 0~20 mA, so
the DaValue will approximately be from 0x1fff to 0x3fff, which means that the resolution is
about 13 bits.
2.6.7
4~20 mA Current Output
The current output for PEX-DA and PISO/PIO-DAxU series cards is always in the range of
0~22 mA. If the user needs to output a current in the range of 4~20 mA, the software
calibration is the same as that described in
. Iout will be in the range of 4~20 mA, so
the DaValue will approximately be from 0x2600 to 0x3fff, which means that the resolution is
about 13 bits.
2.6.8
No VR and No Jumper Design
In a conventional 12-bit D/A board, for example the A-626/A-628, there are many jumpers
that allow the following functions to be performed:
(1)
Selecting the reference voltage (internal -10/-5/or external)
(2)
Selecting unipolar/bipolar (0-10 V or
10 V)
(3)
Selecting different output ranges (0-10 V or 0-5 V)
There are also many VRs that allow the following functions to be performed:
(1)
Adjustment of the output voltage offset
(2)
Full-scale adjustment of the output voltage
(3)
Adjustment of the output current offset
(4)
Full-scale adjustment of the output current
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