Here’s the equation used to get the analog value for a sample pair of inputs (0 and 1).
1
0
_
Input
Input
value
AI
−
=
RIO-4710x:
Analog Inputs 0-7 have a voltage range of 0-5VDC. They have 12bit ADC (a resolution of approximately
1.22mV) with a 100k input impedance.
Depending on the hardware configuration, the AQ command behaves differently. (Check the ID command to
see what style of RIO hardware is installed.)
AQ Differential
Pairs
AQ 0,1
Input 0 & Input 1
AQ 2,1
Input 2 & Input 3
AQ 4,1
Input 4 & Input 5
AQ 6,1
Input 6 & Input 7
Table 1: Differential Analog Input Channels on RIO-4710x
RIO-4712x:
The default resolution for the RIO-4712x is 12bit with a 16bit option. The part number is RIO-4712x-16 for
the 16 bit version.
Input Impedance:
Single Ended:
42k
Ω
Differential:
31k
Ω
Use the AQ command to specify the analog input range on the RIO-4712x.
AQ Input
Range
AQ 0,1
Set input 0 to have +/-5V input range
AQ 1,2
Set input 1 to have +/-10V input range
AQ 2,3
Set input 2 to have 0-5V input range
AQ 3,4
Set input 3 to have 0-10V input range
Table 2: Setting Input Ranges on RIO-4712x
On the RIO-4712x, the AQ command also allows the RIO to change the configuration from the default 8
single ended analog inputs to 4 differential analog inputs.
AQ Differential
Pairs
AQ 0,-1
Input 0 & Input 1 and +/-5V input range
AQ 2,-2
Input 2 & Input 3 and +/-10V input range
AQ 4,-3
Input 4 & Input 5 and 0-5V input range
AQ 6,-4
Input 6 & Input 7 and 0-10V input range
Table 3: Differential Analog Input Channels on RIO-4712x
RIO-472xx
The default resolution for the RIO-472xx is 12 bit with a 16 bit option. The part number is RIO-472xx-16 for
the 16 bit version.
Input Impedance (default 12 bit):
Single
Ended:
100k
Ω
46 Chapter 4 I/O
RIO-47xxx
Содержание RIO-47**0
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Страница 93: ...RIO Dimensions RIO 471xx Units in centimeters RIO 47xxx Appendix 87...
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