National Instruments BNC-208 Series, Руководство пользователя

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BNC-2080 Board Chapter 2
BNC-208X Series User Manual 2-22 © National Instruments Corporation
Example:
Using the values in Figure 2-13,
G =
10 k
1
(10 k
1
+ 10 k
1
+ 10 k
1
)
=
1
3
Therefore,
V
MIO
=
1
3
V
SC
When the MIO-16 is configured for
±
10-V inputs, the board can acquire
±
30-V signals with this
attenuator circuit.
If the use of thermocouples is required in your applications, using National Instruments SC-2070
board is better suited for the task. The SC-2070 board is equipped with an onboard temperature
sensor for use with thermocouple cold-junction compensation.
PC-LPM-16
The analog input section of an PC-LPM-16 data acquisition board consists of 16 ground-referenced
single-ended channels; therefore, the only valid configuration for the BNC-2080 is also RSE mode.
In this mode, all 16 analog input BNC connectors are used. Switches S1 through S4 and S6
through S9 must be in the SE position, and jumper W1 should be in the AIGND-COMMON
position, as shown in Figure 2-17 and Figure 2-18, respectively.
SE
DIFF
J3
ACH0
J9
ACH8
S2
Single-Ended Mode
Figure 2-17. Switch Configurations for SE Mode (PC-LPM-16)
Note
: All the switches are required to be in the same position; that is, S1 through S4 and S6
through S9 must all be in the SE position for use with the PC-LPM-16.