BNC-2081 Board
Chapter 3
BNC-208X Series User Manual
3-12
© National Instruments Corporation
AIGND
(Case)
Channel 1
(Center)
BNC Connector
R4
R5
R6
R14
8.2-k
Ω
Resistor
Channel 1
(Center)
To
Input
Multiplexer
Input Schematic for
ACH1
BNC Connector
0.001-
µ
F Capacitor
+
AIGND
A
B
C
D
C
R6 = 0.001
µ
F
(Capacitor)
D
R14 = 8.2 k
Ω
ACH1
AIGND
(Case)
Figure 3-10. Highpass Filter on Channel 1
Building Attenuators (Voltage Dividers)
Attenuators can be connected to the analog inputs of the BNC-2081 board. Attenuators can be used to
reduce a signal that is outside the normal input range of the data acquisition board (
±
10 V maximum).
Warning
:
The BNC-2081 board is not designed for any input voltages greater than 42 V, even if a
user-installed voltage divider reduces the voltage to within the input range of the data
acquisition board. Input voltages greater than 42 V can result in damage to the
BNC-2081 board, any and all boards connected to it, and the host computer. Overvoltage
can also cause an electric shock hazard for the operator. National Instruments is
not
liable
for damage or injury resulting from such misuse.
