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PCI-1202/1602/180x Series Card
Multi-Function Boards
Figure 2.4-3: Single-ended input with floating signal source
A/D CH0
A/D CH1
A/D CH n
AGND
Figure 2.4-4: Differential input with floating thermocouple signal
A/D CH 0 HI
A/D CH 0 LO
A/D CH n HI
A/D CH n LO
A. GND
CAUTION:
In Figure 2.4-4, the maximum common mode voltage between the analog input source and the
AGND is 70 V
. Make sure that the input signal is under specification first! If the common mode voltage is
p-p
over 70 V
, the input multiplexer will be permanently damaged.
p-p
Do not join LO to A.GND at the computer
User Manual/ Ver. 4.8/ Mar. 2015/ PMH-0014-48/ Page: 26
Es
Note: If the input signal is
not thermocouple, the user
should use an oscilloscope to
measure common mode
voltage of Vin before
connecting to PEX-1202 and
PCI-1202/1602/1800/1802
series card. Don't use a
voltage meter or
multi-meter.
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