Adlink ACL-8112 Series Manuel d'utilisateur Page 34

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26 Signal Connections
AIHn
AILn
n = 0, ..., 8
Groun
Signal
Sourc
To A/D Converter
VG1 VG2
Vcm = VG1 - VG2
GND
+
-
Figure 3.5 Ground source and differential input
A differential mode must be used when the signal source is differential. A
differential source means the ends of the signal are not grounded. To avoid
dangerously high voltages between the local ground of the signal and the
ground of the PC system, a shorted ground path must be connected.
Figure 3.6 shows the connection for a differential source.
AIHn
AILn
n = 0, ..., 8
Differentia
Signal
Sourc
To A/D Converter
VG1 VG2
Vcm = VG1 - VG2
GND
+
-
Figure 3.6 Differential source and differential input
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