USB-2416 User's Guide
Functional Details
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Figure 5. 16-channel differential mode pinout
Differential connection guidelines
When connecting differential voltage inputs to a floating voltage source, make sure there is a DC return path
from each voltage input to ground. You make this path by connecting a resistor from each input to a GND pin.
A value of approximately 100
kΩ can be used for most applications.
Leave unused input channels either floating or tied to GND.
Source impedances should be kept as small as possible to avoid settling time and accuracy errors.
When configuring thermocouple sensors, keep any stray capacitance as small as possible relative to GND to
avoid settling time and accuracy errors. For thermocouple channels, do not provide a return path to ground. This
is done internally.
