Figure 6. Connecting Floating Differential Signals to the NI USB-7846R
PGIA
ADC
AI+
NI USB-7846R
Connection
Accessory
AISENSE
AIGND
V
1
+
–
Overvoltage
Protection
AI–
Overvoltage
Protection
Overvoltage
Protection
Analog Output
The NI USB-7846R provides connections for eight analog output channels. Each channel has
an AO pin and AOGND pin to which you can connect a load.
Figure 7. Connecting a Load
NI USB-7846R
Connection
Accessory
AOGND
LOAD
AO
DAC
Digital I/O
The NI USB-7846R provides connections for 48 digital input/output (DIO) channels.
Connector 0 contains 32 high-speed DIO channels that can run up to 80 MHz signal
frequencies and Connector 1 contains 16 low-speed channels that can run up to 10 MHz signal
frequencies. Each connector has selectable logic levels that you can configure as 1.2 V, 1.5 V,
1.8 V, 2.5 V, or 3.3 V. You can configure each channel as input or output.
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ni.com
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NI USB-7846R User Manual
