National Instruments PCIe-7858, Руководство пользователя, Страница: 6 / 9

Figure 5. Connecting Floating Differential Signals to the PCIe-7858
1 M Ω
Resistor
1 M
Ω
Resistor
1 M Ω
Resistor
1 M
Ω
Resistor
V
1
+
– PGIA ADC
AI+
NI PCIe-7858
Connection
Accessory
AISENSE
AIGND
Overvoltage
Protection
AI–
Overvoltage
Protection
Overvoltage
Protection
Analog Output
The PCIe-7858 provides connections for eight analog output channels. Each channel has an
AO pin and AOGND pin to which you can connect a load.
Figure 6. Connecting a Load
NI PCIe-7858
Connection
Accessory
AOGND
LOAD
AO
DAC
Digital I/O
The NI PCIe-7858 provides connections for 48 digital input/output (DIO) channels. Connector
0 contains 16 low-speed channels that can run up to 10 MHz signal frequencies. Connector 1
contains 32 high-speed DIO channels that can run up to 80 MHz signal frequencies and
support external clock source. 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.
NI PCIe-7858 User Manual | © National Instruments | 5