Справочник Пользователя для National Instruments NI PCI-6110

 

Figure 3-2.  NI PCI-6111 Block Diagram

The AI section for the NI PCI-6110/6111 is software configurable. You can 
select different AI configurations through application software. The 
following sections describe in detail each AI setting.

The NI PCI-6110/6111 supports only differential (DIFF) inputs. DIFF 
input mode provides up to four channels on the NI PCI-6110 and up to 
two channels on the NI PCI-6111.

The inputs are differential only in the sense that the ground loops are broken. The 

negative input is not intended to carry signals of interest, rather it provides a DC reference 
point for the positive input, which may be different than ground.

A channel configured in DIFF input mode uses two AI channel lines. 
One line connects to the positive input of the device programmable gain 
instrumentation amplifier (PGIA), and the other connects to the negative 

Timing

PFI / Trigger

I/O Connector

RTSI Bus

Digital I/O (8)

EEPROM

+

CH0
Amplifier
–

Calibration

Mux

AI CH0

Mux

CH0

Latch

Analog
Trigger

Circuitry

2

Trigger Level

DACs

Trigger

12

4

Calibration

DACs

DAC0

DAC1

CH0
12-Bit ADC

Data (32)

Data (32)

Generic

Bus

Interface

PCI
Bus

Interface

IRQ
DMA

AO Control

CH0+

CH0-

+

CH1
Amplifier
–

AI CH1

Mux

CH1

Latch

12

CH1
12-Bit ADC

CH1+

CH1-

AI Control

Data (16)

Data (16)

ADC

FIFO

DAC

FIFO

Address/Data

Control

PCI Bus

Analog

Input

Control

EEPROM

Control

DMA

Interface

DAQ-STC

Bus

Interface

Analog
Output
Control

I/O

Bus

Interface

Analog Input

Timing/Control

Analog Output

Timing/Control

Digital I/O

Trigger

Counter/

Timing I/O

RTSI Bus

Interface

DMA/IRQ

Bus

Interface