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National Instruments PXIe-4466 Getting Started Manual Download Page 15

Figure 8. 

PXIe-446x Analog Output Block Diagram

1.0 

Ω

Output

Configuration

Relay

Output Enable

Relay

Differential

Amplifier

Attenuator

Gain =     0 dB
Gain = –10 dB
Gain = –20 dB
Gain = –30 dB

Low-Pass

Filter

Differential

DAC

5.2 k

Ω

5.2 k

Ω

50 

Ω

1.0 

Ω

+AOn

–AOn

Output Configuration Relay

Differential

OFF

ON

Pseudodifferential

BNC Connector

Mini-XLR Connector

–AOn

+AOn

–AOn

+AOn

–AOn

1

2

3

+AOn

–AOn

+AOn

Common-

Mode DAC

19.0 

Ω

19.0 

Ω

280 

Ω

280 

Ω

40/600 

Ω

 Termination

Selection Relay

The PXIe-446x output stage is a differential amplifier. The output stage can be

configured to pseudodifferential mode in software, where the -AO terminal is

internally connected to chassis ground through a 50 Ω resistor. This connection

introduces a gain difference in the output stage of -22.0 mdB, for which the software

corrects automatically. Refer to the NI-DAQmx Help for more information about

terminal configuration.

The PXIe-446x output stage can also be configured to pseudodifferential mode

by making an external connection bAOn or -AOn to chassis ground. This

connection introduces a gain change in the output stage of -22.0 mdB, for which the

software does not correct.

For most applications, configuring the PXIe-446x output stage in differential mode

will yield the best performance. For improved common-mode noise rejection, it

is highly recommended to make a connection between the chassis ground of the

PXIe-446x and the input device ground. This connection is critical when the input

device is isolated; if this connection is not available, it may be better to configure the

PXIe-446x output stage in pseudodifferential mode.

The following figures show the recommended output connections for both

connector types.

© National Instruments

15

PXIe-4466/4467/4468 Getting Started Guide

Summary of Contents for PXIe-4466

Page 1: ...PXIe 4466 4467 4468 Getting Started Guide 2023 03 28 ...

Page 2: ...Contents Getting Started Guide 3 ni com 2 PXIe 4466 4467 4468 Getting Started Guide ...

Page 3: ...on specific download page Note Before you begin install and configure your chassis and controller Unpacking the Kit The PXIe 446x ships in an antistatic package to prevent electrostatic discharge from damaging device components To prevent such damage when handling the device ground yourself using a grounding strap or by holding a grounded object such as your computer chassis and complete the follo...

Page 4: ...following additional items not included in the module kit are necessary to operate the PXIe 446x PXI Express chassis with controller or MXI Express card or built in optional LabVIEW Note For the list of LabVIEW versions supported by a specific version of NI DAQmx refer to the NI DAQmx Readme available on the version specific download page at ni com downloads Preparing the Environment Refer to the ...

Page 5: ... Driver support for the modules was first available in the following NI DAQmx versions PXIe 4466 NI DAQmx 20 7 PXIe 4467 NI DAQmx 21 3 PXIe 4468 NI DAQmx 22 8 3 Follow the instructions in the installation prompts Note Windows users may see access and security messages during installation Accept the prompts to complete the installation 4 When the installer completes select Restart in the dialog box...

Page 6: ... the module 2 Power off the chassis 3 Inspect the slot pins on the chassis backplane for any bends or damage prior to installation Do not install a module if the backplane is damaged 4 Remove the black plastic covers from all the captive screws on the module front panel 5 Identify a supported slot in the chassis The following figure shows the symbols that indicate the slot types Figure 1 Chassis C...

Page 7: ... Hardware Module 3 Ejector Handle in Downward Unlatched Position 9 Latch the module in place by pulling up on the ejector handle 10 Secure the module front panel to the chassis using the front panel mounting screws Note Tightening the top and bottom mounting screws increases mechanical stability and also electrically connects the front panel to the chassis which can improve the signal quality and ...

Page 8: ... chassis 3 Expand your Chassis tree item MAX lists all modules installed in the chassis Your default names may vary Note If you do not see your module listed press F5 to refresh the list of installed modules If the module is still not listed power off the system ensure the module is correctly installed and restart 4 Record the identifier MAX assigns to the hardware Use this identifier when program...

Page 9: ...protection Figure 3 PXIe 4466 4467 Front Panel DSA Analog I O ACC ACTIVE PXIe 4467 AI 0 AI 1 AO 0 AO 1 PFI 0 3 2 4 1 2 2 5 6 2 2 DSA Analog I O ACC ACTIVE PXIe 4466 AI 0 AI 1 AO 0 AO 1 PFI 0 3 2 4 1 2 2 5 6 2 2 1 PFI 2 Chassis Ground 3 AI 4 AI 5 AO 6 AO National Instruments 9 PXIe 4466 4467 4468 Getting Started Guide ...

Page 10: ...og I O ACC ACTIVE PXIe 4468 AI 0 AI 1 AO 0 AO 1 PFI 0 3 2 3 4 4 1 2 1 2 5 6 2 5 6 2 2 1 PFI 2 Chassis Ground 3 AI 4 AI 5 AO 6 AO Table 1 Signal Descriptions Signal Name Signal Description AI Positive analog input signal AI Negative analog input signal ni com 10 PXIe 4466 4467 4468 Getting Started Guide ...

Page 11: ...r 75 ms when the module is accessed GREEN The module is ready to be programmed ACTIVE OFF Module is not acquiring or preparing to acquire data AMBER Module is waiting for a trigger event to start an acquisition GREEN An acquisition has been triggered and the module is currently acquiring data AMBER GREEN alternating The module is changing reference clock timebase RED solid An error has been detect...

Page 12: ...oper voltage A clocking error occurred PLL fell out of lock or PXIe_CLK100 was not present when using the external timebase An external overvoltage or overcurrent was detected 1 An overload was detected A streaming underflow was detected on the channel Internal hardware failed either due to software or hardware failure AO 0 1 AMBER GREEN alternating The reference clock source is changing to onboar...

Page 13: ...underflow was detected on the channel Internal hardware failed either due to software or hardware failure Analog Input Connections The following figure shows the PXIe 446x input connection with the terminal configuration in differential mode Refer to the NI DAQmx Help for more information about terminal configuration Figure 5 PXIe 446x Input Connection in Differential Mode DUT AI 210pF 1 MΩ 210 pF...

Page 14: ...upling 900 kΩ 900 kΩ 100 kΩ 100 kΩ 20 dB Attenuator AIGND Differential Amplifier Analog Lowpass Filter Gain 0 dB Gain 10 dB Gain 20 dB Gain 30 dB Gain 0 dB Gain 20 dB IEPE On Off 24 V Compliant IEPE Constant Current Source 4 10 20 mA ADC AI AI AI AI AI AI Mini XLR Connections BNC Connections AI AI Refer to inset for connection by connector type Analog Output Connections The following figure shows ...

Page 15: ...ware corrects automatically Refer to the NI DAQmx Help for more information about terminal configuration The PXIe 446x output stage can also be configured to pseudodifferential mode by making an external connection between AOn or AOn to chassis ground This connection introduces a gain change in the output stage of 22 0 mdB for which the software does not correct For most applications configuring t...

Page 16: ...eBase for additional information our technical support engineers create as they answer common user questions and resolve unexpected issues What Should I Do if the PXIe 446x Does Not Appear in MAX 1 In the MAX configuration tree expand Devices and Interfaces 2 Expand the Chassis tree to see the list of installed hardware and press F5 to refresh the list 3 If the module is still not listed power off...

Page 17: ...are module or the LED Notice Apply external signals only while the PXIe 446x is powered on Applying external signals while the module is powered off may cause damage 1 Disconnect any signals from the module front panels 2 Power off the chassis 3 Remove the module from the chassis and inspect it for damage Do not reinstall a damaged module 4 Install the module in a different chassis slot from which...

Page 18: ...in 3 Power off the chassis 4 Reinstall the failed module in a different slot 5 Power on the chassis 6 Perform the self test again 1 An external overvoltage overcurrent or overload error can be read through NI DAQmx property nodes ni com 18 PXIe 4466 4467 4468 Getting Started Guide 2023 National Instruments Corporation ...

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