PXI-6115 Simultaneous-Sampling Multifunction DAQ Module
Земля ПХИ-6115 высокоскоростной PXI multifunction I/O module designed for simultaneous analog acquisition, waveform generation, digital I/O and counter/timer measurements. It provides four 12-bit analog input channels with simultaneous sampling at up to 10 MS/s per channel.
In addition to high-speed analog acquisition, the PXI-6115 includes two 12-bit analog outputs, eight digital I/O lines and two 24-bit counter/timers. This combination makes it suitable for synchronized stimulus-response testing, transient signal capture, automotive electronics, radar, sonar and ultrasonic measurement systems.
PXI-6115 Product Overview
The PXI-6115 belongs to the NI S Series simultaneous-sampling DAQ family. Unlike multiplexed data acquisition devices that use a single ADC for multiple channels, the module provides a dedicated analog-to-digital converter for each input channel.
This architecture allows all four channels to capture samples at the same instant, reducing channel-to-channel timing errors when measuring phase relationships, transient events and correlated signals.
The module supports programmable input ranges from ±200 mV to ±42 V, AC or DC input coupling and software-selectable analog filters. Deep onboard input and output memory supports longer high-speed acquisitions and waveform-generation operations.
Key Features of the PXI-6115
Four Simultaneously Sampled Analog Inputs
The PXI-6115 provides four pseudodifferential analog input channels. Each channel uses its own 12-bit ADC and can sample at up to 10 MS/s, allowing all four signals to be acquired simultaneously without multiplexing delay.
Wide Programmable Input Ranges
Available bipolar input ranges include:
- ±200 mV
- ±500 mV
- ±1 V
- ±2 V
- ±5 V
- ±10 V
- ±20 V
- ±42 V
The extended ±20 V and ±42 V ranges are useful for protected secondary circuits and automotive electronic systems. The module is rated for Measurement Category I signals and must not be connected directly to CAT II, CAT III or CAT IV power-distribution circuits.
Software-Selectable Analog Filters
The analog input circuitry includes software-enabled three-pole Bessel filters with 50 kHz and 500 kHz cutoff frequencies. These filters can reduce out-of-band noise and aliasing when measuring lower-frequency signals.
Two High-Speed Analog Outputs
The PXI-6115 includes two 12-bit voltage output channels with a fixed ±10 V range. One channel can update at up to 4 MS/s, while both channels can operate at up to 2.5 MS/s per channel under supported system conditions.
The analog outputs can generate stimulus signals, test waveforms and control voltages while the analog input channels simultaneously record the response of the device under test.
Eight Digital I/O Lines
Eight TTL/CMOS-compatible digital I/O lines support device control, state monitoring and digital handshaking. The digital subsystem supports transfers up to 10 Mwords/s, with each word containing eight bits.
Two Counter/Timers
The module provides two 24-bit up/down counter/timers with a maximum source frequency of 20 MHz. They support applications such as event counting, pulse-width measurement, frequency measurement and pulse generation.
Analog and Digital Triggering
The PXI-6115 supports analog triggering from an analog input channel or an external trigger signal. Digital triggering supports rising- or falling-edge operation, while the PXI trigger bus and star trigger provide synchronization with other instruments in the chassis.
PXI-6115 Technical Specifications
| Product Model | ПХИ-6115 |
|---|---|
| NI Part Number | 778204-01 |
| Product Type | PXI Simultaneous-Sampling Multifunction I/O Module |
| Analog Input Channels | 4 pseudodifferential |
| Analog Input Resolution | 12 bits |
| Maximum Sample Rate | 10 MS/s per channel |
| Minimum Sample Rate | 20 kS/s |
| Simultaneous Sampling | Да |
| Input Ranges | ±0.2 V, ±0.5 V, ±1 V, ±2 V, ±5 V, ±10 V, ±20 V and ±42 V |
| Input Coupling | AC or DC, individually configurable |
| Analog Filters | 50 kHz and 500 kHz, 3-pole Bessel |
| Input Buffer | 16 MS or 32 MS |
| Analog Output Channels | 2 voltage outputs |
| Analog Output Resolution | 12 bits |
| Analog Output Range | ±10 V |
| Maximum AO Update Rate | 4 MS/s for one channel; 2.5 MS/s per channel with two channels |
| Output Buffer | 16 MS or 32 MS |
| Цифровой ввод-вывод | 8 TTL/CMOS-compatible lines |
| Digital Transfer Rate | Up to 10 Mwords/s |
| Counter/Timers | 2 × 24-bit |
| Maximum Counter Source Frequency | 20 MHz |
| Запуск | Analog and digital triggering |
| PXI Synchronization | PXI trigger bus and PXI star trigger |
| I/O Connector | 68-pin male SCSI-II type |
| Operating Temperature | 0°C to 50°C |
| Recommended Warm-Up Time | 15 minutes |
| Recommended Calibration Interval | 1 year |
| Software Driver | НИ-DAQmx |
| Lifecycle Status | Limited Support / No longer available from NI |
How the PXI-6115 Works
Each analog input channel has an independent ADC and signal-conditioning path. When a sample clock occurs, all four ADCs capture their respective signals at the same time. The resulting data is transferred to onboard memory or the host controller through DMA.
The analog output subsystem can generate voltage waveforms while the inputs measure the resulting response. Digital I/O and counter/timer resources can coordinate relays, sensors, actuators and external test equipment within the same application.
This integrated architecture is especially useful for closed-loop and stimulus-response tests that require precise timing among acquisition, generation and digital control.
Simultaneous Sampling Advantages
Simultaneous sampling is important when the timing relationship between channels must be preserved. Common examples include phase measurements, vibration analysis, transient capture and multichannel waveform comparison.
Because the PXI-6115 does not introduce multiplexing delay between its four analog inputs, engineers can compare signals using a common sample clock and consistent channel timing.
Типичные применения
- Stimulus-response testing
- High-speed transient signal capture
- Automotive electronic system testing
- Radar and sonar measurements
- Ultrasonic signal acquisition
- Phase and timing analysis
- Power electronics validation on protected secondary circuits
- Closed-loop control experiments
- Electronic component characterization
- Automated production testing
- Research and laboratory measurement systems
Software and System Integration
The PXI-6115 is supported through the NI-DAQmx driver. Applications can be developed using compatible versions of LabVIEW, LabWindows/CVI, C/C++, .NET and other environments that support NI-DAQmx.
NI Measurement & Automation Explorer can be used to identify the module, configure channels, run test panels and perform basic troubleshooting before integrating it into an automated application.
A complete measurement system typically requires:
- A compatible PXI or hybrid PXI Express chassis
- A PXI embedded controller or remote-control interface
- A compatible NI-DAQmx driver version
- A 68-pin shielded cable
- A compatible terminal block or custom interface fixture
- Appropriate signal conditioning for the connected sensors
Cable and Terminal Block Selection
The PXI-6115 uses a 68-pin male SCSI-II type I/O connector. Suitable accessories may include shielded 68-pin cables and terminal blocks such as the SCB-68 family.
Before ordering an accessory, verify the connector type, cable pinout, shielding requirements and compatibility with the PXI-6115. Accessories intended for 68-pin VHDCI devices are not automatically compatible with its SCSI-style connector.
PXI-6115 Troubleshooting
Module Is Not Detected
Confirm that the module is fully seated in a compatible PXI slot. Check NI Measurement & Automation Explorer and verify that the installed NI-DAQmx version supports the PXI-6115 and the host operating system.
Input Data Appears Clipped
Select an input range that is larger than the expected signal amplitude. Also confirm that the positive and negative input terminals remain within their documented working-voltage limits.
Channels Show Unexpected Phase Differences
Verify that all channels belong to the same hardware-timed acquisition task and use the same sample clock. Cable length and external signal-conditioning delays should also be considered.
Measurements Contain Excessive Noise
Use shielded cables, correct grounding and the smallest practical input range. The 50 kHz or 500 kHz analog filter may help when the required signal bandwidth permits it.
Analog Output Rate Is Lower Than Expected
The maximum update rate depends on the number of active output channels. A single channel supports up to 4 MS/s, while two simultaneously active channels support up to 2.5 MS/s per channel.
PXI-6115 vs PXI-6120
Земля PXI-6120 provides the same basic four-input simultaneous-sampling architecture but increases analog input and output resolution to 16 bits. Its maximum analog input sample rate is 800 kS/s per channel.
The PXI-6115 is better suited to applications that prioritize acquisition speed, while the PXI-6120 is more appropriate when higher resolution is more important than maximum sampling rate.
| Спецификация | ПХИ-6115 | PXI-6120 |
|---|---|---|
| Analog Inputs | 4 | 4 |
| AI Resolution | 12 bits | 16 bits |
| Maximum AI Rate | 10 MS/s per channel | 800 kS/s per channel |
| Analog Outputs | 2 | 2 |
| AO Resolution | 12 bits | 16 bits |
| Цифровой ввод-вывод | 8 | 8 |
PXI-6115 Replacement
NI identifies the PXIe-6386 as the recommended replacement for the PXI-6115. The PXIe-6386 provides eight simultaneously sampled 16-bit analog inputs at up to 14 MS/s per channel, two analog outputs and 24 digital I/O lines.
The PXIe-6386 is not necessarily a drop-in replacement. Engineers should verify chassis compatibility, connector and cable requirements, software support, terminal accessories and application timing before migration.
Recommended Related Products
- PXIe-6386 Multifunction I/O Module – NI-recommended replacement with eight 16-bit, 14 MS/s simultaneous analog inputs.
- PXI-6120 Simultaneous-Sampling DAQ Module – Four-channel, 16-bit alternative for applications requiring higher measurement resolution.
- PXI-6133 Simultaneous-Sampling DAQ Module – Higher-channel-count S Series option for synchronized acquisition.
- PXI-6143 Simultaneous-Sampling DAQ Module – Simultaneous analog input module for multichannel measurement systems.
- PXI-6251 Multifunction DAQ Module – General-purpose multifunction I/O option for applications that do not require simultaneous sampling.
How to Select the Right DAQ Module
Choose the PXI-6115 when maintaining an existing system that requires four simultaneously sampled channels, 10 MS/s acquisition, extended ±42 V input ranges and integrated analog output.
Consider another model when:
- More than four analog input channels are required
- Measurement resolution above 12 bits is necessary
- A currently supported module is required for a new system
- The system uses only PXI Express peripheral slots
- Different connector or terminal accessories are preferred
- More digital I/O channels are needed
Frequently Asked Questions
What is the PXI-6115 used for?
The PXI-6115 is used for simultaneous high-speed acquisition, waveform generation and synchronized multifunction testing. Typical applications include automotive electronics, radar, sonar, ultrasound and stimulus-response testing.
How many analog input channels does it provide?
The module provides four pseudodifferential analog input channels with independent ADCs.
What is the maximum sample rate?
Each analog input channel can sample at up to 10 MS/s, with all four channels operating simultaneously.
Does the PXI-6115 provide analog outputs?
Yes. It provides two 12-bit, ±10 V analog outputs. One channel supports up to 4 MS/s, while two channels support up to 2.5 MS/s per channel.
Can the PXI-6115 measure ±42 V signals?
Yes, the module includes a ±42 V input range. The measurement must remain within the documented channel and Measurement Category I limits.
Which connector does the PXI-6115 use?
It uses a 68-pin male SCSI-II type I/O connector.
Does it support hardware triggering?
Yes. The module supports analog triggering, digital triggering, PXI trigger bus lines and the PXI star trigger.
What is the part number for the PXI-6115?
The standard NI part number is 778204-01.
Is the PXI-6115 still available from NI?
No. NI lists the PXI-6115 as no longer available with Limited Support status. Availability is generally limited to existing inventory and secondary-market units.
What is the recommended replacement?
NI recommends the PXIe-6386. Compatibility should be reviewed because it uses a newer PXI Express architecture and has different specifications and integration requirements.
Request a Quote for the PXI-6115
Contact us for current availability, condition, lead time and project pricing for the PXI-6115 Simultaneous-Sampling Multifunction DAQ Module. We can also help identify compatible cables, terminal blocks, PXI chassis and replacement modules for your measurement system.
