PCI-6254 32-Channel 16-Bit Multifunction DAQ Device
Земля NI PCI-6254 is a high-density M Series multifunction data acquisition board for automated testing, multichannel voltage measurement and industrial monitoring. It provides 32 single-ended or 16 differential analog inputs.
With 16-bit resolution, a 1.25 MS/s maximum single-channel rate and a 1 MS/s multichannel aggregate rate, the PCI-6254 can acquire both static measurements and dynamic waveforms.
The board also provides 48 bidirectional digital I/O lines, including 32 hardware-timed lines, and two 32-bit counter/timers. It does not include analog outputs.
Key Features of the PCI-6254
- 32 single-ended or 16 differential analog inputs
- 16-bit analog input resolution
- 1.25 MS/s single-channel sampling
- 1 MS/s multichannel aggregate sampling
- Seven programmable input ranges
- 48 bidirectional digital I/O lines
- 32 hardware-timed digital lines
- Digital waveform rates up to 10 MHz
- Two 32-bit counter/timers
- Two 68-pin VHDCI connectors
- NI-DAQmx compatibility
PCI-6254 Technical Specifications
| Product Model | PCI-6254 |
|---|---|
| Part Number | 779071-01 |
| Шинный интерфейс | Conventional PCI |
| Analog Inputs | 32 single-ended or 16 differential |
| Разрешение | 16 bits |
| Single-Channel Rate | 1.25 MS/s maximum |
| Multichannel Rate | 1 MS/s aggregate maximum |
| Input Ranges | ±0.1 V, ±0.2 V, ±0.5 V, ±1 V, ±2 V, ±5 V and ±10 V |
| Analog Outputs | Ничего |
| Цифровой ввод-вывод | 48 bidirectional lines |
| Hardware-Timed DIO | 32 lines, up to 10 MHz |
| Counter/Timers | 2 × 32-bit |
| Front Connectors | 2 × 68-pin VHDCI |
| Driver | НИ-DAQmx |
PCI-6254 Part Number and Accessories
| Item | Part Number | Описание |
|---|---|---|
| PCI-6254 | 779071-01 | 32-channel PCI multifunction DAQ device |
| SHC68-68-EPM | 192061-02 | 2 m shielded VHDCI cable |
| SCB-68A | 782536-01 | Shielded 68-pin screw-terminal block |
| BNC-2110 | 777643-01 | BNC connector accessory |
| CB-68LP | 777145-01 | General-purpose screw-terminal connector block |
The PCI-6254 has two connectors. Accessing the complete channel set may require two cables and two terminal accessories. Verify Connector 0 and Connector 1 pin assignments before wiring.
High-Density Analog Input
Thirty-two single-ended channels allow the PCI-6254 to monitor many voltage signals from one board. Sixteen-channel differential operation is available when better common-mode noise rejection is required.
Fast Multiplexed Sampling
The PCI-6254 uses a multiplexed ADC. One channel can be sampled at up to 1.25 MS/s, while multichannel tasks share the 1 MS/s aggregate rate.
High-impedance sources may require longer settling intervals. External buffer amplifiers can improve performance when source impedance cannot be reduced.
48-Line Digital Subsystem
The digital subsystem provides 48 bidirectional lines. Port 0 contains 32 hardware-timed lines that can acquire or generate digital patterns at up to 10 MHz.
External drivers should be used for loads requiring higher voltage, current or isolation than the digital terminals provide.
Counter and Trigger Resources
Two 32-bit counters support encoder input, frequency measurement, edge counting and pulse generation. Analog and digital triggers allow repeatable synchronization with DUT or fixture events.
PCI-6254 Applications
- High-channel-count voltage acquisition
- Automated production testing
- Electronic subsystem validation
- Industrial process monitoring
- Sensor data logging
- Digital pattern acquisition
- Fixture and relay control
- Encoder and frequency measurement
Multichannel Test Systems
The PCI-6254 can measure multiple DUT test points while using its digital lines to monitor status signals or control external switching hardware.
Industrial Data Logging
Conditioned sensor outputs can be acquired and recorded over extended periods. Appropriate isolation and signal conditioning should be used for industrial signals.
PCI-6254 Installation Workflow
Step 1: Check the Host Computer
Verify that a compatible conventional PCI slot is available.
Step 2: Install NI-DAQmx
Confirm device, operating-system and application compatibility.
Step 3: Install the PCI Board
Power down the computer and install the PCI-6254 using ESD precautions.
Step 4: Connect Both Interfaces
Install the required cables and identify which signals belong to each VHDCI connector.
Step 5: Run NI MAX Diagnostics
Perform a self-test and verify representative channels on both connectors.
Step 6: Validate Timing and Grounding
Confirm sample-rate allocation, terminal mode, signal references and trigger configuration.
PCI-6254 Troubleshooting
Channels on Connector 1 do not work
Check the Connector 1 cable, terminal-block labels, pinout and physical channel configuration.
The measured channels show crosstalk
Reduce source impedance, lower the scan rate or add buffer amplifiers between the sources and DAQ inputs.
The required per-channel rate cannot be selected
The active channels share the 1 MS/s aggregate multichannel rate.
Digital waveforms do not run at the expected rate
Use Port 0 hardware-timed lines and confirm that the sample clock and NI-DAQmx buffer are configured correctly.
The board is not recognized
Verify PCI compatibility, board seating and NI-DAQmx support.
PCI-6254 Comparison
| Модель | AI | AO | DIO | Best Suited For |
|---|---|---|---|---|
| PCI-6250 | 16 | 0 | 24 | Lower-channel input-only systems |
| PCI-6254 | 32 | 0 | 48 | High-density input and digital I/O |
| PCIe-6259 | 32 | 4 | 48 | PCIe systems requiring analog output |
| PCIe-6353 | 32 | 4 | 48 | Newer X Series applications |
PCI-6254 vs PCIe-6259
The PCI-6254 uses conventional PCI and does not provide analog outputs. The PCIe-6259 uses PCI Express and adds four analog output channels.
Why Choose the PCI-6254?
Choose the PCI-6254 for legacy PCI systems requiring 32 fast analog inputs, extensive digital I/O and counter functionality without analog outputs.
PCI-6254 Frequently Asked Questions
How many inputs does the PCI-6254 have?
It provides 32 single-ended or 16 differential inputs.
Does it have analog outputs?
No. Consider the PCI-6259 or PCIe-6259 when four outputs are required.
Why does it have two connectors?
The dual connectors provide access to its larger analog and digital channel set.
What is the maximum sampling rate?
The maximum is 1.25 MS/s for one channel and 1 MS/s aggregate for multiple channels.
Which software controls it?
The PCI-6254 uses NI-DAQmx.
Recommended Related Products
- PCI-6250 Multifunction DAQ Device
- PCIe-6259 Multifunction DAQ Device
- PCIe-6353 X Series DAQ Device
- View More NI DAQ Products
Request a Quote for the PCI-6254
Contact us for availability and pricing for the NI PCI-6254 Multifunction DAQ Device. We can also help identify the required cables, connector blocks and compatible replacement hardware.
