PCIe-6345 80-Channel Multifunction DAQ Device
The NI PCIe-6345 is a high-channel-count X Series PCI Express multifunction DAQ device. It provides 80 single-ended or 40 differential analog inputs, two analog outputs, 24 digital I/O lines and four 32-bit counters.
The analog input subsystem offers 16-bit resolution and a 500 kS/s aggregate sampling rate. Its two analog outputs operate at up to 2.86 MS/s, allowing the same device to perform both measurement and stimulus generation.
Key Features of the PCIe-6345
- 80 single-ended or 40 differential analog inputs
- 16-bit, 500 kS/s analog input
- Two analog outputs at up to 2.86 MS/s
- 24 bidirectional digital I/O lines
- Four 32-bit counters/timers
- Seven programmable bipolar input ranges
- NI-STC3 timing technology
- PCI Express interface
- NI-DAQmx support
PCIe-6345 Technical Specifications
| Product Model | PCIe-6345 |
|---|---|
| Part Number | 790686-01 |
| Analog Inputs | 80 single-ended or 40 differential |
| AI Resolution | 16 bits |
| Maximum AI Rate | 500 kS/s aggregate |
| Input Ranges | ±0.1 V, ±0.2 V, ±0.5 V, ±1 V, ±2 V, ±5 V and ±10 V |
| AI FIFO | 4,095 samples |
| Analog Outputs | 2 |
| Maximum AO Rate | 2.86 MS/s |
| Digital I/O | 24 bidirectional lines |
| Counters | Four 32-bit counters |
| Sampling Architecture | Multiplexed |
| Timing Technology | NI-STC3 |
| Host Interface | PCI Express |
| Connection System | Multiple 68-pin VHDCI connector groups |
| Driver | NI-DAQmx |
PCIe-6345 Part Number and Accessories
| Item | Part Number | Description |
|---|---|---|
| PCIe-6345 | 790686-01 | 80 AI multifunction DAQ device |
| SHC68-68-EPM | 192061-02 | 2 m shielded multifunction cable |
| SCB-68A | 782536-01 | Shielded screw-terminal block |
| BNC-2110 | 777643-01 | Shielded BNC connector block |
| BNC-2115 | 777807-01 | BNC accessory for extended I/O connectors |
The PCIe-6345 uses multiple connector groups. Confirm the number of cables and terminal blocks required to access all 80 analog inputs.
High-Channel-Count Acquisition
The 80 single-ended inputs make the PCIe-6345 suitable for test fixtures and monitoring systems containing many voltage signals. Differential configuration provides 40 channels with improved common-mode noise rejection.
Two High-Speed Analog Outputs
Two 16-bit analog outputs can generate DC levels, test stimulus and buffered waveforms at rates up to 2.86 MS/s. Output load and cable capacitance should be considered when evaluating settling and waveform quality.
Digital I/O and Counters
The 24 digital lines support fixture control and logic monitoring. Four counters perform encoder, PWM, pulse, frequency, period and event-counting operations.
PCIe-6345 Applications
- High-channel-count data logging
- Automated production testing
- Electronic device validation
- Sensor and process monitoring
- Stimulus-and-response testing
- Fixture control
- Encoder and pulse measurements
Stimulus-and-Response Testing
The analog outputs can apply programmed stimulus while the analog inputs measure the DUT response. Hardware timing enables the operations to be coordinated with digital and counter events.
Production Test Fixtures
High channel density can reduce the number of DAQ boards needed in large fixtures. Verify connector, cable and terminal-block quantities during system design.
PCIe-6345 Installation Workflow
Step 1: Confirm Computer and Driver Compatibility
Verify the PCI Express slot and NI-DAQmx support.
Step 2: Plan the Connector System
Determine how many connector groups are needed and select cables for each required group.
Step 3: Install the Device
Power down the computer, follow ESD precautions and secure the card.
Step 4: Wire Analog and Digital Signals
Keep analog wiring separated from digital switching and high-current conductors.
Step 5: Configure NI MAX
Run self-test and verify every connector group using test panels.
Step 6: Create NI-DAQmx Tasks
Configure channel mode, range, rate, clock, trigger and buffer parameters.
PCIe-6345 Troubleshooting
Some analog inputs are unavailable
Check that the correct extended connector, cable and terminal block are being used.
Readings are noisy
Use shielded twisted-pair wiring and differential measurement where appropriate.
Analog output amplitude is incorrect
Check the programmed range, load impedance, offset and grounding.
Acquisition cannot sustain 500 kS/s per channel
The maximum rate is aggregate rather than 500 kS/s on every channel.
The device reports buffer overflow
Increase the buffer, reduce the rate and ensure that software reads data continuously.
PCIe-6345 Comparison
| Model | AI | AI Rate | AO | Best Use |
|---|---|---|---|---|
| PCIe-6345 | 80 | 500 kS/s | 2 | High-channel-count measurement |
| PCIe-6347 | 208 | 500 kS/s | 2 | Maximum channel density |
| PCIe-6355 | 80 | 1.25 MS/s | 2 | Higher-speed acquisition |
Select the PCIe-6345 for 80 channels at 500 kS/s. Choose the PCIe-6355 when the same channel count requires 1.25 MS/s acquisition.
PCIe-6345 Frequently Asked Questions
What is the PCIe-6345 part number?
The part number is 790686-01.
How many analog inputs are available?
It provides 80 single-ended or 40 differential inputs.
How many analog outputs are available?
Two analog outputs operating at up to 2.86 MS/s.
Is the analog input simultaneous?
No. It uses multiplexed analog input sampling.
Which software controls it?
NI-DAQmx controls the PCIe-6345.
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