PCI 模块

NI PCI and PCIe Modules

NI PCI Modules install directly inside desktop computers, industrial PCs and compatible workstations to provide data acquisition, signal generation, digital control, timing, waveform digitizing, FPGA processing, machine vision and industrial communication functions. PCI and PCI Express devices are widely used in automated test, laboratory measurement, production validation, machine monitoring and legacy-system maintenance.

Selecting the correct module requires matching the measurement function, computer slot, signal type, channel count, sample rate, bandwidth, isolation, timing architecture, connector accessories and software support. Conventional PCI and PCI Express are different interfaces and are not mechanically interchangeable.

Types of NI PCI Modules

Module Category
Primary Functions
Typical Applications
Key Selection Criteria

PCI Data Acquisition Devices
Analog input, analog output, digital I/O and counter/timer functions
General automated testing, voltage measurement, data logging and machine integration
Channel count, input range, resolution, sample rate and sampling architecture

PCI Analog Output Devices
Static or waveform voltage and current generation
Sensor simulation, control setpoints, test stimulus and hardware-in-the-loop systems
Output range, resolution, update rate, settling time and load capability

PCI Digital I/O Devices
Digital state monitoring, industrial control and hardware-timed pattern I/O
Test fixtures, relay control, alarm monitoring and production automation
Logic voltage, isolation, direction, current capability and timing mode

PCI Counter/Timer Devices
Event counting, frequency measurement, encoder acquisition and pulse generation
Motion monitoring, tachometers, flow meters, PWM and machine timing
Counter quantity, edge rate, timebase accuracy, filtering and buffering

PCI Dynamic Signal Acquisition
High-dynamic-range, simultaneously sampled sound and vibration acquisition
Acoustic analysis, vibration testing, NVH and machine-condition monitoring
IEPE conditioning, bandwidth, dynamic range, coupling and anti-alias filtering

PCI High-Speed Digitizers
High-speed waveform and transient acquisition
Electronic validation, pulse analysis, communications testing and scientific measurement
Analog bandwidth, sample rate, vertical resolution, memory and triggering

PCI FPGA and RIO Devices
User-programmable FPGA processing and reconfigurable digital or analog I/O
Custom protocols, low-latency control, inline processing and specialized test systems
FPGA resources, I/O type, clock rate, adapter compatibility and development software

PCI Vision Acquisition
Image acquisition from industrial cameras
Inspection, identification, alignment, measurement and machine guidance
Camera interface, pixel clock, resolution, frame rate and trigger support

PCI Industrial Communication Interfaces
CAN, LIN, FlexRay, serial, GPIB and other supported communication interfaces
Automotive networks, instrument control, industrial equipment and protocol testing
Protocol, port count, transceiver, isolation, termination and driver support

MXI Interfaces
Connects a host computer to a compatible PXI or PXI Express chassis
Remote control of modular instrumentation and expansion of automated test systems
MXI generation, host interface, chassis interface, cable and topology

The term “PCI Modules” on this page covers both conventional PCI and PCI Express measurement cards. Always verify the exact bus interface because a PCI card cannot be installed in a PCIe slot, and a PCIe card cannot be installed in a conventional PCI slot.

PCI Compared with PCI Express

Interface
Architecture
Best Fit
Compatibility Requirement

PCI
Legacy shared parallel computer bus
Existing industrial computers, established test stations and legacy-system maintenance
Compatible PCI slot, voltage keying, bracket clearance, driver and operating-system support

PCI Express
Point-to-point serial interface using one or more PCIe lanes
Modern workstations, higher-throughput acquisition and new PC-based systems
Compatible PCIe slot, sufficient lane allocation, mechanical clearance and supported driver

A physically longer PCIe slot can often accept a shorter-lane card, but motherboard design and lane allocation can affect available bandwidth. Some computer slots also share lanes with graphics cards, storage controllers or other expansion hardware.

For legacy PCI hardware, confirm both the physical connector and its voltage keying. Do not assume that every computer advertised with an expansion slot supports every generation of PCI measurement device.

Representative NI PCI and PCIe Modules

Model
Unique Category
Primary Capability
Best Fit

PCIe-6363
Multifunction Data Acquisition
Combines analog input, analog output, digital I/O and four 32-bit counters/timers
General automated measurement and control systems requiring mixed I/O

PCI-6704
Static Analog Output
Multichannel analog voltage and current output for control-level signals
Setpoint generation, process control and multichannel device simulation

PCI-6518
Industrial Digital I/O
Isolated digital input and output for industrial monitoring and control
Factory equipment, test fixtures and higher-voltage digital interfaces

PCI-6602
Dedicated Counter/Timer
Multiple hardware counters for event, frequency, encoder and pulse operations
Motion monitoring and systems requiring several simultaneous timing tasks

PCI-4462
Dynamic Signal Acquisition
Precision simultaneous acquisition for sound and vibration measurements
Acoustic, vibration, structural and rotating-machinery analysis

PCI-5922
High-Resolution Digitizer
Flexible-resolution waveform acquisition for precision electronic measurement
Transient capture, communications analysis and component characterization

PCIe-7857R
FPGA and Reconfigurable I/O
User-programmable FPGA with reconfigurable I/O and deterministic processing
Custom timing, control, protocols and inline signal processing

PCIe-1433
Vision Acquisition
Industrial image-acquisition interface for compatible cameras
High-performance machine vision, inspection and synchronized imaging

PCIe-8510
Vehicle Network Interface
PC-based interface for supported automotive network communication
Electronic control unit testing, vehicle-network logging and simulation

PCIe-8361
MXI-Express Host Interface
Host-side connection between a compatible computer and PXI Express system
Controlling a PXIe chassis from an external desktop or workstation

These models represent major PCI module architectures rather than every device available in the NI product family. Verify the complete model number, hardware revision, connector, cable, driver and operating-system support before ordering.

How to Select an NI PCI Module

1. Identify the Measurement or Interface Function

Begin with the electrical signals and required task. Determine whether the system needs analog acquisition, analog generation, digital monitoring, counter measurement, high-speed waveform capture, sound and vibration acquisition, image capture, FPGA processing or communication with external equipment.

A multifunction DAQ card is appropriate when one system requires moderate numbers of analog, digital and counter channels. Specialized digitizers, dynamic signal devices, vision interfaces and FPGA cards are preferable when the application requires capabilities that are not available from general-purpose DAQ hardware.

2. Verify the Computer Expansion Slot

Inspect the host computer or motherboard to determine whether it provides PCI or PCI Express slots. For PCIe devices, check the physical slot size, available lanes, chipset allocation and whether another installed card blocks the required space.

Also confirm:

Full-height or low-profile bracket requirements
Computer power-supply capacity
Cooling and airflow around the module
Clearance for cables and adjacent expansion cards
BIOS and chipset compatibility
Operating-system and driver support

3. Record Every Required Signal

List all analog inputs, analog outputs, digital lines, counters, triggers, clocks and communication ports. For each signal, record its voltage range, source impedance, grounding arrangement, bandwidth, update rate and connector requirement.

General-purpose analog inputs normally measure voltage or already conditioned sensor signals. Thermocouples, RTDs, strain gauges, IEPE accelerometers, charge-mode sensors and other low-level transducers may require external signal conditioning or a dedicated sensor-measurement platform.

4. Select the Required Input Range and Resolution

Choose an input range that accommodates the complete expected signal, including offset, noise and normal overload conditions. Using an unnecessarily wide input range reduces the portion of the converter range used by the measurement.

ADC resolution alone does not determine system accuracy. Input noise, gain error, offset, temperature drift, source impedance, grounding and external interference also affect usable measurement performance.

5. Determine Sample Rate and Bandwidth

Select the required measurement bandwidth before comparing sample rates. Slow process signals may require only a few samples per second, while transient, acoustic and electronic waveform measurements can require much higher rates.

Check whether the published sample rate applies to each channel or is shared across all active channels. A multiplexed device samples channels sequentially through a shared converter, while a simultaneous-sampling device uses independent conversion paths to preserve interchannel timing.

6. Decide Between Multiplexed and Simultaneous Sampling

Multiplexed DAQ devices are suitable for general voltage acquisition, data logging and applications where small timing differences between channels are acceptable. They can provide a cost-effective combination of analog and digital functions.

Simultaneous sampling is important when phase relationships must be preserved, including:

Power and energy measurements
Sound and vibration analysis
Strain, force and pressure correlation
Motor and rotating-machinery testing
Transient-event measurement
Multichannel waveform comparison

7. Review Isolation and Grounding

Isolation can help manage common-mode voltage, ground-potential differences and industrial electrical noise. Confirm whether the module provides channel-to-channel, bank or bus isolation and verify the associated working-voltage limits.

Non-isolated devices require a carefully designed grounding arrangement. Differential measurement does not provide the same protection as electrical isolation. Long cables, grounded signal sources and machinery installations should be reviewed for ground-loop risk.

8. Confirm Triggering and Synchronization

Determine whether the application needs a digital start trigger, analog trigger, reference trigger, shared sample clock or external timebase. Software-started tasks do not necessarily begin at the same instant.

Hardware synchronization should be used when multiple cards must preserve phase, correlate events or coordinate input and output. Confirm whether the required timing signals can be routed internally through the computer system or must be connected through external terminals.

9. Calculate Data Throughput

For continuous acquisition, calculate the approximate payload rate:

Data rate = active channels × sample rate × transferred bytes per sample.

Include simultaneous input and output streams, digital data, image data, metadata and operating margin. The module, PCIe link, system memory, processor, application and storage device must all sustain the required transfer rate.

10. Confirm Cables and Terminal Accessories

PCI modules normally require an external cable and terminal block, breakout accessory, camera cable, communication cable or adapter module. The module and its connectivity should be selected as one complete assembly.

Verify:

Board connector and cable part number
Terminal-block compatibility
Differential or single-ended wiring
Shielding and cable-length requirements
Required signal conditioning
Connector pinout and legacy-fixture compatibility

PCI Data Acquisition and Analog I/O

PCI and PCIe DAQ devices acquire voltage and compatible conditioned sensor signals directly inside a computer. Multifunction devices may combine analog input, analog output, digital I/O and counters on one board, simplifying general-purpose automated test systems.

Important analog-input specifications include channel count, resolution, input range, maximum sample rate, analog bandwidth, input impedance, common-mode range and sampling architecture.

Analog outputs can generate control setpoints, simulated sensor signals, test stimuli and arbitrary waveforms where supported. Confirm output range, update rate, resolution, current capability, settling time and load impedance.

DAQ analog outputs are control-level signals. Motors, valves, heaters and other power loads normally require an external amplifier, driver or isolated power interface.

PCI Digital I/O and Counter/Timer Modules

Digital I/O modules monitor or control discrete electrical states. Applications include switches, alarms, relays, interlocks, fixture control and digital pattern validation. Selection depends on logic voltage, direction, isolation, output current and whether software-timed or hardware-timed operation is required.

Counter/timer devices measure compatible pulse signals and can perform event counting, frequency and period measurement, pulse-width measurement, encoder position acquisition and pulse-train generation.

Do not assume that every digital line supports counter, encoder or hardware-timed waveform functions. Dedicated timing resources and ordinary static digital I/O lines are different hardware functions.

PCI Dynamic Signal Acquisition

Dynamic signal acquisition devices are designed for sound, vibration and other high-dynamic-range measurements. They commonly provide simultaneous sampling, anti-alias filtering and precision input circuitry. Selected devices may also support IEPE sensor excitation and AC or DC coupling.

Important selection criteria include:

Voltage or IEPE sensor compatibility
Input coupling and range
Frequency range and usable bandwidth
Dynamic range and input noise
Sample rate per channel
Phase matching and synchronization
Compatible analysis software

PCI High-Speed Digitizers

PCI and PCIe digitizers capture fast waveforms and transient events using oscilloscope-style acquisition hardware. They are used for pulse testing, electronic characterization, communications analysis and scientific measurement.

Choose a digitizer by analog bandwidth, real-time sample rate, vertical resolution, input range, onboard memory, channel count, trigger capability and sustained data-transfer requirement.

Sample rate and analog bandwidth are not interchangeable specifications. The analog front end must pass the signal content, while the converter must sample it at a rate appropriate for the waveform and measurement method.

PCI FPGA and RIO Devices

PCI and PCIe RIO devices combine reconfigurable FPGA processing with digital or mixed-signal I/O. Instead of using only fixed measurement functions, engineers can implement custom timing, triggering, protocols, filtering and closed-loop logic directly in hardware.

FPGA selection should consider:

FPGA family and available logic resources
Digital or analog I/O configuration
Clock rates and timing resolution
Required DMA channels and host throughput
Adapter module or cable compatibility
LabVIEW FPGA and driver licensing
Compilation and application-maintenance requirements

FPGA hardware is appropriate for applications requiring customization or deterministic processing. A standard DAQ card may be simpler when the task only requires conventional analog, digital or counter measurements.

PCI Vision Acquisition

PCI vision-acquisition devices transfer image data from compatible industrial cameras into a computer for inspection and analysis. Applications include defect detection, dimensional measurement, alignment, identification and machine guidance.

Verify the camera interface, resolution, pixel format, pixel clock, frame rate, cable, trigger signals and camera power arrangement. Camera Link, GigE Vision and other camera standards are not interchangeable merely because they perform image acquisition.

System throughput must support the complete image stream:

Image data rate = width × height × bytes per pixel × frames per second.

Include protocol overhead, multiple cameras and image-processing requirements when selecting the host computer.

PCI Industrial Communication Interfaces

Industrial communication cards connect the computer to instruments, vehicle networks and automation equipment. Depending on the model, supported interfaces may include CAN, LIN, FlexRay, serial communication or GPIB.

Selection requires the exact protocol, transceiver type, port quantity, maximum data rate, isolation, termination, connector, cable and software driver. A physical connector does not by itself identify the supported communication standard.

For vehicle-network interfaces, confirm whether the application requires monitoring, frame transmission, database-based signal conversion, bus simulation or synchronized communication with measurement channels.

MXI Interfaces for PXI System Control

MXI interfaces allow an external computer to control a compatible PXI or PXI Express chassis. A typical system includes a host-interface card, chassis-side interface and matched MXI cable.

The complete MXI generation and connection path must be compatible. Do not combine host cards, chassis interfaces and cables from unrelated MXI families based only on connector appearance.

For high-throughput systems, include the MXI connection in the bandwidth calculation. A high-performance PXIe chassis cannot overcome a slower host link.

Software and Driver Compatibility

The required NI driver depends on the module family. Common examples include:

Module Family
Common NI Software
Compatibility to Verify

Multifunction DAQ, Analog I/O, Digital I/O and Counters
NI-DAQmx
Device support, operating system and programming environment

High-Speed Digitizers
NI-SCOPE
Instrument model, driver version and acquisition features

FPGA and RIO
NI-RIO and LabVIEW FPGA
FPGA target support, compilation tools and required licenses

Vehicle Networks
NI-XNET or model-specific driver
Protocol, interface generation and database support

Vision Acquisition
NI Vision Acquisition Software
Camera interface, operating system and analysis-software requirements

GPIB Instrument Control
NI-488.2
Controller hardware, operating system and application API

PXI and MXI System Components
NI PXI Platform Services
Chassis, controller, interface and operating-system support

NI Measurement & Automation Explorer can be used with supported devices to confirm recognition, inspect installed drivers, run self-tests and review hardware resources. LabVIEW, C/C++, .NET, Python and other environments may be used where supported by the applicable driver.

Legacy PCI cards may depend on older driver releases or operating systems. Verify the complete hardware and software stack before upgrading the computer or application.

PCI Modules Compared with USB and PXI

Platform
Primary Advantage
Best Fit
Key Limitation

PCI or PCI Express
Direct installation, compact PC integration and low external-cabling complexity
Dedicated desktop and industrial computer test stations
Computer slot, cooling and operating-system dependence

USB
Portable connection and simple installation
Laboratory, portable and laptop-based measurement
External cabling, USB topology and host-controller sharing

PXI or PXI Express
Modular instrumentation, synchronization and scalable system integration
Multidevice automated test and high-channel-count systems
Requires a compatible chassis and controller

CompactDAQ
Flexible sensor connectivity using interchangeable C Series modules
Distributed sensor measurement and data logging
Not intended to replace specialized high-speed modular instruments

CompactRIO
Real-time control and FPGA-based embedded processing
Standalone deterministic control and industrial monitoring
Requires real-time and FPGA development planning

Typical Applications

Automated production and functional testing
Laboratory measurement and engineering research
Industrial machine monitoring and control
Electronic component and circuit validation
Voltage, current and conditioned sensor acquisition
Analog stimulus and sensor simulation
Digital test fixtures and relay control
Encoder, frequency, PWM and event measurement
Sound, vibration and NVH analysis
High-speed waveform and transient capture
Machine vision and automated inspection
CAN, LIN, FlexRay, serial and GPIB communication
FPGA-based custom protocols and real-time processing
Automotive, aerospace and semiconductor validation
Maintenance of established legacy test systems

Legacy PCI Module Replacement

Replacing a legacy PCI card with a newer PCIe device requires more than matching its channel count. The replacement may use a different computer interface, connector, cable, terminal block, sampling architecture, timing route or driver API.

Compare the following before approving a replacement:

PCI or PCI Express bus compatibility
Module height, bracket and mechanical clearance
Analog input and output channel quantities
Digital I/O and counter resources
Input range, output range and signal levels
Resolution, sample rate and analog bandwidth
Multiplexed or simultaneous-sampling architecture
Isolation, grounding and common-mode limits
Trigger, clock and synchronization capabilities
Connector, cable and terminal-block pinout
Driver, operating-system and application-code support

Requalify the replacement using the actual test fixture, sensors, signal sources, acquisition duration and pass/fail limits before returning the system to production.

PCI Module Procurement and RFQ Guide

Provide the following information for accurate module selection and quotation:

Required NI model and complete part number
PCI or PCI Express computer interface
Host computer, motherboard and available slot type
Required measurement, output or communication function
Analog, digital, counter, camera or communication channel quantity
Signal type, voltage range and source impedance
Required resolution, sample rate and bandwidth
Need for simultaneous sampling, triggering or synchronization
Grounding, isolation and common-mode conditions
Continuous data-rate and recording-duration requirements
Required cables, terminal blocks and breakout accessories
Operating system, NI driver and application-software version
Existing module and accessory models for replacement projects
Required quantity, preferred product condition and destination

For pre-owned PCI hardware, request device-recognition and functional test results. Inspect the external connector, computer-bus edge connector, bracket and board components for damage or contamination.

FAQ

What is the difference between PCI and PCIe modules?

PCI uses a legacy shared parallel bus, while PCI Express uses point-to-point serial links. Their physical connectors and electrical interfaces are different, so the module must match the computer slot.

Can a PCI module be installed in a PCIe slot?

No. Conventional PCI cards and PCI Express cards are not mechanically or electrically interchangeable.

Can a PCI DAQ module measure sensors directly?

It can measure sensors that provide compatible voltage or current signals. Thermocouples, RTDs, strain gauges, IEPE sensors and other transducers requiring excitation or dedicated conditioning may need external signal-conditioning hardware.

When is simultaneous sampling required?

Simultaneous sampling is important when phase and timing relationships between channels must be preserved, such as power, vibration, dynamic strain and multichannel transient measurements.

Should I choose a multifunction DAQ card or a digitizer?

Choose multifunction DAQ for mixed analog, digital and counter functions at general-purpose acquisition rates. Choose a digitizer when the application requires higher analog bandwidth, faster waveform sampling, deeper acquisition memory or oscilloscope-style triggering.

When should I use a PCI FPGA device?

Use an FPGA or RIO device when the application requires custom hardware timing, unusual digital protocols, deterministic processing or low-latency control that cannot be implemented with a fixed-function DAQ device.

Can a newer PCIe module directly replace an older PCI card?

Not automatically. Compare signal ranges, channel count, sampling architecture, timing functions, connectors, cables, driver support and application code before approving the replacement.

Are cables and terminal blocks included with every PCI module?

They should not be assumed to be included. Verify the module connector and order the compatible cable, terminal block, breakout accessory or adapter required by the application.

Related NI Measurement Platforms

Use NI PXI systems for scalable modular instrumentation and multidevice synchronization, CompactDAQ systems for flexible sensor measurement, or CompactRIO systems for real-time and FPGA-based embedded control. Additional measurement hardware is available through the NI product catalog.

NI PCI Modules from PXISOURCE

PXISOURCE supports engineers, system integrators and procurement teams with NI PCI and PCIe module selection, computer compatibility review, cable and terminal-block matching, software verification and legacy-system replacement. Send the required model, measurement function, signal specifications, computer configuration and software version for a technically matched quotation.

Need help selecting the right NI PCI module? Email [email protected] or contact PXISOURCE on WhatsApp.