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National Instruments

 National Instruments modular systems include Chassis, Power Supplies, Controllers, and Modules. The PXI, VXI, DAQ, cRIO, C Series, M Series, and more are available from Apex Waves. Buy replacement models, sell your surplus, or have your failed unit repaired. 

B Series

The National Instruments B Series is a Legacy Series of Multifunction I/O Devices. The B Series models have different channel counts, sample rates, and output rates, as well as software-selectable input ranges.

Compact FieldPoint

The National Instruments Compact FieldPoint Modules have 8 or 16 channels and encompass a variety of module types. These include: Controllers, Analog Input and Output Modules, Multifunction I/O Modules, Relay Modules, Digital Input and Output Modules, and more. The Compact FieldPoint models provide dependable embedded operation for process equipment.

MXI-Express x8 Series

The National Instruments MXI-Express x8 Series extends PCI Express communication over a cable of 5 m maximum. These devices each have one port and copper cable support.

NI Power Supplies

The NI industrial Power Supplies can be used for the following NI products: CompactRIO, CompactDAQ, Single-Board RIO, Smart Cameras, and touch panel computers. These Power Supplies have features such as a long life, large power reserves, a wide operating temperature range, and a small size.

PXI Data Storage Modules

The National Instruments PXI Data Storage Modules offer in-chassis data storage for PXI systems that require high-speed read and write functions. These modules have varying storage capacities, sustained throughput values, and module widths, ensuring the user can find a module to suit their application.

MXI-Express x4 Series

The National Instruments MXI-Express x4 Series allows users to control a PXI Express system from a x4 or higher PCI Express slot. With this series, the highest sustained throughput available is 832 MB/s with the PXIe-PCIe8372. The MXI-Express x4 models have either 1 or 2 cabled PCI Express links, an x4 lane width, and can be used with cables to 7 meters.

CVS-1450 Series

The National Instruments CVS-1450 Series of Compact Vision System models can work with a variety of automation devices, such as PLCs, relays, and robotics. These models have features such as Ethernet and RS232 ports, a high performance processor, and FireWire camera inputs.

MXI-Express x16 Series

The National Instruments MXI-Express x16 Series utilizes PCI Express signals over a cable of 3 m maximum. These modules have varying slot requirements.

PXI Power Supplies

The National Instruments PXI Power Supplies are ideal for applications such as characterization, design confirmation, and manufacturing test. The PXI Power Supplies have varying features; some of the models have isolated channels and an output disconnect feature.

MXI-3 Series

The National Instruments MXI-3 Series consists of Interface Boards and Modules. MXI-3 works as a PCI-to-PCI bridge to result in software high performance and hardware transparency. These models either have fiber-optic or copper cables.

PCI CAN Interfaces

The National Instruments PCI CAN Interfaces allow PCs to link to and communicate on a Controller Area Network (CAN) bus. The PCI CAN Interfaces utilize onboard transceivers for High-Speed/Flexible Data-Rate, Low-Speed/Fault-Tolerant, and/or Single-Wire CAN.

SC Express Series

The National Instruments SC Express Series provides data acquisition with signal conditioning, ideal for measuring thermocouples, strain gages, high-voltage analog input signals, and bridge-based transducers. The SC Express models have 8-32 channels and varying sample rates.

PXI Digital Instruments

The PXI Digital Instruments by National Instruments can perform characterization and production tests for semiconductor devices with timing sets, as well as per channel pin parametric measurement unit. The PXI Digital Instruments can be used with Digital Pattern Editor software.

PCI Digital Multimeters

The National Instruments PCI Digital Multimeters can perform voltage, current, resistance, temperature, frequency/period measurements, and diode tests. These Digital Multimeters have 3,000 S/s sample rate maximum, 2 or 4-wire resistance, AC/DC voltage, and AC/DC current.

Serial Interface Devices

The National Instruments Serial Interface Devices allow the user to communicate with and control external serial hardware by utilizing serial interfaces that support numerous protocols, including RS-232, RS-422, RS-485, and more. A maximum of 16 serial ports can be added to a system.

PCI Controllers

The National Instruments PCI Controllers allow the user to have full PC control with a software transparent link that does not need to be programmed. PC Controllers optimize the high performance of desktop computers, workstations, and servers.

PCI Multifunction Devices

The National Instruments PCI Multifunction Devices are a mix of analog I/O and digital I/O, with counter/timer functions. These devices have different channel counts, sample rates, and output rates, ensuring they will meet the requirements for laboratory automation, research, and design confirmation.


The National Instruments FlexRIO modules have user-programmable FPGAs, as well as high-performing analog, digital, and RF I/O. Multiple modules can be synchronized, data can be streamed, and signals can be processed in real-time with the use of FlexRIO.

PCI Waveform Generators

The National Instruments PCI Waveform Generators can create standard and user-customized waveforms. These Waveform Generators are well-suited for applications such as scientific research and PCI-based, high-performance systems containing quick analog signal generation.

MXI-2 Series

The National Instruments MXI-2 Series is the second generation of the MXIbus models, with more signals than the first generation. The MXI-2 Series also has a higher data throughput with a maximum of 33 MB/s between two MXI-2 models.

PXI Transfer Switch Modules

The National Instruments PXI Transfer Switch Modules have electromechanical relays. These modules can switch loads between two sources at frequencies to 40 GHz maximum. The PXI transfer Switch Modules can be programmed with the NI-SWITCH instrument driver.

PXI Resistor Modules

The National Instruments PXI Resistor Modules are ideal for simulating environmental settings in hardware‐in‐the‐loop (HIL) confirmation. These PXI Programmable Resistor Modules each have a a 37‐pin D‐SUB connector on the front panel.

PXI Carrier Modules

The National Instruments PXI Carrier Modules are utilized to create enormous matrices with over 8,000 crosspoints in one PXI chassis. PXI Carrier Modules can hold a maximum of six matrix modules.

PXI Analog Input Modules

The National Instruments PXI Analog Input Modules deliver analog input signals for PXI systems. The PXI Analog Input Modules offer as many as 32 channels and 28 bits of resolution maximum.These modules are well-suited for scalable measurement system with a low or high channel amount.

PXI Digital Multimeters

The National Instruments PXI Digital Multimeters or DMMs have features such as 2 or 4-wire resistance, frequency/period measurements, and AC/DC voltage and current. The NI PXI Digital Multimeters can complete voltage, current, resistance, temperature, inductance, capacitance, frequency/period measurements, and diode tests, in PXI systems.

PXI Source Measure Units

The National Instruments PXI Source Measure Units or SMUs offer accurate voltage or current sourcing and measurement features for PXI systems. The PXI SMUs have a versatile sample rate, streaming function, and a high-speed update rate.

SC Series

The National Instruments SC Series Modules come with features, such as 200 kS/s, 16-bit, and either 2 or 8 analog input channels. These modules have integrated signal conditioning for strain/bridge inputs.

PXI Analyzers

The National Instruments PXI Analyzers are an affordable option with astounding software analysis capabilities via NI LabVIEW. The PXI Analyzers have a maximum 26.5 GHz frequency range and as high as 765 MHz bandwidth.

PXI Amplifiers

The National Instruments PXI Amplifiers enhance the dynamic range and sensitivity of certain PXI RF Vector Signal Analyzers. The PXI Amplifiers are one slot, 3U PXI Modules with both fixed and configurable gain.

PXI Attenuators

The National Instruments PXI Attenuators have two channels of programmable attenuation. The PXI Attenuators enhance the power preciseness of RF Signal Generators in the low power ranges.

PXI Signal Generator Modules

The National Instruments PXI Signal Generators can create ongoing wave signals or basic modulation methods, such as AM, FM, PM, and pulse. The PXI Signal Generators have frequency ranges ranging from 250 kHz to 20 GHz.

NI-656x Series

The National Instruments NI-656x Series Modules have a digital I/O interfacing that communicates single-ended, differential, and serial signals with the PXI FPGA. These modules offer a maximum of 54 configurable digital I/O channels with the ability to communicate with single-ended, differential, and serial signals at different voltage levels. These can be used to test custom protocols in real time.

GPIB Instrument Control Modules

The National Instruments GPIB Instrument Control Modules are licenced with the NI-488.2 software driver. They are reliable for connection to third-party instruments by the GPIB. This series is compatible with IEEE's 488.2 industrial level standards for transfer rates offering system configuration.

PXI-CAN Interface Series

The National Instruments PXI-CAN Interface Series allows PXI chassis to communicate to the CAN buses. They communicate using onboard and external transceivers. By using the NI-XNET driver, these modules can be used for applications requiring real-time, high-speed manipulation of many CAN frames and signals. An onboard processor is able to move CAN frames between the interface and the user seamlessly without taking up host processor time.

E Series

The National Instruments E Series Modules have 16 or 64 channels with 16-bit resolution and a sampling rate maximum of 1.25 MS/s. These Modules are Multifunctioning DAQ for PXI and PCI boards.

DIO Series

The National Instruments DIO Series (Digital I/O Series) is compiled of digital signals and patterns at different logic levels. This series includes PXI digital I/Os. The devices are capable of toggling control lines and characterizing different circuits. There are platform modules which mesh with the modular hardware and have the ability to include multiple types of modules into one system. There is also the stand-alone/ computer-base which allows integration with computers without modular hardware.

Analog Output Devices

The National Instruments Analog Output Devices are able to replace many different parts in a system due to their wide range of features. The devices can replace PID controllers, function generators, and low-speed arbitrary waveform generators. They offer a range of channel counts, output resolutions, and features. These devices allow the creation of applications like signal or sensor simulation, power supply control, and deterministic control.

M Series

The National Instruments M Series Modules have NI-STC2 chips for advanced timing and synchronization. They are best used for PCI and PXI buses. The series combines analog I/O and digital I/O with counters and timers into a single device. The M Series modules also have NI-PGIA2 amp technology, the NI-MCal methods, and high-speed digital isolators.

C Series

The National Instruments C Series Modules connect and support sensors and busses to take measurements, including but not limited to, temperature, audio frequency, resistance, and voltages. They are portable and useable in data acquisition applications.


The National Instruments FieldPoint Series consists of 2, 8, and 16 channel modular distributed I/O. The FieldPoint models are hot-swappable, auto-configurable, and come with programmable power-up states.

PXI Vector Signal Generators

The National Instruments PXI Vector Signal Generators create arbitrary modulated signals from standard modulation schemes and standard-specific waveforms for cellular communications, as well as wireless connectivity. The PXI Vector Signal Generators can create communications formats, such as WCDMA, DVB-H, GPS, and others.

PXI Chassis

The National Instruments PXI Chassis are home to the PXI modules and are used to connect them to the high-performance backplane with timing and synchronization capabilities. These chassis are compatible with PXI, PXIe, and PXI hybrids with the cooling requirements of the most power draining modules. The chassis have either AC and DC power, with up to 18 slots, and are compatible with a variety of PXI and PXIe modules.

Frame Grabbers

The National Instruments Frame Grabbers allow open camera connectivity.The Frame Grabbers allow inline FPGA, open camera connectivity, and I/O integration. This series is best used with machine and high-performance scientific applications. The  open camera conectivity means the Frame Grabbers operate with cameras of multiple types. I/O integration is the ability to mesh easily with NI DAQ and industrial coms hardware. Inline FPGA is image processing where the grabbers send visual applications to levels without interrupting the FPGA design.

CompactRIO Controllers

The CompactRIO models are high-performance processors with sensor specific I/O and toolchain integrated software that is ideally used for the Industrial Internet of Things (the IIoT). They are also used for monitoring and controlling applications. Regardless of the requirements, the cRIO gives direct sensor connectivity.


The National Instruments CompactDAQ is a method of data acquisition that uses connectivity and signal conditioning by meshing them into modular I/O for direct interfacing to sensors and signals. This system can use multiple measurement types at one time. The DAQ Controller utilizes Intel multicore processors to log data, as well as provides a way to store and remove data with ease.


The National Instruments SCC Series is a series of conditioning modules. Some of them provide analog input, while others provide a strain input signal. The modules can be cascaded on one channel to create a dual-stage. There are multiple types of modules within this series, including: attenuators, lowpass filters, and current output modules.

PXI Vector Signal Transceivers

The National Instruments PXI Vector Signal Transceivers are a combination of vector signal generator, analyzer, and a user-programmable FPGA. These devices are used for applications such as cellular device testing. The PXI Vector Signal Transceivers are easily expanded to support multiple input and output configurations.

S Series

The National Instruments S Series devices are Simultaneous Sampling Multifunction DAQs. They are ideal for applications, such as ultrasonic, ballistic, and radar transient recording and analysis. These devices are created with an analog-to-digital converter, which makes them superior to other devices regarding throughput and channel accuracy. There are pre/post-analog and digital trigger options. The S Series devices have analog and digital I/O, as well as counters and timers. The S series models are also hybrid-slot compatible.

DSA Devices

The National Instruments DSA Devices were made to measure the frequency of signals with a large dynamic. These systems include high channel counting and phase measuring. This requires precise synchronization within the channels. The synchronization of these devices allows high measurement accuracy.


The National Instruments SCXI Series includes chassis and modules used for signal conditioning and switching. The National Instruments SCXI modules are terminal blocks, which provide multiple methods to connect to the SCXI chassis such as front-end, rack-mount, and DIN-rail. These different forms of blocks add different features to the system's flexibility.

NI-660x Series

The National Instruments NI-660x Series of Counter/Timer Modules are deviced that have a maximum of 32-bit counters and timers. They allow channels to be configured to use another channel's gate input as its own. These devices can be used as a master for other cards, but must be connected to output pins. 

R Series

The National Instruments R Series of Multifunction RIO Modules are configurable with the FPGA module. The R series devices have features such as a dedicated ADC and independent timing and triggering. These features offer functionality of multirate sampling and single channel triggering.

RT Series

The National Instruments RT Series of PXI Controllers are able to run on their own or controlled by the computer. This series provides real-time reliable I/O measurements, automation, and control. The real-time application can be sent across the network and monitored remotely due to the configuration and remote programming features.

NI-73xx Series

The National Instruments NI-73xx Series of Motion Controller Modules are Stepper and Servo Motors and their counterpart drivers and interfaces. They can be used for basic and advanced motion control applications. The basic applications include: linear interpolation and real-time system integration. The advanced applications include: blended motion trajectory and fully coordinated vector space control.

PXI Controllers

The National Instruments PXI Controllers are Compact Embedded computer solutions for PXI(e) and Compact PCI systems with high-performance capabilities. They come with integrated CPUs, Hard Drives, RAM, Ethernet, and other peripheral features. They allow up to 8 GB/s system and 2 GB/s slot throughput.

HSDIO Series

The National Instruments High Speed Digital I/O Devices are devices with programmable voltage levels. This series uses DDR to create data. These devices are compatible with each other and other measurement NI devices, or can stand alone. These devices can be used to create high-channel-count, high-performance digital, or mixed-signal systems.

NI-654x Series

The NI-654x Series of Digital Waveform Instruments are waveform editors used to visualize digital signals and create, edit, and change waveforms. It gives 6 digital stages to begin with, while also allowing the user to create a custom waveform. This series is able to find and point out bit errors in the editor so that they can be fixed in real-time.

Timing and Synchronization Modules

The National Instruments Timing and Synchronization Modules use trigger buses and reference clocks to synchronize multiple devices in a system. The synchronization will either be time or signal based. The modules work in a master slave method. One keeps time while the others measure and receive the signal. The modules work on the same clock and gather data at sample rates that may vary.

PXI Waveform Generators

The National Instruments PXI Waveform Generators are able to produce exact sine, triangle, and square waveforms. These PXI Waveform Generators are ideal for many different forms of mixed signal tests, such as: Consumer Electronics, Aerospace/Defense, and Automotive Testing. These models create standard function or user-defined arbitrary waveforms as a part of the PXI system.

MXI-Express x1 Series

The National Instruments MXI-Express x1 Series Multisystem Extension Interface is a cabled link for the PCIe to control the PXI, PXIe, VXI, or CompactRIO by way of  PCs or hosts with an ExpressCard slot. This series can control the previously mentioned with PCI(e) or a mobile adapter for the host. This creates a physical separation between the host and the measurement, while combining the PCI(e), CompactPCI(e), PXI(e), and CompactRIO.

X Series

The National Instruments X Series of Multifunction I/O Devices are a compiliation of hardware analog and digital I/O, with four counters in a device. The X Series Multifunction I/O Devices are a cost effective option for basic under test characterization and automation. The X Series devices make synchronizing and generating on subsystems easier. These devices also allow the synchronization of two or more devices for expansion.

MXI-4 Series

The National Instruments MXI-4 Series Multi-System Extension Interface for PCI, CompactPCI, and PXI Bus Computers is a master/slave set using two separate buses by linking them with a data link. This series has the ability to control the PXI backplane with either a PCI based PC or a PXI/CompactPCI system. This series also gives more slots for applications.

PXI Signal Insertion Modules

The National Instruments PXI Signal Insertion Switch Modules are also referred to as fault insertion units or FIUs. These Modules deliver a set of feedthrough channels, which enable the switch to be transparent to the system when it is closed. 

PXI Multiplexer Modules

The National Instruments PXI Multiplexer Modules are well-suited for high-channel count applications that need to link measurement or signal generation instruments to numerous test points on devices or units under test. The PXI Multiplexer Switch Modules utilize different relay types to allow the user to choose the model that best suits their needs. 

PXI Relay Modules

The National Instruments PXI Relay Modules are comprised of numerous separate relays with varying relay types, such as single-pole single-throw (SPST), single-pole double-throw (SPDT), and double-pole double-throw (DPDT) relays. The PXI Relay Modules allow the user to connect or disconnect separate relays to to make wiring in automated test systems less complicated. 

PXI Matrix Switch Modules

The National Instruments PXI Matrix Switch Modules are created with rows and columns and offer versatility for switching systems by enabling the user to link any channel to another channel. PXI Matrix Switch Modules utilize many types of relays, including: electromechanical armature relays, reed relays, and solid-state relays.