\n\u0417\u0435\u043c\u043b\u044f NI USB-7855R<\/strong>, also commonly referenced as USB-7855<\/strong>, is an R Series Multifunction Reconfigurable I\/O (RIO) device<\/strong> designed for hardware-in-the-loop (HIL) testing, sensor simulation, custom protocol communication, high-speed control, automated test, and FPGA-based measurement applications.\n<\/p>\n \nThe USB-7855R combines multifunction analog and digital I\/O with a user-programmable Xilinx Kintex-7 70T FPGA<\/strong>. It supports analog input sampling rates up to 1 MS\/s<\/strong> and provides direct FPGA control over I\/O signals for deterministic timing, synchronization, triggering, and real-time processing.\n<\/p>\n \nUnlike conventional multifunction DAQ devices, the USB-7855R features a dedicated A\/D converter per analog input channel<\/strong>. This architecture enables independent channel timing, individual channel triggering, and multirate sampling for advanced measurement and control systems.\n<\/p>\n \n\u0417\u0435\u043c\u043b\u044f National Instruments USB-7855R<\/strong> belongs to the NI R Series Multifunction RIO family and connects to a host computer through Hi-Speed USB 2.0<\/strong>.\n<\/p>\n \nA typical system architecture is:\n<\/p>\n \nSensors \/ DUT \u2192 USB-7855R I\/O \u2192 Kintex-7 FPGA \u2192 USB \u2192 Host Computer<\/strong>\n<\/p>\n \nCritical measurement, timing, triggering, signal-processing, and control functions can execute directly on the FPGA rather than relying entirely on the host operating system.\n<\/p>\n \nThis architecture makes the USB-7855R particularly useful for applications requiring deterministic hardware behavior while retaining the convenience of an external USB-connected device.\n<\/p>\n \nThe USB-7855R incorporates a user-programmable Xilinx Kintex-7 70T FPGA<\/strong>.\n<\/p>\n \nThe FPGA can implement application-specific hardware functions such as:\n<\/p>\n \nThe USB-7855R supports analog input sampling rates up to 1 MS\/s<\/strong>.\n<\/p>\n \nThis acquisition performance is suitable for high-speed control, HIL testing, dynamic measurements, sensor simulation, and automated test applications requiring deterministic FPGA processing.\n<\/p>\n \nA major advantage of the USB-7855R is its dedicated A\/D converter per analog input channel<\/strong>.\n<\/p>\n \nUnlike multiplexed DAQ hardware, individual channels do not need to share one ADC through a multiplexer.\n<\/p>\n \nThis architecture enables:\n<\/p>\n \nThe USB-7855R supports FPGA-based multirate sampling<\/strong>, allowing different measurement functions to operate at different rates according to application requirements.\n<\/p>\n \n\u041d\u0430\u043f\u0440\u0438\u043c\u0435\u0440:\n<\/p>\n \nHigh-Speed Acquisition \u2192 Critical Signals<\/strong> \nThis flexibility is particularly valuable in HIL and complex automated test systems.\n<\/p>\n \nThe dedicated ADC architecture allows application designs with individual channel triggering<\/strong>.\n<\/p>\n \nThis provides greater flexibility than conventional DAQ devices when different signals require independent acquisition conditions.\n<\/p>\n \nThe USB-7855R connects to a host computer through USB 2.0 Hi-Speed or Full-Speed<\/strong>.\n<\/p>\n \nFor maximum device performance, a Hi-Speed USB connection should be used. Operating through a Full-Speed bus can reduce performance and may prevent the device from reaching maximum sampling or update rates.\n<\/p>\n \nUnlike PCI Express and PXI Express R Series devices, the USB-7855R is an external instrument.\n<\/p>\n \nThis makes it suitable for:\n<\/p>\n \nMeasurement and control algorithms can execute directly in FPGA hardware.\n<\/p>\n \nA simplified control architecture is:\n<\/p>\n \nInput Signal \u2192 FPGA Algorithm \u2192 Decision Logic \u2192 Output Response<\/strong>\n<\/p>\n \nThis reduces dependence on nondeterministic host operating-system timing for critical control functions.\n<\/p>\n \nThe USB-7855R combines physical I\/O with an onboard FPGA that can directly process acquired signals and control outputs.\n<\/p>\n \nA simplified measurement architecture is:\n<\/p>\n \nPhysical Signal \u2192 Analog \/ Digital I\/O \u2192 Kintex-7 FPGA \u2192 Custom Processing \u2192 USB \u2192 Host Computer<\/strong>\n<\/p>\n \nFor deterministic control applications:\n<\/p>\n \nSensor Input \u2192 FPGA \u2192 Control Algorithm \u2192 Output \u2192 DUT \/ System<\/strong>\n<\/p>\n \nBecause critical logic can execute directly on the FPGA, the host computer does not need to participate in every time-critical measurement or control operation.\n<\/p>\n \nAn R Series Multifunction RIO device<\/strong> combines analog and digital I\/O resources with a user-programmable FPGA.\n<\/p>\n \nTraditional DAQ devices generally provide predefined hardware functions, while R Series devices allow engineers to customize significant portions of device behavior.\n<\/p>\n \nCustom FPGA functionality can include:\n<\/p>\n \nFPGA-based I\/O is useful when an application requires deterministic response, parallel processing, or specialized hardware behavior.\n<\/p>\n \nA conventional software-controlled architecture may operate as:\n<\/p>\n \nSensor \u2192 DAQ \u2192 USB \u2192 Operating System \u2192 Application \u2192 Decision<\/strong>\n<\/p>\n \nWith the USB-7855R, time-critical processing can instead operate as:\n<\/p>\n \nSensor \u2192 FPGA \u2192 Decision \u2192 Output<\/strong>\n<\/p>\n \nThe host computer can then handle higher-level functions such as configuration, visualization, data logging, reporting, and user interaction.\n<\/p>\n \nHardware-in-the-loop testing<\/strong> is one of the primary applications for the USB-7855R.\n<\/p>\n \nIn an HIL system, FPGA-based I\/O can interact with a controller or embedded device while reproducing the electrical behavior of sensors, actuators, or other parts of the simulated system.\n<\/p>\n \n\u0422\u0438\u043f\u0438\u0447\u043d\u044b\u0435 \u043f\u0440\u0438\u043c\u0435\u043d\u0435\u043d\u0438\u044f \u0432\u043a\u043b\u044e\u0447\u0430\u044e\u0442:\n<\/p>\n \nThe USB-7855R can be used to develop deterministic sensor simulation interfaces.\n<\/p>\n \nFPGA logic can generate or process signals representing:\n<\/p>\n \nActual sensor simulation capability depends on the electrical requirements of the target interface and may require additional external signal conditioning.\n<\/p>\n \nDirect FPGA access to digital I\/O allows engineers to implement application-specific communication protocols.\n<\/p>\n \nTypical applications can include:\n<\/p>\n \nThe USB-7855R can execute control algorithms directly on its Kintex-7 FPGA.\n<\/p>\n \nA typical closed-loop architecture is:\n<\/p>\n \nSensor \u2192 FPGA Measurement \u2192 Control Algorithm \u2192 Output \u2192 Plant \/ DUT<\/strong>\n<\/p>\n \nThis architecture can provide predictable timing for applications where host-based software control is not sufficiently deterministic.\n<\/p>\n \nThe FPGA can execute multiple independent hardware operations in parallel.\n<\/p>\n \n\u041d\u0430\u043f\u0440\u0438\u043c\u0435\u0440:\n<\/p>\n \nParallel processing is a major advantage of FPGA-based R Series hardware compared with sequential software execution.\n<\/p>\n \nThe programmable FPGA allows trigger conditions to be customized according to the application rather than relying only on standard fixed trigger functions.\n<\/p>\n \nTrigger logic can evaluate:\n<\/p>\n \nThe USB-7855R and USB-7856R belong to the same generation of USB R Series Multifunction RIO devices.\n<\/p>\n \nThe primary selection consideration is the amount of FPGA resources required by the application. The USB-7855R uses a Kintex-7 70T FPGA<\/strong>, while the USB-7856R provides a larger FPGA configuration for more demanding FPGA applications.\n<\/p>\n \nWhen choosing between them, consider:\n<\/p>\n \nThe USB-7855R provides two 68-pin VHDCI I\/O connectors<\/strong>.\n<\/p>\n \nCompatible NI connectivity options include:\n<\/p>\n \nThe exact cable and connector configuration should always be verified before replacing or integrating the device.\n<\/p>\n \nThe USB-7855R supports USB 2.0 Hi-Speed and Full-Speed<\/strong> operation.\n<\/p>\n \nNI specifies support for:\n<\/p>\n \nA Hi-Speed USB connection should be used when maximum acquisition and update performance is required.\n<\/p>\n \nThe USB-7855R requires an external DC power source.\n<\/p>\n \nUse an appropriate power supply that meets the device requirements and applicable safety specifications.\n<\/p>\n \nThe USB-7855R can be customized using the LabVIEW FPGA Module<\/strong>.\n<\/p>\n \nLabVIEW FPGA allows engineers to implement FPGA functionality including:\n<\/p>\n \nWhen maintaining an existing system, verify compatibility between the LabVIEW version, FPGA compilation tools, R Series driver, and USB-7855R hardware before changing the development environment.\n<\/p>\n \nThe USB-7855R is now a legacy R Series device and may be encountered in existing HIL, laboratory, industrial, and automated test systems.\n<\/p>\n \nWhen replacing an existing USB-7855R, verify:\n<\/p>\n \nAn alternative R Series model should not be treated as a drop-in replacement until hardware I\/O, FPGA resources, software, cabling, timing, and application compatibility have been verified.\n<\/p>\n \nBefore selecting the USB-7855R or a replacement R Series device, evaluate:\n<\/p>\n \nThe USB-7855R provides FPGA-based deterministic I\/O for HIL systems used to validate controllers, embedded systems, ECUs, and other electronic control hardware.\n<\/p>\n \nProgrammable FPGA logic can reproduce compatible analog and digital sensor behavior for controller and DUT validation.\n<\/p>\n \nFPGA-controlled I\/O can implement proprietary or application-specific communication protocols that cannot be easily implemented using conventional fixed-function DAQ hardware.\n<\/p>\n \nTime-critical control algorithms can execute directly on the Kintex-7 FPGA for predictable hardware response.\n<\/p>\n \nCustom FPGA logic can coordinate measurement, stimulus, triggering, digital control, and DUT response processing within an automated test system.\n<\/p>\n \nThe external USB form factor and reconfigurable FPGA architecture make the USB-7855R useful for laboratory development, research, and prototype test systems.\n<\/p>\n \nThe NI USB-7855R is an R Series multifunction reconfigurable I\/O device featuring a user-programmable Kintex-7 70T FPGA and up to 1 MS\/s analog input sampling for deterministic measurement and control applications.\n<\/p>\n \nNI documentation commonly refers to the hardware as USB-7855 or USB-7855R. The \u201cR\u201d identifies the device as part of the R Series reconfigurable I\/O family.\n<\/p>\n \nThe USB-7855R uses a Xilinx Kintex-7 70T FPGA<\/strong>.\n<\/p>\n \nThe USB-7855R supports analog input sampling rates up to 1 MS\/s<\/strong>.\n<\/p>\n \nNo. The USB-7855R features a dedicated A\/D converter per analog input channel<\/strong>, enabling independent timing and triggering.\n<\/p>\n \nYes. Its dedicated ADC and FPGA architecture supports multirate sampling for applications requiring different acquisition rates.\n<\/p>\n \nThe USB-7855R architecture supports individual channel triggering, providing greater flexibility than conventional multiplexed DAQ hardware.\n<\/p>\n \nThe device supports USB 2.0 Hi-Speed and Full-Speed<\/strong>. Hi-Speed operation should be used when maximum acquisition and update performance is required.\n<\/p>\n \nYes. The device requires an external power source with an input voltage range of 9 V to 30 V<\/strong>.\n<\/p>\n \nThe USB-7855R is designed for FPGA-based applications developed with compatible NI R Series software and the LabVIEW FPGA Module<\/strong>.\n<\/p>\n \nYes. Hardware-in-the-loop testing is one of the primary applications identified by NI for the USB-7855R.\n<\/p>\n \nYes. Its FPGA-controlled I\/O can be used to implement compatible deterministic sensor simulation interfaces.\n<\/p>\n \nYes. The programmable FPGA allows custom digital protocol logic to be implemented according to application requirements.\n<\/p>\n \nNI lists the SHC68-68-RMIO<\/strong> cable for multifunction I\/O and the SHC68-C68-RDIO2<\/strong> cable for digital I\/O. Compatible connector blocks include SCB-68\/SCB-68A and SCB-68 HSDIO depending on the connection.\n<\/p>\n \nYes. NI currently lists the USB-7855 as no longer available<\/strong>. Existing systems may therefore require replacement hardware, compatible legacy units, repair support, or migration to another R Series platform.\n<\/p>\n \nVerify the FPGA target, existing FPGA bitfile, I\/O requirements, connector pinout, cables, terminal blocks, USB interface, power requirements, LabVIEW and LabVIEW FPGA versions, compilation tools, R Series driver support, operating system compatibility, and deterministic timing requirements before selecting a replacement.\n<\/p>\n \n\u0417\u0435\u043c\u043b\u044f NI USB-7855R R Series Multifunction Reconfigurable I\/O Device<\/strong> combines a Xilinx Kintex-7 70T FPGA, up to 1 MS\/s analog input sampling, dedicated ADCs, independent channel timing and triggering, multirate acquisition, deterministic FPGA processing, and convenient USB connectivity. These capabilities make it well suited for hardware-in-the-loop testing, sensor simulation, custom protocol communication, high-speed control, automated test, research, and FPGA-based measurement systems.<\/p>","protected":false},"excerpt":{"rendered":" Product Introduction The NI USB-7855R, also commonly referenced as USB-7855, is an R Series Multifunction Reconfigurable I\/O (RIO) device designed<\/p>","protected":false},"featured_media":33675,"template":"","meta":{"_acf_changed":false},"product_brand":[18],"product_cat":[674],"product_tag":[],"class_list":["post-34672","product","type-product","status-publish","has-post-thumbnail","product_brand-national-instruments","product_cat-pci-usb","first","instock","shipping-taxable","product-type-simple"],"acf":[],"yoast_head":"\nProduct Overview<\/h3>\n
Key Features<\/h3>\n
Kintex-7 70T FPGA<\/h4>\n
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1 MS\/s Analog Input Sampling<\/h4>\n
Dedicated ADC per Analog Input Channel<\/h4>\n
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Multirate Sampling<\/h4>\n
\nMedium-Speed Acquisition \u2192 Control Signals<\/strong>
\nLow-Speed Acquisition \u2192 System Monitoring<\/strong>\n<\/p>\nIndividual Channel Triggering<\/h4>\n
USB 2.0 Interface<\/h4>\n
External R Series Architecture<\/h4>\n
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Deterministic FPGA Processing<\/h4>\n
Technical Specifications<\/h3>\n
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\n \u041f\u0430\u0440\u0430\u043c\u0435\u0442\u0440<\/th>\n \u0421\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f<\/th>\n<\/tr>\n \n Product Type<\/td>\n R Series Multifunction Reconfigurable I\/O Device<\/td>\n<\/tr>\n \n \u041c\u043e\u0434\u0435\u043b\u044c<\/td>\n USB-7855 \/ USB-7855R<\/td>\n<\/tr>\n \n Manufacturer<\/td>\n \u041d\u0430\u0446\u0438\u043e\u043d\u0430\u043b\u044c\u043d\u044b\u0435 \u0438\u043d\u0441\u0442\u0440\u0443\u043c\u0435\u043d\u0442\u044b<\/td>\n<\/tr>\n \n \u0424\u041f\u0413\u0410<\/td>\n Xilinx Kintex-7 70T<\/td>\n<\/tr>\n \n Maximum Analog Input Sample Rate<\/td>\n 1 MS\/s<\/td>\n<\/tr>\n \n ADC Architecture<\/td>\n Dedicated ADC per Analog Input Channel<\/td>\n<\/tr>\n \n Host Interface<\/td>\n USB 2.0 Hi-Speed \/ Full-Speed<\/td>\n<\/tr>\n \n Data Transfer<\/td>\n DMA, Interrupts and Programmed I\/O<\/td>\n<\/tr>\n \n DMA Channels<\/td>\n 3<\/td>\n<\/tr>\n \n FPGA Programmable<\/td>\n \u0414\u0430<\/td>\n<\/tr>\n \n Multirate Sampling<\/td>\n Supported<\/td>\n<\/tr>\n \n Individual Channel Triggering<\/td>\n Supported<\/td>\n<\/tr>\n \n I\/O Connectors<\/td>\n 2 \u00d7 68-Pin VHDCI<\/td>\n<\/tr>\n \n Input Power<\/td>\n 9 V to 30 V<\/td>\n<\/tr>\n \n Maximum Power<\/td>\n 20 W<\/td>\n<\/tr>\n \n Dimensions<\/td>\n 18.5 cm \u00d7 17.3 cm \u00d7 3.6 cm<\/td>\n<\/tr>\n \n Weight<\/td>\n Approximately 1,000 g<\/td>\n<\/tr>\n \n Primary Programming Environment<\/td>\n LabVIEW FPGA<\/td>\n<\/tr>\n \n Primary Applications<\/td>\n HIL Testing, Sensor Simulation, Custom Protocols, High-Speed Control and Automated Test<\/td>\n<\/tr>\n<\/table>\n How Does the USB-7855R Work?<\/h3>\n
What Is an R Series Multifunction RIO Device?<\/h3>\n
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Why Use FPGA-Based I\/O?<\/h3>\n
Hardware-in-the-Loop Testing<\/h3>\n
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Sensor Simulation<\/h3>\n
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Custom Protocol Communication<\/h3>\n
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High-Speed Control<\/h3>\n
Parallel FPGA Processing<\/h3>\n
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Custom Triggering<\/h3>\n
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USB-7855R vs Conventional USB DAQ<\/h3>\n
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\n \u0424\u0443\u043d\u043a\u0446\u0438\u044f<\/th>\n USB-7855R<\/th>\n Conventional USB DAQ<\/th>\n<\/tr>\n \n User-Programmable FPGA<\/td>\n \u0414\u0430<\/strong><\/td>\n Usually No<\/td>\n<\/tr>\n \n Custom Hardware Timing<\/td>\n \u0414\u0430<\/strong><\/td>\n Fixed Functions<\/td>\n<\/tr>\n \n Custom Trigger Logic<\/td>\n FPGA Programmable<\/strong><\/td>\n Predefined<\/td>\n<\/tr>\n \n Deterministic Processing<\/td>\n On FPGA<\/strong><\/td>\n Primarily Host-Based<\/td>\n<\/tr>\n \n Multirate Sampling<\/td>\n Supported<\/strong><\/td>\n Device Dependent<\/td>\n<\/tr>\n \n Individual Channel Triggering<\/td>\n Supported<\/strong><\/td>\n Usually Limited<\/td>\n<\/tr>\n \n Custom Protocols<\/td>\n Supported Through FPGA<\/strong><\/td>\n \u041e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u043d\u044b\u0439<\/td>\n<\/tr>\n \n Typical Application<\/td>\n HIL \/ FPGA Control \/ Simulation<\/td>\n General Data Acquisition<\/td>\n<\/tr>\n<\/table>\n USB-7855R vs USB-7856R<\/h3>\n
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USB-7855R vs PCIe-7856<\/h3>\n
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\n \u0424\u0443\u043d\u043a\u0446\u0438\u044f<\/th>\n USB-7855R<\/th>\n PCIe-7856<\/th>\n<\/tr>\n \n Form Factor<\/td>\n External<\/strong><\/td>\n Internal Card<\/td>\n<\/tr>\n \n Host Interface<\/td>\n USB 2.0<\/strong><\/td>\n PCI Express<\/td>\n<\/tr>\n \n FPGA Family<\/td>\n Kintex-7<\/td>\n Kintex-7<\/td>\n<\/tr>\n \n User-Programmable FPGA<\/td>\n \u0414\u0430<\/td>\n \u0414\u0430<\/td>\n<\/tr>\n \n Typical Advantage<\/td>\n Easy External Connectivity<\/td>\n PCI Express System Integration<\/td>\n<\/tr>\n \n Primary Application<\/td>\n FPGA Measurement and Control<\/td>\n FPGA Measurement and Control<\/td>\n<\/tr>\n<\/table>\n USB-7855R Connectivity<\/h3>\n
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USB Interface and Data Transfer<\/h3>\n
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Power Requirements<\/h3>\n
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\n \u041f\u0430\u0440\u0430\u043c\u0435\u0442\u0440<\/th>\n \u0421\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f<\/th>\n<\/tr>\n \n \u0412\u0445\u043e\u0434\u043d\u043e\u0435 \u043d\u0430\u043f\u0440\u044f\u0436\u0435\u043d\u0438\u0435<\/td>\n 9 V to 30 V<\/td>\n<\/tr>\n \n Maximum Power<\/td>\n 20 W<\/td>\n<\/tr>\n \n Overvoltage Protection<\/td>\n 40 V<\/td>\n<\/tr>\n<\/table>\n LabVIEW FPGA Integration<\/h3>\n
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Legacy System Replacement<\/h3>\n
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How to Choose an R Series Device<\/h3>\n
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Industries<\/h3>\n
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Applications<\/h3>\n
Hardware-in-the-Loop Testing<\/h4>\n
Sensor Simulation<\/h4>\n
Custom Protocol Communication<\/h4>\n
High-Speed Control<\/h4>\n
Automated Test<\/h4>\n
Research and Prototyping<\/h4>\n
Recommended Related Products<\/h3>\n
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\n USB-7855R<\/strong><\/td>\n 1 MS\/s USB R Series multifunction reconfigurable I\/O device with Kintex-7 70T FPGA.<\/td>\n<\/tr>\n \n USB-7856R<\/strong><\/td>\n Related USB R Series device with increased FPGA resources for more complex FPGA applications.<\/td>\n<\/tr>\n \n USB-7846R<\/strong><\/td>\n USB R Series multifunction RIO option for FPGA-based measurement, control, and HIL applications.<\/td>\n<\/tr>\n \n PCIe-7856<\/strong><\/td>\n PCI Express R Series multifunction RIO device for systems requiring internal computer integration.<\/td>\n<\/tr>\n \n PXIe-7856<\/strong><\/td>\n PXI Express R Series module for modular automated test, HIL, and synchronized measurement systems.<\/td>\n<\/tr>\n<\/table>\n Why Choose USB-7855R?<\/h3>\n
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Frequently Asked Questions<\/h3>\n
What is the NI USB-7855R?<\/h4>\n
Is USB-7855 the same as USB-7855R?<\/h4>\n
What FPGA does USB-7855R use?<\/h4>\n
What is the maximum sample rate of USB-7855R?<\/h4>\n
Does USB-7855R use multiplexed analog inputs?<\/h4>\n
Does USB-7855R support multirate sampling?<\/h4>\n
Can individual channels use different trigger conditions?<\/h4>\n
What USB interface does USB-7855R use?<\/h4>\n
Does USB-7855R require an external power supply?<\/h4>\n
What software is used with USB-7855R?<\/h4>\n
Can USB-7855R be used for HIL testing?<\/h4>\n
Can USB-7855R be used for sensor simulation?<\/h4>\n
Can USB-7855R implement custom communication protocols?<\/h4>\n
Which cables are compatible with USB-7855R?<\/h4>\n
Is the NI USB-7855R discontinued?<\/h4>\n
What should I check when replacing a USB-7855R?<\/h4>\n
\u0417\u0430\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u0435<\/h3>\n