\n| Primary Applications<\/td>\n | FPGA-Based Control, HIL, Custom I\/O, Automated Test and Prototyping<\/td>\n<\/tr>\n<\/table>\nHow Does the PCIe-7841R Work?<\/h3>\n\nThe PCIe-7841R combines analog and digital I\/O with a programmable FPGA positioned directly in the I\/O data path.\n<\/p>\n \nA simplified architecture is:\n<\/p>\n \nExternal I\/O \u2192 ADC \/ DAC \/ Digital I\/O \u2192 Virtex-5 FPGA \u2192 PCI Express \u2192 Host Computer<\/strong>\n<\/p>\n\nInstead of requiring every I\/O operation to be controlled directly by host software, the FPGA can execute custom logic independently.\n<\/p>\n \nFor example, the FPGA can acquire an analog signal, compare it with a programmed threshold, evaluate digital conditions, and change an output according to custom logic without waiting for the host operating system to process each individual operation.\n<\/p>\n What Is Reconfigurable I\/O?<\/h3>\n\nReconfigurable I\/O allows engineers to define hardware behavior using programmable FPGA logic rather than relying only on fixed-function DAQ hardware.\n<\/p>\n \nThis gives the PCIe-7841R substantially more flexibility for specialized measurement and control applications.\n<\/p>\n \n\u0418\u043d\u0436\u0435\u043d\u0435\u0440\u044b \u043c\u043e\u0433\u0443\u0442 \u0440\u0435\u0430\u043b\u0438\u0437\u043e\u0432\u0430\u0442\u044c:\n<\/p>\n \n- Application-specific timing<\/li>\n
- Custom triggering architectures<\/li>\n
- Hardware state machines<\/li>\n
- Parallel processing<\/li>\n
- Digital protocols<\/li>\n
- Custom PWM generation<\/li>\n
- Specialized counters<\/li>\n
- High-speed control logic<\/li>\n
- Signal processing algorithms<\/li>\n<\/ul>\n
FPGA-Based Processing<\/h3>\n\nTraditional PC software runs under an operating system that can introduce timing variability. FPGA logic executes directly in hardware and can provide deterministic behavior for time-critical operations.\n<\/p>\n \nThis makes the PCIe-7841R useful when an application requires predictable timing between an input event and an output response.\n<\/p>\n Parallel Processing<\/h3>\n\nAn FPGA does not operate in the same sequential manner as a conventional CPU. Multiple hardware operations can execute in parallel.\n<\/p>\n \nFor example, a PCIe-7841R FPGA application can simultaneously:\n<\/p>\n \n- Acquire multiple analog channels<\/li>\n
- Generate analog outputs<\/li>\n
- Monitor digital inputs<\/li>\n
- Generate digital outputs<\/li>\n
- Process encoder signals<\/li>\n
- Evaluate trigger conditions<\/li>\n
- Execute control logic<\/li>\n<\/ul>\n
\nThis parallelism is one of the major advantages of FPGA-based R Series hardware.\n<\/p>\n Analog Input Architecture<\/h3>\n\nThe PCIe-7841R provides eight 16-bit analog input channels with sampling rates up to 200 kS\/s per channel.\n<\/p>\n \nThe device supports software-selectable analog input modes including:\n<\/p>\n \n- Differential (DIFF)<\/li>\n
- Referenced Single-Ended (RSE)<\/li>\n
- Nonreferenced Single-Ended (NRSE)<\/li>\n<\/ul>\n
\nThe selected configuration should be based on signal grounding, noise, common-mode voltage, and overall measurement requirements.\n<\/p>\n Simultaneous Analog Acquisition<\/h3>\n\nThe analog input architecture allows multiple signals to be acquired while maintaining their timing relationship.\n<\/p>\n \nThis is important in applications such as:\n<\/p>\n \n- Multichannel control<\/li>\n
- Power electronics testing<\/li>\n
- Motor control<\/li>\n
- \u0421\u0438\u043c\u0443\u043b\u044f\u0446\u0438\u044f \u0441 \u0430\u043f\u043f\u0430\u0440\u0430\u0442\u043d\u044b\u043c \u0432\u0445\u043e\u0434\u043e\u043c<\/li>\n
- Dynamic system testing<\/li>\n
- Electronic validation<\/li>\n<\/ul>\n
Analog Output Applications<\/h3>\n\nThe eight analog outputs allow the PCIe-7841R to generate programmable signals directly under FPGA control.\n<\/p>\n \nA typical closed-loop architecture is:\n<\/p>\n \nAnalog Input \u2192 FPGA Control Algorithm \u2192 Analog Output \u2192 Device \/ Plant \u2192 Analog Input<\/strong>\n<\/p>\n\nThis architecture can be used for deterministic control and simulation applications.\n<\/p>\n Digital I\/O Applications<\/h3>\n\nThe 96 digital I\/O lines provide extensive resources for custom digital interfacing.\n<\/p>\n \nBecause digital behavior can be defined in FPGA logic, the PCIe-7841R can implement functionality beyond simple static digital input and output.\n<\/p>\n \nApplications can include:\n<\/p>\n \n- Custom serial interfaces<\/li>\n
- Digital protocol emulation<\/li>\n
- Hardware handshaking<\/li>\n
- Encoder decoding<\/li>\n
- \u0413\u0435\u043d\u0435\u0440\u0430\u0446\u0438\u044f \u0428\u0418\u041c<\/li>\n
- \u0418\u0437\u043c\u0435\u0440\u0435\u043d\u0438\u0435 \u043f\u0443\u043b\u044c\u0441\u0430<\/li>\n
- Digital pattern generation<\/li>\n
- Custom trigger routing<\/li>\n<\/ul>\n
Hardware-in-the-Loop Testing<\/h3>\n\nThe PCIe-7841R can be used in hardware-in-the-loop (HIL)<\/strong> and real-time simulation architectures where deterministic I\/O behavior is required.\n<\/p>\n\nThe FPGA can implement custom signal processing and I\/O interfaces between the test system and the device under test.\n<\/p>\n \nTypical HIL applications can include:\n<\/p>\n \n- Electronic control unit testing<\/li>\n
- Embedded controller validation<\/li>\n
- Motor controller testing<\/li>\n
- Power electronics validation<\/li>\n
- Custom control-system simulation<\/li>\n<\/ul>\n
Closed-Loop Control<\/h3>\n\nThe combination of analog inputs, analog outputs, digital I\/O, and FPGA processing allows the PCIe-7841R to implement custom closed-loop control systems.\n<\/p>\n \nThe FPGA can acquire feedback signals, execute a control algorithm, and update outputs with deterministic hardware timing.\n<\/p>\n Rapid Control Prototyping<\/h3>\n\nThe PCIe-7841R can be used for rapid control prototyping when engineers need to develop and validate control algorithms before implementing dedicated production hardware.\n<\/p>\n \nFPGA-based processing provides flexibility for testing different control strategies, timing architectures, and custom interfaces.\n<\/p>\n Custom Triggering<\/h3>\n\nOne advantage of reconfigurable FPGA hardware is the ability to create application-specific trigger logic.\n<\/p>\n \nInstead of relying only on predefined trigger functions, engineers can combine multiple conditions such as:\n<\/p>\n \n- Analog thresholds<\/li>\n
- Digital states<\/li>\n
- Timing conditions<\/li>\n
- Counter values<\/li>\n
- Sequence states<\/li>\n
- External events<\/li>\n<\/ul>\n
\nThese conditions can be evaluated directly in FPGA hardware.\n<\/p>\n Custom Digital Protocols<\/h3>\n\nThe PCIe-7841R can be used to implement certain custom digital communication interfaces in FPGA logic.\n<\/p>\n \nThis capability can be valuable when working with proprietary devices, specialized sensors, legacy hardware, or interfaces not supported by conventional fixed-function instrumentation.\n<\/p>\n \u0410\u0432\u0442\u043e\u043c\u0430\u0442\u0438\u0437\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0435 \u0438\u0441\u043f\u044b\u0442\u0430\u0442\u0435\u043b\u044c\u043d\u044b\u0435 \u0441\u0438\u0441\u0442\u0435\u043c\u044b<\/h3>\n\nThe PCIe-7841R can provide deterministic measurement and control functionality within automated test equipment.\n<\/p>\n \nA typical test sequence can include:\n<\/p>\n \n- Initialize the FPGA application.<\/li>\n
- Configure test parameters.<\/li>\n
- Generate analog and digital stimulus.<\/li>\n
- Acquire analog measurements.<\/li>\n
- Monitor digital responses.<\/li>\n
- Perform FPGA-based processing.<\/li>\n
- Evaluate hardware trigger conditions.<\/li>\n
- Transfer measurement results to the host.<\/li>\n
- Store and analyze test data.<\/li>\n<\/ol>\n
PCIe-7841R vs PCIe-7842R<\/h3>\n\nThe PCIe-7841R and PCIe-7842R provide closely related analog and digital I\/O architectures. A major difference is the FPGA capacity.\n<\/p>\n \n\n| \u0424\u0443\u043d\u043a\u0446\u0438\u044f<\/th>\n | PCIe-7841R<\/th>\n | PCIe-7842R<\/th>\n<\/tr>\n | \n| \u0428\u0438\u043d\u043d\u044b\u0439 \u0438\u043d\u0442\u0435\u0440\u0444\u0435\u0439\u0441<\/td>\n | PCI Express<\/td>\n | PCI Express<\/td>\n<\/tr>\n | \n| \u0424\u041f\u0413\u0410<\/td>\n | Virtex-5 LX30<\/strong><\/td>\nVirtex-5 LX50<\/strong><\/td>\n<\/tr>\n\n| Analog Inputs<\/td>\n | 8<\/td>\n | 8<\/td>\n<\/tr>\n | \n| AI Resolution<\/td>\n | 16-Bit<\/td>\n | 16-Bit<\/td>\n<\/tr>\n | \n| Maximum AI Rate<\/td>\n | 200 kS\/s\/ch<\/td>\n | 200 kS\/s\/ch<\/td>\n<\/tr>\n | \n| Analog Outputs<\/td>\n | 8<\/td>\n | 8<\/td>\n<\/tr>\n | \n| \u0426\u0438\u0444\u0440\u043e\u0432\u043e\u0439 \u0432\u0432\u043e\u0434-\u0432\u044b\u0432\u043e\u0434<\/td>\n | 96<\/td>\n | 96<\/td>\n<\/tr>\n | \n| Primary Difference<\/td>\n | Smaller FPGA<\/td>\n | Larger FPGA<\/strong><\/td>\n<\/tr>\n<\/table>\n \nThe PCIe-7842R should be considered when the FPGA application requires additional logic resources. The PCIe-7841R can be appropriate when the Virtex-5 LX30 provides sufficient resources for the required FPGA design.\n<\/p>\n PCIe-7841R vs PCIe-7851R<\/h3>\n\nThe PCIe-7841R and PCIe-7851R both use a Virtex-5 LX30 FPGA, but their analog acquisition performance differs.\n<\/p>\n \n\n| \u0424\u0443\u043d\u043a\u0446\u0438\u044f<\/th>\n | PCIe-7841R<\/th>\n | PCIe-7851R<\/th>\n<\/tr>\n | \n| \u0424\u041f\u0413\u0410<\/td>\n | Virtex-5 LX30<\/td>\n | Virtex-5 LX30<\/td>\n<\/tr>\n | \n| Analog Inputs<\/td>\n | 8<\/td>\n | 8<\/td>\n<\/tr>\n | \n| AI Resolution<\/td>\n | 16-Bit<\/td>\n | 16-Bit<\/td>\n<\/tr>\n | \n| Maximum AI Rate<\/td>\n | 200 kS\/s\/ch<\/strong><\/td>\n750 kS\/s\/ch<\/strong><\/td>\n<\/tr>\n\n| Analog Outputs<\/td>\n | 8<\/td>\n | 8<\/td>\n<\/tr>\n | \n| \u0426\u0438\u0444\u0440\u043e\u0432\u043e\u0439 \u0432\u0432\u043e\u0434-\u0432\u044b\u0432\u043e\u0434<\/td>\n | 96<\/td>\n | 96<\/td>\n<\/tr>\n | \n| Primary Advantage<\/td>\n | General FPGA-Based Multifunction I\/O<\/td>\n | Higher Analog Acquisition Speed<\/strong><\/td>\n<\/tr>\n<\/table>\n \nThe PCIe-7851R is more appropriate when higher analog input sampling performance is required, while the PCIe-7841R can be sufficient for applications requiring up to 200 kS\/s per channel.\n<\/p>\n PCIe-7841R vs PXI-7841R<\/h3>\n\nThe PCIe-7841R and PXI-7841R provide closely related R Series functionality but use different host platforms.\n<\/p>\n \n\n| \u0424\u0443\u043d\u043a\u0446\u0438\u044f<\/th>\n | PCIe-7841R<\/th>\n | PXI-7841R<\/th>\n<\/tr>\n | \n| Platform<\/td>\n | PCI Express<\/strong><\/td>\n| PXI<\/td>\n<\/tr>\n | \n| \u0424\u041f\u0413\u0410<\/td>\n | Virtex-5 LX30<\/td>\n | Virtex-5 LX30<\/td>\n<\/tr>\n | \n| Analog Inputs<\/td>\n | 8<\/td>\n | 8<\/td>\n<\/tr>\n | \n| Analog Outputs<\/td>\n | 8<\/td>\n | 8<\/td>\n<\/tr>\n | \n| \u0426\u0438\u0444\u0440\u043e\u0432\u043e\u0439 \u0432\u0432\u043e\u0434-\u0432\u044b\u0432\u043e\u0434<\/td>\n | 96<\/td>\n | 96<\/td>\n<\/tr>\n | \n| Installation<\/td>\n | PCI Express Computer<\/td>\n | PXI \u0428\u0430\u0441\u0441\u0438<\/td>\n<\/tr>\n | \n| \u0422\u0438\u043f\u0438\u0447\u043d\u043e\u0435 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435<\/td>\n | PC-Based FPGA Systems<\/td>\n | Modular PXI Systems<\/td>\n<\/tr>\n<\/table>\nPCIe-7841R vs Conventional DAQ Devices<\/h3>\n\n\n| \u0424\u0443\u043d\u043a\u0446\u0438\u044f<\/th>\n | PCIe-7841R<\/th>\n | Conventional Multifunction DAQ<\/th>\n<\/tr>\n | \n| User-Programmable FPGA<\/td>\n | \u0414\u0430<\/strong><\/td>\n| Typically No<\/td>\n<\/tr>\n | \n| Custom Hardware Logic<\/td>\n | \u0414\u0430<\/strong><\/td>\n| \u041e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u043d\u044b\u0439<\/td>\n<\/tr>\n | \n| Deterministic I\/O Processing<\/td>\n | FPGA-Based<\/strong><\/td>\n| Primarily Fixed Hardware \/ Driver-Based<\/td>\n<\/tr>\n | \n| Analog Input<\/td>\n | \u0414\u0430<\/td>\n | \u0414\u0430<\/td>\n<\/tr>\n | \n| Analog Output<\/td>\n | \u0414\u0430<\/td>\n | Model Dependent<\/td>\n<\/tr>\n | \n| \u0426\u0438\u0444\u0440\u043e\u0432\u043e\u0439 \u0432\u0432\u043e\u0434-\u0432\u044b\u0432\u043e\u0434<\/td>\n | 96 Lines<\/strong><\/td>\n| Model Dependent<\/td>\n<\/tr>\n | \n| Custom Protocols<\/td>\n | Can Be FPGA Implemented<\/strong><\/td>\n| \u041e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u043d\u044b\u0439<\/td>\n<\/tr>\n | \n| Primary Strength<\/td>\n | Reconfigurable Hardware<\/td>\n | General Data Acquisition<\/td>\n<\/tr>\n<\/table>\n68-Pin VHDCI Connectivity<\/h3>\n\nThe PCIe-7841R provides three 68-pin female high-density VHDCI connectors<\/strong>.\n<\/p>\n\nNI identifies compatible accessory options for the PCIe-7841R including:\n<\/p>\n \n- SHC68-68-RMIO cable<\/li>\n
- SHC68-68-RDIO cable<\/li>\n
- SHC68-NT-S unterminated cable<\/li>\n
- SCB-68 terminal block<\/li>\n
- SCB-68A terminal block<\/li>\n<\/ul>\n
\nCable and terminal block selection should be based on the specific connector, signal type, pinout, and application requirements.\n<\/p>\n NI 9151 Expansion<\/h3>\n\nThe digital I\/O architecture of the PCIe-7841R can also be used with compatible NI expansion hardware such as the NI 9151 R Series Expansion Chassis.\n<\/p>\n \nThis architecture can provide access to compatible C Series I\/O modules for applications requiring additional signal conditioning or specialized sensor interfaces.\n<\/p>\n FPGA Programming<\/h3>\n\nThe PCIe-7841R is designed for applications in which engineers customize the onboard FPGA according to their measurement and control requirements.\n<\/p>\n \nTypical FPGA application development can include:\n<\/p>\n \n- Defining FPGA I\/O operations<\/li>\n
- Creating deterministic loops<\/li>\n
- Implementing hardware logic<\/li>\n
- Building state machines<\/li>\n
- Developing custom triggers<\/li>\n
- Performing fixed-point calculations<\/li>\n
- Creating custom digital interfaces<\/li>\n
- Implementing hardware-level safety logic<\/li>\n<\/ul>\n
LabVIEW FPGA Applications<\/h3>\n\nThe PCIe-7841R is commonly associated with FPGA-based application development using the NI R Series software architecture and compatible LabVIEW FPGA development environments.\n<\/p>\n \nA typical application architecture is:\n<\/p>\n \nHost Application \u2194 FPGA Interface \u2194 FPGA VI \u2194 Analog \/ Digital I\/O<\/strong>\n<\/p>\n\nThe FPGA executes time-critical hardware operations while the host application can perform user-interface functions, data storage, high-level analysis, configuration, and communication with other instruments.\n<\/p>\n Legacy System Replacement<\/h3>\n\nThe PCIe-7841R is also relevant for maintenance and replacement of existing R Series test and control systems.\n<\/p>\n \nWhen replacing an existing PCIe-7841R, verify:\n<\/p>\n \n- PCI Express slot compatibility<\/li>\n
- FPGA bitfile compatibility<\/li>\n
- Existing FPGA application<\/li>\n
- Host software version<\/li>\n
- R Series driver compatibility<\/li>\n
- LabVIEW FPGA version<\/li>\n
- Existing VHDCI cables<\/li>\n
- Terminal block compatibility<\/li>\n
- I\/O pin assignments<\/li>\n
- Analog input configuration<\/li>\n
- Analog output requirements<\/li>\n
- Digital I\/O configuration<\/li>\n<\/ul>\n
\nFor an existing FPGA system, software and FPGA compatibility can be just as important as the basic electrical specifications of the replacement hardware.\n<\/p>\n How to Choose an R Series RIO Device<\/h3>\n\nBefore selecting the PCIe-7841R, evaluate:\n<\/p>\n \n- Required FPGA capacity<\/li>\n
- Analog input channel count<\/li>\n
- Analog input resolution<\/li>\n
- Required sampling rate per channel<\/li>\n
- Analog output requirements<\/li>\n
- Digital I\/O channel count<\/li>\n
- Custom timing requirements<\/li>\n
- Custom protocol requirements<\/li>\n
- Control-loop requirements<\/li>\n
- PCI Express slot compatibility<\/li>\n
- VHDCI cable requirements<\/li>\n
- Terminal block requirements<\/li>\n
- FPGA development software compatibility<\/li>\n
- Existing FPGA code or bitfile compatibility<\/li>\n<\/ul>\n
Industries<\/h3>\n\n- Automated Test<\/li>\n
- Industrial Control<\/li>\n
- Hardware-in-the-Loop Testing<\/li>\n
- Automotive Test<\/li>\n
- \u0410\u044d\u0440\u043e\u043a\u043e\u0441\u043c\u0438\u0447\u0435\u0441\u043a\u0430\u044f \u0438 \u043e\u0431\u043e\u0440\u043e\u043d\u043d\u0430\u044f \u043f\u0440\u043e\u043c\u044b\u0448\u043b\u0435\u043d\u043d\u043e\u0441\u0442\u044c<\/li>\n
- Power Electronics<\/li>\n
- Motor and Drive Testing<\/li>\n
- Electronic Validation<\/li>\n
- Research and Development<\/li>\n
- Rapid Control Prototyping<\/li>\n<\/ul>\n
Applications<\/h3>\nHardware-in-the-Loop Testing<\/h4>\n\nThe FPGA architecture can provide deterministic I\/O processing for compatible HIL test and simulation systems.\n<\/p>\n Custom Control Systems<\/h4>\n\nAnalog inputs, analog outputs, digital I\/O, and FPGA processing can be combined to implement custom deterministic control architectures.\n<\/p>\n Rapid Control Prototyping<\/h4>\n\nEngineers can use the PCIe-7841R to prototype FPGA-based control algorithms and custom hardware interfaces before implementing dedicated production hardware.\n<\/p>\n Custom Digital Interfaces<\/h4>\n\nThe 96 digital I\/O lines and programmable FPGA can be used to implement application-specific digital communication, timing, triggering, and control interfaces.\n<\/p>\n Automated Test<\/h4>\n\nThe PCIe-7841R can provide custom measurement, stimulus, triggering, digital control, and deterministic processing functionality in automated test systems.\n<\/p>\n Power Electronics and Motor Control<\/h4>\n\nSimultaneous analog acquisition, analog generation, digital I\/O, and FPGA processing make the PCIe-7841R useful for compatible power electronics, motor control, and electromechanical test applications.\n<\/p>\n Recommended Related Products<\/h3>\n\n\nPCIe-7841R<\/strong><\/td>\n| Virtex-5 LX30 FPGA-based multifunction RIO device with 8 AI, 8 AO, and 96 DIO.<\/td>\n<\/tr>\n | \nPCIe-7842R<\/strong><\/td>\n| Related R Series multifunction RIO device with a larger Virtex-5 LX50 FPGA.<\/td>\n<\/tr>\n | \nPCIe-7851R<\/strong><\/td>\n| Virtex-5 LX30 R Series device offering higher analog input sampling performance.<\/td>\n<\/tr>\n | \nPCIe-7852R<\/strong><\/td>\n| Higher-performance R Series option combining faster analog acquisition with a larger FPGA.<\/td>\n<\/tr>\n | \nPXI-7841R<\/strong><\/td>\n| PXI form-factor version for modular FPGA-based test and measurement systems.<\/td>\n<\/tr>\n | \nPXIe-7846R<\/strong><\/td>\nNewer-generation PXI Express R Series architecture for FPGA-based measurement and control applications.<\/td>\n<\/tr>\n<\/table>\nWhy Choose PCIe-7841R?<\/h3>\n\n- User-programmable FPGA architecture<\/li>\n
- Xilinx Virtex-5 LX30 FPGA<\/li>\n
- 8 \u0430\u043d\u0430\u043b\u043e\u0433\u043e\u0432\u044b\u0445 \u0432\u0445\u043e\u0434\u043d\u044b\u0445 \u043a\u0430\u043d\u0430\u043b\u043e\u0432<\/li>\n
- 16-bit analog input resolution<\/li>\n
- Up to 200 kS\/s per channel analog input<\/li>\n
- 8 \u0430\u043d\u0430\u043b\u043e\u0433\u043e\u0432\u044b\u0445 \u0432\u044b\u0445\u043e\u0434\u043d\u044b\u0445 \u043a\u0430\u043d\u0430\u043b\u043e\u0432<\/li>\n
- 16-bit analog output resolution<\/li>\n
- 96 \u0446\u0438\u0444\u0440\u043e\u0432\u044b\u0445 \u0432\u0445\u043e\u0434\u043e\u0432\/\u0432\u044b\u0445\u043e\u0434\u043e\u0432<\/li>\n
- TTL digital compatibility<\/li>\n
- PCI Express interface<\/li>\n
- Three 68-pin VHDCI connectors<\/li>\n
- \u041d\u0430\u0441\u0442\u0440\u043e\u0439\u043a\u0430 \u0432\u0440\u0435\u043c\u0435\u043d\u0438 \u0430\u043f\u043f\u0430\u0440\u0430\u0442\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f<\/li>\n
- Deterministic FPGA processing<\/li>\n
- Suitable for HIL testing<\/li>\n
- Suitable for custom control<\/li>\n
- Suitable for automated test<\/li>\n<\/ul>\n
Frequently Asked Questions<\/h3>\nWhat is the NI PCIe-7841R?<\/h4>\n\nThe NI PCIe-7841R is an R Series multifunction reconfigurable I\/O device that combines analog input, analog output, digital I\/O, and a user-programmable FPGA on a PCI Express platform.\n<\/p>\n What FPGA does PCIe-7841R use?<\/h4>\n\nThe PCIe-7841R uses a Xilinx Virtex-5 LX30 FPGA<\/strong>.\n<\/p>\nHow many analog inputs does PCIe-7841R have?<\/h4>\n\nThe PCIe-7841R provides 8 \u0430\u043d\u0430\u043b\u043e\u0433\u043e\u0432\u044b\u0445 \u0432\u0445\u043e\u0434\u043d\u044b\u0445 \u043a\u0430\u043d\u0430\u043b\u043e\u0432<\/strong>.\n<\/p>\nWhat is the analog input resolution?<\/h4>\n\nThe PCIe-7841R provides 16-bit analog input resolution<\/strong>.\n<\/p>\nWhat is the maximum analog input sampling rate?<\/h4>\n\nThe PCIe-7841R supports analog input sampling rates up to 200 \u0442\u044b\u0441. \u043e\u0442\u0441\u0447\u0435\u0442\u043e\u0432\/\u0441 \u043d\u0430 \u043a\u0430\u043d\u0430\u043b<\/strong>.\n<\/p>\nDoes PCIe-7841R support simultaneous analog input?<\/h4>\n\nYes. Its analog input architecture supports simultaneous acquisition, which is useful for preserving timing relationships between multiple measured signals.\n<\/p>\n How many analog outputs does PCIe-7841R have?<\/h4>\n\nThe PCIe-7841R provides 8 \u0430\u043d\u0430\u043b\u043e\u0433\u043e\u0432\u044b\u0445 \u0432\u044b\u0445\u043e\u0434\u043d\u044b\u0445 \u043a\u0430\u043d\u0430\u043b\u043e\u0432<\/strong> with 16-bit resolution.\n<\/p>\nHow many digital I\/O lines does PCIe-7841R provide?<\/h4>\n\nThe PCIe-7841R provides 96 \u0446\u0438\u0444\u0440\u043e\u0432\u044b\u0445 \u0432\u0445\u043e\u0434\u043e\u0432\/\u0432\u044b\u0445\u043e\u0434\u043e\u0432<\/strong>.\n<\/p>\nWhat connectors does PCIe-7841R use?<\/h4>\n\nThe PCIe-7841R provides three 68-pin female high-density VHDCI connectors<\/strong>.\n<\/p>\nWhat cables are compatible with PCIe-7841R?<\/h4>\n\nNI lists accessories including the SHC68-68-RMIO, SHC68-68-RDIO, and SHC68-NT-S<\/strong> cables for this R Series architecture. The exact cable should be selected according to the connector and I\/O signals being used.\n<\/p>\nWhat terminal blocks can be used with PCIe-7841R?<\/h4>\n\nCompatible configurations include SCB-68 and SCB-68A<\/strong> connector blocks. Always verify the correct R Series pinout before wiring signals.\n<\/p>\nWhat is the difference between PCIe-7841R and PCIe-7842R?<\/h4>\n\nBoth models provide closely related I\/O capabilities, but the PCIe-7841R uses a Virtex-5 LX30 FPGA while the PCIe-7842R uses the larger Virtex-5 LX50 FPGA. The PCIe-7842R is therefore better suited to FPGA applications requiring additional logic resources.\n<\/p>\n What is the difference between PCIe-7841R and PCIe-7851R?<\/h4>\n\nBoth use a Virtex-5 LX30 FPGA and provide similar multifunction I\/O architecture. A major difference is analog acquisition speed: the PCIe-7841R supports up to 200 kS\/s per channel, while the PCIe-7851R provides higher analog input sampling performance.\n<\/p>\n What is the difference between PCIe-7841R and PXI-7841R?<\/h4>\n\nThe primary difference is the host platform. PCIe-7841R installs in a PCI Express computer, while PXI-7841R is designed for a PXI chassis.\n<\/p>\n Can PCIe-7841R be used for HIL testing?<\/h4>\n\nYes. Its user-programmable FPGA, analog I\/O, and extensive digital I\/O make it suitable for compatible hardware-in-the-loop testing and real-time I\/O applications.\n<\/p>\n Can PCIe-7841R implement custom digital protocols?<\/h4>\n\nYes. The FPGA and reconfigurable digital I\/O architecture can be used to implement application-specific digital timing and protocol logic, subject to the electrical and timing capabilities of the hardware.\n<\/p>\n Can PCIe-7841R be used for closed-loop control?<\/h4>\n\nYes. The FPGA can acquire input signals, execute custom control logic, and update outputs with deterministic hardware timing, making the device suitable for compatible closed-loop control applications.\n<\/p>\n What should I check before purchasing a PCIe-7841R?<\/h4>\n\nVerify the FPGA resource requirements, 8 AI and 8 AO configuration, 200 kS\/s per-channel analog input rate, 96 DIO requirement, PCI Express compatibility, VHDCI cabling, terminal blocks, FPGA software environment, driver compatibility, operating system, existing FPGA bitfiles, and application source code.\n<\/p>\n \u0417\u0430\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u0435<\/h3>\n\n\u0417\u0435\u043c\u043b\u044f NI PCIe-7841R R Series Multifunction Reconfigurable I\/O Device<\/strong> combines a Xilinx Virtex-5 LX30 FPGA with eight 16-bit analog inputs, eight 16-bit analog outputs, 96 digital I\/O lines, and a PCI Express host interface. Its FPGA-based architecture provides deterministic timing, parallel processing, custom triggering, and reconfigurable hardware logic for HIL testing, rapid control prototyping, custom digital interfaces, automated testing, electronic validation, and advanced measurement and control systems.<\/p>","protected":false},"excerpt":{"rendered":"\u041c\u0430\u043a\u0441\u0438\u043c\u0430\u043b\u044c\u043d\u0430\u044f \u0447\u0430\u0441\u0442\u043e\u0442\u0430 \u0434\u0438\u0441\u043a\u0440\u0435\u0442\u0438\u0437\u0430\u0446\u0438\u0438: 200 \u043a\u0412\u044b\u0431\/\u0441
\n\u0428\u0438\u043d\u0430: PCI Express
\nMaximum Clock Rate: 40 MHz
\n\u041a\u043e\u043b\u0438\u0447\u0435\u0441\u0442\u0432\u043e \u0434\u0432\u0443\u043d\u0430\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u043d\u044b\u0445 \u0446\u0438\u0444\u0440\u043e\u0432\u044b\u0445 \u043a\u0430\u043d\u0430\u043b\u043e\u0432: 96
\n\u0426\u0438\u0444\u0440\u043e\u0432\u044b\u0435 \u0443\u0440\u043e\u0432\u043d\u0438 \u0432\u0432\u043e\u0434\u0430-\u0432\u044b\u0432\u043e\u0434\u0430: 3,3 \u0412, 5 \u0412
\nFPGA: Virtex-5 LX30
\n\u0414\u0438\u0430\u043f\u0430\u0437\u043e\u043d \u0432\u0445\u043e\u0434\u043d\u043e\u0433\u043e \u0430\u043d\u0430\u043b\u043e\u0433\u043e\u0432\u043e\u0433\u043e \u043d\u0430\u043f\u0440\u044f\u0436\u0435\u043d\u0438\u044f: \u043e\u0442 -10 \u0412 \u0434\u043e 10 \u0412
\nEnclosed: No
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