National Instruments PXI-7841

The National Instruments PXI-7841 is a sophisticated Multifunction Reconfigurable I/O Module designed to enhance performance and flexibility in automated control and measurement applications. Featuring a Virtex-5 LX30 FPGA, this module offers substantial computational capabilities with 19,200 flip-flops, 32 multipliers, and 1,152 kbits of embedded block RAM. The PXI-7841 includes eight 16-bit analog input channels capable of a maximum sampling rate of 200 kS/s per channel and eight corresponding analog output channels that can update at 1 MS/s per channel. It supports three software-selectable input modes: Differential (DIFF), Referenced Single-Ended (RSE), and Non-Referenced Single-Ended (NRSE), with an input impedance of 10 GΩ coupled with 100 pF when powered on.

For enhanced versatility, the PXI-7841 operates with DC coupling and features a maximum working voltage of ±10 V, ensuring inputs remain within ±12 V of ground. The module demonstrates a bandwidth of 1 MHz for small signals and 500 kHz for large signals, while ensuring safety standards are met with an allowable channel-to-channel working voltage of ±24 V. The configuration includes 96 digital I/O lines and connectivity through three 68-pin female VHDCI connectors, promoting high-density interfacing options.

This module adheres to recognized EMC standards for laboratory use and is intended for indoor operation, making it easy to maintain with simple cleaning procedures using a non-metallic brush. The PXI-7841, designated as reaching Mature Status by National Instruments, continues to be available for purchase and repair services through Apex Waves. Power requirements include +3.3 VDC, +5 VDC, 12 VDC, and -12 VDC at specified current levels, while overvoltage protection is rated at ±42 V when powered on and ±35 V when powered off. The PXI-7841 measures 6.3 inches by 3.9 inches and weighs 0.34 lb, making it a robust choice for integrating advanced automation capabilities into your control systems.