National Instruments PXI-7853R PXI Multifunction Reconfigurable I/O Module

The PXI-7853R (Part number: 780341-01, 198219B-03L) Multifunction Reconfigurable I/O Module by National Instruments comes equipped with a Virtex-5 LX85 FPGA, a maximum sample rate of 750 kS/s, digital I/O logic levels of 3.3V, 5V, an analog input voltage range of -10 V to 10 V, and does not have any dynamic RAM. There are several ways to reduce the noise and optimize measurement preciseness. These safety measures involve utilizing differential analog input links to discard common-mode noise, directing signals to the instrument cautiously, and utilizing protected, twisted-pair wires to link analog input signals to the instrument. 

The National Instruments PXI-7853R module utilizes the Real-Time System Integration or RTSI bus to simply harmonize a few measurement functions to a shared trigger or timing occurrence. This Multifunction Reconfigurable I/O Module accesses the RTSI bus via the PXI trigger lines applied on the PXI backplane. The user can also use LabVIEW logic and processing in the FPGA on the PXI-7853R RIO Module. Common logic functions are basic mathematical operations, comparisons, and Boolean operations. As an added benefit, numerous functions can be applied in one design.

A valuable feature of the PXI-7853R is the capability for the user to construct unique measurements with the fixed I/O resources. One application might entail an event counter that increments when a rising edge appears on one of the three digital input lines, while a different application might involve a digital line to be asserted after an analog input surpasses a certain value. The user can apply these settings in the module for quick, versatile performance for a variety of applications.

PXI-7853R Mature Status has been announced by National Instruments, but the module will still be available for purchase and repairs by Apex Waves.