National Instruments 781050-01 PCI Express Multifunction I/O Module

The part number 781050-01 from National Instruments is the identifying part number for the PCIe-6361 PCI Express Multifunction I/O Module. The 781050-01 Module features 16 Analog inputs, 2 Analog Outputs, and 24 Digital Inputs and Outputs. The analog inputs can be configured as 16 single-ended inputs or 8 differential inputs. The ADC resolution of the input is 16 bits, allowing the module to convert the analog voltage with accuracy. The maximum sample rate of each input channel is 2.00 MS/s and approximately 1.00 MS/s when using multichannel. The module has an input voltage range of ±0.1 volts minimum up to ±10 volts maximum. The maximum working voltage for analog inputs (signal + common mode) is 11 volts. 

For data transfer between the module memory and the system memory the 781050-01 uses the Scatter-gather Direct Memory Access (DMA) method allowing for efficient handling of non-contiguous data, enhancing data transfer performance without CPU intervention. For high-speed data transfer, the 781050-01 PCIe Module features a USB bus enabling data transmission between the module and external USB devices. The programmed I/O allows the CPU to control data transfers through direct register or memory access, providing compatibility and flexibility for USB communication operations. Overall, these data transfer methods offer a range of options for efficiently exchanging data with the PCI Express module, catering to diverse application requirements and providing compatibility with different communication interfaces such as PCIe/PXIe and USB.

The 781050-01 PCIe Module features (2) two, 16-bit analog outputs that have a maximum update speed of 2.86 MS/s when using a single channel or 2.00 MS/s when using both channels simultaneously. To ensure minimal signal loss the output impedance of the 781050-01 PCIe Module is 0.2 Ω. To drive the external loads connected to the output the 781050-01 PCIe module can output a maximum current of ±5 mA while the module can withstand overvoltage conditions of up to ±25 V, providing a safety margin against voltage spikes or surges.

The 781050-01 PCIe Module without a disk drive power connector installed requires 4.6 watts of power to operate at 3.3 volts DC or 5.4 watts at 12 volts DC. With a disk drive power connector installed, the module requires 1.6 watts at 3.3 volts DC or 5.4 watts at 12 volts DC.