National Instruments DAQPad-6508 Digital I/O Device

The DAQPAD-6508 is a Digital I/O Device for computers with USB ports. This device is manufactured by National Instruments and is available with part number 777661-01.  The NI DAQPAD-6508 is controlled by using four 24-bit PPIs (Programmable Peripheral Interfaces). These PPIs are further divided into three 8-bit sub ports. These sub ports have transfer rates up to 60 S/s. This 96-bit digital I/O for USB can be operated in uni-directional as well as bi-directional mode when interacting with the PPIs. This Digital I/O Device finds use in a broad range of applications. The DAQPad-6508 can interface with different devices depending upon the application requirements. Some compatible devices are plotters, I/O modules, terminal panels, and printers.  

This Digital I/O Device has 96 bi-directional 5V static I/O lines with 8-bit ports. The NI DAQPAD-6508 supports both TTL and CMOS. The output signal current is 0.5A maximum at +5 VDC at pin-49 and pin-99. The DAQPAD-6508 has mass termination. The DAQPad-6508 offers a two-wired handshake capability for easy and perfect connectivity without creating any complications. This device requires one port for the handshaking function.

For transferring data, the NI DAQPAD-6508 uses a 100-pin female, 0.050 series D-type connector. The power-up state of the DAQPAD-6508 can be configured manually. The user has the flexibility to select a high or low wake-up state. To achieve this function, a 100 kΩ resistor is connected with each terminal. To use the DAQPAD-6508 with a PC, NI-DAQ software can be utilized. NI-DAQ software is ideal to perform digital I/O and write custom programs. NI-DAQ also has several built-in example programs for different ADEs such as LabVIEW.