got it in the datasheet
questions to ask
what is the function of the VCC at 50 and 100pins
how to generate a voltage from the same banks of ports
There are 8 ports with 8 lines each. The VCC provides a constant +5V as a voltage source/reference for external circuitry. You can find examples using the NI Example Finder in LabVIEW and navigating to Hardware Input and Output->DAQmx->Digital Generation->Write Dig Channel.vi. If you are programming using a text-based language, please refer to the examples by navigating to Windows Start->All Programs->National Instruments->NI-DAQ->Text-Based Code Support.
thanks for the reply
i am still blur for the configuration
what does vcc,comm and gnd means
do we need to input >5v to vcc to get a output com of 5v ?
how this really works.
what will be the connection
i just want to get output voltage frm the 64 pins
More information can be found in the NI 651x User Manual (http://www.ni.com/pdf/manuals/372172b.pdf). Since you are using a sourcing digital output card, the VCC lines should be connected to your voltage source (+5V ~ +30V). Please refer to Figure 4-5, NI 6512 Output Signal Connection Example on page 4-6. You can also use pins 50 or 100 to supply the VCC voltage of +5V. COM(GND) should be connected to the negative terminal or relative ground of your source. Once this setup is connected, asserting or disserting the digital lines will provide either a grounded or VCC voltage.