problem regarding VCC and ground of quadrature encode in connecting to NI6229

[Student_of_sfu]

Hi

I really need help. I have a quadrature encoder and a NI 6229.  After doing the settings in labview . it shows me 3 pins for A, B and Z. but what about the A-, B- and Z-? also what about gound and VCC? Should I have another power supply(not the DAQ itself) to connect to  vcc and ground of encoder?

[Paul-D]

It sounds like you are usingg a differential encoder.  How Do I Use a Quadrature Encoder with My Data Acquisition Board? explains, "A differential quadrature encoder has 5 signals instead of 3. There are A, A Inverse, B, B Inverse and a Z index channels. Unfortunately most of our data acquisition boards (E-Series, M-Series, X-Series, and TIO) do not support differential encoder measurements. We can, however, use these differential encoders in the same way we would use a single ended quadrature encoder. You can connect just the A, B and Z index channels to the Source, AUX and GATE pins on your counter. You can also make the same connections with the A inverse, B inverse and Z channels".

If you'd like more information about quadrature encoders, I'd also recommend you check out our Connect Quadrature Encoders to a DAQ Device tutorial for more info on making the connections.

In regards to Vcc and Gnd, you can get this from your DAQ board, as long as your device needs a +5V input, and doesn't pull more than 1-2A, depending on which 6229 you have.

Also, to get more attention to your posts, I would recommend future postings go in our Multifunction DAQ board, as your posted to a LabVIEW board.