Reading Angles From a Line Driver Quadrature Encoder

[Justin]

I currently have a Quadrature Encoder (Line Drive) and am trying to interface it with a PCI-6602 Counter/Timer Card. I have currently had no luck in correctly hooking it up and reading the angle. Past experience with Quadrature Encoder have all been open collector; I have been able to to successfully hook up an open collector encoder with the 6602.

Any help in hooking up the Line Driver encoder with the PCI6602 would be appreciated.

Thanks.

[Kevin_Price]

Justin,

Normally, the mfgr. would include a recommended "Line Receiver" interface circuit for the encoder. I've found that some line-driver encoders actually can be successfully connected directly to the 6602 for quick-and-dirty testing, though you wouldn't want to wire that up arbirtrarily or rely on it for the long term. In any event, it sounds like you'll need to add a line receiver interface.

-Kevin P.