05-03-2013 10:03 AM - edited 05-03-2013 10:04 AM
So I have this TRD SH1000 BD Incremental Encoder which I am trying to connect to the NI 9411. Can I connect it with differential type terminal configuration?
http://www.automationdirect.com/static/specs/encoderld.pdf
This is the manual for reference.
05-06-2013 02:00 AM - edited 05-06-2013 02:27 AM
According to the manual (page 3/13), there are no differential outputs on the open collector version. Am I missing something ?
05-06-2013 06:34 AM
Open-collector outputs and differential outputs are different things....
Since you have open-collector outputs on your encoders only (never heard of encoders having both), you should connect them in single-ended configuration to your DAC board. To work properly with an open-collector output, the inputs of the DAC board must have pull-up resistors. In most cases these resistors are already on-board, check the manual of your DAC board for details.
The wiring between your encoder and the board should not be too long since single-ended inputs and non-differential signal lines are prone to environmental noise. If possible, use shielded cables with the shield connected to digital input ground (DGND) on the DAC board.
05-06-2013 06:39 AM - edited 05-06-2013 06:40 AM
Buechsenschuetz a écrit :
Open-collector outputs and differential outputs are different things....
Since you have open-collector outputs on your encoders only (never heard of encoders having both), you should connect them in single-ended configuration to your DAC board. To work properly with an open-collector output, the inputs of the DAC board must have pull-up resistors. In most cases these resistors are already on-board, check the manual of your DAC board for details.
The wiring between your encoder and the board should not be too long since single-ended inputs and non-differential signal lines are prone to environmental noise. If possible, use shielded cables with the shield connected to digital input ground (DGND) on the DAC board.
I guess you mean DAQ board...