Analog output number on NI-7342

[Galbrun]

Hello,

I have a question about the motion control card NI-7342 that I will purchase soon, in replacement of a broken motion control card (SB214PC).

I will have to make new wires, and I am currently trying to find the correspondance between the I/O of the old cards and the I/O of the NI card. Thats quite difficult for me since I am not an expert in the field of motion control, but I manage as I can with the various documentations. I have been quite puzzled with a particular issue though :

I understand that the command port I must use to control the servo drive are the "analog outputs" n° 29, 30, 63 and 64. Do I have to configure which one serve for which axe in the software, or are any of these two analog output dedicated to the two controlled axis ?

(hoping my question can be understood by any superior intellect roaming nearby...)

[Galbrun]

Oh, and another questions just showed up :

- I am using a brushless servo drive.
- I have no documentation at all about the motor (and no hope to ever get any), and I dont know if it is relevant.
- The present motion control card has two I/O for each of the encoder signal channel (index, phase A, phase B), that is, it uses differential I/O.
- NI motion control card has only single-ended encoded signals.

My natural reaction is to think that NI products are always awesome, and I will connect Index+, phaseA+ and phaseB+ to Index, phaseA and phaseB of the NI motion control card, and I will leave Index-, PhaseA- and PhaseB- to the ground, and it will work juste fine.

Still, I have some kind of doubt. Should I do something else ?