Use the 7i96s card to control a single axis +/- 10volt servo motor.

I already tried that and it damaged my 7i96S, I think it's very risky. The best is the solution that PWC recommends, that's how I did it and I have no problems controlling sevos with drivers that use +-10 for their control. The only thing you need to use is firmware where you replace the STEP DIR with outputs for PWM and DIR.

Thank you very much for your input, I appreciate your advice. I have the following mesa cards: 5i25T + 7i77 in a fiber laser cutter still in development, 7i80hdt in a cnc router, 7i93 +7i33ta, this configuration was the first time used a mesa card Hurco km3p knee mill and the last one is the 7i96s. The thing is that each card is in a machine and the only one "available" is the 7i96s. I just wanted to see if I could use those cmc drivers in a new project, a plasma retrofit.

Mesa 7i96S + 7i85 + 7i83
That combo does step/dir. analog +-10V, encoders and SSerials, add a 7i84 if you need more IO.

Great just need to add a THCAD2.