Mesa 7I37 not operate as step/dir output

Hi!
I connected 7I37TA to 5I20.
Step/Dir output signals passed to 7I37. The problem.
Probably 7I37 is "slow signal" card. I extended the impulse wide from 5000 nS to 50000 nS.
Only after this the impulses appears in 7I37 output. The input 7I37 was OK earlier.
What daughter cards of Mesa I need to use for Step/Dir signals (for PWM I use 7I33)

The 7I37 is a power output card and much too slow for typical step+dir outputs
I would suggest a 7I47 for step+dir especially if your step motor drive has opto isolated inputs
that are not commoned, so they can be driver differentially by the 7I47.
Another option is the 7I42TA (no buffers just a protected breakout)

andypugh wrote:

aike wrote:

What daughter cards of Mesa I need to use for Step/Dir signals (for PWM I use 7I33)

The simplest solution is probably no daughter card at all. I have my stepper drives wired direct to the FPGA card. (There are internal opto-isolators in the drives, which is very common)

Thank you, I did it the same way.
May be no doubt in get 7I47 card.