Controlling Stepper Motors with Opto

Hello. Does anyone know if Opto offers any sort of high speed counter module, or any other sort of output module which could be used to control stepper motors? Thanks!

They hide those in a strange place - Look under the serial modules:

http://www.opto22.com/site/pr_details.aspx?cid=1&item=SNAP-SCM-ST2

Got it! Thanks for your help!