Till recently I used I/O modules from Echowell (Advantec), but they are no more available.
So I am looking for a alternative. I tried modules from Opto22, but they seems not as good as the Echowell modules.
When I use a Echowell ODC5 for triggering a flash generator it works well, but when I replace it by a Opto22 ODC5, the flash is triggering once (why?) and sometimes I've got spontaneous triggers.
The Echowell IDC5b modules have a built-in Schmitt-trigger and the Oto22 modules don't.
Does anybody have experience with Echowell modules and have a good alternative?