Peter, >From the perspective of the m5i20, etc. they do not need to be isolated. The actual BCD inputs are 24V, so I have to go through relays anyway. Thus TTL (5V or 3.3) as on the m5i20 will work fine.
Regards, Eric > Do the outputs need to be isolated or would a simple SPI-TTL > I/O card do? (I'm planning a simple low cost SPI to 48 TTL > I/O card) Five of these cards would connect to a > 5I20/5I22/5I23 FPGA card (50 pin flat cable spilt into five > 10 pin cables). I may isolate the SPI interface, but the > individual I/O bits would not be isolated from each other ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
