LEGACY IS EXPERIENCE, and experience is relevance. And boy did I find that out in a hurry. A customer of mine has an IBM computer with a Rockwell 1784-PKTx card running Wonderware 6.0 under Windows NT. They powered it down for some silly reason and blew the power supply. A newer retrofitted power supply was used, but the computer didn't spark up. That made them very nervous since this is the only SCADA node that they had to run their conveyance system.
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