The “plug-in” migration approach enables this DCS upgrade to be accomplished without having to replace existing field wiring, termination assemblies, system enclosures or power supplies. The old APACS input/output (I/O) modules are replaced with new I/A Series I/O modules specially designed to plug right into the existing system racks. Thus, with proper upfront planning, database conversion, and off-line testing, the actual system switchover can be accomplished in hours, with minimal, if any, costly process downtime, says the vendor.
Foxboro Automaton unit, Invensys Process Systems
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