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The 2557 is a high-speed 16-channel isolated RTD input module designed to be compatible with the 2500 Series® I/O base. The 2557 translates millivolt level signals from the RTD element into a scaled temperature value. IMPORTANT NOTE: 2557 HAS BEEN MATURED. IT IS REPLACED BY 2557-A, WHICH SHOULD BE USED ON ALL NEW DESIGNS.
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