System for converting input/output signals where each amplifier section comprises a storage unit containing information items relating to an associated terminal end

An input and output signal converter system of a mixed type which receives signals representing physical quantities from a plurality of sensor terminal ends for detecting physical quantities in a plant, and conducts a necessary correction for the signals to send the signals to a host computer, and which transmits signals from the host computer to operation terminal ends in the plant, wherein, the signal converter system comprises

• a sensor terminal end amplifier section including a processing unit for receiving a signal from the sensor terminal end, conducting a predetermined amplifying operation for the signal and outputting the signal to a connecting unit, and a storage unit in which information items related to the sensor terminal end and the processing unit are stored;
• an operation terminal end amplifier section including a converting unit for converting signals from the connecting unit into predetermined control signals which can be received by the operation terminal end and a storage unit in which information items related to the operation terminal end and the converting unit are stored;
• and
• a signal converting section including the connecting unit adapted to be connected to the sensor terminal end amplifier section and the operation terminal end amplifier section, and a signal processing unit connected to the connecting unit for conducting signal processing to communicate with the host computer.