The Yokogawa SB401-10 is a Signal Conditioner or Signal Converter. It is a modular, single-channel unit designed to be mounted on a DIN rail inside a control panel or system cabinet.
Its primary function is to electrically isolate and convert a standard analog signal. It accepts a 4 to 20 mA DC input signal from a field device (e.g., a pressure or temperature transmitter), processes it, and produces a corresponding 1 to 5 V DC output signal for receiving devices like PLCs, DCSs, or recorders
