The Yokogawa SSB401-13 S1 is a Signal Conditioner from the SSB series of DIN-rail mounted instruments. It is specifically designed as a Dual-Channel Isolator and Converter.
Its primary function is to accept two independent 4 to 20 mA DC analog input signals from field transmitters, provide electrical isolation, and convert each input into a corresponding 1 to 5 V DC output signal. This conversion is essential for interfacing with control system hardware (like some PLC or DCS cards) that require voltage inputs instead of current inputs.
