ABB IMASI02 Analog Input Module The Analog Slave Input module (IMASI02) is an interface that supplies fifteen separate process field signals into the Infi 90 Process Management System. These analog inputs are used by the Multi-Function Processor Module (MFP) to monitor andcontrol a process. The slave can also send operating commands it receives from the MFP or the Smart Transmitter Terminal (STT) to Bailey Controls smart transmitters.