ABB IMASI03 Symphony Infi 90 Analog Input Slave Module

The ABB IMASI03, also cataloged as the IMASI-03 Analog Input Slave Module, operates as a dedicated hardware component for digitizing analog field signals and routing process data to primary processing units within ABB Bailey Symphony Infi 90 DCS platforms.

Hardware Specifications

Backplane Bus Communication Velocity & Channel-to-Channel Isolation

The ABB IMASI03 routes digitized sensor data across the slave expander bus directly to the primary Multi-Function Processor module. Integrated A/D conversion circuitry allows high-resolution signal quantization up to 24 bits. Channel-to-channel isolation coupled with open-input detection protects upstream backplane bus communication velocity and logic processing circuits from field ground loops or broken sensor wire faults.

Frequently Asked Questions

Q: How does the IMASI03 module interface with the main system controller?

A: The module connects via its rear P2 edge connector to the slave expander bus, transmitting digitized analog input data directly to host processors such as the IMMFP01, IMMFP02, or IMMFP03.

Q: What physical inputs are required for measuring thermocouple and RTD temperature sensors?

A: Field wiring connects through the P3 connector to external termination units or modules, supporting various thermocouple types and 3-wire RTD configurations with automatic software linearisation.

Q: How is the hardware address assigned on the module mounting rack?

A: Module slave addressing is set manually using on-board DIP switches located directly on the single PCB prior to inserting the card into the Module Mounting Unit.

Field Installation Guidelines

• Verify that the Module Mounting Unit power supply is de-energized or follow system-specific hot-swap safety protocols before inserting the card into its designated rack slot.
• Set the module DIP switch addressing and jumper configurations strictly according to system loop drawings prior to physical slot installation.
• Route field input wiring through proper termination cables connected to P3, maintaining separate conduit channels for 4-20 mA current loops and low-level thermocouple/mV signals to minimize inductive coupling.
• Connect all shield drain wires to the system cabinet earth ground bus at a single point to maintain signal integrity and prevent ground loop interference.