ABB IMASI03 is an INFI 90 Universal Analog Input Slave Module designed to acquire up to 16 field inputs. ABB's exact module instruction identifies current, high-level voltage, millivolt, thermocouple, and three-wire RTD capabilities, making the module a legacy mixed-signal interface within the slave I/O architecture.
- Input channels: Up to 16
- Selectable conversion resolution: 16 through 24 bits
- Current input: 4-20 mA
- High-level voltage span: Documented high-level input within -10 to +10 VDC
The instruction describes programmable conversion resolution from 16 through 24 bits, channel isolation, and open-input detection. Supported input families include 4-20 mA, high-level voltage within the documented span, millivolt ranges, multiple thermocouple types, and several RTD characteristics; exact channel settings must come from the ABB manual and the installed configuration. IMASI03 communicates with ABB IMMFP01, IMMFP02, or IMMFP03 multifunction processors over the slave expander bus. ABB documents either an NTAI06 termination unit or two NIAI05 termination modules for field connection, so rack drawings and cable assignments must determine which topology is actually installed. ABB's IMASI13 instruction provides a later replacement procedure for IMASI03 and warns of modifications, while current Symphony Plus evolution material maps ASI03/13/23 functions to AI16e. These relationships do not prove identical hardware, and no merge is allowed. Formal lifecycle, origin, customs code, weight, and dimensions remain HOLD.
Important Notice: Verify the complete ABB IMASI03 nameplate and current project documentation before use.
Apter Power IMASI03 Manuals and Guides
Important Notice: The first link is the model-specific product-parameters PDF prepared only from the cited ABB official evidence; the second link is the Apter Power product information manual. Confirm the physical nameplate, current ABB documents, and host-system requirements before installation or replacement.
Legacy process-transmitter inputsAcquire engineered 4-20 mA transmitter loops in an installed INFI 90 slave I/O system.
Thermocouple and RTD monitoringMeasure supported temperature sensors with the documented sensor characteristic, wiring, and compensation configuration.
Voltage and millivolt acquisitionDigitize supported high-level or low-level voltage signals after isolation, grounding, and range review.
Controlled legacy migrationUse ABB's IMASI03-to-IMASI13 procedure or ASI evolution mapping as an engineering basis for a planned upgrade.
Read and follow the exact ABB documentation and host-equipment instructions before work. Verify the complete physical nameplate and system configuration.
1Verify exact IMASI03 identity, assembly revision, multifunction processor, rack slot, and slave address before work.
2Back up all channel types, ranges, resolution, scaling, alarm, calibration, and controller configuration values.
3Confirm whether field wiring uses NTAI06 or two NIAI05 modules; do not mix termination topologies.
4Check loop polarity, sensor curve, thermocouple extension wire, RTD lead arrangement, grounding, shielding, and isolation.
5Use ABB electrostatic-discharge controls and approved powered-equipment service procedures with process safeguards in place.
6Apply every ABB modification required when replacing IMASI03 with IMASI13; never treat the change as a blind drop-in.
7Perform channel-by-channel loop, open-input diagnostic, and engineering-unit validation after service.
8Keep YIMASI03, IMASI13, and AI16e as service or successor search terms, not aliases that overwrite IMASI03 identity.
9Do not publish formal lifecycle, origin, HS code, weight, or dimensions without exact ABB evidence.
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