ABB IMASM03 is an INFI 90 analog slave input module for eight RTD measurements. It operates under an IMAMM03 analog master and is distinct from the master module and from other IMASM slave variants.
- Product type: RTD analog slave input module
- Input channels: 8
- Documented sensor wiring: Three-wire RTD
- Documented nominal RTD: 100 ohm
The documented input arrangement accepts up to eight three-wire 100-ohm RTDs through NIAI03 termination-module wiring; NTAI04 is documented as an alternative RTD termination-unit arrangement. The exact sensor curve, range, wiring, and project scaling must be confirmed from the installed configuration. IMASM03 acquires the field resistance signals and transfers channel data and status over the slave expander bus to IMAMM03, where the configured analog strategy performs engineering conversion, alarms, exception reporting, and related processing. Typical installations use IMASM03 with an IMAMM03 master, NIAI03 or NTAI04 field termination, and NIAC03 when the approved maintenance procedure requires RTD input calibration. It is suited to multi-point temperature measurement in process, utility, and power-plant control systems using the installed INFI 90 analog architecture.
Important Notice: Verify the exact IMASM03 nameplate/revision and its existing backend records before any create action.
Apter Power IMASM03 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.
Process temperature acquisitionCollects eight RTD temperature points for the IMAMM03 analog strategy.
Turbine and auxiliary temperature monitoringInterfaces approved three-wire RTDs used on plant auxiliaries and process equipment.
Utility and power-plant temperature groupsProvides grouped RTD inputs in installed INFI 90 analog I/O cabinets.
Multi-point equipment thermal monitoringFeeds eight resistance-temperature channels to configured alarms, trends, and operator displays through the master.
Read and follow the exact ABB documentation and host-equipment instructions before work. Verify the complete physical nameplate and system configuration.
1Verify the exact IMASM03 nameplate, revision, and backend duplicate status before creation or editing.
2Back up IMAMM03 channel assignments, RTD type/curve, range, scaling, alarms, and exception settings before service.
3Confirm NIAI03 versus NTAI04, cable, channel numbering, three-wire lead compensation, shield, grounding, and polarity from approved drawings.
4Do not connect current, voltage, or thermocouple signals to an IMASM03 RTD channel.
5Use NIAC03 only according to the official calibration procedure and preserve calibration records.
6Loop-check all used RTDs after replacement and verify open/short diagnostics, engineering units, alarm limits, and trend direction.
7Do not treat PIMASM03, YIMASM03, NASM03, or other IMASM variants as exact aliases or automatic substitutes.
8Keep lifecycle, origin, HS code, dimensions, weight, and replacement claims on HOLD without exact official evidence.
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