Description

Product Overview

The IMASI03 is a versatile 16‑channel universal analog input slave module for ABB Bailey INFI 90 and Harmony Symphony DCS. It supports mixed signal types on the same card: thermocouple, 3‑wire RTD, millivolt, high‑level voltage and 4–20 mA, with per‑channel independent configuration. It features programmable A/D resolution from 16 up to 24 bits, automatic cold‑junction compensation for thermocouples, lead‑wire resistance compensation and open‑circuit detection. It communicates over the slave bus to MFP multifunction controllers. It requires paired termination assemblies NTAI06 / NIAI05. Its Symphony Plus replacement is SPASI03. It is widely stocked for temperature, pressure and flow measurement in power, chemical, pulp & paper and refinery plants.

Technical Specifications

• Brand: ABB Bailey
• Model: IMASI03
• Warranty: One Year
• Condition: 100% New & Original
• Channels: 16 isolated analog input channels, mixed-type configurable
• Supported Inputs: 4–20 mA, voltage, millivolt, 3‑wire RTD, multiple thermocouple types (E, J, K, R, S, T, N, U, L)
• A/D Resolution: 16–24 bit, software selectable per channel
• Special Functions: Cold junction compensation, lead resistance compensation, open input fault detection, auto recalibration
• Backplane Supply: +5 V, ±15 VDC from IEMMU rack
• Operating Temp: -25°C to +60°C
• Communication: INFI 90 slave bus to IMMFP / MFC controllers
• Matching Termination: NTAI06, NIAI05
• Differentiation:
  • IMASI02: older universal AI
  • IMFEC12: only high-level conventional 4–20mA / voltage
  • IMFEC11: high-level + FSK smart transmitter
  • SPASI03: Symphony Plus successor
• Mounting: Standard Harmony rack single slot
• Hot Swap: Supported
• Diagnostics: Front LEDs for power, bus and module faults, per-channel fault flagging
• Weight: Approx. 0.52 kg
• Origin: Sweden
• Certifications: CE, UL
• Lifecycle: Obsolete legacy spare