Overview
Manuals
Versatile Field Signal Compatibility
More Operating Info
Manufacturer Specifications
Features:
- Built-in 24-bit Analog-to-Digital (A/D) converter architecture yielding a calibrated 16-bit system output
- Scans and updates all 16 channels within 180 milliseconds
- Typically requires 5V DC at 500 mA (750 mA maximum) directly from the backplane line
The ABB IMASI23 (or SPASI23) is a high-performance general-purpose analog input slave module suitable for Symphony Harmony rack-mount I/O systems. This module features 16 freely configurable analog input channels, supporting voltage, current, isolated thermocouple, RTD, and mV signal inputs, and provides 24-bit high-precision A/D conversion. Functionally, all channels have a conversion cycle of only 180ms, strong noise immunity (single-mode ≥ -80dB, common-mode ≥ -120dB), and 250VDC common-mode isolation voltage.
Furthermore, it integrates intelligent diagnostic tools, supporting open-circuit, over-limit, and fault monitoring, and supports hot-swapping for easy and rapid maintenance. Its operating principle is as follows: field sensor signals enter the module via the terminal unit, undergo signal conditioning, and then are converted from analog to digital signals by their respective 24-bit A/D converters. Finally, the onboard microcontroller processes the data and exchanges data in real-time with the main controller via dual-port RAM and I/O expansion bus.
The IMASI23 ABB Analog Input Module may still be available for purchase and support from Moore Automated Company beyond End-Of-Life (EOL) by the manufacturer (OEM).
ABB IMASI23 Isolated Analog Input Module Manuals(Datasheets), Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
The "General Purpose" designation means this card can directly handle various sensor inputs via onboard hardware jumpers and software parameter definitions:
High-level signals: 0 to 5 VDC, 1 to 5 VDC, 0 to 10 VDC, ±10 VDC, and standard 4 to 20 mA current loops.
Thermocouples (TC): Supports B, E, J, K, L, N, R, S, T, and U-type thermocouples. This module integrates native cold junction compensation (CJC) reference switching to automatically eliminate terminal temperature drift errors.
Resistance Temperature Detectors (RTDs): Supports three-wire configurations of 100 Ω platinum resistance (European and US standards), 120 Ω nickel resistance, and 10 Ω or 53 Ω copper resistance.
Low-level millivolt signals: -100 mV to +100 mV and 0 to 100 mV ranges.
This module features a built-in high-resolution analog-to-digital converter (ADC) capable of accurately demodulating, temperature-compensating, and linearizing weak electrical signals in the field, while also possessing strong immunity to common-mode and differential-mode interference. At the control system integration and full lifecycle definition level, the module seamlessly connects to field lines via dedicated terminal units (e.g., NTDI01/NTAI06) and exchanges data in real-time, deterministically high-speed with the central processing unit (module bus) via the INFI-NET bus within the control cabinet. In accordance with ABB's Product Lifecycle Management (PLM) strategy, as a classic and mature model in the Symphony series, this module is currently in the official lifecycle maintenance/spare parts (classic/limited) phase. ABB officially offers original equipment replacement parts, refurbished parts support, and seamless upgrade and technology migration solutions to upgrade to the next-generation Symphony Plus (S+ Operations/S+ Engineering) system, thereby ensuring the long-term stable operation of users' existing assets.
Manufacturer Specifications
- Product role: Isolated analog input module
- Channel family: 16 isolated analog inputs
- Supported signal classes: Current, voltage, millivolt, thermocouple and RTD
- Measurement processing: Channel conversion, calibration and engineering-unit conversion
- System family: Bailey INFI 90 / Harmony Rack
- Evolution options: AI16e or SPASI23 after engineering review
The listed values are taken from the manufacturer documentation for
ABB IMASI23. Confirm the complete order identity and hardware revision before replacement.
