ABB IMASI13 – Analog Signal Input Module for Bailey INFI 90/Harmony process I/O

The ABB IMASI13 is an analog signal input module designed for Bailey INFI 90/Harmony systems. From my experience, it’s the kind of card plants rely on for stable, low-noise acquisition of process variables—think pressure, temperature, level, and flow coming in as 4–20 mA or voltage. It slots into the standard I/O rack and works through the INFI 90 backplane, so no external comms wiring is needed. You might notice that it pairs with the appropriate I/O termination assembly (IOTA) to define the exact signal type and isolation arrangement; that’s typical for this platform and keeps things flexible.

In many cases, users deploy IMASI13 as a high-reliability, multi-channel AI card where long-term continuity matters—power generation, chemicals, and refining are common. One thing I appreciate is the straightforward status/health reporting back to the controller, which makes troubleshooting field loops a bit less painful during turnarounds.

Order Placement Process and Guarantees

• Warranty: 365 days
• Delivery time: typically 1 week if in stock; no more than 1 month at the latest
• Payment: 50% advance payment; full payment before delivery
• Express delivery options: FedEx, UPS, DHL

Key Features

• Multi-channel analog input – Commonly used for up to 16 channels, ideal for dense process signal acquisition.
• Current and voltage signal support – Typically handles 4–20 mA and 0–10 V via the matching IOTA/termination setup.
• Stable performance in industrial environments – Designed for the INFI 90/Harmony ecosystem with robust backplane comms.
• Health and diagnostics – Module status and per-point quality bits help pinpoint loop or wiring issues.
• Noise mitigation and isolation – Channel-to-backplane isolation and, in many cases, group or per-channel isolation depending on the termination assembly.
• Service-friendly mechanics – Front extraction handle; in most cases field techs can swap it without shutting down the entire cabinet section.

Technical Specifications

Related or Supporting Products

• ABB IMASI02 – Earlier analog input variant; used where legacy channel definitions are retained.
• ABB IMASI23 – High-density AI option in the same family; suitable when more channels per slot are needed.
• ABB IMASO11/IMASO13 – Analog output modules (AO) to pair with AI for closed-loop applications.
• ABB IMDSI14 – Digital input module for discrete sensing alongside analog measurements.
• ABB IMMFP12 – Multi-function processor/controller used within the Harmony/INFI 90 architecture.
• ABB INICT12A – Network interface module when you need plant network connectivity and controller communications.
• Matching IOTA/termination assemblies – Select the IOTA variant that sets 4–20 mA or voltage mode and isolation/grouping as required.

Quick field note from a refinery client: replacing an aging IMASI02 with IMASI13 reduced nuisance noise on long 4–20 mA runs, mainly due to the termination and grounding refresh we did at the same time. The module change was straightforward—engineering checked scaling, we confirmed raw counts, and it was back online quickly.

Installation & Maintenance

• Cabinet & environment – Mount in an ABB INFI 90/Harmony rack with adequate ventilation. Keep ambient within 0–60 °C and avoid high vibration zones where possible.
• Wiring practices – Use twisted, shielded pairs for analog loops. Terminate shields at a single point (cabinet earth) to minimize ground loops. Separate analog and power cabling.
• Signal setup – Choose the correct IOTA/termination for 4–20 mA or 0–10 V. For current loops, verify loop power and any shunt resistors; for voltage inputs, confirm burden and scaling in the controller.
• Safety – De-energize field loops before changing terminations. Observe ESD precautions when handling the module.
• Routine checks – Periodically verify terminal tightness, inspect for corrosion, and compare live readings to a known calibrator (e.g., 4, 12, 20 mA points). Review channel status/quality bits in the engineering tool.
• Firmware & spares – Keep spares matched to your controller’s approved revision. Firmware on these legacy modules is typically stable; change only when ABB guidance indicates.

Quality & Certifications

• Manufacturing quality system: ISO 9001 (ABB production)
• CE marking: EMC and safety conformity applicable to the series
• UL/CSA: typically recognized for the Harmony/INFI 90 family
• RoHS: varies by vintage; many legacy IMASI units predate full RoHS requirements
• Standard warranty provided here: 365 days