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Help CenterABB Bailey IMCIS02 Control I/O Slave Module – Remote I/O Expansion for INFI 90 / Network 90 Systems
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The ABB Bailey IMCIS02 is a Control I/O Slave module designed to extend I/O capacity on INFI 90 / Network 90 DCS platforms with stable, deterministic communications. It pairs with an IMCIM0x Control I/O Master to connect remote I/O racks, which typically helps reduce long home-run field wiring and makes phased plant expansions more practical.
Control I/O link (Master–Slave pairing) – Works with an IMCIM-series Control I/O Master to bridge processor-level control to remote I/O racks.
Deterministic scan behavior – Cyclic data exchange for predictable updates of digital and analog points; helpful for tight loop timing.
Remote I/O expansion – Typically used to add new I/O cabinets without touching the main controller rack, saving engineering time.
Status and diagnostics – Front-panel indicators (power/link/activity) make it easier to spot link health or module faults at a glance.
Redundancy option – In many cases, can be deployed as part of a redundant I/O communication path to improve availability.
Backplane powered – Draws power from the ABB Bailey I/O rack; no external power supply to wire.
Compatible form factor – Standard INFI 90 module construction for straightforward cabinet integration and serviceability.
| Brand / Model | ABB Bailey IMCIS02 (Control I/O Slave Module) |
| Power Requirements | Powered by the ABB Bailey I/O rack backplane (no separate external supply required) |
| Operating Temperature | Control-room environment (typically 0–55°C), dependent on cabinet ventilation and loading |
| Signal I/O Types | Communication gateway to backplane I/O; no direct field terminations on this module |
| Communication Interfaces | Control I/O link to IMCIM-series Master; backplane interface to ABB Bailey I/O modules |
| Installation Method | Plugs into standard ABB Bailey I/O rack slot; front-panel retention with keyed alignment |
| Form Factor | Standard INFI 90 module format for use in ABB Bailey cabinet/rack systems |
From my experience, the IMCIS02 shows up wherever plants need reliable remote I/O—especially when a main processor rack is already fully populated. You might notice that it’s commonly used in:
Power generation (boiler islands, balance-of-plant I/O cabinets, retrofit turbine auxiliaries)
Oil & gas and petrochemical (remote MCC integration, compressor stations, tank farms)
Chemicals and pharmaceuticals (distributed skids and utilities where local marshalling is preferred)
Pulp & paper (wet end/dry end expansions without pulling long new home-run cables)
Water & wastewater (remote process areas and pump stations within plant boundaries)
Lower wiring costs – Remote I/O means shorter field runs, fewer terminations, and reduced labor.
Predictable performance – Deterministic link behavior suits control loops and alarm handling.
Smooth expansions – Typically allows phased cabinet additions without major controller downtime.
Lifecycle-friendly – Fits the INFI 90 ecosystem, so spares, tools, and procedures stay consistent.
Redundancy options – High-availability architectures are easier when the I/O link can be duplicated.
A maintenance supervisor at a combined-cycle site told us they swapped in IMCIS02 units during a cabinet refresh and immediately saw fewer nuisance comms alarms; it seems the diagnostic LEDs made troubleshooting link grounding issues more straightforward.
Installation & MaintenanceCabinet and environment – Use an ABB Bailey-compatible I/O rack with good ventilation. Keep within a clean, control-room environment when possible.
Grounding and shielding – Properly bond cabinet ground and maintain shield continuity on the Control I/O link; in most cases, this eliminates intermittent link errors.
Wiring practices – Route communication cabling away from high-voltage and high-frequency drives; maintain bend radius and connector integrity.
Redundancy planning – If deploying redundant paths, match cable types and lengths and keep modules at the same firmware revision.
Routine checks – Periodically verify front-panel indicators, tighten terminal/connector hardware, and review system logs for retries or link degradation.
Firmware alignment – Keep IMCIS02 firmware coordinated with the paired IMCIM Master revision to avoid compatibility quirks.
Hot-swap caution – Follow site MOC and lockout procedures; many INFI 90 modules support on-line replacement, but confirm with plant standards before pulling a card live.
Certifications – Typically compliant with industrial control equipment standards such as CE; UL and RoHS applicability may depend on production lot and region.
Manufacturing quality – Built to ABB Bailey DCS hardware standards for installed-base compatibility and long service life.
Warranty – Standard manufacturer warranty terms apply (often 12 months); extended programs are available through authorized channels.
If you’re planning an I/O expansion or a selective upgrade of legacy remote I/O links, the IMCIS02 is a practical, field-proven choice that keeps your INFI 90 system architecture consistent without overcomplicating the job.
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