ABB IMDSI22 is a legacy universal digital input module for Bailey INFI 90 and Harmony Rack installed-base systems. ABB documents 16 input points and support for 24 VDC, 48 VDC, 125 VDC, and 120 VAC field signals.
- Function: Universal digital input module
- Input points: 16
- DC input classes: 24 VDC, 48 VDC, 125 VDC
- AC input class: 120 VAC
The module acquires discrete field states for controller logic, alarm, permissive, status, and sequence processing. Exact thresholds, filter times, isolation groupings, and field-current values remain HOLD because those details were not established from an exact ABB-hosted IMDSI22 instruction in this review. ABB's Harmony evolution table maps IMDSI22 to the HR Series SPDSI22. ABB's current catalog separately maps DSI22 applications to DI06e, but DI06e specifications are successor data and must not be presented as legacy IMDSI22 ratings. Any replacement must verify channel voltage selection, termination hardware, cable, dipshunt, polarity, commons, controller addressing, alarm sense, and fail-safe logic. Every used point should be simulated and checked end to end before production release.
Important Notice: Confirm IMDSI22 rather than SPDSI22, IMDSI12/13/14, or IMDSM05.
Apter Power IMDSI22 Manuals and Guides
Important Notice: The first link is the product-parameters PDF prepared only from the cited manufacturer information; the second link is the Apter Power product manual. Confirm the physical nameplate, current manufacturer documents, and host-system requirements before installation or replacement.
Equipment status monitoring
Reads run, stopped, ready, and fault contacts at a documented input voltage.
Alarm and trip acquisition
Brings discrete alarm or trip states into controller logic after project-specific safety review.
Permissive and interlock input
Acquires external permissives and interlocks used by approved sequence logic.
Legacy I/O modernization
Supports controlled evolution to SPDSI22 or the current DI06e platform after exact wiring and configuration review.
Read and follow the current ABB documentation and host-equipment instructions before work. Verify the complete physical nameplate and system configuration.
1
Identify the exact input voltage class on every channel before connecting field power.
2
Do not mix AC and DC field wiring or voltage classes without the exact ABB/project-approved arrangement.
3
Back up point assignments, inversion, alarm sense, filtering, sequence logic, and revision records.
4
Verify termination unit, cable, dipshunt, polarity, commons, slot, and address from approved drawings.
5
Follow ABB and site isolation, ESD, insertion/removal, and commissioning procedures.
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