Description
Foxboro IPM2-P0904HA – I/A Series Industrial Power Module
Product Overview
The Foxboro IPM2-P0904HA is an I/A Series industrial power module used to provide regulated DC power within Foxboro process-control equipment. Available technical and manufacturer-related references identify it as a Lambda power supply with selectable 100, 120, 220, or 240 VAC input and a nominal 39 VDC output. The unit includes front-panel status indication for monitoring operating condition. It is intended for cabinet and system-level power conversion rather than direct field signal processing, making it an important lifecycle spare for legacy Foxboro DCS installations. Current listings also identify P0904HA as an alternate designation for the same power module.
Technical Specifications — IPM2-P0904HA
| Parameter | Value |
|---|---|
| Product Model | IPM2-P0904HA |
| Manufacturer | Foxboro / Invensys |
| Product Type | I/A Series Industrial Power Module |
| Input Voltage | 100 / 120 / 220 / 240 VAC, selectable |
| Output Voltage | 39 VDC nominal |
| Input Current | Approx. 0.4 A at 240 VAC, listing-dependent |
| Status Indication | LED indicators |
| Communication / Protocol | Not applicable |
| Mounting | I/A Series equipment / cabinet installation |
| Dimensions (HxWxD) | Approx. 64 × 109 × 279 mm, source-dependent |
| Weight | Approx. 2.3 kg unit weight; supplier listings vary |
| Operating Temperature | Verify exact revision and system documentation |
| Typical Application | Foxboro I/A Series DCS power distribution |
Foxboro-related references consistently identify the selectable AC input and 39 VDC output. Physical dimensions and weight vary between supplier listings, so these values should be treated as procurement estimates rather than certified mechanical specifications.

Foxboro IPM2-P0904HA
Key Features and Benefits — IPM2-P0904HA
- Selectable 100/120/220/240 VAC input supports multiple plant power configurations.
- Provides nominal 39 VDC output for compatible Foxboro I/A Series equipment.
- Built-in status LEDs simplify basic power-status checks.
- Designed for legacy DCS power-supply applications.
- Useful as a direct lifecycle spare where the installed cabinet remains based on the original I/A architecture.
- The P0904HA designation is also used as an alternate reference, which can help with spare-parts identification.
Personally, I would confirm the voltage-selection setting and output specification from the existing nameplate before energizing a replacement. This is a power-conversion module, so an incorrect input selector can cause immediate equipment damage.
Related Models
Foxboro P0904HA — Alternate part-number designation for the same power-module family and commonly used in surplus and repair inventories.
Foxboro IPM-P0904HA — Earlier or differently designated I/A Series power-module reference associated with similar power-conversion applications.
Foxboro I/A Series Power Modules — Related legacy power supplies used to provide regulated power within Foxboro control-system cabinets.
Foxboro FBM Series Modules — DCS I/O and interface modules that depend on the appropriate system power architecture but are not direct substitutes for this power supply.
Installation and Maintenance — IPM2-P0904HA
Before replacement, isolate the incoming AC supply and verify the selected input-voltage position on the module. Record the existing wiring, mounting location, grounding arrangement, and output connections before removal.
Inspect terminals, cooling paths, insulation, and status indicators for evidence of overheating or deterioration. Verify the 39 VDC output with suitable test equipment before connecting sensitive control-system loads. Personally, I would check the complete cabinet power budget as well, rather than assuming the replacement can support every connected load simply because the voltage matches.
Product Warranty — IPM2-P0904HA
Warranty coverage depends on supplier, condition, testing status, and purchase agreement. Used or refurbished units should preferably include functional-test information and clear identification of the hardware revision. The Foxboro IPM2-P0904HA should be matched to the existing I/A Series power architecture and verified for the correct AC input selection before commissioning.
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