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- Model: ACX631
- Brand: Honeywell / Cherokee International
- Series: UCN / TDC 3000
- Core Function: Supplies regulated power to UCN process-control equipment
- Type: AC/DC Power Supply Module
- Key Specs: 115–240 VAC input; 20 A / 550 W listing; 50/60 Hz operation
Product Introduction
Honeywell ACX631 is an industrial power-supply unit associated with Honeywell UCN process-control equipment and TDC 3000 installations. Available technical records identify it with part number 51198947-100 and classify it as a UCN PM power supply.
The published electrical data identifies 115–240 VAC input, 50/60 Hz operation, and a 550 W / 20 A rating in supplier records. Another technical listing describes the supply as accepting a wider 85–264 VAC line range and supporting 48 VDC battery operation, with battery charging and a low-level AC synchronization output. Because these details vary by revision, the nameplate and applicable Honeywell documentation should be treated as the final authority.
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Model | ACX631 |
| Associated Part Number | 51198947-100 |
| Manufacturer | Honeywell / Cherokee International |
| Product Type | UCN PM Power Supply |
| System Application | Honeywell UCN / TDC 3000 |
| AC Input | 115–240 VAC |
| Reported Line Range | 85–264 VAC, revision dependent |
| Frequency | 50/60 Hz |
| Published Power Rating | 550 W |
| Published Current Rating | 20 A |
| Battery Input | 48 VDC, configuration dependent |
| DC Output | Approx. 24–25 VDC, configuration dependent |
| Auxiliary AC Output | Approx. 6 VAC / 35 mA |
| Mounting | Honeywell UCN equipment cabinet |
| Weight | Approx. 3.6 kg in supplier records |
The 48 VDC battery function is particularly important in installations using the associated UPS/DC-backup arrangement. One supplier specification reports approximately 25.25 VDC at 10 A from AC input and 24.25 VDC from a 48 V battery source.
HONEYWELL ACX631
Application and Selection Notes
ACX631 is primarily relevant to legacy Honeywell UCN and TDC 3000 process-control cabinets. It is a power component, not an I/O or controller module.
That distinction matters during procurement. A visually similar Honeywell power module may have a different output arrangement or cabinet interface. The associated 51198947-100 identification is therefore useful when cross-checking maintenance records.
The unit has also been reported as discontinued by the manufacturer, so this is now mainly a legacy-spares procurement item.
Replacement Pitfalls
Input range: Do not rely only on “115–240 VAC.” Some records describe an 85–264 VAC operating range, indicating that revision-specific documentation matters.
Battery operation: If the cabinet uses 48 VDC backup, confirm that the replacement has the required battery interface and charging function.
Output rating: Check the actual cabinet load before replacement. A nominal 550 W rating should not be treated as proof that every connected load is acceptable.
Part-number revision: ACX631 units appear with different revision markings. Photograph the complete label before ordering.
Legacy equipment: Do not substitute a modern power supply merely because its voltage looks similar. Cabinet wiring, connectors, protection functions, and battery circuitry may differ.
Personally, I would check the ACX631 revision and 51198947-100 identifier first. For old UCN cabinets, that simple comparison can prevent an expensive cabinet-level compatibility problem.
Quality Inspection and Testing
- Inbound inspection: Verify model, part number, revision, serial number, connectors, terminals, casing, and signs of overheating or previous repair.
- Live test: Power the unit from a controlled AC source and verify startup, output voltage, status indications, and abnormal noise.
- Load test: Apply a suitable controlled load and monitor output voltage, current, and temperature rise.
- Battery-side test: Where applicable, verify the 48 VDC input and charging-related functions under controlled conditions.
- Electrical testing: Check grounding continuity, insulation condition, and applicable protection functions.
- Final QC: Record measurements, photograph the unit, protect connectors, and package the power supply securely.
Test reports, photographs, or test video can be provided when available.
Warranty and Availability
Condition: Confirm whether the unit is New Original (New Surplus), used, or refurbished.
Availability: ACX631 is reported as discontinued, so physical warehouse stock and exact revision should be confirmed before purchase.
Lead Time: Subject to stock, inspection, packaging, and export processing.
Warranty: Supplier warranty applies according to the agreed commercial terms.
The HONEYWELL ACX631 should be purchased as a revision-specific legacy UCN power supply. For international procurement, verify the complete part number, revision, AC input range, DC output, battery interface, cabinet compatibility, condition, country of origin, and export documentation before shipment.
