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Key Technical Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Honeywell |
| Part Number | 51198947-100 |
| Catalog Description | Power Supply Process Manager / PM Power Supply |
| Product Type | HPM power supply module |
| System Family | Honeywell TDC 3000 / UCN xPM power system |
| Compatible Controller Families | PM, APM, and HPM equipment cabinets |
| Primary Application | UCN automation-platform power system |
| Input Supply | 115/240 V AC, 50/60 Hz |
| Listed Output | 25 V DC, 10 A load, 550 W |
| xPM System Distribution Output | 24 V DC, rated 20 A when one or both supplies operate |
| Secondary AC Output | 6 V AC from the left/primary supply for LLAI IOP noise reduction |
| CMOS Memory Backup | 3.9 V from rechargeable power-system panel batteries |
| Redundancy | Supports dual power-supply operation with separate dedicated AC sources |
| Status Indicators | DC Out, Battery, Fan/Temp, AC In, and Charging |
| Alternate Part References | Cherokee International ACX631; original Honeywell 51109684-100 |
| Reported Shipping Weight | Approximately 6 kg / 8.99 lb, depending on listing and packing method |
| Recommended Service Life | Replace at approximately 10 years as preventive maintenance |
| Recommended Current Replacement | Honeywell 51198651-100, subject to site compatibility and approved upgrade procedure |
Honeywell’s power-system maintenance document identifies 51198947-100 as the second silver power-supply version, sold from 1997 onward, within the PM/APM/HPM xPM power-system family. It also identifies 51198651-100 as the recommended current power-supply replacement.
Product Introduction
The Honeywell 51198947-100 is a PM/HPM power supply for Honeywell TDC 3000 and UCN automation systems using PM, APM, or HPM equipment cabinets. It converts 115/240 V AC input power into the regulated power required by the xPM power system and supports the power architecture that keeps process-control equipment operating.
This silver-generation supply is commonly retained in legacy HPM installations because it supports redundant power-system arrangements and provides diagnostic indication for AC input, DC output, battery, charger, and fan/temperature conditions. For planned lifecycle work, Honeywell recommends considering the newer 51198651-100 supply and performing replacement during a scheduled outage where possible.
Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to This Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| DC Out LED is off | AC input lost, power switch off, internal supply failure, output outside normal range | ✅ High | Check the AC In LED, then measure approved incoming AC at the supply input using the site wiring diagram and a properly rated meter | Restore incoming AC or replace the failed supply after confirming the upstream circuit |
| AC In LED is off | Upstream breaker open, blown fuse, disconnected feed, failed AC source, supply switch off | ⚠️ Medium | Measure AC voltage at the supply input terminals; inspect feeder breaker, fuses, switch position, and cabinet wiring | Repair the incoming power path before replacing the module |
| Fan/Temp LED is off | Failed cooling fan, blocked airflow, dirty cabinet, excessive ambient temperature, internal thermal fault | ✅ High | Inspect fan operation, air path, filter condition, cabinet temperature, and exhaust clearance; check for abnormal fan noise | Replace the fan or power supply as required; correct cabinet airflow before returning to service |
| Battery LED is off while Charging LED is on | 48 V battery switch off, failed battery backup, discharged battery bank, damaged battery connection | ❌ Usually Low | Check battery switch, battery fuse, terminal condition, battery voltage, and battery-backup alarm status | Test and replace the battery system as needed; do not replace the power supply first |
| Charging LED is off | Failed charging circuit, disconnected battery, failed battery pack, battery wiring fault | ✅ High | Inspect battery connections and fuses, then verify battery voltage and compare both supply indicators | Troubleshoot battery pack first; replace the power supply if the charger circuit is confirmed failed |
| Both DC Out LEDs are off | Loss of both supplies, total AC failure, power-system chassis issue, dual supply failure | ✅ High | Verify independent AC feeds, both supply switches, primary and secondary diagnostic indicators, and system DC bus voltage | Treat as a priority power-system fault; restore redundant supply as soon as safely possible |
| HPM restarts or generates random faults | 24 V DC bus sag, degraded capacitors, intermittent supply, failed fan, weak backup battery | ✅ High | Trend DC output under load, inspect alarms, check fan operation, and review system event history for resets or voltage-related diagnostics | Perform a controlled supply assessment; replace degraded units during an approved outage |
| Power-system alarm contact changes state | AC input, DC output, battery, fan/temperature, or charger alarm | ✅ High | Identify which of the five indicators is off; review corresponding cabinet alarm and power-system diagnostics | Correct the indicated condition rather than replacing the module blindly |
| Failure occurs after replacing one supply in a redundant chassis | Disturbed airflow, debris pulled into active supply, incorrect seating, incompatible version, loose AC connection | ⚠️ Medium | Inspect adjacent supply, airflow path, connector seating, and all LEDs after replacement | Follow the Honeywell xPM service procedure; avoid unnecessary on-process replacement of a working unit |
Honeywell documents five key diagnostic indicators—DC Out, Battery, Fan/Temp, AC In, and Charging—and explains the fault meaning for each. If all indicators are illuminated, the power system is functioning normally.
Field warning: Do not replace this supply just because an HPM reports a power alarm. First identify the failed indication. A Battery LED fault often belongs to the 48 V backup system; an AC In LED fault can be an upstream feeder or breaker problem; and a Fan/Temp fault may be caused by a blocked air path rather than an electrical failure.
❗ Redundant does not mean risk-free: Honeywell recommends a redundant arrangement with each supply fed from its own dedicated power source. Even then, avoid replacing a working power supply while the process is online. Disturbing the power-supply compartment can introduce debris into the airflow path of the operating supply and create a second failure.
❗ Supply version matters: Do not substitute a black 51109456-200 unit for a silver supply. Honeywell documented an overvoltage concern with the older black version and recommends replacement with the current 51198651-100 supply. Confirm chassis compatibility and follow the approved upgrade procedure before changing power-supply generations.
❗ Battery backup is part of the job: The 48 V battery backup supports the fully loaded xPM system for a minimum of 20 minutes under the documented design assumptions. Honeywell advises battery load testing and replacement based on age and capacity; a weak battery can turn a routine power interruption into a control-system outage.
❗ Do not work from memory: Photograph the installed supply position, left/right location, AC source labels, battery leads, power-system indicators, and all alarm wiring before removal. The left/primary supply provides the listed 6 V AC function for LLAI IOP noise reduction, so left-versus-right placement can matter.
❗ ESD and electrical safety: Use approved lockout/tagout procedures, verify absence of hazardous voltage with a properly rated meter, and use ESD controls around UCN/HPM electronics. This is mains-powered equipment. A casual swap can damage the supply, rack, or control system.
Keep these checks in mind and you will save yourself 90% of typical rework time. If the fault remains unclear, send technical support photos of all five LED indicators, the power-system chassis, AC feed labels, battery condition, alarm logs, and measured input/output values.
51198947-100
Frequently Asked Questions
What is Honeywell 51198947-100?
The Honeywell 51198947-100 is a PM/HPM power supply module used in Honeywell UCN automation systems and xPM power systems serving Process Manager, Advanced Process Manager, and High-Performance Process Manager equipment cabinets. It is also identified as the silver-generation replacement associated with the earlier 51109684-100 and Cherokee International ACX631 references.
What voltage does the 51198947-100 use?
Listings identify the input as 115/240 V AC at 50/60 Hz and identify a 25 V DC, 10 A, 550 W output specification. Honeywell’s xPM maintenance information describes the power-system distribution output as 24 V DC rated at 20 A when one or both supplies are operating. Confirm terminal details, configured AC feed, and the installed chassis documentation before making electrical connections.
Is 51198947-100 interchangeable with 51109684-100?
Market sources identify 51198947-100 as the same as the original Honeywell 51109684-100 and Cherokee International ACX631. However, confirm the installed power-system chassis, left/right supply location, input configuration, connector condition, and site-approved maintenance procedure before treating it as a direct field replacement.
What is the recommended replacement for 51198947-100?
Honeywell’s maintenance document identifies 51198651-100 as the recommended replacement power supply for the xPM family. This does not mean a blind drop-in swap is appropriate. Confirm chassis compatibility, battery-backup arrangement, required upgrade parts, process outage plan, and approved Honeywell service procedure before ordering the newer version.
Can I replace the 51198947-100 while the HPM system is online?
Only when the documented system arrangement, operating procedure, and site risk assessment permit it. Honeywell states that it does not recommend replacing a working supply on-process, except when replacing the older black version. It recommends planned power-supply replacement during scheduled downtime whenever possible. If a supply has already failed in a redundant system, follow the approved HPM/xPM service procedure exactly.
Will HPM programming be lost if both 24 V DC supplies fail?
The xPM system uses CMOS memory backup to prevent database loss during power loss after the battery backup has depleted or is unavailable. Honeywell identifies 3.9 V CMOS memory support from rechargeable batteries on the power-system panel. Do not rely on this as a substitute for verified backups, battery maintenance, and an approved recovery plan.
Why is the Fan/Temp LED important?
A Fan/Temp LED fault indicates either a failed internal fan or an over-temperature condition. That is not a nuisance alarm. Continued operation with inadequate cooling can accelerate capacitor and component degradation and can cause the remaining redundant supply to fail. Inspect fan operation, airflow, filters, cabinet ambient temperature, and contamination immediately.
Is the Honeywell 51198947-100 obsolete?
It should be treated as a legacy HPM/UCN power-system part. Honeywell’s maintenance literature notes that 51198947-100 was the second silver power-supply version and recommends considering replacement of older supplies as a preventive-maintenance activity. Current procurement commonly involves new surplus, tested refurbished, or repair-exchange inventory.
Why might a New Surplus 51198947-100 cost less than an OEM replacement?
New Surplus stock can originate from unused maintenance inventory, cancelled system projects, plant decommissioning stock, or warehouse liquidation. It may be unused but not factory sealed, and capacitor age still matters even if the unit was never installed. Ask for actual label photos, manufacturing or date-code information, storage history, capacitor condition, fan condition, test results, warranty coverage, and packing evidence.
What test process should a supplier provide?
For an HPM power supply, require test evidence that addresses the actual failure modes:
- Verify the exact Honeywell 51198947-100 label, serial information, version, and physical condition
- Inspect the housing, connector contacts, AC input area, fan, switch, airflow path, and alarm-interface connections
- Inspect for corrosion, damaged pins, overheated components, contamination, rework marks, and swollen or leaking capacitors
- Test on a compatible Honeywell xPM/UCN power-system chassis or a documented equivalent fixture
- Verify AC input operation at the approved input configuration
- Measure regulated DC output under load and verify stability during a sustained run
- Verify DC Out, Battery, Fan/Temp, AC In, and Charging indicators
- Confirm charger behavior with the approved battery-backup interface where test equipment permits
- Perform a thermal run long enough to confirm stable fan operation and output regulation
- Provide a test report, photos or video, QC sign-off, ESD-safe protection, heavy-duty packaging, and written warranty terms
A supplier claiming “tested” should state the test rack, input voltage, applied load, measured output, duration of the run, LED results, and whether the cooling fan was replaced or verified. Test photos and videos should be available upon request.
