Description
🔹 Product Overview
The Honeywell ACX631, identified by part numbers 51198947-100 and 51109684-100, is an industrial power supply designed for Honeywell UCN-based PM, APM, and HPM equipment cabinets.
This power supply provides regulated DC power for Honeywell control system equipment and can operate from a wide-range AC input or from a 48 VDC battery backup source. The battery-supported design helps maintain system power during an AC supply interruption.
The 51198947-100 version is part of Honeywell’s silver power supply generation used in legacy control-system installations. The ACX631 designation is also associated with Cherokee International manufacturing identification. Honeywell documentation identifies 51198947-100 as Version 2 of the silver power supply family, while 51109684-100 is an earlier Version 1 model.
🔹 Main Features
⚙️ Honeywell industrial control system power supply
⚙️ ACX631 power supply platform
⚙️ Part number 51198947-100
⚙️ Associated part number 51109684-100
⚙️ Designed for Honeywell PM, APM, and HPM equipment cabinets
⚙️ Wide-range AC input
⚙️ 48 VDC battery backup capability
⚙️ Regulated 24/25 VDC system output
⚙️ Nominal 10 A output capability
⚙️ Approximate 550 W power rating
⚙️ Battery charging function
⚙️ AC synchronization output
⚙️ Parallel power supply operation supported
⚙️ Suitable for redundant industrial power arrangements
🔹 Technical Specifications
| Parameter | Specification |
|---|---|
| Brand | Honeywell |
| Model | ACX631 |
| Part Number | 51198947-100 |
| Related Part Number | 51109684-100 |
| Product Name | HPM Power Supply |
| Product Type | Industrial AC/DC Power Supply |
| Application | Honeywell PM / APM / HPM Cabinets |
| Input Voltage | 85–264 VAC |
| AC Input Frequency | 50/60 Hz |
| Battery Input | 48 VDC |
| Main DC Output | Approx. 25.25 VDC from AC input |
| Battery DC Output | Approx. 24.25 VDC from 48 V battery |
| Output Current | 10 A nominal |
| Power Rating | Approx. 550 W |
| Additional Output | Approx. 6 VAC |
| Additional Output Load | Approx. 35 mA |
| Battery Function | Integrated 48 V battery charging circuit |
| Parallel Operation | Supported |
| Operating Temperature | -20 to +55°C at full load |
| Maximum Operating Temperature | Up to +65°C with output derating |
| Weight | Approx. 5 kg shipping weight |
| Country of Origin | United States / Verify by Nameplate |
| Product Condition | New Surplus / New Open Box / Used, depending on supplied unit |
The electrical specifications above are based on available product documentation for the 51198947-100 HPM power supply configuration.
🔹 Power Supply Function
The ACX631 converts the available input power into regulated DC power for compatible Honeywell control equipment.
When normal AC power is available, the unit supplies regulated DC output to the connected system equipment. The power supply also supports a 48 VDC battery connection for backup operation.
During an AC power interruption, the battery supply can support the power system, depending on the overall battery configuration and load conditions.
The integrated charging function helps maintain the connected battery system during normal operation.
🔹 AC Input Operation
⚡ Wide AC input range
⚡ Designed for industrial control cabinets
⚡ 50/60 Hz AC operation
⚡ Regulated DC output for Honeywell control equipment
⚡ Suitable for continuous control-system operation
The input voltage should always be verified against the exact unit nameplate before energizing the power supply.
🔹 Battery Backup Function
🔋 Supports connection to a 48 VDC battery source
🔋 Provides DC system power during an AC interruption
🔋 Includes a battery charging circuit
🔋 Suitable for redundant and backup power architectures
🔋 Supports improved power continuity for critical control equipment
Battery condition is an important part of the overall system. A power supply can operate correctly while an aged or damaged battery bank is unable to provide sufficient backup time.
🔹 Parallel Operation
The ACX631 power supply platform supports the use of two or more compatible power supplies with outputs connected in parallel.
This arrangement can be used where additional power capacity or redundancy is required.
Before connecting power supplies in parallel, the complete system design, wiring arrangement, power ratings, and compatibility should be verified.
⚠️ Parallel operation should only be performed according to the approved Honeywell power-system configuration.
🔹 Installation Notes
Before installing or replacing the power supply:
- Confirm the complete part number on the nameplate.
- Verify whether the installed unit is 51198947-100 or 51109684-100.
- Check the AC input voltage.
- Inspect the 48 V battery connection.
- Verify output wiring and polarity.
- Check cabinet ventilation.
- Inspect connectors and terminals.
- Follow ESD and electrical safety procedures.
- Verify the output voltage before reconnecting sensitive control equipment.
- Check the battery charging function.
- Confirm system diagnostics after startup.
Because 51109684-100 and 51198947-100 belong to different generations of the silver power supply family, the exact installed configuration should be verified before replacement. Honeywell identifies these as Version 1 and Version 2 units respectively.
🔹 Maintenance Tips
🛠 Inspect the power supply for dust and contamination.
🛠 Check cooling and cabinet ventilation.
🛠 Inspect input and output terminals.
🛠 Measure the DC output voltage under normal load.
🛠 Check the condition of the backup battery system.
🛠 Inspect battery wiring and charging connections.
🛠 Monitor power supply temperature.
🛠 Record the complete model and part number before replacement.
🛠 Perform periodic battery load testing according to the site’s approved maintenance procedure.
🛠 Check redundant or parallel power supplies individually where the system design permits.
For older control systems, power-supply age should also be considered during maintenance planning. Honeywell has specifically identified the older Version 1 and Version 2 silver power supplies as products that have exceeded the recommended 10-year service life and recommends replacement planning.
🔹 Common Questions
❓ Q: What is the Honeywell ACX631?
A: It is an industrial HPM power supply used with compatible Honeywell PM, APM, and HPM control-system equipment.
❓ Q: What is the part number 51198947-100?
A: 51198947-100 identifies a Version 2 Honeywell silver power supply used in the ACX631 power supply family.
❓ Q: What is 51109684-100?
A: 51109684-100 is an earlier Version 1 part number in the Honeywell silver power supply family.
❓ Q: Can 51109684-100 and 51198947-100 be treated as identical?
A: No. They belong to the same general power supply family but represent different product versions. The exact system configuration and approved replacement requirements should be checked before substitution.
❓ Q: What AC input range does the power supply support?
A: Available product documentation identifies an operating input range of approximately 85–264 VAC.
❓ Q: Does the unit support battery backup?
A: Yes. The power supply can operate with a 48 VDC battery source and includes a battery charging function.
❓ Q: What DC output does it provide?
A: Available documentation lists approximately 25.25 VDC from the AC supply and approximately 24.25 VDC when operating from a 48 V battery source.
❓ Q: What is the nominal output current?
A: The main output is rated at approximately 10 A.
❓ Q: Can multiple power supplies operate in parallel?
A: Yes. Available documentation states that two or more compatible units can be used with their outputs paralleled.
❓ Q: Is this a PLC processor?
A: No. The ACX631 is a dedicated industrial power supply rather than a PLC processor or I/O module.
🔹 Typical Applications
🏭 Honeywell PM control cabinets
🏭 Honeywell APM systems
🏭 Honeywell HPM systems
🏭 UCN-based control architectures
🏭 Process automation systems
🏭 Refinery control systems
🏭 Petrochemical facilities
🏭 Chemical plants
🏭 Power-generation control systems
🏭 Legacy Honeywell DCS installations
🔹 Related Honeywell Models
1️⃣ 51198651-100 – Current-Generation Silver Power Supply
2️⃣ 51109684-100 – Version 1 Silver Power Supply
3️⃣ 51198947-100 – Version 2 Silver Power Supply
4️⃣ 51109456-200 – Legacy Black Power Supply
5️⃣ 51199929-100 – Honeywell Control System Power Supply
6️⃣ 51199947-175 – Honeywell Industrial Power Module
7️⃣ 51197564-100 – Honeywell Control Power Module
8️⃣ 51401598-100 – Honeywell Industrial Power Assembly
9️⃣ 51199942-300 – Honeywell System Power Module
🔟 51195156-100 – Honeywell Industrial Power Supply
🔹 Product Summary
The Honeywell ACX631 51198947-100 | HPM Power Supply is designed to provide regulated power for compatible Honeywell PM, APM, and HPM control-system equipment.
Its wide AC input range, 48 VDC battery support, battery charging capability, regulated DC output, and parallel-operation capability make it suitable for industrial control systems requiring reliable power continuity.
For replacement projects, always verify the complete part number, power-supply generation, host cabinet configuration, input wiring, battery system, output requirements, and approved maintenance documentation before installation.
