Detailed Product Description of Emerson 1X00024H04 (Model Alias WH1D-2FF)

I. Product Overview

1X00024H04 (also known as WH1D-2FF) is the new generation of highly reliable AC/DC power module of Emerson (formerly Westinghouse) Ovation DCS system. It is an iterative model of 1X00024H01/H03, designed for high-density I/O cabinets and core control stations in critical process industries. It converts 100–240VAC alternating current into a single 24VDC/20A highly stable output. It emphasizes wide temperature range compatibility, seamless redundant switching, intelligent monitoring, and long-life design. It is a core power supply spare part for 7×24 continuous operation scenarios in power generation, chemical industry, metallurgy, etc., and its comprehensive performance and environmental tolerance are significantly superior to the previous generation. 

II. Basic Information

Brand: Emerson / Westinghouse

Model: 1X00024H04 (Identification: WH1D-2FF)

Product Type: Ovation DCS System 24VDC Redundant Power Module (Leading-edge Industrial Grade)

Compatible Systems: Ovation 1X Series I/O Cabinet, Control Station Enclosure (Fully Compatible with H01/H03 Racks)

Installation Method: Standard 19-inch Rack Installation or DIN Rail Installation

Product Status: In Production Mainstream, New Original Equipment Abundant, Preferred Upgrade for Old Systems

Warranty: New Original 12 Months, Factory Refurbished 12 Months

Manufacturing Standards: CE, UL, CSA, RoHS, Class A Industrial EMC, Complete Compliance with Safety Standards

Origin: United States

Weight: Approximately 3.5 kg

Dimensions: 406mm × 178mm × 102mm (16.0" × 7.0" × 4.0")

Hardware Version: Rev 04 (Downward Compatible with Rev 01/02/03)

III. Core Functions

1. Global Wide-range AC Input and Efficient Conversion

Supports 100–240VAC (±10%) / 50–60Hz Full Range Voltage, Automatically Adapts to Grid Fluctuations, No Need for Jumpers for Adjustment. Utilizes LLC Resonant Soft Switching + Synchronous Rectification Technology, Full Load Efficiency ≥ 95%, Compared to H01, Increases by 10%+, Low Heat Generation, Low Energy Consumption, Reduces Cabinet Heat Dissipation Pressure, Lower Long-Term Operating Costs.

2. Single Path High-Power Precise 24VDC Output

Provides a Single Isolated 24VDC Main Output, Rated 20A/500W, Output Precision ±0.5%, Ripple Noise < 25mV (Peak-to-Peak), Load Regulation Rate < 0.2%, Linear Regulation Rate < 0.05%. Specifically Designed for High-Density I/O and Precision Instruments, Eliminates Signal Drift or Malfunction Caused by Electromagnetic Interference.

3. Redundant Parallel and Millisecond-Level Seamless Switching

Supports N+1 Redundant Parallel, Can Be Combined with the Same Model H04 or Compatible H03 to Form a Redundant System. In the Event of Main Power Failure, The Backup Power < 8ms Seamless Switching, Zero Voltage Drop, Zero System Restart, Ensures Continuous Control Logic and I/O Signals, Meeting Safety Instrument System (SIS) Level Reliability Requirements.

4. Full Function Hot Swap (Zero Downtime for Online Maintenance)

Supports Live Hot Swap, No Power Off, No Shutdown Required to Replace Faulty Modules, Maintenance Without Downtime, Compatible with 7×24 Continuous Operation Conditions, Significantly Reduces Risk of Production Interruption Caused by Power Failure.

5. Intelligent Multiple Protection (Hardware + Software Dual Redundancy)

Built-in Overvoltage, Overcurrent, Short Circuit, Overheat, Reverse Polarity, Surge, ESD Seven-Step Protection: Output Overvoltage > 28VDC Clamping Switch Off; Overcurrent > 22A Constant Current Limiting; Short Circuit Instantaneous Switch Off, Self-Recovery; Overheat > 90℃ Shutdown, < 65℃ Automatic Restart; Input Reverse Polarity Protection Against Burnout; Surge/ESD Protection Up to 4kV. Fault Isolation, Panel Alarm + Remote Dry Contact Upload, Quick Location.

6. Ultra-Wide Temperature Range Industrial Toughened Design

Full Metal Reinforced Shell, Three-Defense Coating (Damp/Waterproof/Corrosion Resistance), Anti-Vibration 5g (10–500Hz), Anti-Impact 15g (11ms). Operating Temperature –40℃ to +85℃ (Rated Load No Reduction), Storage Temperature –40℃ to +85℃, Tolerates Extreme High Temperature, Low Temperature, High Humidity, Dust, Strong Electromagnetic Interference, etc. Environmental Tolerance is the Strongest in the Series. 7. Intelligent status monitoring and remote communication

Panel high-brightness LED three-color indication: green (normal), yellow (alarm), red (fault), clearly displaying input, output, redundancy, and protection status. Supports remote dry contact alarm + RS485 communication, can be connected to DCS/SCADA, achieving centralized monitoring of power supply status, fault warning, historical data traceability, and remote diagnosis, meeting the requirements of intelligent factory operation and maintenance.

IV. Technical Parameters

1. Input Parameters

Input voltage: 100–240VAC (±10%), 50/60Hz

Input current: Maximum 5.5A (240VAC full load)

Surge current: <20A (cold start)

Power factor: ≥0.98 (full load)

2. Output Parameters

Output channels: Single isolated 24VDC

Rated output: 24VDC (±0.5%), 20A, 500W

Ripple noise: <25mV (peak-to-peak)

Load regulation rate: <0.2% (0–100% load)

Linear regulation rate: <0.05% (input ±10% fluctuation)

Isolation strength: Input - Output 2500VAC/1min

3. Protection Parameters

Overvoltage protection: >28VDC clamp / turn-off

Overcurrent protection: >22A constant current limiting

Short-circuit protection: Instantaneous turn-off, self-recovery upon fault elimination

Overheating protection: >90℃ shutdown, <65℃ automatic restart

Insulation resistance: ≥10MΩ (500VDC)

4. Environmental Parameters

Operating temperature: –40℃ to +85℃ (full load no reduction)

Storage temperature: –40℃ to +85℃

Relative humidity: 5%–95% RH, no condensation

Vibration: 5g (10–500Hz, sine wave)

Impact: 15g (11ms, half sine wave)

Protection grade: IP20 (module level, compatible with cabinet protection)

V. Compatibility and Substitution Relationship

1. Compatible systems and components

Compatible cabinets: Ovation 1X series I/O cabinets, standard control station chassis (compatible with H01/H03 racks)

Compatible loads: Ovation 1C/1P/1X controllers, high-density I/O modules, communication cards, 24VDC explosion-proof instruments / safety barriers

Redundancy configuration: Supports forming N+1 redundancy with the same model H04 or H03

Spare parts: 19-inch rack tray, DIN rail adapter, dedicated connector

2. Replacement and Compatible Models

Same model interchangeable: 1X00024H04 (WH1D-2FF) fully interchangeable

Upward compatibility: Completely replaces H01/H03, performance, temperature range, protection fully upgraded

Downward compatibility: Old system H01/H03 cabinets can be directly upgraded without modifying the rack

VI. Typical Application Scenarios

1. Thermal Power Generation

Used for high-density I/O cabinets and core control stations of boilers, steam turbines, and generators, providing power for Ovation controllers, multi-channel analog/digital I/O, temperature/pressure transmitters, valve positioners, etc., capable of withstanding high temperatures, dust, and strong electromagnetic interference in boiler areas, ensuring zero interruption of control power supply.

2. Petrochemical Industry

Applied to high-load I/O stations and ESD systems of large-scale refineries, reaction vessels, compressor units, distillation towers, providing power for explosion-proof instruments, safety barriers, solenoid valves, emergency stop systems, redundant + hot-swappable configuration suitable for flammable and explosive, corrosive environments, ensuring continuous operation of the process and reliable safety interlocks.

3. Metallurgy / Cement Adapted to high-temperature and high-vibration control cabinets for blast furnaces, steel rolling lines, kilns, and mills, capable of withstanding 85℃ high temperature, strong dust, and mechanical vibration, providing power for on-site sensors, motor control modules, and interlock circuits to ensure stable and safe interlock without failure.

4. Water treatment / Natural gas / Papermaking

Used for outdoor / semi-outdoor DCS cabinets in water treatment plants, natural gas gate stations, and paper mills, with -40℃ low-temperature startup suitable for northern winters, high humidity / salt fog protection suitable for coastal / humid environments, providing high-reliability power supply for I/O modules, on-site instruments, and actuators, reducing maintenance costs.

VII. Maintenance and Selection Suggestions

1. Spare Parts Selection

For the Ovation system, **core control station, high-density I/O cabinet, ESD/SIS circuits, extreme conditions (high temperature / low temperature / high humidity)**, prioritize the use of brand-new original H04; for old systems, upgrade directly to H04 and replace H01/H03, significantly improving stability and lifespan; for limited budgets, choose original refurbishment, with key inspections on output accuracy, ripple, redundant switching, protection thresholds, and communication functions.

2. Daily Maintenance

Monthly: Check LED status, clean cabinet dust, ensure smooth heat dissipation airways

Every 3 months: Check installation tightness, no looseness / oxidation of connectors, measure output voltage and ripple

Every 6 months: Verify redundant switching, remote alarm / communication functions, check three-proof coating

Every year: Full performance tests (load / linear adjustment rate, protection thresholds), vibration / insulation inspection

3. Upgrade and Expansion Suggestions

For new projects, core cabinets must be equipped with dual redundant H04; for old systems, expansion is prioritized with H04, compatible with the original rack, with comprehensive performance surpassing H01/H03; for extreme conditions (-40℃ or above + 75℃), H04 is the only recommended option to avoid failure caused by insufficient temperature range of H01/H03.