Emerson 1P00028A05 Detailed Product Description

I. Product Overview

1P00028A05 is an Emerson Ovation DCS system 1P series power module, providing stable DC power supply for control stations and I/O cards. It is a core power supply unit of the system. It adopts industrial-grade rugged design, suitable for high-reliability and long-term operation scenarios in key process industries such as thermal power, chemical engineering, and metallurgy. It has wide input range, stable output voltage, overload protection, redundant backup, and fault self-diagnosis capabilities, ensuring the uninterrupted and stable operation of the control system.

II. Basic Information

Brand: Emerson (艾默生) / Westinghouse (西屋)

Model： 1P00028A05

Product Type： Ovation DCS Control Station Power Module

Compatible Systems： Ovation Legacy System， 1P Series Control Station Cabinet

Installation Location： Special power slot of Ovation 1P Series Control Station (usually slot 0#)

Product Status： Out of Production (EOL)， original refurbished / original second-hand are the mainstream in the market， core spare parts for old systems are scarce

Warranty： Original refurbished item 12 months， disassembled second-hand item 6 months

Manufacturing Standards： Complies with CE， UL， CSA， RoHS industrial certifications， meets Class A industrial EMC and safety requirements

Origin： United States

Weight： Approximately 1.2 kg

Size： Standard 19-inch rack-mounted card specification， compatible with Ovation standard cabinets

III. Core Functions

1. Wide Input Range and Stable Output Voltage

Supports a wide AC input range of 90–265V， adaptable to global industrial grid voltage fluctuations， without the need for additional voltage regulation equipment. Outputs a stable 24V DC power supply， providing pure power supply for control station processors (1P series)， I/O cards (1C/1D series)， communication modules， and field sensors. The output has high precision and low ripple， ensuring accurate signal acquisition and control command execution.

2. High Power Output and Load Adaptability

Rated output power 60W， output current 2.5A， capable of fully driving the fully equipped I/O cards of Ovation 1P series control station (up to 32 cards)， meeting the power supply requirements of large control stations. It has load adaptive capabilities， maintaining stable output under both light load and heavy load conditions， without voltage drift or overheating reduction， suitable for complex industrial load environments.

3. Complete Protection Mechanism

Integrates overvoltage， undervoltage， overcurrent， short circuit， and overheat protection functions： Automatically cuts off output in case of input abnormalities to prevent damage to downstream equipment； Instant current-limiting protection when output short circuit / overcurrent occurs， automatically restored after the fault is cleared； Triggered by internal temperature exceeding a certain threshold， preventing module burnout， providing comprehensive protection for power supply safety.

4. Redundant Configuration and Seamless Switching

Supports 1：1 hardware redundancy configuration， two 1P00028A05 modules operating in parallel， load sharing. Seamless switching without interruption (switching time < 5ms) when the main module fails， without interrupting system operation and not losing data， completely eliminating the risk of single-point power supply failure， meeting the "zero downtime" requirements for critical industrial scenarios.

5. Self-Diagnosis and Status Indication

Built-in power-on self-test (POST) + real-time operation diagnostic mechanism， covering core parameters such as input voltage， output voltage， output current， internal temperature， and redundant synchronization status. The panel is equipped with LED status indicator lights， clearly displaying power status， input faults， output faults， overheating， and redundant out-of-step status， accurately locating problems and facilitating rapid troubleshooting， reducing maintenance difficulty.

6. Industrial-grade Ruggedness and Environmental Adaptability

The product is equipped with a high-strength metal casing and an anti-static coating. The board cards are fully sealed to prevent moisture, corrosion, and salt fog. It has strong resistance to vibration and impact. It is suitable for extreme working temperatures ranging from -40℃ to +70℃. It can withstand harsh industrial environments such as high temperature, high humidity, high dust, and strong electromagnetic interference, ensuring long-term stable operation.

IV. Technical Specifications

1. Input Parameters

Input Voltage: 90V AC to 265V AC, wide-range adaptive

Input Frequency: 47Hz to 63Hz, compatible with global industrial power grids

Input Current: Maximum 1.5A (full load)

Input Protection: Built-in fuse, surge protection, lightning protection

2. Output Parameters

Output Voltage: 24V DC ±1% (stable voltage accuracy)

Output Current: Rated 2.5A, maximum 3A (peak)

Output Power: Rated 60W, maximum 72W (peak)

Output Ripple: <50mV (peak-to-peak), low-noise output

Load Regulation Rate: <0.5% (0–100% load)

3. Environmental Parameters

Operating Temperature: -40℃ to +70℃ (full load, no reduction)

Storage Temperature: -40℃ to +85℃

Relative Humidity: 10%–95% RH, no condensation

Vibration Tolerance: 5g (10–500Hz, sine wave)

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

Protection Grade: IP20 (board card level, compatible with cabinet protection)

4. Electrical Isolation and Insulation

Input / Output Isolation: High-voltage isolation, insulation strength 2000V AC/1min

Insulation Resistance: Input to ground, output to ground ≥ 10MΩ (500V DC)

Anti-interference: Compliant with IEC 61000-6-2 industrial EMC standard

V. Compatibility and Substitution Relationship

1. Adapter for Enclosures and Systems

Compatible Enclosure: Ovation 1P Series Standard Control Station Enclosure (compatible with 1P Processor Slot)

Compatible I/O: 1C Series (Analog), 1D Series (Digital) I/O Cards, seamless compatibility

Compatible Processor: 1P00000G01, 1P00001G01, etc. 1P Series CPU Modules

Compatible Software: Early versions of Ovation Configuration Software, supports power status monitoring and fault alarm

2. Compatibility and Substitution Models

Downward Compatibility: Can directly replace the early version 1P00028A05 (such as 1P00028G01), plug-and-play, no wiring modification, no parameter adjustment required.

Series Upgrade: Subsequent upgrade models are 1P00028A06, 1P00028B05, etc., with higher power, higher efficiency, and more comprehensive protection. The old system can be directly replaced.

Part Replacement Compatibility: Form a complete control station with 1P Series Processors, 1C/1D Series I/O Cards, compatible with old systems for expansion and part replacement in thermal power, chemical industry, etc.

VI. Typical Application Scenarios

1. Thermal Power Generation

Used for power supply of main equipment such as boilers, steam turbines, generators, etc., providing stable power for processors, I/O cards, safety interlock modules, ensuring reliable operation of functions such as load regulation, temperature / pressure / flow control, unit start-stop control, etc., suitable for high-temperature, high-dust, strong electromagnetic interference conditions.

2. Petrochemical Industry

Applied to large-scale refining and chemical plants, reaction vessels, compressor units, distillation towers, etc. DCS control stations, providing 24V DC power supply for on-site instruments, control valves, safety barriers, suitable for high-temperature, corrosive, flammable and explosive environments, ensuring 24-hour continuous production without interruption.

3. Metallurgy / Cement It is adapted to core control stations of blast furnaces, steel rolling lines, kilns, mills, sintering machines, etc., and can withstand high temperatures, high dust, and strong vibration environments. It provides stable power supply for temperature sensors, pressure transmitters, actuators, etc., ensuring precise parameter control and safe operation of equipment.

4. Other industrial fields

It is widely used in key automation systems of water treatment, natural gas, papermaking, pharmaceuticals and other industries. As the core power supply unit of DCS control stations, it ensures the real-time performance, stability and redundancy fault-tolerant capability of the system, reducing the risk of downtime.

VII. Maintenance and Selection Suggestions

1. Spare Parts Selection

For core control stations of old systems, high reliability requirements, and redundant configuration, the original refurbished 1P00028A05 model should be selected as the priority. Key tests include input voltage stabilization performance, output load capacity, protection functions, redundant switching and insulation performance. If the budget is limited, used second-hand components can be selected, but the core functions must be strictly tested to avoid potential faults.

2. Daily Maintenance

Monthly: Check the status of panel LED indicators, clean the dust inside the cabinet, and ensure good heat dissipation.

Every 3 months: Check if the power module connections are firm, if there is oxidation, if the redundant synchronization is normal, and if the output voltage is stable.

Every 6 months: Conduct load tests to verify the output stability, temperature and protection functions under full-load conditions.

Every year: Conduct insulation tests to check the condition of moisture-proof and corrosion-resistant coatings, and promptly address aging issues.

3. Upgrade Suggestions

For new projects, the Ovation 4.0 platform new power module should be given priority. When expanding the old system or replacing spare parts, the same model 1P00028A05 redundant pairing should be selected to ensure compatibility and stability, avoiding system failures caused by insufficient power supply performance.