Emerson 1D54581G03 (WDPF/Ovation 1D series power supply)
1D54581G03 is the original Westinghouse (now Emerson) WDPF/Ovation DCS 1D series Multibus power module, providing system bus and I/O power supply for the 1D chassis (1D54580G01/G02). It is the core power unit of the control station and is widely used in key control cabinets such as thermal power and chemical industries.

I. Basic Information

Brand: Emerson / Westinghouse

Model: 1D54581G03 (G03 is the hardware version, and the upgraded version is 1D54581G04)

Type: WDPF Multibus Power Supply

Compatible Systems: WDPF Legacy, Ovation DCS (1D series hardware)

Installation Location: 1D54580G01 (single rack) / G02 (dual rack) power supply slot in the chassis

Status:停产 (EOL)， market mainly consists of original second-hand / refurbished products

Warranty： Original factory 12 months； refurbished 6–12 months

II. Core Functions

Multi-channel voltage stabilization output， system-level power supply

Provide stable DC power to the MultiBus bus on the backplane of the 1D chassis， the controller， and I/O cards， supporting redundant parallel (dual power hot backup).

Built-in overvoltage / overcurrent / short circuit / overtemperature protection， automatic isolation of faults， without affecting the operation of the entire machine.

Wide-range AC input， global compatibility

Support 110/120VAC or 220/240VAC adaptive input， frequency 47–63Hz， compatible with industrial power grids in various countries.

Input side with EMI filtering， suppressing surges and electromagnetic interference， improving system immunity.

Hot-swappable and status monitoring

Support online hot-swapping， replacing the power supply without stopping the machine， friendly for maintenance.

Panel with LED indicators (power normal， fault， alarm)， intuitive status， facilitating quick troubleshooting.

Industrial-grade rugged design

Metal enclosure， anti-static / anti-corrosion coating， anti-vibration 5g， anti-shock， suitable for high-temperature， high dust， strong electromagnetic interference working conditions.

Built-in fan for forced cooling， working temperature 0℃～+60℃， long-term stable operation under full load.

III. Technical Parameters (Typical Values)

Input Voltage： 110/120VAC or 220/240VAC (adaptive)

Input Frequency： 47–63Hz

Output Voltage (Multi-channel)：

+5V (system logic)

±15V (analog I/O)

+24V (digital I/O)

Output Power： Approximately 150–200W (compatible with full load of 1D chassis)

Protection Mechanism： Overvoltage， overcurrent， short circuit， overtemperature (automatic shutdown / restart)

Heat Dissipation Method： Built-in fan forced air cooling

Environmental Parameters： Working 0℃～+60℃； Storage -40℃～+85℃； Humidity 5%–95% without condensation

Physical Size： Standard 19-inch， 3U height (133mm)， depth approximately 380mm

Weight： Approximately 4.5kg

Certification： CE， UL， CSA (original factory of Westinghouse)

IV. Compatibility and Accessories

1. Required Chassis

Single rack： 1D54580G01 (1 power supply slot)

Dual rack： 1D54580G02 (2 power supply slots， redundant configuration)

2. Parallel Redundancy

Same model power supplies 1D54581G03/G04 can be paralleled to achieve 2N redundant power supply， any power supply failure will automatically switch seamlessly， ensuring uninterrupted system operation.

3. Alternative Models

Upgrade version： 1D54581G04 (compatible with G03， more stable performance)

Same series： 1D54574G01/G02 (another power supply in the 1D series， different power)

V. Typical Applications

Thermal power generation： Boiler / steam turbine / generator redundant control station power supply， ensuring long-term stable operation of the machine.

Petrochemical industry： Large-scale refining， reaction vessels， compression units， key control cabinets， suitable for 24-hour continuous production conditions. Metallurgy / Cement: Blast furnaces, rolling mills, kilns. Core control station, suitable for high temperature, dust, and vibration environments.

Six. Maintenance and Upgrade Suggestions

Maintenance of old system: Preferentially use original refurbished parts. Test output voltage accuracy, load capacity, protection functions, and fan status to ensure hot-swappable reliability.

Upgrade replacement: For new projects, it is recommended to upgrade to the Ovation 4.0 OCR3000 controller + new redundant power supply solution to enhance performance and maintainability.