EMERSON 1X00417H01 (Model Alias: WH7A-2DF) Product Description

I. Product Overview

The Emerson 1X00417H01 (designated as Model Alias WH7A-2DF) is a high-performance dual-output power module of the Emerson Ovation DCS system. It was designed by the original Power-One (Bel Fuse) and manufactured by Emerson. It provides isolated, redundant, and highly stable 24V DC power for controllers, I/O cards, and field instruments within the Ovation cabinet. It is a core power supply unit of the system. This module is the initial model of the 1X00417 series. It features a reinforced metal casing, wide temperature range design, and intelligent heat dissipation. It is suitable for medium-power, dual-isolation power supply scenarios in critical process industries such as power, chemical, oil and gas, and metallurgy, ensuring the long-term uninterrupted operation of the DCS and eliminating the risk of single-point power failure. 

II. Core Functions

Wide-range AC input + Dual 24V outputs, more flexible isolated power supply

Supports an ultra-wide voltage input range of 100–240V AC (50/60Hz, ±20% voltage tolerance), compatible with global industrial power grids, suitable for environments with unstable voltages; provides dual independent isolated 24V DC outputs, each with a rated capacity of 12.5A and a peak capacity of 14A, a total power of 600W, capable of providing isolated power supply for the controller and I/O station respectively, avoiding cross-interference; output voltage accuracy ±1%, ripple ≤ 50mV (peak-to-peak), load regulation rate ≤ 0.5%, linear regulation rate ≤ 0.1%, excellent voltage regulation performance, protecting precision load equipment.

Redundant parallel + Current sharing control, seamless switching high reliability

Supports dual-module redundant parallel connection, can be used in conjunction with the same model or 1X00416 series power supplies; when the main module fails, the standby module automatically takes over the load with zero switching time, without interrupting the system operation; built-in intelligent current sharing circuit, balanced distribution of dual-module loads, extending the overall machine lifespan, completely eliminating power supply single-point failures, ensuring continuous operation of the system 24/7.

Multiple electrical isolation + Comprehensive protection, strong anti-interference capability

Adopts input-output, output-ground, and path-path triple isolation design, with an isolation strength of 1500V AC/1min, blocking ground potential difference, common-mode interference, and transient shock; built-in overvoltage, undervoltage, overcurrent, short circuit, reverse polarity, surge suppression, ESD protection, overheat protection multiple protection circuits, automatic current limiting for output short circuit, self-recovery upon fault removal; complies with EN 61000-6-1/2/3/4, CE, UL 508, RoHS, CSA standards, capable of withstanding interference from power supplies, large-power motors, etc., suitable for high-interference industrial environments.

Intelligent cooling + High efficiency low power consumption, wide temperature long-term operation

Adopts intelligent temperature-controlled cooling design, built-in efficient heat sink and temperature control fan (for some models, it is natural cooling), automatically adjusting cooling efficiency according to internal temperature, balancing heat dissipation and low noise; conversion efficiency up to 97%, full-load low heat generation, low power consumption, energy-saving; operating temperature range **-40℃ to + 70℃** (full-load no reduction), storage temperature -40℃ to + 85℃, relative humidity 0%–95% RH (non-condensing); withstands vibration (5g rms, 10–500Hz) and shock (30g, 11ms half-sine wave), average failure-free time (MTBF) ≥ 1000,000 hours, suitable for outdoor, mining, chemical, metallurgical, and other extreme industrial environments.

LED status indication + Remote diagnosis, precise and efficient operation

The panel is equipped with high-brightness LED indicators for power, operation, fault, and output status, intuitively displaying input power supply, dual output voltages, fan operation, and alarm status; supports Ovation system remote health monitoring and fault diagnosis, capable of uploading input abnormalities, output overvoltage/undervoltage, overcurrent, overheat, etc., 10 + types of fault codes, real-time monitoring of module key parameters, precise fault location, significantly reducing troubleshooting and repair time.

Online hot-swappable + Standardized installation, flexible and convenient deployment

Adapts to Ovation standard I/O rack DIN rail / 19-inch standard rack installation, supports online hot-swappable replacement, without system shutdown, does not affect other modules and load operation, effectively reducing downtime losses; metal reinforced enclosure + three-proof coating (damp-proof, salt spray-proof, corrosion-proof, in compliance with MIL-STD-810 standards), sturdy structure, convenient installation and maintenance.

III. Technical Specifications

(1) Input Parameters Input Voltage: 100–240V AC (±20%), 50/60Hz

Input Current: ≤ 6.5A (full load, 240V AC input)

Input Surge: Compliant with EN 61000-4-5 standard

Input Isolation: 1500V AC/1min (input-output)

Surge Current: ≤ 28A (maximum)

(II) Output Parameters

Output Channels: Dual independent isolated 24V DC

Output Voltage: 24V DC (±1%)

Output Current: Rated 12.5A per channel, peak 14A; total rated 25A

Total Output Power: Rated 600W, peak 672W

Ripple Noise: ≤ 50mV (peak-to-peak)

Load Regulation: ≤ 0.5% (0–100% load)

Linearity Regulation: ≤ 0.1% (±20% input voltage)

Channel Isolation: 1500V AC/1min (channel-to-channel)

Output Isolation: 1500V AC/1min (output-to-ground)

(III) Electrical Protection Parameters

Overvoltage Protection: Protection when input ≥ 265V AC or output ≥ 28V DC

Undervoltage Protection: Protection when input ≤ 90V AC or output ≤ 20V DC

Overcurrent Protection: Limiting current limiting protection when output ≥ 115% rated current for a limited time

Short Circuit Protection: Automatic current limiting when output short-circuits, automatic recovery after fault removal

Overheating Protection: Reduced rating when internal temperature ≥ 80℃, shutdown when ≥ 90℃

Insulation Resistance: ≥ 10MΩ (500V DC)

(IV) Environmental Parameters

Operating Temperature: -40℃ to + 70℃ (full load without rating reduction)

Storage Temperature: -40℃ to + 85℃

Relative Humidity: 0%–95% RH (non-condensing)

Anti-Vibration: 5g rms, 10Hz–500Hz

Anti-Shock: 30g, 11ms half-sine wave

EMC Performance: Compliant with EN 61000-6-1/2/3/4, CE, UL 508, CSA, RoHS

Protection Grade: IP20 (module body)

Three-Defense Performance: Moisture-proof, salt fog-proof, corrosion-proof (MIL-STD-810)

(V) Physical Parameters

Size: 400mm×205mm×103mm (width × height × depth)

Weight: Approximately 1.42kg

Material: Aluminum alloy reinforced enclosure, military-grade PCB board + three-defense coating

Installation Method: DIN rail installation / 19-inch standard rack installation

Certification: CE, UL 508, RoHS, CSA

Origin: USA

Four. Product Features

Dual isolation output, safer power supply architecture

Dual independent isolated 24V DC output, 12.5A per channel, can achieve physical isolation power supply for the controller and I/O station, critical loads and ordinary loads, avoiding single-channel failure affecting the entire system, reducing common-mode interference and ground potential difference risks, suitable for high-security level DCS systems.

Wide temperature reinforcement durability, suitable for harsh working conditions

-40℃ to + 70℃ ultra-wide operating temperature range, metal reinforced enclosure + three-defense coating, strong anti-vibration and anti-shock ability, MTBF ≥ 100 million hours, long-term operation with extremely low failure rate, suitable for power, chemical, oil and gas, metallurgy and other harsh industrial environments.

Redundant seamless switching, extremely high reliability

Supports dual-module redundant parallel connection, zero switching time automatic takeover of the load, built-in intelligent current sharing circuit, load balance distribution, completely eliminating power supply single-point failure, ensuring 24/7 continuous operation of the system, significantly reducing downtime risks and losses.

Efficient low-noise cooling, energy-saving

97% conversion efficiency, full load low heat generation, low power consumption; Intelligent temperature control and cooling ensure both cooling efficiency and low noise, are energy-saving and environmentally friendly, and can reduce operating costs.

Hot-swappable + remote diagnosis, making operation and maintenance efficient and convenient.

Support for online hot-swappable replacement without downtime, significantly reducing maintenance time and lowering maintenance costs; LED status indicator lights clearly display the operating status, and remote diagnosis can precisely locate faults, facilitating rapid troubleshooting and repair.

High standard compatibility, flexible deployment.

Standard DIN rails / 19-inch rack installation, compatible with Ovation standard cabinets and I/O racks, ready for immediate use; compatible with Ovation's full range of controllers, I/O modules, and system versions, with strong versatility, allowing for direct replacement of 1X00416 series and other single-power-supply modules, suitable for different-sized and-configured Ovation DCS system projects.

V. Application Scope

Power industry: Ovation DCS system main control cabinets and remote I/O stations for controllers, I/O modules, transmitters, actuators, etc., providing dual isolation 24V DC power supply for controllers, I/O modules, transmitters, and actuators, suitable for strong electromagnetic interference, high-temperature, and vibration conditions, ensuring continuous and stable power supply during power generation.

Chemical industry: Ovation DCS system main control cabinets and on-site I/O stations for control systems and explosion-proof on-site instruments, providing dual isolation power supply for control systems and explosion-proof on-site instruments, suitable for explosion-proof, humid, salt fog, and corrosive gas environments, ensuring continuous production and avoiding power failure-induced process interruptions.

Oil and gas industry: Ovation system cabinets for oil and gas extraction platforms, long-distance pipeline stations, and refining and chemical plants, providing dual power supply for control systems and on-site equipment in extreme temperatures, sandstorms, and salt fog environments, with strong ability to resist harsh environments, ensuring safety in oil and gas production and transportation.

Metallurgical industry: Ovation automation system cabinets for steel and non-ferrous metal smelting, providing dual isolation power supply for controllers, I/O modules, and detection instruments in high-temperature, dust, and strong electromagnetic interference conditions, suitable for continuous production scenarios in metallurgy, ensuring stable smelting processes.

Other industrial scenarios: Ovation DCS system main control cabinets and remote control stations for large-scale water treatment, papermaking, cement, and pharmaceutical industries, providing dual isolation power supply for on-site process parameter collection and equipment control-related electronic equipment, suitable for long distances, strong interference, and harsh conditions, supporting stable system operation.

VI. Installation and Maintenance

(1) Installation Requirements

Installation location: Installed on Ovation standard I/O rack DIN rails or 19-inch cabinets, installed firmly and vibration-resistant; reserve ≥100mm of space above and below the module and ≥50mm of space on the left and right for heat dissipation, away from strong heat sources and strong electromagnetic sources (such as frequency converters, large-power motors), ensuring smooth ventilation.

Installation specifications: Use standard snap-in or rack fasteners for installation, ensuring good contact between the module and the backplane; when installing, wear an anti-static wristband to avoid damage to electronic components due to static electricity; when installing multiple modules in parallel, the spacing should be ≥50mm to ensure heat dissipation and signal isolation; for redundant installation, the spacing between the two modules should be ≥100mm to facilitate maintenance and heat dissipation.

Cable connection specifications: Input side uses compliant AC power cables, firmly connected without loosening, with clear distinctions for live, neutral, and ground wires; output side uses multi-strand copper core DC cables, with correct positive and negative polarity for dual output, to avoid reverse polarity; all connection terminals should be tightened with a torque of 1.5–2.0N・m to prevent loosening and overheating; cable arrangement should be neat, away from strong electromagnetic interference sources, and avoid excessive bending.

(2) Maintenance Points

Regular inspection: Monthly inspection of module appearance, LED status indicator lights, cooling fan operation status, and connection terminals to confirm normal input and output voltages, no overheating, abnormal noise, or loosening; Check the DCS system diagnostic log to identify potential issues such as input abnormalities, output fluctuations, and fan failures.

Maintenance: Clean and maintain the modules by wiping the surface, cooling fans, and ventilation ports with a dry soft cloth or low-pressure compressed air every quarter. Remove dust and oil stains to prevent dust accumulation from affecting heat dissipation and insulation performance. In dusty environments, the cleaning frequency can be shortened to once a month. Do not use corrosive cleaning agents or liquids for direct wiping.

Troubleshooting: When the output is abnormal, first check if the input voltage is normal and if the wiring is loose, then check if the load is short-circuited or overloaded; when the fan stops rotating, check the fan power supply or replace the fan; when the module fails, perform an online hot-swapping replacement operation, and then verify the output voltage and the load operating status.

Replacement precautions: Support online hot-swapping, so there is no need to shut down the system during replacement; first disconnect the input switch of the faulty module, remove the wiring, then remove the module, install the new module and restore the wiring, close the input switch, and confirm that the module starts normally and the output is stable; the old module should be stored according to specifications to avoid damage from static electricity and moisture.

VII. Order Information

Product Model: 1X00417H01 (also known as: WH7A-2DF)

Brand: Emerson (艾默生)

Series： Ovation DCS System 1X Series Dual-Output Power Module

Input Specifications： 100–240V AC， 50/60Hz

Output Specifications： Dual 24V DC， each channel rated 12.5A/300W， total rated 25A/600W

Packaging： Original anti-static packaging， including installation manual， certificate of conformity， and wiring terminals

Warranty： 12-month original factory warranty， providing global technical support and after-sales maintenance