FLXA21-D-E-D-AA-P1-NN-A-N-LA-N Yokogawa

FLXA21-D-E-D-AA-P1-NN-A-N-LA-N Yokogawa Power Board

Product  Description：

Yokogawa Power Boards are high-reliability electronic assemblies engineered to distribute, regulate, and filter electrical energy within critical industrial automation systems, most notably the CENTUM Distributed Control System (DCS) and the ProSafe-RS Safety Instrumented System (SIS). These boards operate as the vital energy regulation layer, taking raw power from external utility sources and converting it into highly stable, isolated DC voltage rails needed by sensitive control processors, communication modules, and field I/O circuitry.

Product Parameters

The technical configuration of a Yokogawa Power Board focuses on strict electrical isolation, power density, and continuous output stability:

• Input Voltage Range: Universally designed to accept dual-source inputs including 100V-120V AC, 200V-240V AC, or 24V DC to allow for seamless battery backup pairing.

• Output Voltage Precision: Regulates and supplies multiple independent DC rails, such as 5V DC for internal logic circuits and 24V DC for external loop power, with a voltage tolerance kept strictly within 1 percent.

• Rated Load Current: Varies depending on system size, with standard module capacities engineered to deliver continuous currents from 5A up to 30A or more.

• Holdup Time: Built-in energy storage capabilities that maintain full output voltage for at least 20 milliseconds during temporary input power drops, allowing the system to ride through minor grid fluctuations.

• Insulation Resistance: High-voltage galvanic isolation between primary input circuits and secondary output logic, typically rated at 100 Megohms or greater at 500V DC.

• Dielectric Strength: Engineered to withstand transient voltage surges, with a dielectric rating of 1500V AC or higher for 1 minute between power terminals and the chassis ground.

Product Advantages

Yokogawa Power Boards are preferred in continuous-process industries due to their exceptional uptime design and robust electrical characteristics:

• True Redundant Architecture: Supports parallel connection setups with internal auctioneering diodes, ensuring that if one power board fails, the backup board instantly assumes the full electrical load without a millisecond of voltage drop.

• Online Maintenance and Hot-Swapping: Faulty power boards can be safely unplugged and replaced while the DCS or safety system is fully energized and controlling live processes, eliminating the need for system shutdowns.

• Comprehensive Diagnostics: Features built-in predictive monitoring circuits that constantly check internal component temperatures, output ripple voltages, and capacitor degradation states to alert operators before an actual failure occurs.

• Advanced Noise and Surge Filtering: Integrated multi-stage electromagnetic interference (EMI) filters and transient voltage surge suppressors (TVSS) shield internal processor buses from heavy electrical spikes coming from the factory grid.

• Conformal Coating for Protection: Standard production includes high-grade G3-compliant conformal coating, providing excellent resistance against moisture, conductive dust, and corrosive gases like hydrogen sulfide.

Product Applications

These power boards act as the foundational energy core for continuous, zero-downtime automation architectures across global infrastructure:

• Refinery Control Rooms: Providing clean, continuous power to the distributed control systems managing complex oil refining and distillation processes.

• Chemical and Petrochemical Plants: Powering both the regulatory DCS and the emergency safety shutdown systems (SIS) that monitor critical reactor temperatures and pressures.

• Off-Shore Oil Platforms: Operating in highly corrosive marine environments to power remote I/O enclosures and emergency valve control systems.

• LNG Liquefaction and Gasification: Running the highly synchronized automation racks required to keep cryogenic liquefied natural gas processing safe and stable.

• Large-Scale Thermal Power Generation: Supplying stable voltage rails to turbine control units, boiler protection systems, and water treatment monitoring racks.

Important Precautions

To maintain operator safety and guarantee the long-term reliability of the power system, the following precautions are mandatory:

• Residual Capacitive Charge Hazard: The high-capacity filtering capacitors on the power board store dangerous levels of electrical energy even after the main power is disconnected. Always wait at least 5 minutes and verify with a voltmeter that the board is discharged before attempting removal or inspection.

• Dual Input Separation: When utilizing a redundant power layout, ensure that the two independent input power lines are derived from separate phases or separate Uninterruptible Power Supply (UPS) units to avoid a single grid fault from dropping both supplies.

• Ventilation Clearanace: Power boards generate heat during normal voltage conversion. They must be mounted vertically within the chassis, and the ventilation gaps at the top and bottom of the rack must remain entirely unobstructed to prevent thermal overload.

• Terminal Tightening Torque: Ensure all input and output power cable connections are tightened securely to the exact manufacturer torque specifications. Loose terminals in high-vibration industrial settings create localized high resistance, which causes excessive heat and fire hazards.

• Periodic Capacitor Inspection: While these boards are built for long lifecycles, the electrolytic smoothing capacitors degrade naturally over time. It is vital to track the module's lifetime diagnostic logs and replace the unit according to the plant's preventive maintenance schedule.

The structure and details of the product：

Our services：

Shipping Port:  China

Payment: Bank of Chicago, Bank of Singapore

Express cooperation: fedex, DHL, UPS and your express account

Service: Professional Sales provides 24 hours /7 days online service

Warranty: one year

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JUSTWELL PTE. LTD

Our main products include DCS control system spare parts, PLC system spare parts, and robot system spare parts. Our advantageous brands include Allen Bradley, Bently Nevada, ABB, HIMA, Reliance, Bender, National Instruments, Emerson Ovation, Honeywell, Siemens, Allen Bradley, ICS Triplex, FOXBORO, Schneider, GE Fanuc, Motorola, HIMA, Prosoft, and other imported industrial components. Our main products serve a wide range of electronic, metallurgical, chemical, and power plants Industries such as steel mills, rubber, cement, machinery and equipment, and construction.