Description

The Foxboro P0500RU is a redundant,hot-swappable power supply module designed for the Foxboro I/A Series®distributed control system(DCS)—a flagship process automation platform now part of Schneider Electric’s EcoStruxure™Foxboro DCS portfolio.This module delivers a stable 24 V DC output at up to 10 A continuous current,supporting critical components such as Fieldbus Modules(FBMs),controller processors(CPs),I/O carriers,and operator workstations within I/A Series racks.

Engineered for mission-critical environments,the P0500RU operates in N+1 redundant configurations:multiple units share the load,and if one fails,the others seamlessly assume full capacity without interrupting system operation.It accepts a wide 85–264 V AC universal input(47–63 Hz),includes over-voltage,over-current,and short-circuit protection,and features front-panel LEDs for real-time status monitoring(AC OK,DC OK,Fault,Redundancy Active).

Designed for easy maintenance,the P0500RU supports hot-swap replacement—allowing technicians to replace a faulty unit without powering down the entire I/O rack,a crucial capability in continuous-process industries like refining,chemicals,and power generation.

 

Application Scenarios

At a petrochemical plant in Texas,an I/A Series DCS controls a high-pressure polyethylene reactor.The I/O rack housing FBM207 analog input modules and FBM237 HART communication cards is powered by three P0500RU units in N+1 redundancy.During a summer heatwave,one power supply triggered an internal thermal shutdown due to elevated ambient temperature.Thanks to redundancy,the remaining two units instantly carried the full 18 A load.The FAULT LED illuminated,and an alarm appeared in the Foxboro SCADA interface.Maintenance replaced the unit during the next shift—without tripping the reactor or losing sensor data—demonstrating the P0500RU’s role in ensuring process continuity and safety.

Parameter

Main Parameters Value/Description

Product Model P0500RU

Manufacturer Foxboro(Invensys)→Now Schneider Electric

Product Category Redundant Power Supply Module–I/A Series DCS

Output Voltage 24 V DC±2%(regulated)

Max.Output Current 10 A continuous(per module)

Input Voltage 85–264 V AC,47–63 Hz(universal)

Input Current~2.5 A 120 V AC;~1.3 A 240 V AC

Power Rating 240 W max

Redundancy Mode N+1 parallel redundant(load sharing)

Hot-Swap Support Yes–certified for live insertion/removal

Protection Features

Over-voltage protection(OVP)

Over-current protection(OCP)

Short-circuit protection(SCP)

Thermal shutdown||Status Indicators|

GREEN:AC OK

GREEN:DC OK

RED:FAULT

YELLOW:REDUNDANCY ACTIVE(load sharing confirmed)||Operating Temperature|0°C to+60°C(derating above 50°C)||Cooling|Convection-cooled(no fan)–ideal for hazardous areas||Mounting|Slides into I/A Series carrier/backplane(e.g.,F0400AU)||Certifications|CE,UL 61010-1,cULus,RoHS,ATEX(when installed in certified enclosures)||Dimensions|Standard I/A Series module:~267 mm H×40 mm W×depth fits carrier|

Technical Principles and Innovative Values

Innovation Point 1:True Load Sharing with Diagnostics

Unlike simple parallel PSUs,the P0500RU uses active current balancing and reports redundancy health—enabling predictive maintenance.

Innovation Point 2:Fanless Design for Harsh Environments

Eliminates moving parts,reducing failure risk in dusty,corrosive,or explosive atmospheres.

Innovation Point 3:Seamless Integration with I/A Series Architecture

Power status is visible in System Management Station(SMS)and Event Historian,enabling centralized asset health tracking.

Innovation Point 4:Brownfield Modernization Enabler

Allows legacy I/A Series systems(installed since the 1990s)to maintain high availability during phased digital upgrades.

Application Cases and Industry Value

LNG Terminal(Qatar):Uses P0500RU-powered I/O racks for cryogenic valve monitoring—zero unplanned outages in 8 years.

Pharmaceutical Plant(Switzerland):Meets GMP compliance with fully auditable power diagnostics from P0500RU via Foxboro Historian.

Coal-Fired Power Station(India):Retrofitted aging P0400 PSUs with P0500RU to support new FBM247 Ethernet I/O modules—extending DCS life by 10+years.

Related Product Combination Solutions

Compatible Backplanes:F0400AU,F0970,F0980

I/O Modules:FBM201–FBM247 series(analog,digital,comms)

Controllers:CP60,CP80,CP90

Engineering Tools:I/A Series Configuration Studio,System Management Station(SMS)

Successor Platform:EcoStruxure Foxboro DCS with Smart IO(but P0500RU remains in active support)

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