Foxboro P0973LQ Evo Control Network Power Supply Module

Foxboro P0973LQ is a dedicated high-stability rack-mounted power supply exclusively developed for Foxboro Evo distributed control system, serving as the core power feeding unit for Evo 

MESH redundant control network switches, node controllers and network communication hardware.

It converts wide-range alternating current input into low-ripple, highly regulated 24VDC power, effectively suppressing grid voltage fluctuation, surge interference and harmonic noise to guarantee

 continuous stable power supply for critical DCS communication backbone. This unit supports A/B redundant parallel configuration with seamless automatic switchover; single power supply failure 

will not cause network breakdown or control system offline. Equipped with comprehensive internal fault detection and protection logic, it monitors overvoltage, undervoltage, overcurrent and 

overtemperature status in real time and outputs fault indication for maintenance troubleshooting. It is an indispensable key spare part for cabinet overhaul, power system upgrading and fault 

replacement in petrochemical, power plant and refining process control projects.

Technical Specifications

Part Number: P0973LQ

Manufacturer: Foxboro, brand under Schneider Electric, Origin: USA

Product Type: Evo Control Network Regulated Power Supply

AC Input Range: 100–240VAC, 50/60Hz, auto-sensing universal input

Rated DC Output: 24VDC, 20A, total output power 480W

Energy Efficiency: Up to 87% high conversion efficiency

Mounting Form: Standard 19-inch 1U rack installation

Front Panel Indicators: Power OK, Fault Alarm, Output Voltage status LEDs

Terminal Connection: Screw terminals for AC input & DC output wiring

Redundancy Mode: Supports N+1 redundant parallel hot backup operation

Operating Temperature: 0℃ ~ +50℃

Storage Temperature: -40℃ ~ +85℃

Ambient Humidity: 5%–95% Non-Condensing

Protection Functions: Overvoltage, undervoltage, overcurrent, short-circuit, overtemperature automatic lockout protection

Net Weight: Approx. 2.0kg

Protection Class: IP20 (indoor control cabinet installation)

Certification: CE, UL industrial safety compliance

Key Features

Wide universal AC input design, adaptive to unstable on-site industrial grid power environment, strong anti-surge and anti-harmonic interference capability.

Low ripple & noise 24VDC regulated output, ensuring clean power supply for sensitive industrial network equipment to avoid communication packet loss and link jitter.

Native redundant parallel compatibility, seamless master-standby switching without network interruption, improving overall DCS system availability.

Complete multi-level electrical protection mechanism to prevent damage to power supply and rear-end network devices under abnormal working conditions.

Intuitive front-panel LED diagnosis indicators, enabling field engineers to quickly judge power operation status and locate fault causes.

Compact 1U rack structure, easy cabinet layout arrangement, simple wiring and convenient on-site installation and replacement.

Industrial rugged internal circuit design, long-term stable continuous operation under high electromagnetic interference environment inside control rooms.

Exact original matching spare part for Foxboro Evo platform, fully electrical and mechanical compatibility for system expansion, renovation and spare inventory backup.

Application Scope

Power supply for Evo MESH redundant control network switches and core node equipment in thermal power, combined cycle power plant DCS system

Petrochemical refinery, chemical plant, oil & gas pipeline process control cabinet backbone network power unit

Offshore platform, LNG terminal, large compressor unit distributed control system network power configuration

Water treatment, flue gas desulfurization & denitrification automation control system power backup transformation project

Maintenance replacement, spare inventory reserve and technical upgrading for existing Foxboro Evo DCS control cabinets worldwide