Description
Foxboro P0973LQ Network Power Supply – Stable DC Power for I/A Series Nodes and Control Cabinets
The Foxboro P0973LQ is a dedicated Network Power Supply designed to provide clean, regulated DC power to Foxboro I/A Series control nodes and baseplates. From my experience, what teams appreciate most is the straightforward drop-in form factor and the way it supports redundant architectures for higher availability. You might notice that, in many cases, it’s used to feed FBM/processor baseplates from a plant 24 VDC supply, keeping your DCS cabinets tidy and reliable.
Company’s Order Placement Process and Guarantees
- Warranty: 365 days
- Delivery: 1 week if in stock; no more than one month at the latest
- Payment: 50% advance payment; full payment prior to delivery
- Express options: FedEx, UPS, DHL
Key Features
- Regulated DC output for Foxboro nodes – Supplies clean power to I/A Series baseplates and network hardware, minimizing noise-driven faults.
- Redundancy-friendly design – Typically deployed in A/B redundant pairs to boost availability; changeover is seamless in most setups.
- Front-panel status indication – Clear LEDs for input OK, output OK, and fault make at-a-glance health checks fast during rounds.
- Industrial protection – Overcurrent and overvoltage protection help safeguard downstream modules and wiring.
- Cabinet-ready footprint – Compact, plug-in format for Foxboro enclosures reduces integration time and service risk.
- Quiet, stable operation – Low ripple output supports stable I/O measurements and controller uptime.
Technical Specifications
| Brand / Model | Foxboro P0973LQ (Network Power Supply) |
| HS Code | 8504.40 (Static converters / Power supplies) |
| Power Requirements | Typically powered from a 24 VDC plant/bulk supply; refer to the unit nameplate for exact input range and rating. |
| Output | Regulated DC rails for Foxboro I/A Series node/baseplate modules; low ripple, protected against overload. |
| Operating Temperature | Cabinet-mounted industrial range (commonly 0–50°C in many applications); verify by hardware revision. |
| Dimensions & Weight | Compact plug-in module for Foxboro enclosures; exact values per the specific hardware revision. |
| Signal I/O Types | DC power distribution to baseplate/network modules; no process I/O signals. |
| Communication Interfaces | Not applicable (power supply module). |
| Installation Method | Plug-in mounting in Foxboro I/A Series node/baseplate; commonly used in redundant pairs. |
Application Fields
The P0973LQ suits continuous process industries where stable DC power is critical to controller and I/O operation:
- Refining and petrochemicals – powering FBM I/O shelves and control processors in hazardous-area adjacent cabinets.
- Power generation – DCS cabinets for boiler, turbine, and balance-of-plant controls.
- Pharmaceuticals & specialty chemicals – clean, low-ripple supply for precise analog measurements.
- Pulp & paper, water treatment – robust operation in 24/7 utility environments.
Advantages & Value
- Reliability first – Regulated output and protective features help prevent nuisance trips and downstream damage.
- Redundancy without complexity – Supports A/B power architectures, which in many cases reduces unplanned downtime.
- Compatibility – Purpose-built for Foxboro I/A Series nodes; no guesswork on wiring or rail voltages.
- Lifecycle savings – Standard spares strategy across cabinets simplifies inventory and technician training.
- Serviceability – Front-facing indicators and plug-in replacement make maintenance faster during planned outages.
Installation & Maintenance
- Cabinet environment – Install in a clean, ventilated control cabinet. Maintain airflow and observe the module’s temperature limits.
- Power wiring – Use correctly sized, labeled 24 VDC input wiring with proper grounding. Isolate upstream with a dedicated breaker or fuse as per site standards.
- Redundant setups – For high availability, deploy in A/B pairs fed from independent DC sources when possible.
- Hot-swap practice – Some installations perform online replacement; follow Foxboro guidelines and site MOC procedures before attempting.
- Routine care – Quarterly visual checks for connector tightness, LED status, and dust buildup. Clean with dry air; avoid solvents.
- Records – Log input voltage, load current (if monitored), and replacement date to trend health over time.
Quick note from the field: a maintenance supervisor told us they swapped a P0973LQ during a short window on a crude unit; the redundant feed kept controllers live and the change took under 10 minutes, which seems to be typical when cabinets are well labeled.
Quality & Certifications
- CE marked; UL/CSA compliance is typical for Foxboro I/A Series power modules.
- RoHS conformity on later hardware revisions; confirm by exact part revision and nameplate.
- Manufacturer’s warranty applies; we provide a 365-day warranty on supply.
Common Companion Parts
- Foxboro I/A Series FBM baseplates and I/O modules (various models).
- Control processors and node interface modules used within the same cabinet.
- 24 VDC bulk power sources with appropriate upstream protection and monitoring.
If you’re standardizing spares, the P0973LQ typically fits well as a common power supply across multiple cabinets, which helps maintenance teams react quickly without overstocking niche parts.
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