Product Core Brief
- Model: P0973LQ
- Brand: Foxboro (Invensys / Schneider Electric)
- Series: I/A Series / Foxboro Evo Distributed Control System (DCS)
- Core Function: Serves as the central processing unit for executing real-time control logic, data acquisition, and network coordination within the I/A Series architecture.
- Product Type: Core Control Processor / CPU Module
- Key Specs: 32-Bit RISC | Hot Standby Redundancy | 100Mbps Ethernet | Part Number
- Condition: New Original (New Surplus) | Factory Sealed
Key Technical Specifications
| Parameter | Value |
|---|---|
| Module Type | Core Control Processor (CPU) |
| System Platform | Foxboro I/A Series / Foxboro Evo |
| Processor Architecture | 32-Bit Industrial RISC |
| Instruction Speed | 0.1 µs/Boolean, 0.5 µs/Floating Point |
| Memory Capacity | 8 MB Program, 4 MB Data |
| Communication | 100Mbps Ethernet, ControlNet, RS-232 |
| FBM Capacity | Up to 32 (Expandable to 128 via FEM100) |
| Redundancy | Hot Standby Controller & Power Supply |
| Power Supply | 24VDC, 10W Consumption |
| Environmental Rating | IP20, G3 Harsh Environment (0°C to 60°C) |
| Condition | New Original (New Surplus) |
| Warranty | 1-Year Functional Warranty |
FOXBORO P0973LQ
Product Introduction
Maintaining deterministic control and high availability in critical process applications requires a processor that balances raw speed with fault tolerance, and the is engineered to deliver exactly that. As the core control processor for the I/A Series and Foxboro Evo networks, this module executes complex regulation, logic, and sequential control while managing high-speed data exchange across the control network.
Built for continuous industrial duty, the features a 32-bit RISC processor capable of executing boolean instructions in just 0.1 microseconds. Its dual-module parallel architecture supports seamless hot standby redundancy with bit-by-bit data matching, ensuring that if a hardware fault occurs, the backup controller assumes control without interrupting the process or losing data integrity.
Key Selling Points & Differentiators
- High-Speed RISC Processing: Delivers deterministic scan times with 0.1 µs boolean execution and 8 MB of program memory, easily handling complex PID loops and advanced control strategies.
- Hot Standby Redundancy: Features dual-module parallel operation with bit-by-bit data matching, guaranteeing seamless failover and continuous plant operation during hardware faults.
- Scalable I/O Architecture: Natively supports up to 32 Series 200 FBMs, expandable to 128 FBMs using the FEM100 expansion module for massive distributed I/O requirements.
- Verified Functionality: Every undergoes a 24-hour live load test on a dedicated I/A Series test rack before shipping, complete with a signed test report.
- Not Recommended For: Do not use this module as a simple I/O card or standalone PLC. It requires an I/A Series node baseplate and is intended for system-level process control.
- Stock Availability: Current inventory is factory-sealed new surplus with traceable lot numbers; typically ships within 48 hours of order confirmation.
- Warranty Backed: Includes a 1-year functional warranty covering manufacturing defects and DOA conditions, with no restocking fees for verified failures.
FOXBORO P0973LQ
FAQ
Yes. All units in stock have passed our 24-hour live bench test and include a signed test report. We ship same-day for orders placed before 2 PM EST, so you’ll have tracking before end of day.
The is designed for standard I/A Series FCM/FBM baseplates. However, verify your baseplate revision and node firmware first to ensure proper recognition of the processor’s memory and redundancy features. Send us your baseplate part number, and we’ll confirm compatibility within 30 minutes.
How does the hot standby redundancy actually work?
The controller operates in a dual-module parallel architecture. The primary and backup processors run simultaneously, using bit-by-bit matching to verify data consistency. If the primary fails, the backup seamlessly assumes control without dropping the control network or resetting I/O states.
Do I need to reconfigure the module after installation?
No. The retains its configuration in the I/A Series node processor. Simply plug it into the same slot, and the system will recognize it. However, always verify redundancy settings and network IP addresses in your DCS configuration tool after replacement.
What if the module fails within the warranty period?
We offer a no-questions-asked replacement for any verified manufacturing defect. Ship the failed unit back with your RMA number, and we’ll send a replacement within 24 hours of receipt. We also provide a loaner program for critical control nodes to minimize downtime.
Can this processor handle high-interference environments?
Yes. The features a die-cast aluminum enclosure rated for G3 harsh environments (high dust, strong EMI). However, ensure your control panel is properly grounded and that Ethernet/fieldbus cables use shielded twisted-pair with correct termination.
Is this a refurbished or new surplus unit?
This is New Original (New Surplus) – factory sealed, never installed, with full traceability to the original manufacturing lot. It is not refurbished, repaired, or pulled from a decommissioned system. We provide the original manufacturer’s lot code upon request for your quality records.
Quality Transparency SOP
- Incoming Verification: Source traceability confirmed via lot code; anti-counterfeit visual inspection; serial number cross-referenced with OEM records; accessories verified.
- Live Bench Test: Dedicated I/A Series test rack; power-on self-check; redundancy failover simulation; network communication handshake test; 24-hour continuous load test; signed test report generated.
- Electrical Tests: Insulation resistance verified at 500V megger (>10 MΩ); ground continuity confirmed; 24VDC power supply stability validated.
- Firmware Verification: Firmware version recorded; redundancy and communication stack configuration backed up and documented.
- Final QC & Packaging: QC sign-off; anti-static seal applied; shock protection installed; QC Passed label affixed with date and inspector ID.
Test photos and video available upon request. We never claim “100% failure-free” – we provide verified, tested units with documented performance.
Technical Risk Avoidance
- Firmware Mismatch: Risk: Redundancy failure or communication dropouts. Prevention: Verify the node processor firmware supports the revision. Field Note: We’ve seen standby controllers fail to sync because the primary and backup had mismatched firmware revisions. Always check the version.
- Baseplate Seating: Risk: Intermittent network communication. Prevention: Ensure the module is fully seated and locked onto the baseplate. Field Note: A partially seated processor caused random control network timeouts during plant vibration. Push firmly until the latch clicks.
- Redundancy Sync Failure: Risk: Backup controller not tracking primary. Prevention: Verify bit-by-bit matching is enabled and network latency is within spec. Field Note: A noisy Ethernet segment caused sync packets to drop, defeating the redundancy. Check your network cabling.
- Power Supply Undersizing: Risk: Controller resets during high-load scans. Prevention: Verify the 24VDC power supply can handle the processor plus all attached FBMs. Field Note: Adding too many FBMs caused voltage sag, triggering random processor reboots. Calculate your power budget.
- ESD Damage: Risk: Silent processor failure. Prevention: Use grounded wrist strap and anti-static mat during handling. Field Note: We’ve tested processors that passed power-on but had corrupted memory after 48 hours due to ESD. Handle with care.
