Process Control Communication Solution – Foxboro P0971WV DNBT | I/A Series
Where This Product Is Used
The Foxboro P0971WV DNBT Dual Nodebus Module is a critical communication backbone component deployed across high-availability process industries. Engineers specify this module in the following environments:
- Oil & Gas Refineries – Redundant Nodebus links between FBMs and the Fieldbus Processor in continuous-process units where unplanned downtime costs exceed $100,000/hour.
- Chemical & Petrochemical Plants – Dual-path communication ensures loop integrity during single-bus faults in reactor control and distillation column automation.
- Power Generation (Fossil & Nuclear) – Turbine control and boiler management systems requiring IEC 61511 SIL-rated communication paths.
- Pulp & Paper Mills – Continuous digester and recovery boiler control where I/A Series DCS platforms are the installed base.
- Water & Wastewater Treatment – SCADA-integrated I/A Series nodes managing pump stations and chemical dosing with redundant bus topology.
- Pharmaceutical Manufacturing – FDA 21 CFR Part 11-compliant batch control systems built on Foxboro I/A Series infrastructure.
Technical Specifications
| Part Number | P0971WV |
| Model / Suffix | DNBT (Dual Nodebus Terminator) |
| Series | Foxboro I/A Series DCS |
| Function | Dual Nodebus communication module with integrated bus termination |
| Bus Architecture | Redundant Nodebus (primary + secondary) |
| Form Factor | Module – mounts in I/A Series FBM enclosure / baseplate |
| Weight | 3,120 g (approx.) |
| Manufacturer | Foxboro (Schneider Electric) |
| Condition Available | Refurbished / Tested / New Surplus |
Why Engineers Specify This Model
- Dual-Bus Redundancy – The DNBT suffix confirms integrated dual-path Nodebus termination, eliminating the need for external terminator hardware and reducing wiring complexity.
- Drop-In Replacement – Fully backward-compatible with existing I/A Series FBM baseplates; no firmware re-flash required in most revision-matched installations.
- Proven Field Reliability – The P0971 family has accumulated decades of runtime in tier-1 refineries and chemical complexes globally.
- Reduced Spare-Parts Inventory – A single P0971WV DNBT covers both bus paths, halving the SKU count in your critical-spares cabinet.
- Fast Swap-Out – Hot-swap capable within I/A Series architecture minimizes process interruption during maintenance windows.
Complete System Bill of Materials
For a fully redundant I/A Series Nodebus segment, engineers typically pair the P0971WV DNBT with:
- Foxboro FBM (Field Bus Module) – application-specific model (e.g., FBM201, FBM207)
- Foxboro CP60 / CP270 Fieldbus Processor
- Nodebus cable (shielded twisted-pair, per Foxboro PSS 21H-2Z1 B4)
- I/A Series enclosure / DIN-rail baseplate
- 24 VDC power supply module (Foxboro P0922VW or equivalent)
- Redundant power feed with automatic switchover relay
Contact Konmask.com for complete BOM sourcing assistance.
Compliance & Industry Standards
- Designed and tested to Foxboro I/A Series system specifications (PSS 21H series)
- Compatible with IEC 61131-3 control application environments
- Suitable for use in SIL 1/2 safety-instrumented system architectures (application-dependent; verify with SIS engineer)
- RoHS-compliant manufacturing (verify specific revision with Foxboro/Schneider Electric documentation)
- CE marked for EU industrial machinery directive compliance
Quality Assurance & Sourcing
- Functional Test – Every unit undergoes power-on and communication-path verification before shipment.
- Visual Inspection – PCB, connectors, and housing inspected for damage, corrosion, and counterfeit indicators.
- Traceability – Serial number and revision level recorded; documentation available on request.
- Packaging – ESD-safe anti-static bag + foam-lined carton; weight ~3.12 kg shipped.
- Warranty – 12-month replacement warranty against functional failure under normal operating conditions.
How to Source This Part
- Add to Cart – Click Buy Now for immediate checkout or Add to Cart to continue sourcing additional BOM items.
- Request a Quote – For volume orders (>3 units) or urgent AOG requirements, email support@konmask.com for priority pricing.
- Lead Time – In-stock units ship within 1–2 business days (DHL Express / FedEx International Priority available).
- Export Compliance – We handle EAR99 / ECCN classification and commercial invoice documentation for cross-border shipments.
Application-Specific FAQ
Q: Is the P0971WV DNBT compatible with both early and late revisions of the I/A Series FBM baseplate?
A: The P0971WV is designed for I/A Series FBM enclosures. Revision compatibility depends on your specific baseplate generation — contact us with your existing FBM model and revision for confirmation.
Q: Can this module be used in a non-redundant (single-bus) Nodebus configuration?
A: Yes. The DNBT module can operate on a single active bus path; the second path remains in standby. This is common during phased upgrades.
Q: What is the maximum Nodebus segment length supported?
A: Per Foxboro PSS documentation, standard Nodebus segments support up to 1,000 m with proper cable specification and termination — which this module provides on-board.
Q: Do you provide a test report or certificate of conformance?
A: Yes. A functional test report is available upon request. Certificate of Conformance (CoC) can be issued for orders of 2+ units.
Q: Can Konmask source other Foxboro I/A Series modules?
A: Yes — we maintain an extensive inventory of Foxboro FBMs, processors, and communication modules. Submit your full BOM to support@konmask.com.
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