ABB NBRA-669C – Redundant Network Bridge Module for Symphony/INFI 90 DCS

The ABB NBRA-669C is a redundant network bridge module typically used in Symphony/INFI 90 architectures to segment, extend, or interconnect plant network segments with high availability. From my experience with ABB Bailey platforms, NBRA‑series modules are chosen when you need a reliable way to maintain redundant communications across critical control areas without asking operators to change workflows. You might notice that it fits neatly into the existing rack and draws power from the backplane, so cabinet work stays minimal.

Company’s Order Placement Process and Guarantees

• Warranty: 365 days
• Lead time: In-stock items typically ship within 1 week; no more than one month at the latest
• Payment terms: 50% advance payment; full payment prior to delivery
• Express delivery: FedEx, UPS, DHL

Key Features

• Redundant network bridging – Designed to support dual-channel communications for higher availability across plant network segments.
• Backplane powered – No separate power supply; the module draws power from the system rack, which keeps wiring tidy.
• Rack-mounted simplicity – Installs in the standard ABB Symphony/INFI 90 rack, so retrofit work is typically straightforward.
• Diagnostics at a glance – Status indicators (commonly LEDs) help technicians verify link health and redundancy states quickly.
• Migration-friendly – Often used when modernizing legacy Network 90/INFI 90 networks while keeping existing field wiring intact.
• Industrial reliability – Built for 24/7 control-room conditions; in many cases these run for years with only routine inspections.

Technical Specifications

Related or Supporting Products

• INNIS21 – Network Interface Module typically used to connect INFI‑NET with operator/engineering networks; useful when you need console connectivity.
• INNPM12 / INNPM22 – Network Processing Modules that handle plant network management and redundancy, often paired in larger nodes.
• INICT03A – Computer Interface module for connecting engineering workstations or host systems to the ABB control network.
• NTAI05 / NTAO05 – Analog input/output modules in the Symphony/INFI 90 family, frequently found in the same cabinets as communication modules like NBRA‑669C.

One thing I appreciate is how the NBRA‑series sits alongside INNIS and INNPM modules to create a clean, redundant backbone. In many cases, this setup reduces nuisance failovers and simplifies fault isolation.

Installation & Maintenance

• Cabinet standards: Mount in an ABB Symphony/INFI 90 rack within a clean, dry control cabinet. Provide front access to indicators and rear access to connectors.
• Ventilation: Maintain adequate airflow; avoid blocking card spacing and observe the rack’s derating if the enclosure is warm.
• Wiring & media: Follow ABB INFI‑NET media and termination rules for redundant channels; keep bends gentle and ensure correct impedance where coax is used.
• Grounding & shielding: Bond shields at recommended points only to prevent ground loops; keep network and power cabling separated.
• ESD handling: Treat as sensitive electronics. Use a wrist strap and antistatic mats during insertion/removal.
• Routine checks: Inspect connectors, verify LED status and redundancy switchover behavior, and document firmware/hardware revisions alongside the rest of your node inventory.
• Firmware & backups: Where applicable, align firmware with the rest of the node and keep configuration backups. Many sites schedule a quick redundancy failover test during planned outages.

Quality & Certifications

• Certifications (typical): CE and UL Recognized for industrial control environments; ISO 9001 manufacturing processes. RoHS status can depend on production vintage.
• Warranty: 365 days from shipment
• Traceability: We record serial/firmware revisions where available to match your site documentation and MOC procedures.

Field feedback from a refinery customer: “Swapping in an NBRA module restored our redundant link without touching the field I/O. The diagnostics made it clear which leg had the issue, so downtime stayed under an hour.”