Foxboro DNBI(P0970BC) Dual Nodebus Interface Module

Technical Specifications

Model:DNBI(P/N P0970BC)

Brand:Foxboro

System compatibility:I/A Series DCS legacy system,dual redundant nodebus interface for control node

Function:Dual nodebus interface module,provides physical‑layer signal transceiving for redundant nodebus link between controller and system network

Installation:Rack slot insertion,gold‑plated edge‑connector interface connecting system backplane

Circuit feature:Dual independent nodebus transceiver channels for redundant communication

Diagnostic:On‑board LED indicator for nodebus link status,power‑on self‑diagnosis circuit

Protection:Transient surge absorption for nodebus signal lines

Environmental standard:Compliant with ISA‑S71.04 Class G3 industrial atmospheric condition

Housing:Multilayer PCB assembly,gold‑plated edge‑connector,rack mechanical retention fixture

Horizontal operating temperature:0℃ ~ +60℃

Vertical operating temperature:‑20℃ ~ +55℃

Storage temperature:‑40℃ ~ +85℃

Relative humidity:5%‑95% non‑condensing

Weight:0.51kg

Dimensions:338mm ×216mm ×18mm

Certification:CE,UL

MTBF:>82000 hours

Built‑in function

DNBI dual nodebus interface module serves as redundant physical‑layer communication hardware for legacy Foxboro I/A‑Series DCS control node. It implements bidirectional data transmission between controller backplane and dual redundant nodebus network. Dual‑channel design guarantees communication continuity when single bus channel fails. Surge‑absorption circuit protects internal logic from industrial field transient interference,widely applied for redundant nodebus communication fault replacement maintenance in petrochemical,chemical and power‑plant facilities.

Product Brief

DNBI(P0970BC) belongs to Foxboro I/A Series legacy DCS communication‑module spare‑part family,obsolete original rack‑slot inserted dual nodebus interface component. Must be fitted in matching I/A‑Series instrument rack slot. Widely used for original Foxboro DCS equipment maintenance and renovation. ESD anti‑static protection shall be followed during handling and installation.