Function and Positioning

Fiber-optic access
Provides 24 MT-RJ fiber-optic ports compatible with on-site multimode fiber links. Immune to electromagnetic interference, making it suitable for explosion-hazardous areas and remote I/O network connections.

Redundancy and high availability
Supports power redundancy, stacking redundancy, and dual-link redundancy. Key network nodes can be configured in dual-machine hot-standby mode to ensure uninterrupted network operation.

Traffic management and security
Implements QoS priority scheduling for control and alarm traffic. Supports ACLs, port security, and IEEE 802.1X authentication to prevent unauthorized access and meet DCS network isolation and security requirements.

Remote management and maintenance
Supports combined out-of-band and in-band management, enabling remote diagnostics, configuration backup, and firmware upgrades, significantly reducing operation and maintenance costs.

Typical Application Scenarios

Fiber-optic interconnection between field cabinets
Used to connect remote I/O stations, safety barriers, and intelligent field instruments. Replaces copper cabling to improve noise immunity and extend transmission distance.

Control room to explosion-proof zone boundary
Uses optical fiber to isolate hazardous and safe areas, complying with intrinsic safety and explosion-proof design requirements.

Redundant ring network architectures
When used with P0973JM / P0973JP modules, enables hybrid fiber-optic and copper redundant ring topologies, improving availability of critical control devices.

Long-distance network expansion
Equipped with SFP ports supporting single-mode optical modules, enabling transmission over several kilometers for cross-area communication in large industrial plants.

FOXBORO P0973JN｜Ethernet Switch｜