Analog PA system for a legacy refinery section requiring retrofit without network infrastructure?

Industry: refinery | Architecture: ANALOG

Retrofitting PA in older refinery sections where no LAN infrastructure exists requires a practical analog approach using existing cable infrastructure. The BNA 500W power amplifier installed in the existing safe instrument room panel utilizes available 2-core cables in the cable trays to drive speakers in each of the three process units. BNA 7400 flameproof horn speakers replace any existing non-certified speakers in Zone 2 areas using the same cable routes — no new conduit needed. BNA 7301 outdoor IP65 horn speakers cover the process yard safe areas. BNA 6200 wall-mounted handset stations at each unit supervisor's panel replace old squawk boxes, providing reliable call capability. BNA 5200 desktop handset station at the control room allows the shift engineer to page all three units. This retrofit approach minimizes plant disruption and works within the existing electrical infrastructure.

Technical Details

Environment: old process unit block in existing refinery without LAN infrastructure
Constraints: no LAN, existing 2-core cable available, ATEX Zone 2 in some areas, minimal disruption
Requirement: basic zone paging retrofit for 3 process units using existing cable tray routes

Recommended Products

BNA 500W, BNA 5200, BNA 6200, BNA 7400, BNA 7301

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