Technical Specifications Rack back‑plane bus connector, external test port interface. No independent power supply. Operating temperature 0 ℃ to +60 ℃, storage temperature ‑40 ℃ to +85 ℃, non‑condensing relative humidity 5%‑95%.
Functional Features Derives partial back‑plane bus signal to external test port. Provides convenient test access for field maintenance and fault diagnosis. Does not change normal running signal of back‑plane bus. Supports connecting test instrument for on‑site signal inspection.
Application Scenarios Spare test port unit for ABB DCS control rack. Used for cabinet maintenance, fault diagnosis and module debugging work.
Performance Parameters High‑fidelity bus signal derivation performance, no interference to normal bus communication.
Material Composition Flame‑retardant plastic module housing. Multilayer glass‑fiber epoxy printed circuit board. Rack back‑plane plug‑in connector and external test port. Metal locking screw.
Structural Characteristics Standard rack plug‑in module structure. Rear connector connects to rack back‑plane bus. Front panel provides external test port interface. Metal locking screw for rack slot fixing.
Working Principle TP854 3BSE025349R1 is inserted into control rack slot. Internal circuit extracts back‑plane bus signal and leads to front‑panel external test port, without affecting normal data transmission of back‑plane bus. Maintenance personnel can connect test equipment to test port to acquire bus signal.
Installation Requirements Cut off rack power supply before replacement. Insert TP854 3BSE025349R1 into designated rack slot and tighten fixing screw. Restore rack power supply. When carrying out fault diagnosis, connect corresponding test instrument to front‑panel test port.
Usage Notes Do not connect non‑standard equipment to test port, avoid causing bus signal abnormality. Hot‑swap under powered condition is prohibited.
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