Technical Specifications Redundant bus signal interfaces, rack back‑plane auxiliary power acquisition. Operating temperature 0 ℃ to +60 ℃, storage temperature ‑40 ℃ to +85 ℃, non‑condensing relative humidity 5%‑95%. Built‑in bus status monitoring circuit.
Functional Features Provides active impedance matching termination for redundant communication bus. Suppresses bus signal reflection and interference noise. Front‑panel LED indicators display bus termination working status. Built‑in monitoring circuit detects bus signal abnormal condition.
Application Scenarios Spare active termination module for ABB redundant DCS control rack. Installed at terminal position of redundant control bus.
Performance Parameters Stable active termination output performance. Reliable redundant bus signal quality improvement characteristic.
Material Composition Flame‑retardant plastic module housing. Multilayer glass‑fiber epoxy printed circuit board. Active termination circuit, signal monitoring assemblies. Rack back‑plane plug‑in connector and bus signal interface.
Structural Characteristics Standard rack plug‑in module structure. Rear connector connects to rack back‑plane for auxiliary power. Front panel is equipped with redundant bus signal interfaces and status LED indicators. Metal locking screw for rack slot fixing.
Working Principle TP867 obtains auxiliary power from rack back‑plane bus. Active termination circuit provides accurate impedance matching for redundant bus terminal, absorbs reflected signal. Monitoring circuit real‑time detects bus signal quality and outputs status indication via LED.
Installation Requirements Cut off rack power supply before replacement. Insert TP867 into designated rack slot and tighten fixing screw. Connect redundant bus cable signal to front‑panel interface. Restore rack power supply, observe status LED, verify redundant bus communication function.
Usage Notes Install only at physical terminal of redundant bus segment. Hot‑plug under powered condition is prohibited. Bus wiring must follow system design requirement.
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