Technical Specifications DCS redundant system bus interface. Auxiliary working power 24 V DC, typical power consumption 2.7 W. Operating temperature 0 ℃ to +60 ℃, storage temperature ‑40 ℃ to +85 ℃, non‑condensing relative humidity 5%‑95%. Hardware‑based fast switching logic.
Functional Features Monitors operating status of main and standby redundant controllers. Executes hardware‑level bus switching action when main controller fault occurs. Maintains normal bus communication between standby controller and I/O modules. Front‑panel LED indicators display master‑standby working state and fault alarm. Built‑in hardware self‑diagnosis detects internal switching circuit abnormality.
Application Scenarios Redundancy switching spare unit for ABB DCS redundant control rack. Used for high‑reliability process‑control sites requiring non‑stop system operation.
Performance Parameters Ultra‑fast hardware switching speed. Zero interruption bus transfer performance. Reliable master‑standby status identification capability.
Material Composition Flame‑retardant plastic module housing. Multilayer glass‑fiber epoxy printed circuit board. Hardware logic switching assemblies and signal buffer circuits. Back‑plane plug‑in connector.
Structural Characteristics Standard DCS rack plug‑in module. Front side equipped with status LED indicators. Rear side fitted with back‑plane redundancy bus connector. Weight approximately 0.28 kg.
Working Principle GRBTU continuously receives status signals from main and standby controllers. When main controller generates fault signal, hardware logic immediately completes bus channel switching, the standby controller takes over all I/O bus communication work. Diagnosis circuit monitors switching circuit working condition in real‑time.
Installation Requirements Cut off DCS rack auxiliary power before replacement. Insert GRBTU 3BSE013175R1 into designated redundancy rack slot and lock fixing latch. Confirm back‑plane connector is fully engaged. Restore power supply, execute master‑standby redundancy switching test and verify system continuous operation performance.
Usage Notes Must be used in matching redundant controller rack configuration. Hot‑plug operation under powered condition is prohibited. Complete redundancy switch simulation test after module replacement.
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