Model Explanation

TC = Series C; PRR = Redundant Processor; 021 = Version, Spare Part Number 51309288-225. Technical Specifications

24VDC operating current: 90mA. Backplane power supply for 5V/3.3V; Built-in dedicated high-speed redundant bus; Switching time < 5ms; Non-disturbance process transition; Operating temperature range: -20℃ to +70℃; Net weight: 460g.

Interface and communication configuration

Panel operation, fault, and master-slave synchronization indicator lights; Side redundant dedicated optical fiber / wiring interface connects two main controllers; Backplane connects to the IOTA base, and internal buses and dual CPUs exchange data.

Core functions

Real-time logic, I/O, and parameter full-scale mirroring synchronization of master and standby controllers; Master CPU failure automatically switches to standby; Fault status uploads to the upper system for diagnosis; Supports live plug-and-play replacement of the rack, and automatically synchronizes data after replacement. Applicable scenarios

All critical process DCS that require CPU redundancy: Hydrogenation unit, large-scale unit ESD associated control, power plant main equipment control system, main control of continuous chemical production lines.

Operating and Maintenance Instructions

Only applicable to the paired TC-PRS021 redundant configuration. A single CPU does not require configuration; redundant connection lines are originally equipped with special cables by the manufacturer and replacement with ordinary wires is prohibited; pay attention to abnormal alarm of the synchronization indicator light during inspection.