Honeywell TC-PRR021 Redundancy Module

Basic Overview

Core Technical Specifications

1. System Compatibility & Mechanical Installation

• Applicable system: Experion PKS C200 Series A control rack
• Rack slot occupation: Occupies 2 standard chassis slots
• Mounting: Vertical plug-in rack type, hot-swappable (RIUP online replacement without rack power-off)
• Net weight: 0.46kg
• Power supply: Powered by C200 backplane, operating voltage range 8.5~30VDC, max input current 15mA

2. Redundancy Synchronization Core Performance

• Real-time full data mirroring: Continuously synchronize control programs, PID parameters, setpoints, alarm states and I/O cache between primary/standby CPU
• Deterministic bumpless failover: Microsecond-level seamless switchover after main controller fault, no process loop interruption, no output jitter
• Hardware independent synchronization circuit, not relying on CPU software, high fault tolerance
• Supports hot standby running mode, standby processor keeps full real-time process image

3. Diagnosis & Indication

• Front panel multi-color LED indicators: Module running status, primary/secondary identification, synchronization normal/fault, link error alarm
• Real-time fault diagnosis uploaded to Experion HMI: Synchronization interruption, CPU heartbeat loss, module hardware failure, rack backplane communication abnormal

4. Environment & Certification

• Operating temperature: -20℃ ~ +70℃; storage temperature: -40℃ ~ +85℃
• Humidity: 5%~95%RH non-condensing
• Protection grade: IP20 (cabinet internal installation only)
• Certifications: CE, UL508, FM Class I Div.2 hazardous area certification

Key Functional Features

1. Dual CPU Redundancy Management Core
    
   It is the mandatory matching module for C200 redundant controller configuration; without TC-PRR021, master/standby CPU cannot realize automatic fault switchover.
2. Zero-loss data synchronization
    
   Continuous bidirectional data mirroring ensures the standby controller completely consistent with the main control state, avoiding production parameter loss during switching.
3. Complete fault self-diagnosis system
    
   Automatically monitor the health status of two CPUs and synchronization links, actively upload fault alarm signals to DCS operation station for maintenance prompt.
4. Online maintenance capability
    
   Can be pulled out and replaced when the rack is powered on, no need to stop the whole set of control system, reduce unplanned production downtime.
5. Compact integrated design
    
   Standard C200 rack unified module size, convenient spare parts inventory management, perfectly matched with C200 CPU, I/O modules and communication cards.

Matching Combination Scheme

• TC-PRR021 Redundancy Synchronization Module
• Dual TC-ODC01 C200 Control Processors (primary + standby pair)
• TC-PRS021 Rack Power Supervision Module
• TC-CNN01 ControlNet communication card

Application Scenarios

• Petrochemical refinery, chemical plant continuous process control cabinets
• Thermal power plant boiler, turbine high-reliability control system
• LNG storage, pharmaceutical, metallurgy critical production lines
• All process industries requiring dual redundant controller architecture to avoid production shutdown caused by CPU single-point failure