HONEYWELL TK-PRR021 Product Specification
1. Product Overview
The HONEYWELL TK-PRR021 is a high-availability redundant processor module designed for Honeywell TPS (Total Plant Solution) and Experion PKS control systems. As the core of fault-tolerant industrial control, it provides 1:1 hot standby redundancy to ensure uninterrupted operation of critical processes. This module is widely used in oil & gas, petrochemical, and power generation industries, where it executes control logic, processes real-time data, and enables seamless switchover between main and standby units to avoid production downtime.
Equipped with a high-performance 32-bit microprocessor and advanced redundancy management technology, the TK-PRR021 ensures data consistency between main and standby units with a switchover time of less than 10ms. It complies with IEC 61508 (SIL 2) standards, featuring strong anti-interference capabilities and stable performance under harsh industrial conditions such as voltage fluctuations and electromagnetic interference.
2. Technical Parameters & Specifications
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Category
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Details
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Product Type
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Redundant Processor Module (1:1 Hot Standby)
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Compatible Systems
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HONEYWELL TPS, Experion PKS Control Systems
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Core Processor
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32-bit RISC Processor, 500 MHz Clock Speed
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Memory Configuration
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Flash Memory: 16 MB; RAM: 32 MB (Expandable to 64 MB)
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Redundancy Performance
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Switchover Time: ≤10 ms; Data Synchronization: Real-time
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Communication Interfaces
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2×Ethernet (10/100 Mbps); 2×RS485; 1×Backplane Bus (1 Gbps)
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Power Supply
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From System Backplane: 5 V DC ±5%; Power Consumption: ≤25 W
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Environmental Ratings
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Operating Temp: 0°C–60°C; Humidity: 5%–95% (Non-Condensing); Vibration: ≤2 g
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Mechanical Dimensions
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175 mm × 120 mm × 35 mm (L×W×H); Backplane-Mounted
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Certifications
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IEC 61508 (SIL 2); UL 508; CSA C22.2 No. 14; CE; RoHS
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3. Key Features
3.1 High-Availability Redundancy
Adopts 1:1 hot standby redundancy design. The standby unit synchronizes data with the main unit in real time, and automatically switches to the main unit role within 10ms when a fault occurs (e.g., processor failure, communication interruption). This ensures zero data loss and uninterrupted process control, which is crucial for safety-critical scenarios like oil refinery reaction processes.
3.2 High-Speed Data Processing
The 500 MHz 32-bit RISC processor supports fast execution of complex control logic (up to 10,000 control loops per second). The expandable RAM (up to 64 MB) enables storage of large amounts of real-time data and historical logs, meeting the needs of large-scale industrial process control.
3.3 Reliable Fault Diagnostics
Built-in comprehensive self-diagnostic functions monitor processor status, memory integrity, and communication links in real time. Fault information is transmitted to the system monitoring platform through the backplane bus, supporting predictive maintenance and reducing the risk of unexpected failures.
4. Related HONEYWELL Products
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HONEYWELL TK-PRR031: Enhanced redundant processor with 1 GHz clock speed, suitable for high-speed control scenarios like semiconductor manufacturing.
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HONEYWELL TK-IOX161: 16-channel mixed I/O module, providing analog/digital signal conversion for TK-PRR021.
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HONEYWELL TK-RLY081: 8-channel relay output module, used for switching control of high-power equipment.
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HONEYWELL TK-MEM041: Memory expansion module, expanding TK-PRR021’s RAM to 128 MB for large data applications.
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HONEYWELL C200 Controller: Compact process controller, compatible with TK-PRR021 for medium-scale control systems.









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