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Product Overview
The TK-PRR021 (Part Number: 51309288-275) is a specialized Redundancy Module (RM) for the Honeywell Experion PKS platform. It enables high-availability controller configurations by managing synchronization and seamless failover between primary and secondary C200 controllers. Through real-time data mirroring, this module ensures that hardware or power failures in the active processor do not disrupt industrial process continuity.

Designed for installation in a Series-A chassis, the TK-PRR021 occupies two slots and interfaces directly with the backplane to monitor the status of paired controllers. It is a critical component for safety-instrumented systems and high-uptime environments such as petrochemical refining, chemical processing, and large-scale power generation.


Technical Specifications

Feature Specification
Model Designation TK-PRR021 (51309288-275)
Alternative PWA Reference 51309283-300
Functional Category Redundancy Interface / Fault Tolerance Module
System Compatibility Honeywell C200 Controller / Experion PKS
Chassis Footprint 2 Slot Positions (Series-A)
Status Indicators Front-panel LEDs for module health and redundancy status
Environmental Rating Class I, Division 2, Groups A–D (T4A)
Operating Temperature -20°C to +60°C
Unit Weight 0.45 kg

Application Scenarios

  • Implementing redundant C200 controller pairs in DCS environments

  • Enabling fault-tolerant networking for mission-critical process loops

  • Ensuring zero-downtime control transitions in hazardous area installations


Frequently Asked Questions (FAQ)

Q: What is the difference between the TK-PRR021 and the TK-FTEB01?
A: The TK-PRR021 is a dedicated controller redundancy module for hardware-level failover, while the TK-FTEB01 serves as a Fault-Tolerant Ethernet (FTE) bridge for network-level redundancy.

Q: Does this module require external power?
A: No. The TK-PRR021 draws all required voltages (24V, 5V, 3.3V, and 1.2V) directly from the Series-A chassis backplane.

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