Product Overview

The Honeywell TK-PRR021 is a high-reliability hardware component engineered to facilitate failover synchronization within the Experion PKS and TDC 3000 Distributed Control Systems (DCS). Specifically designed for the C300 controller series, this module enables a dual-processor architecture where a secondary unit stands ready to take over process execution instantly should the primary unit encounter a fault. By managing the high-speed data exchange between paired controllers, the TK-PRR021 ensures a "bumpless" transfer, meaning industrial processes continue without interruption or loss of state. Its design allows for direct side-attachment to the controller base, preserving valuable cabinet space while providing a robust backbone for mission-critical automation loops.

Technical Performance and Hardware Profiles

• Operational Role: Controller Failover and Redundancy Management

• System Voltage: Supports up to 24V DC power distribution

• Interface Design: Direct-mount side connection (Non-chassis dependent)

• Status Monitoring: Integrated diagnostics for primary/backup health tracking

• Switchover Logic: Sub-millisecond "bumpless" transfer capability

• Compatibility: Honeywell Experion C300 / TDC 3000 Systems

• Physical Weight: 0.46 kg

• Unit Dimensions: 6.9 x 14.1 x 14.5 cm

• Manufacturing Origin: USA

• HS Tariff Classification: 8537101190

• Module Condition: Brand New Factory Stock

Industrial Resilience Scenarios

The TK-PRR021 is an indispensable asset for heavy industries where even a few seconds of downtime can result in significant financial loss or safety hazards. In petrochemical refineries and offshore oil platforms, it manages the redundancy for critical safety interlocks and valve controls. Within power generation facilities, it ensures the continuous monitoring of turbines and boilers by maintaining the active state of the control database across dual controllers. Its ability to support both redundant and non-redundant power configurations provides engineers with the flexibility to design resilient infrastructures tailored to specific risk profiles, ensuring maximum uptime for complex, high-throughput manufacturing environments.

FAQ

Q: Does the TK-PRR021 require a dedicated slot in the I/O rack?

A: No, the TK-PRR021 is designed to connect directly to the side of the C300 controller or its carrier, which allows you to implement redundancy without consuming a standard chassis or I/O slot.

Q: What happens to the process during a switchover managed by this module?

A: The module facilitates a "bumpless" transfer, meaning the backup controller has a real-time copy of the primary controller's memory. The transition is instantaneous, and field actuators do not see any change in signal.

Q: Can the TK-PRR021 be used with older TDC 3000 equipment?

A: Yes, this module is engineered for cross-compatibility between the legacy TDC 3000 architecture and the modern Experion PKS C300 controller platform, providing a reliable bridge for system upgrades.

Q: Is the module hot-swappable if it needs to be replaced?

A: Yes, in a fully redundant configuration, the TK-PRR021 and its associated controllers are designed to be serviced or replaced while the other half of the pair maintains process control, preventing system-wide downtime.

Q: How does the module indicate which controller is currently the primary?

A: The module features visual indicators that work in tandem with the C300 controller's display to show the active/ready status of the redundant pair, allowing for quick visual verification by technicians.