Product Overview

The Honeywell CC-PCNT02 (51454551-275) is a high-performance C300 Control Processor designed for the Experion PKS Series C platform. While it shares the same core control logic as the Series 8 (8C) models, the Series C version is distinguished by its horizontal form factor and its integration with the Series C Input Output Termination Assembly (IOTA). As the "brain" of the DCS, the CC-PCNT02 executes regulatory control, high-speed logic, and sequential batch procedures. This specific part number, 51454551-275, indicates that the unit is G3 Conformal Coated, providing a robust defense against corrosive atmospheric contaminants in industries like refineries, pulp and paper, and chemical processing.

Technical Configuration

The CC-PCNT02 architecture is engineered for extreme availability and high-speed data processing.

• Series C Horizontal Design: Optimized for horizontal rack mounting, interfacing with the IOTA via a high-density multi-pin connector for stable communication and power distribution.

• Fault Tolerant Ethernet (FTE): Utilizes dual-redundant FTE ports for secure, high-speed communication between the controller, servers, and other peer nodes on the network.

• G3 Conformal Coating: The "275" suffix ensures the internal circuitry meets ISA S71.04 Class G3 standards, protecting against corrosion from H2S, Cl2, and high humidity.

• Deterministic Execution: Supports a configurable Control Execution Environment (CEE), allowing loop execution periods as fast as 50 ms for critical process responses.

• Native Redundancy: Supports 1-to-1 hardware redundancy. In a redundant pair, the secondary controller maintains a real-time "mirror" of the primary's memory for an instantaneous, bumpless failover.

Technical Specifications

Technical FAQs

What is the difference between the CC-PCNT01 and the CC-PCNT02?

The CC-PCNT02 is a modernized hardware revision that provides improved memory management and increased internal processing efficiency. It is the standard replacement for the older CC-PCNT01 in most Experion systems.

Can I mix a CC-PCNT01 and CC-PCNT02 in a redundant pair?

No. Redundant pairs must consist of identical hardware versions (e.g., two PCNT02 units) to ensure synchronization and identical execution timing.

Does the CC-PCNT02 support Series 8 (8C) I/O?

Yes. Through the I/O Link communication, a Series C C300 controller can manage Series 8 I/O modules, provided the software version and I/O Link topology are correctly configured in the Experion Control Builder.

Engineering & Installation Guide

• IOTA Mounting: Ensure the CC-PCNT02 is firmly seated into the Series C IOTA and the locking mechanisms are fully engaged. A loose connection at the IOTA interface is a common cause of "Module Missing" or "I/O Link Failure" alarms.

• Redundancy Cabling: For redundant configurations, the redundancy cable must be connected between the primary and secondary IOTAs. Always verify "Synchronized" status in the System Status Display (SSD) before performing any hardware maintenance.

• Network Wiring: Use only Honeywell-certified FTE cables. Ensure that the "Yellow" and "Green" networks are physically isolated to maintain true fault tolerance. Incorrect cross-cabling will result in a "Secondary Network Failure" alarm.

• Data Retention: While the CC-PCNT02 uses non-volatile RAM, it is best practice to perform a "Checkpoint to Flash" after any major strategy change to ensure the controller can recover autonomously after a total power loss.