Honeywell TC-PRS021 C200 Control Processor Module

Description

Key Technical Specifications

The Honeywell C200 documentation lists TC-PRS021 as the C200 Control Processor and describes the chassis as supporting plug-in processor, I/O-link, redundancy, FTE, fieldbus, and other control modules. It also specifies 4 MB of user memory.

Product Introduction

The Honeywell TC-PRS021 is the control processor for the C200 controller architecture used within Experion PKS. It provides the processing platform for control applications and coordinates communication with the controller’s associated I/O and communication modules. The unit is designed for both standalone and redundant C200 controller configurations.

TC-PRS021 is a legacy component, and current industrial-parts listings identify it as discontinued. The commonly associated replacement-identification numbers include 51404305-225 and 51404305-325. Because installations can contain application-specific firmware and configuration, replacing the processor should be treated as a controller-level maintenance task rather than a simple plug-in substitution.

TC-PRS021

TC-PRS021

TC-PRS021

Installation & Configuration Guide

Stage 1 — Pre-Installation Preparation (~5 minutes)

1. Place the process in its approved maintenance state and apply LOTO where required.
2. Confirm the replacement marking is TC-PRS021.
3. Record the processor’s complete part number, revision, and serial information.
4. Back up the current Experion PKS / Control Builder configuration.
5. Record controller redundancy status and chassis-slot position.
6. Photograph network, redundancy, and chassis connections.
7. Use ESD protection before handling the processor.

⚠️ Do not remove an active controller processor from a redundant system without confirming the current primary/secondary state.

Stage 2 — Removing the Existing Module (~5 minutes)

1. Verify that the controller is in the approved maintenance condition.
2. For redundant systems, identify the active controller and standby controller.
3. Confirm that the processor being removed is not currently executing the active control application.
4. Disconnect applicable connections according to the installation procedure.
5. Release the chassis retention mechanism.
6. Withdraw the TC- straight from its slot.
7. Inspect the backplane connector for contamination or damaged contacts.

Keep the original processor until the replacement has been commissioned successfully.

Stage 3 — Installing the Replacement (~5 minutes)

1. Confirm and the required hardware revision.
2. Check the chassis slot against the original system configuration.
3. Use ESD protection.
4. Carefully insert the processor into the designated slot.
5. Secure the module using the chassis retention mechanism.
6. Reconnect the required controller, network, and redundancy interfaces.
7. Confirm that no connector has been left partially seated.

⚠️ TC- and TK- should not be treated as interchangeable solely from the base model number. The documented model table distinguishes TC- as the uncoated version and TK- as the conformally coated version.

Stage 4 — Power-On & Testing (~10–15 minutes)

1. Verify the controller power supply before energizing.
2. Power the chassis according to the site procedure.
3. Check processor status indicators.
4. Confirm communication with the Experion engineering environment.
5. Verify the controller identity and chassis configuration.
6. Confirm the application configuration has been retained or restored.
7. Check I/O communication and controller diagnostics.
8. For redundant systems, verify primary/standby status.
9. Confirm control execution without immediately returning the process to full automatic operation.
10. Review alarms and diagnostics before final handover.

A replacement processor should not be considered commissioned simply because the module powers up. Application download, controller identity, I/O communication, redundancy state, and process-control execution all need to be verified.

Frequently Asked Questions (FAQ)

Q1. What is Honeywell TC-?

TC- is the Control Processor Module used in Honeywell’s Experion PKS control architecture. Honeywell documentation specifies it as a chassis-based processor with 4 MB of user memory.

Q2. Is TC- a controller?

Yes. More precisely, it is the Control Processor Module used to build a controller. The complete controller installation also includes the chassis, power, communication, I/O, and—where applicable—redundancy components.

Q3. What is the memory capacity of TC-?

The documented TC- provides 4 MB of user memory. The enhanced C200E controller uses a different processor model, Tx-PRS022, with increased user memory.

Q4. Does TC- support redundant controllers?

Yes. Honeywell’s installation documentation states that TC- can be used in both non-redundant and redundant controller configurations. A separate redundancy module and appropriate system configuration are required for redundant operation.

Q5. What is the difference between TC- and TK-?

The Honeywell model table identifies TC- as the uncoated model and TK- as the conformally coated model. The environmental requirements of the installation should therefore be considered before selecting between them.

Q6. Is Honeywell TC- obsolete?

It is a legacy/discontinued component. Current industrial automation parts references explicitly describe TC- as discontinued by the manufacturer.

For an operating /Experion PKS installation, this makes spare management important. Before a planned replacement, verify processor revision, firmware compatibility, application backup, and controller redundancy configuration.

Q7. What should procurement verify before ordering TC-?

At minimum, verify:

• exact model
• Complete Honeywell part number, such as 51404305-225
• Hardware revision
• Coated vs. uncoated construction
• Firmware compatibility
• Condition: new surplus, refurbished, or previously installed
• Battery condition, if applicable
• Functional test documentation
• Warranty
• Traceability and packaging

Do not accept a generic “Honeywell CPU” as an equivalent. The complete catalog number and revision should match the installed application requirements.