Honeywell TC-PRR021 | I/O Rack Power Supply, OEM Stock

Description

Product Introduction

The Honeywell TC-PRR021 is a power supply module designed for the Series C I/O racks used with the C300 controller in the Experion Process Knowledge System (PKS) distributed control system. This module provides regulated 24 V DC power to I/O modules mounted in the rack, ensuring stable operation of field interfaces, communication circuits, and diagnostic functions. The TC-PRR021 mounts directly into the Series C I/O rack and accepts either AC or DC input depending on configuration.

The Experion PKS platform is Honeywell’s flagship DCS for process industries, and the Series C I/O system represents the current-generation I/O architecture. The TC-PRR021 is a critical component for any Series C rack, providing power to I/O modules such as analog input cards (CC-PAIX02), digital output cards (CC-PDOX01), and communication adapters. For high-availability applications, the TC-PRR021 supports 1:1 redundancy with automatic failover, ensuring continuous power to I/O modules in the event of a single power supply failure.

Key Technical Specifications

Key Selling Points & Differentiators

• Redundant Operation: Supports 1:1 power supply redundancy. When two TC-PRR021 modules are installed in a rack, they automatically load-share and provide bumpless failover if one supply fails. No external switching hardware required.
• Hot-Swap Capability: Replace a failed power supply without powering down the I/O rack. The redundant supply maintains power to all I/O modules during the swap. For simplex configurations, replace during planned downtime.
• Wide Input Range: Accepts 100 to 240 V AC, allowing direct connection to plant power without step-down transformers. DC input versions are available for facilities with 125 V DC or 250 V DC distribution.
• Integrated Diagnostics: LED status indicators on the front panel provide immediate visual confirmation of power good, fault conditions, and redundancy mode. Diagnostic status is also available to the C300 controller for remote monitoring.
• OEM Authenticity: Each unit undergoes visual inspection for Honeywell branding, serial number traceability, and factory packaging verification. We do not sell counterfeit or unauthorized product.

Frequently Asked Questions (FAQ)

Q: Is the TC-PRR021 compatible with all Series C I/O racks?
Yes. The TC-PRR021 is designed for the Series C I/O rack family, which includes racks such as the CC-TCF901 (9-slot), CC-TCF911 (15-slot), and CC-TCF921 (24-slot). It mounts in the dedicated power supply slots at the left end of the rack. Verify your rack model to ensure proper fit.

Q: Can I mix AC and DC input versions in a redundant configuration?
Yes, but with limitations. The TC-PRR021 accepts AC input in its standard configuration. A DC input version is available as a separate variant. For redundant configurations, both power supplies must be the same input type. Mixing AC and DC inputs in the same rack is not supported and may result in improper operation or damage.

Q: What is the difference between the TC-PRR021 and the TC-PRR021-1?
The TC-PRR021-1 is a variant with additional surge protection and filtering for applications in harsh electrical environments. The standard TC-PRR021 is suitable for most industrial installations. If your facility experiences frequent power disturbances or lightning exposure, the -1 variant is recommended. We stock both; confirm your existing part number before ordering.

Q: Does this power supply provide power to field devices?
No. The TC-PRR021 powers only the I/O modules and rack electronics. Field devices such as transmitters, valves, and sensors require separate external power supplies connected at the termination assemblies. This is standard practice for Honeywell I/O systems and allows independent power distribution for field devices.

Q: How do I configure redundancy on the TC-PRR021?
Redundancy is automatic. Install two TC-PRR021 modules in the designated power supply slots of the Series C rack. The rack backplane handles the redundancy logic automatically. No configuration is required in the C300 controller or Experion engineering software. Both supplies will share the load, and if one fails, the other continues without interruption.

Q: What is the maximum number of I/O modules a single TC-PRR021 can support?
The maximum depends on the power consumption of the I/O modules installed. The TC-PRR021 provides 120 W (5 A at 24 V). Sum the power consumption of all I/O modules in the rack (available in each module’s datasheet) to ensure the total does not exceed 120 W. For high-density racks, we recommend using redundant power supplies to provide additional capacity and fault tolerance.

Q: What testing do you perform before shipping?
For new factory-sealed units, we do not break the seal to maintain OEM warranty eligibility. Our QC process includes visual inspection of packaging integrity, verification of the TC-PRR021 part number against Honeywell specifications, and anti-counterfeit checks including serial number validation. For units where testing is requested, we perform power-on verification of output voltage, load testing, and redundancy functionality (if two units are ordered). A test report is available upon request.

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