HONEYWELL TC-PRR021

Description

Product Description

HONEYWELL TC-PRR021 is a Power Supply and Relay Module for a Honeywell control system, most commonly used in Fire Alarm Control Panels (FACP) or Building Management System (BMS) controllers. This integrated module serves two essential functions: it provides clean, regulated DC power to the system’s logic boards and field devices, and it offers multiple Form-C relay outputs for controlling external equipment. The primary function of the HONEYWELL TC-PRR021 is to act as the robust power conversion and high-current switching hub within a panel. It ensures the control electronics receive stable voltage while executing physical commands (like starting a fan or unlocking a door) via its isolated relay contacts based on signals from the main CPU. The reliability of this combined unit is critical for the continuous operation and functional execution of life safety or building control systems.

Product Parameters / Technical Specifications

• Manufacturer: Honeywell (Building Technologies or Fire & Security Division)
• System: Honeywell Fire Alarm (e.g., Notifier) or BMS Control Panel
• Functional Designation: Power Supply & Relay Module
• Input Voltage: Accepts primary AC input (typically 120VAC or 240VAC) and includes connections for a 24VDC or 12VDC backup battery.
• Output Voltages: Provides one or more regulated DC output voltages (commonly 24VDC and 5VDC) to power system boards, detectors, and auxiliary devices.
• Output Current: Rated for a specific amperage (e.g., 3A, 6A total) to support the panel’s connected load.
• Relay Outputs: Contains multiple Form-C (SPDT – Single Pole Double Throw) electromechanical relays. Each relay has Normally Open (NO), Normally Closed (NC), and Common (C) contacts.
• Relay Ratings: Each relay contact is rated for a specific switching capacity (e.g., 5A @ 30VDC resistive, 2A @ 120VAC).
• Supervision: Monitors AC power presence, battery health, and may provide fault detection for the power supply circuit.
• Mounting: Designed as a slide-in module for a specific panel backplane or chassis.
• Certifications: Carries vital safety certifications such as UL 864 (for fire alarm control units) and may be UL 508 listed for industrial control equipment.

Advantages and Key Features

• Integrated and Compact Design: Combines two critical panel functions (power and switching) into one space-saving, pre-engineered module, simplifying cabinet layout and wiring.
• Life-Safety Grade Reliability: Engineered and certified for use in fire alarm systems, meaning it meets stringent standards for operational integrity and fail-safe behavior, which is a key advantage of the HONEYWELL TC-PRR021.
• Versatile Relay Control: The Form-C relay contacts provide maximum flexibility (NO or NC operation) and can switch a wide range of AC/DC voltages, making them ideal for interfacing with diverse building equipment like HVAC dampers, door holders, or elevator recall circuits.
• Supervised Power Path: Continuously monitors the status of primary (AC) and secondary (battery) power, providing system alerts for failures to ensure backup power engagement.
• Plug-and-Play System Integration: Designed to connect directly to the panel’s proprietary backplane, ensuring correct voltage, current, and communication with the main controller. This guarantees compatibility and ease of replacement.

Application Cases in Industry

• Fire Alarm Control Panel (FACP) Auxiliary Control: A primary application. The TC-PRR021 provides power for ancillary circuits and uses its relays to execute fire safety functions like HVAC shutdown (smoke control), elevator capture/release, magnetic door holder release, and fan activation based on commands from the fire alarm CPU.
• Building Automation System (BAS) Integration: Used in Honeywell BMS panels to power the controller and provide relay outputs for discrete control of pumps, valves, lighting circuits, or alarm annunciators.
• Notification Appliance Circuit (NAC) Power: May supply or supplement power for audible/visual notification devices (horns, strobes) in the fire alarm system.
• Industrial Monitoring Panel: Can be deployed in custom industrial control panels where a reliable, supervised power source and isolated relay outputs are needed for machine safety interlocks or process shutdown sequences.

Comparison with Competing Products

Selection Suggestions and Precautions

1. Verify Exact Panel Compatibility: The HONEYWELL TC-PRR021 must be listed for use with your specific fire alarm or BMS panel model (e.g., Notifier NFS-3030, Honeywell JACE). Using an incompatible module violates the system’s listing and can cause operational failure.
2. Confirm as a Direct Replacement: For spare parts, the part number must match the label on the failed module exactly. For new panels, it must be on the approved Bill of Materials (BOM).
3. Respect Relay Load Ratings: Before connecting field devices, verify the relay contact ratings (voltage AC/DC, current resistive/inductive). Do not exceed these ratings. Inductive loads (contactors, solenoid valves) may require external snubbers.
4. Follow Strict Electrical Safety Procedures: Installation involves live AC mains and battery connections. De-energize the panel and follow Lockout/Tagout (LOTO) procedures. Only qualified personnel should perform this work.
5. Proper Battery Handling: If the module manages battery backup, ensure the replacement batteries are the correct voltage and ampere-hour (Ah) rating. Connect with correct polarity and secure terminals.
6. Sourcing from Authorized Life-Safety Distributors: This is a potential life-safety component. Purchase the TC-PRR021 exclusively from authorized Honeywell Fire & Security or Building Solutions distributors. They guarantee genuine, certified parts and provide the necessary technical documentation. Gray-market parts carry unacceptable risk.

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