Honeywell TC-BATT03 C300 System Backup Battery

Overview

The Honeywell 51199942-300 TC-BATT03, also cataloged as the TC-BATT03 C300 System Backup Battery, operates as a dedicated hardware component for maintaining controller memory retention and backup power functions within Honeywell C300 control system platforms.

Hardware Specifications

C300 Backup Power and Memory Retention Characteristics

The Honeywell TC-BATT03 provides a 3.6 V lithium backup power source for C300 controller memory retention functions. It supplies standby energy when the primary controller power source is unavailable. In addition, the battery maintains stored controller data and supports real-time clock continuity according to the C300 system design requirements.

The battery uses a low leakage current design with a standby current requirement below 5 uA controller leakage. Therefore, the module reduces long-term battery discharge during normal controller operation. The 2 200 mAh capacity supports extended backup service intervals under specified operating conditions.

For Honeywell process control installations, the battery operates as part of the controller hardware maintenance structure rather than a signal processing device. It does not provide 4-20 mA HART loop communication, FOUNDATION Fieldbus connectivity, or channel-to-channel isolation functions because it performs energy storage and retention support only.

Frequently Asked Questions

Q: What function does the Honeywell 51199942-300 TC-BATT03 provide in a C300 system?
A: The TC-BATT03 provides backup power for C300 controller memory retention and maintains stored data during loss of the primary power supply.

Q: What are the electrical ratings of the TC-BATT03 battery module?
A: The module provides a nominal voltage of 3.6 V with a capacity of 2 200 mAh and supports a trickle charge current of 15 mA.

Q: Can the TC-BATT03 be installed without considering environmental conditions?
A: No. The installation location should remain within the specified temperature range, and storage conditions should follow the -20 … +35 deg C long-term storage requirement.

Field Installation Guidelines

• Verify that the replacement battery model matches the Honeywell C300 controller battery specification before installation.
• Remove system power according to the controller maintenance procedure before accessing the battery connection area.
• Install the battery with correct polarity to prevent damage to the controller backup circuit.
• Keep battery wiring separated from high-voltage power cables and high-noise switching conductors.
• Maintain clean electrical contacts and avoid contamination on connector surfaces during replacement.
• Follow Honeywell C300 hardware documentation for final inspection and controller restart procedures.

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