TC-BATT03 Controller Battery Module | Honeywell

Configured for volatile RAM retention and controller backup power execution in Honeywell Experion PKS and TDC 3000 platforms, the Honeywell TC-BATT03 (TC-BATT03 Controller Backup Battery) provides direct physical/electrical execution.

Hardware Specifications

Cold Junction Compensation and Channel Isolation Features

The TC-BATT03 connects directly to the controller power subsystem to maintain SRAM configuration memory and real-time clock integrity during main supply interruptions. Integrated galvanic isolation across the power bus prevents high-voltage transients on adjacent field I/O racks—such as those handling 4-20 mA HART loops or thermocouple inputs requiring cold junction compensation (CJC)—from compromising internal battery charging circuitry or inducing power bus noise.

Frequently Asked Questions

Q: What is the functional behavior of the TC-BATT03 during a total main power outage?

A: The battery delivers immediate DC backup voltage to the controller memory bus, preserving runtime parameters, diagnostic logs, and volatile configuration data without dropping the system logic state.

Q: Is the TC-BATT03 unit a rechargeable battery assembly?

A: Yes. The module houses a sealed rechargeable industrial cell pack that automatically trickle-charges when primary controller backplane power is active.

Q: What precautions should be taken regarding thermal exposure in the control enclosure?

A: Operating the battery assembly continuously above specified ambient temperature limits accelerates cell capacity degradation. Forced-air cooling within the cabinet enclosure is recommended to maximize battery service life.

Field Installation Guidelines

• Ensure primary power to the controller rack is isolated or strictly adhere to industrial live-maintenance protocols prior to replacing the battery unit.
• Align the module chassis carefully with the mounting slot to ensure complete mechanical engagement and electrical polarization.
• Verify proper seating of the power harness connector to prevent micro-arcing and unstable voltage delivery to the volatile memory bus.
• Ground the control enclosure using a dedicated, low-impedance ground strap connected to the main station ground bar to prevent static discharge into the battery terminals.
• Do not expose the battery pack to direct mechanical impact, short-circuit conditions, or temperatures exceeding standard industrial operational thresholds.