Honeywell TC-PPD011 Experion C200 Battery Extension Module

Description

Product Introduction

The Honeywell TC-PPD011 (cataloged under assembly number 51309241-125) is a specialized Battery Extension Module (BEM) designed for the Experion PKS C200 controller chassis. Operating directly on the Control Processor backplane, its sole responsibility is preserving dynamic RAM data—including running control strategies, force lists, and historical trend buffers—whenever main 24 VDC system power drops out.

Unlike standard onboard lithium cells that only provide short-term memory retention, the TC-PPD011 expands hold-up duration significantly across multi-day shutdown windows. By housing high-capacity backup cells and monitoring circuitry, it prevents catastrophic loss of volatile memory. This eliminates the need for field engineers to perform tedious cold restarts or reload control databases from the Experion Server after a power interruption.

Key Technical Specifications

Application Scenarios & The “Trench” Experience

A severe lightning strike causes a site-wide blackstart at a chemical processing facility. Main UPS batteries hold for 30 minutes before collapsing entirely, leaving the C200 controller rack unpowered for 14 hours. When grid power returns, a depleted or missing memory backup module causes the main processor to boot up completely blank—wiping out execution memory and forcing a manual download of the entire control database. A clean, fully tested Honeywell TC-PPD011 BEM ensures the RAM contents remain 100% intact through extended power outages, allowing the C200 to execute an immediate, warm recovery the second 24 VDC returns.

• Continuous Chemical Processing: Protects complex PID loops, sequential function charts, and safety interlocks against unexpected site power drops.
• Oil & Gas Refining: Preserves real-time execution data and force tables in offshore or remote pipeline pump stations.
• Pharmaceutical Batching: Maintains critical batch phase state memory during emergency power transitions to generator backup.
• Power Generation Facilities: Prevents database corruption on balance-of-plant (BOP) C200 controller chassis during station blackouts.

TC-PPD011

TC-PPD011

TC-PPD011

Transparency SOP: Quality Assurance & Testing

1. Inbound Visual & Battery Cell Inspection: Inspect housing condition, verify backplane connector pin alignment, check circuit boards for electrolyte leakage, and inspect internal battery health.
2. Backplane Power-On Initialization: Slot module into an active C200 chassis; verify logic power rails, check initial self-test routines, and confirm status LED indicators.
3. Power Interruption Hold-Up Simulation: Charge module on a test rig, drop primary chassis power, and measure current draw/voltage degradation under simulated RAM memory load.
4. Alarm Relay Continuity Check: Trigger low-voltage condition states to verify that the internal dry contact alarm relay opens/closes reliably for DCS annunciation.
5. ESD & Protective Packaging: Install terminal covers, enclose inside static-shielded bags, and cushion with custom foam packaging before shipping.

The Veteran’s Tech Trap Guide (Crucial Value-Add)

• ⚠️ Check the Battery Expiration Date: Installing a TC-PPD011 with expired internal battery cells gives a false sense of security. The module status LED might show green while running on backplane power, but it will drop RAM immediately when main power cuts out.
• ❗ Wire the Alarm Relay Contacts: The front panel of the TC-PPD011 features dedicated alarm relay terminals. Always wire these contacts into a digital input card or DCS alarm point—if internal battery voltage drops low during normal operation, you want an early warning in the control room before a blackout happens.
• ⚠️ Do Not Pull Under Load Without Memory Verification: If you must swap out a TC-PPD011 module, ensure the main 24 VDC chassis power supply is online and healthy. Removing the battery module while chassis power is OFF will instantly wipe the C200 controller RAM.
• ❗ Handle Internal Cell Connectors with Care: When replacing internal battery packs during routine maintenance, take care not to pinch wiring or reverse polarity on the internal PCB headers—shorting the lithium cells will damage the onboard charging/monitoring circuit.

Frequently Asked Questions (FAQ)

Q: Is the Honeywell TC-PPD011 hot-swappable?

A: Yes, provided the main C200 chassis power supply is ON and stable. When the rack is powered via 24 VDC, the processor draws memory power from the backplane, allowing you to safely replace the TC-PPD011 module without losing RAM contents.

Q: What is the difference between TC-PPD011 and part number 51309241-125?

A: They refer to the exact same hardware assembly. TC-PPD011 is the model/catalog number used in Honeywell system documentation, while 51309241-125 is the physical manufacturing part number printed on the side label.

Q: How long will a healthy TC-PPD011 preserve C200 controller memory during a total blackout?

A: Hold-up time depends on processor RAM size and ambient cabinet temperature, but a fresh, fully charged TC-PPD011 module typically preserves memory for several days to weeks—far outlasting standard onboard backup capacitors.

Q: Does the module ship with fresh battery cells installed?

A: Yes. All pre-tested surplus and refurbished TC-PPD011 modules are supplied with verified, high-capacity internal batteries to guarantee out-of-the-box hold-up performance.

Q: What warranty coverage applies to this surplus module?

A: Every clean surplus and fully tested TC-PPD011 Battery Extension Module is backed by a full 12-month replacement warranty from the date of purchase.