Description

The GE DS200TCCBG3B is a Common Extended Analog I/O (TCCB) board developed for the Speedtronic Mark V turbine control system. It provides signal scaling, conditioning, and analog-to-digital processing for auxiliary instrumentation inputs and outputs routed through the <R5> core terminal boards (such as the TBCB) and the <P1> core TCEB card assemblies.

Commercial Availability & Procurement

• Condition: New Surplus (Factory Sealed) or Refurbished (Fully Bench-Tested, Cleaned, and Recalibrated)
• Warranty: 12-Month Industrial Warranty
• Lead Time: Ships within 1–2 business days from active legacy stock
• Pricing Note: Listed price is indicative and varies based on global availability of Speedtronic components. Contact our supply desk for a firm, up-to-date quote.

Technical Specifications

Field Experience & Engineering Insights

Signal Routing & Conditioning Architecture

In field deployments of Mark V control cores, the TCCB acts as a secondary processing bridge for analog telemetry. It scales raw field voltage and current signals into discrete values utilized by the primary control processor. Because the Mark V utilizes a triple-modular redundant (TMR) framework across the \langleR\rangle, \langleS\rangle, and \langleT\rangle cores, you must ensure that cross-core instrumentation cabling to the TCCB is completely uncompromised. Any high contact resistance on the associated ribbon cables will cause voter mismatches and trigger diagnostic alarms in the operators’ HMI.

Hardware Configuration & Jumpers

• Manual Jumper Matching: The DS200TCCBG3B contains arrays of physical hardware Berg jumpers (labeled JP parameters) used to define circuit gain, input signal types (e.g., 4 to 20 mA current loops vs. direct voltage inputs), and grounding options.
• Replacement Constraints: When executing an emergency board swap out at 2 AM, do not assume the replacement card’s factory-default jumper layout matches your system criteria. Document and mirror the physical positions of every single jumper from the faulty board onto the new DS200TCCBG3B prior to insertion. Failure to do so will cause immediate sensor miscalibration or hardware damage upon power restoration.

EPROM and Memory Preservation

• Configurable Firmware: The board layout utilizes socketed EPROM chips containing the firmware layer required to execute analog sampling routines. Replacement boards typically ship without these specialized IC chips or with generic baseline configurations.
• Migration Rule: Carefully extract the original EPROM chips from the defective card using an approved IC extraction tool, then insert them into the exact same socket alignment on the replacement board. Keep track of pin 1 orientation index indicators during this transfer process to avoid burning out the memory module.

System Integration & Compatibility Checklist

• Core Configuration: Integrates with Mark V \langleC\rangle or extended I/O cores. Interfaces directly with the TBCB terminal block assembly and the TCEB processor card via high-density ribbon lines.
• Revision Continuity: The G3B designation is specific. While backward compatibility exists with select older software versions, you must verify against the GE Speedtronic hardware manual (GEI-100163 / GEH-6121) to confirm software compatibility with older G1 or G2 board variants.
• Handling Protection: The onboard operational amplifiers and processing logic are highly sensitive to Electrostatic Discharge (ESD). Ensure full static-grounding protocols are maintained during installation.

Frequently Asked Questions

What differentiates the “G3” variant from a “G1” variant of the DS200TCCB board?

The group suffix (G1 vs. G3) denotes changes in the layout or component selection, such as different analog multiplexers, specific resistor network ratings, or variations in the number of active input channels populated on the board surface. Installing a G3 card in place of a G1 requires verifying that your current control software configuration definitions account for the altered hardware layout.

What should I check if the HMI reports an “Analog Input Open Circuit” fault immediately after replacing the card?

First, verify that the ribbon cable connectors are fully seated and that the locking tabs have snapped shut. Second, cross-check the configuration jumpers related to that specific channel against the old board; an incorrect jumper setting can open the circuit loop or remove the required termination resistance.

Can I hot-swap the DS200TCCBG3B while the turbine is running?

Absolutely not. The Mark V backplane and internal power supply lines do not support hot-swapping for common analog boards. Pulling this card while the control core is energized can corrupt the communication bus, trip the primary turbine protection loops, and cause catastrophic damage to the power distribution modules. Always isolate the core power supply circuit breaker before pulling the board.