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3. Key Technical Specifications
| Parameter | Value |
| Manufacturer | GE Energy / General Electric |
| Core Architecture | 80196 and 80C186 Microprocessors |
| Communication Ports | LAN, RS-232, and High-Speed Serial Link |
| Slot Compatibility | Mark V , , and Cores |
| I/O Support | Digital Inputs, Pulse Inputs, and Relay Driver Logic |
| Connectors | 2PL through 6PL Ribbon Connectors |
| Revision Level | G3B (Group 3, Rev B Hardware) |
| Power Consumption | +5 VDC and +/-15 VDC from TCPP Board |
4. Product Introduction & Supply Chain Strategy
The GE DS200TCCBG3B is the “brain” of the Mark V Speedtronic system, responsible for coordinating communication between the I/O terminal boards and the control processors. It executes the core software logic required to monitor turbine parameters and issue trip or control commands. This Group 3 (G3) variant is a highly specialized revision designed for complex digital signal processing.
From a supply-chain perspective, maintaining a DS200TCCBG3B as “New Surplus” inventory is an essential risk-mitigation strategy. Since GE has moved past the lifecycle support for the Mark V, finding genuine, zero-hour boards is increasingly difficult. Refurbished TCCB boards often suffer from degraded logic chips and memory corruption that lead to intermittent “Ghost Faults.” Investing in New Surplus stock ensures your TCO remains low by avoiding the catastrophic costs of a processor failure during a peak-demand period.
5. Installation & Configuration Guide
Stage 1: Pre-Installation (Prep & Safety)
Verify the system is completely powered down at the source. Use an ESD-safe workspace and wear a grounded wrist strap. CRITICAL: The TCCB board utilizes removable EEPROM chips (U6, U7, etc.). Identify if your replacement board includes these or if you must migrate the original chips to retain site-specific configuration logic.
Stage 2: Removal
Unplug all ribbon cables from the 2PL, 3PL, 4PL, 5PL, and 6PL connectors. Use a plastic puller or a steady hand to release the connectors—do not pull by the wires. Unscrew the nylon standoffs securing the board to the TCCB chassis and lift the module straight out.
Stage 3: Installation (Clone & Seat)
Carefully align the new DS200TCCBG3B over the standoffs. Ensure any hardware jumpers (J-jumpers) on the new board are set to the exact positions found on the old board. Firmly seat the board and hand-tighten the screws. Reconnect all ribbon cables in the numerically labeled sequence.
Stage 4: Power-On & Testing
Apply power to the control core. Observe the LED display on the front of the rack; it should cycle through the boot sequence and settle on a “0” or “4” depending on your specific system status. Use the LCC (Local Control Center) to verify that the board is communicating with the core without LAN errors.
6. Firmware/Software Versions & Upgrade Notes
The DS200TCCBG3B Group 3 Revision B is specifically tuned for certain I/O densities. If you are replacing a G1 or G2 board with this G3 variant, a software re-compilation in the Mark V “Config” file may be required to recognize the expanded memory map. Warning: Never attempt to “Hot-Swap” the EEPROM chips while the board is powered. This can result in permanent chip corruption and the loss of your turbine’s operational constants.
- DS200TCCBG3B
- DS200TCCBG3B
7. Frequently Asked Questions (FAQ)
What makes the “G3B” version different from “G1A”?
The G3B revision features updated microprocessor timing and improved heat dissipation for the onboard regulators. It is often the preferred replacement for older boards due to its enhanced stability in high-temperature control cabinets.
Are the software chips included with this New Surplus board?
Our New Surplus boards typically ship with factory-default base code. To ensure your turbine operates correctly, you will likely need to move the specialized PROM chips from your existing board to the new one.
How do I know if my TCCB board is failing?
Common symptoms include “Voter Mismatch” alarms, erratic digital input readings, or a complete “Core Down” status where the processors fail to reach a synchronized state.
Why shouldn’t I just buy a refurbished board for half the price?
Refurbished processor boards are often “baked” in control rooms for 20 years. The internal silicon and capacitors have a finite lifespan. A New Surplus board provides 100% of its original design life, which is the only way to guarantee another 10-15 years of turbine reliability.
Is this part compatible with both Gas and Steam turbine Mark V systems?
Yes, the DS200TCCBG3B is a “Common” board used across the Mark V platform, provided the firmware and jumper settings are configured for the specific application.
