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The GE DS200TCEAG1B DS200TCEAG1BTF emergency overspeed board protects turbines from dangerous overspeed conditions. This board monitors multiple speed sensors and triggers immediate shutdown when needed. You will find this overspeed board in GE Mark V turbine control systems. Its dedicated hardware ensures fail-safe operation independently from the main processor.
Speed Detection Architecture
This emergency overspeed board accepts three independent magnetic pickup inputs. Consequently, it provides triple-redundant speed monitoring for maximum safety. The GE DS200TCEAG1B DS200TCEAG1BTF compares each sensor reading against programmable trip thresholds. Moreover, a voting circuit determines when to trigger a shutdown. You can configure trip levels without modifying the board hardware.
Technical Specifications
| Parameter | Value |
|---|---|
| Speed Inputs | 3, magnetic pickup (MPU) type |
| Input Voltage Range | 0.5V to 30V RMS (20 Hz to 20 kHz) |
| Input Impedance | 10 kΩ per channel |
| Trip Outputs | 2, relay (form C, 250V AC/30V DC, 5A) |
| Trip Response Time | 5 ms maximum from overspeed detection |
| Overspeed Accuracy | ±0.5% of reading |
| Hysteresis | 2% of trip level (programmable) |
| Dimensions | 210mm x 160mm x 35mm |
| Weight | 0.68 kg (1.50 lbs) |
| PCB Layers | 6 |
| Onboard Components | 3 signal conditioners, 2 relays, 1 voting logic, 1 watchdog |
| Connector Count | 4 (MPU inputs, relay outputs, power, backplane) |
| Status Indicators | 6 LEDs (input status per channel, trip, power, fault) |
| Energy Storage | 2200 µF (power hold-up capacitance) |
| Isolation Voltage | 1500V (inputs to logic, outputs to logic) |
| Operating Temperature | -10°C to +55°C |
| Storage Temperature | -25°C to +70°C |
Redundant Monitoring and Voting Logic
The unit includes a hardware voting circuit independent of software. Therefore, a single processor failure cannot disable overspeed protection. This board replaces the DS200TCEAG1BTF version without any wiring changes. Simply remove the old board and install this one. GE designed this overspeed board for single-slot installation. Hence, it fits directly into existing Mark V rack positions.
Six PCB layers separate analog speed signals from digital logic traces. Four connectors handle all MPU inputs, relay outputs, and power signals. The GE DS200TCEAG1B DS200TCEAG1BTF holds 2200 µF of capacitance for power hold-up. Accordingly, it continues monitoring during brief power interruptions. A hardware watchdog timer monitors the voting logic for proper operation.
Trip Outputs and Installation Guide
Two independent form C relays provide redundant trip contacts. You can wire these relays in series for fail-safe operation. The GE DS200TCEAG1B DS200TCEAG1BTF requires 24V DC power from the backplane. Always use shielded twisted-pair cable for magnetic pickup connections. Six status LEDs show input activity, trip condition, power, and faults.
The board performs a self-test on power-up to verify all circuits. Any self-test failure will illuminate the fault LED immediately. The GE DS200TCEAG1B DS200TCEAG1BTF works with all GE Mark V turbine systems. Proper shielding of MPU cables prevents false triggering from noise. This board meets SIL 2 safety integrity level requirements.