Description
Product Overview
GE IS200TCASH1A (TCAS) is a field signal terminal board for GE Speedtronic Mark VIe gas/steam turbine control system. It provides signal termination, routing and LVDT excitation outputs between field sensors and BCAA analog acquisition boards. It handles LVDT valve position feedback, 4-20mA transmitters and vibration monitoring signals for turbine control and protection. Widely deployed in power generation gas turbines, steam turbines and combined cycle plants. It is a critical legacy aftermarket spare for maintenance and retrofit of Mark VIe TMR turbine control racks.
Technical Specifications
| Parameter | Details |
|---|---|
| Part Number | IS200TCASH1A |
| Brand | GE (General Electric) |
| Type | Analog Signal Terminal Board (TCAS) |
| Compatible Platform | GE Speedtronic Mark VIe Turbine Control System |
| Power Input | 28V DC control power via P5 connector |
| LVDT Excitation | 6 pairs, 3.2kHz, 7.07V RMS sine wave excitation |
| Connectors | P1/P2: Dual 68-pin headers; P4: JGPA shielding board power tap; P5: 28V power input; Field screw terminal blocks |
| Signal Types | LVDT position signals, 4–20mA analog transmitter signals, seismic/vibration sensor inputs |
| Galvanic Isolation | 1500V DC isolation between field wiring and Corebus backplane |
| Power Consumption | Max 2.7W continuous |
| Operating Temperature | -30°C ~ +65°C |
| Storage Temperature | -40°C ~ +85°C |
| Humidity | 5~95% RH, non-condensing |
| Conformal Coating | Acrylic conformal coating for harsh cabinet environments |
| Mounting | Installed inside Mark VIe I/O pack rack |
| Net Weight | ~0.48 kg |
| Certifications | CE |
| Product Status | OEM discontinued, aftermarket spare only |
Key Features
- Dedicated terminal board for Mark VIe turbine control, routes field sensor signals to BCAA analog acquisition modules
- 6 independent LVDT excitation output pairs for turbine valve position measurement
- Screw terminal blocks for easy field wiring termination of analog transmitters and position sensors
- Built-in shielding termination for low-level sensor signals to reduce EMI interference
- Supports TMR triple redundant architecture for high-reliability turbine protection
- Onboard diagnostics for power supply faults and open signal wiring detection
- Conformal coating protects PCB from dust, humidity and corrosive cabinet atmosphere
Installation & Testing Notes
- Install IS200TCASH1A into the designated I/O pack slot of Mark VIe turbine control rack
- Connect P1/P2 68-pin cables to BCAA acquisition boards; terminate field LVDT and analog sensor wiring
- Verify 28V DC power supply and proper equipment grounding before energizing
- After power-up, check module power status and run system self-test via turbine control HMI
- Test LVDT excitation output and 4-20mA channel signal routing for all field sensors
- This board does NOT support hot swap. Isolate rack 28V control power before removal
- Validate valve position feedback and analog signal readings after replacement
- Periodically inspect terminal screw tightness and cable shielding in high vibration turbine cabinets
FAQ
Q: What system is IS200TCASH1A used for? A: GE Speedtronic Mark VIe gas/steam turbine control system.
Q: What is the main function of IS200TCASH1A? A: It is an analog terminal board that provides LVDT excitation and signal routing for turbine valve position and analog field sensors, interfacing to BCAA acquisition boards.
Q: Is IS200TCASH1A hot swappable? A: No, the rack 28V DC control power must be isolated before installing or removing this board.
Q: What sensors connect to IS200TCASH1A? A: LVDT valve position sensors, 4-20mA transmitters and seismic vibration probes.
Q: What does TCAS stand for? A: TCAS = Terminal Card Analog Signal for Mark VIe I/O pack.
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