Description
Product Parameters
| Parameter | Specification |
|---|---|
| Brand / Series | GE Mark VIe Speedtronic |
| Model | IS200TBAIH2C |
| Analog Inputs | 32 channels (4–20 mA, 0–10 V, ±10 V selectable) |
| Internal Loop Power | 24 VDC (available on 16 channels, software-enabled) — upgraded from external-only |
| ADC Resolution | 16-bit SAR with programmable sampling rate (10–500 SPS) |
| Accuracy | ±0.1% of full scale (25°C), ±0.2% over full temperature range |
| Input Impedance | 250 Ω (current mode), > 1 MΩ (voltage mode) |
| Filtering | Programmable low-pass filter (1–50 Hz) |
| Isolation | 1500 VAC (field-to-system) |
| CMRR | >100 dB @ 50/60 Hz |
| Diagnostics | Open-circuit detection, over-range/under-range detection, loop power fault monitoring |
| Status Indication | 32 green LEDs (channel active), 2 red LEDs (diagnostic fault summary) |
| Operating Temperature | –30°C to +65°C |
| Storage Temperature | –55°C to +85°C |
| Mounting | VME rack-mount terminal board with front-panel I/O connector |
| Backplane Interface | VME64x (A24/A32, D16/D32/D64) |
Advantages & Key Features
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Maximum Channel Density: 32 analog inputs in a single VME slot—double the density of IS200TBAIH1B (24 channels) and four times that of competing 8-channel modules.
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Integrated Loop Power: 24 VDC loop power available on 16 channels (software-enabled), reducing the need for external power supplies for 2-wire transmitters.
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Flexible Input Configuration: Each channel supports 4–20 mA, 0–10 V, or ±10 V inputs via GE ToolboxST software.
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Programmable Filtering: Onboard low-pass filter (1–50 Hz) optimizes noise rejection vs. response speed.
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Comprehensive Diagnostics: Real-time open-circuit, over-range/under-range, and loop power fault monitoring per channel.
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High-Density Status Indication: 32 green LEDs (one per channel) and 2 red summary fault LEDs enable rapid on-site channel status identification.
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ToolboxST Integration: Full configuration, calibration, and diagnostics via GE ToolboxST.
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Drop-In Replacement: Direct replacement for earlier GE analog input terminal boards.
Application Fields
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Gas & Steam Turbines (GE Frame 6B/7EA/9E/HA): Fuel gas pressure/flow, steam pressure/temperature, bearing vibration (via transmitters), lube oil pressure/temperature, cooling water pressure, valve position feedback, generator hydrogen pressure.
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Combined Cycle Plants: HRSG feedwater flow, steam drum pressure, superheater temperature, condensate flow, extraction pressure.
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Compressor Stations: Suction/discharge pressure, gas flow, vibration transducers, intercooler temperature.
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Aeroderivative Turbines: Fuel flow, engine oil pressure, inlet guide vane position, exhaust temperature transmitters.
Comparison with Competing Products
| Feature | GE IS200TBAIH2C | GE IS200TBAIH1C | Competitor A (Emerson) | Competitor B (Siemens) |
|---|---|---|---|---|
| Analog Inputs | 32 | 32 | 8 | 8 |
| Internal Loop Power | Yes (16 channels) | No | No | No |
| Input Types | 4–20mA, 0–10V, ±10V | 4–20mA, 0–10V, ±10V | 4–20mA only | 4–20mA, 0–10V |
| Accuracy | ±0.1% FS | ±0.1% FS | ±0.2% FS | ±0.15% FS |
| Isolation | 1500 VAC | 1500 VAC | 1000 VAC | 500 VDC |
| Operating Temp | –30°C to +65°C | –30°C to +65°C | 0°C to 50°C | 0°C to 60°C |
Key Advantage: IS200TBAIH2C provides 32 analog inputs with integrated loop power on 16 channels—reducing external power supply requirements and simplifying wiring compared to IS200TBAIH1C and competing modules.
Selection Guidelines & Recommendations
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Channel Count: 32 channels per board—sufficient for most large turbines.
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Loop Power Selection: Enable internal 24 VDC loop power for 2-wire transmitters on the 16 supported channels. Use external supplies for the remaining 16 channels or for devices requiring >30 mA.
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Input Type: Configure 4–20 mA, 0–10 V, or ±10 V per channel in GE ToolboxST.
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Filtering: Use 1–10 Hz for temperature/pressure, 20–50 Hz for dynamic signals.
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Controller Firmware: Requires Mark VIe processor firmware v7.0 or later.
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Spare Strategy: Keep one spare per turbine; lead times 6–10 weeks.
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Retrofit: Direct replacement—regenerate configuration in GE ToolboxST.
Important Cautions
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No Hot-Swap: De-energize rack before insertion/removal.
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Loop Power Polarity: For channels using internal loop power, observe correct polarity—reverse polarity prevents transmitter operation.
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Loop Power Current Limit: Internal loop power limited to 30 mA per channel—use external supply for higher-current transmitters.
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Input Overload: Sustained input >30 V or >50 mA may damage input circuitry.
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Grounding: Connect AGND to Mark VIe system ground at single star point.
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Shield Termination: Ground shields only at cabinet end.
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ESD Handling: Use grounded wrist straps; field repair not possible.
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Filtering Trade-Off: Lower cutoff = better noise rejection but more signal delay.
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Channel Mapping: With 32 channels, verify wiring maps to correct ToolboxST channel assignments.
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