Description
Product Parameters
| Parameter | Specification |
|---|---|
| Brand / Series | GE Mark VIe Speedtronic |
| Model | IS200TPROH1C |
| Speed Inputs | Up to 6 independent channels (configurable) |
| Input Signal Types | Magnetic pickups, proximity probes (passive/active), TTL, 5–24 VDC logic |
| Frequency Range | 0.5 Hz – 25 kHz |
| Input Voltage Range | ±30 VDC maximum |
| Input Impedance | > 10 kΩ |
| Trigger Level | Programmable per channel (0.5–24 VDC, hysteresis configurable) |
| Scaling | Programmable (RPM, Hz, etc.) via GE ToolboxST |
| Accuracy | ±0.01% of reading |
| Isolation | 2000 VAC (field-to-system) |
| Diagnostics | Open-circuit detection, signal loss detection, frequency out-of-range monitoring, signal integrity monitoring (amplitude/quality) |
| Status Indication | 6 green LEDs (channel active), 6 red LEDs (channel fault), 2 red summary fault LEDs |
| Operating Temperature | –40°C to +70°C |
| Storage Temperature | –55°C to +85°C |
| Mounting | VME rack-mount terminal board with front-panel I/O connectors |
| Backplane Interface | VME64x (A24/A32, D16/D32/D64) |
| EMC Compliance | IEC 61000-4 Level 4 |
Advantages & Key Features
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Maximum Channel Density: Up to 6 independent speed inputs in a single VME slot—the highest channel count in the Mark VIe speed probe terminal family, providing 50% more channels than IS200TPROH1B (4 channels) and six times that of competing 1-channel modules. Ideal for multi-shaft turbines and applications requiring multiple speed monitoring points.
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Extended Temperature Range: –40°C to +70°C operation makes IS200TPROH1C suitable for arctic, desert, and unheated turbine enclosures.
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Enhanced Isolation: 2000 VAC isolation provides superior protection for the Mark VIe backplane.
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Signal Integrity Monitoring: Per-channel amplitude/quality monitoring detects weak or degraded sensor signals before failure.
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Versatile Signal Compatibility: Supports magnetic pickups, proximity probes, TTL, and logic-level signals.
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Programmable Trigger Levels: Per-channel programmable trigger voltage and hysteresis ensure reliable signal detection.
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Wide Frequency Range: 0.5 Hz to 25 kHz covers turbine startup to overspeed conditions.
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High Accuracy: ±0.01% reading accuracy provides precise speed and frequency measurements.
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Comprehensive Diagnostics: Open-circuit, signal loss, frequency out-of-range, and signal integrity monitoring per channel.
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ToolboxST Integration: Full configuration, monitoring, and diagnostics via GE ToolboxST.
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Drop-In Replacement: Direct replacement for IS200TPROH1B, IS200TPROH1A, and earlier speed probe terminal boards.
Application Fields
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Gas & Steam Turbines (GE Frame 6B/7EA/9E/HA): Shaft speed monitoring, overspeed detection, speed control, and multi-shaft monitoring.
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Aeroderivative Turbines: Speed monitoring and overspeed protection.
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Compressor Stations: Compressor speed monitoring for multiple stages.
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Generator Speed Monitoring: Turbine-generator speed measurement.
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Multi-Shaft Applications: Speed monitoring of multiple turbine sections in combined-cycle and complex turbine configurations.
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Arctic & Desert Installations: Extreme-environment turbine speed monitoring.
Comparison with Competing Products
| Feature | GE IS200TPROH1C | GE IS200TPROH1B (4-ch) | GE IS200TPROH1A (4-ch) | Competitor A (Speed Probe) | Competitor B (Speed Monitor) |
|---|---|---|---|---|---|
| Speed Inputs | Up to 6 | Up to 4 | Up to 4 | 2 | 1 |
| Frequency Range | 0.5 Hz – 25 kHz | 0.5 Hz – 25 kHz | 0.5 Hz – 20 kHz | 1 Hz – 10 kHz | 1 Hz – 15 kHz |
| Accuracy | ±0.01% | ±0.01% | ±0.01% | ±0.1% | ±0.05% |
| Signal Integrity Monitoring | Yes | Yes | No | No | No |
| Isolation | 2000 VAC | 2000 VAC | 1500 VAC | 1000 VAC | 500 VDC |
| Operating Temp | –40°C to +70°C | –40°C to +70°C | –30°C to +65°C | 0°C to 50°C | 0°C to 60°C |
Key Advantage: IS200TPROH1C provides up to 6 independent speed inputs—the highest channel density in the Mark VIe speed probe terminal family—with extended frequency range (25 kHz), extended –40°C to +70°C temperature range, 2000 VAC isolation, and signal integrity monitoring, making it the premier solution for multi-shaft and complex turbine speed monitoring in extreme environments.
Selection Guidelines & Recommendations
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Input Count: Determine the number of speed inputs required—up to 6 per board.
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Sensor Type: Verify speed sensor type and configure trigger levels in GE ToolboxST.
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Signal Integrity Monitoring: Enable for critical speed sensors to receive early warnings of signal degradation.
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Scaling Configuration: Program scaling factors for RPM or other engineering units.
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Controller Firmware: Requires Mark VIe processor firmware v8.5 or later.
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Wiring Guidelines: Use shielded twisted-pair cables. Maintain shield grounding only at the Mark VIe cabinet end.
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Spare Strategy: Keep one spare per turbine; lead times 8–12 weeks.
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Retrofit: Direct replacement for IS200TPROH1B and IS200TPROH1A—regenerate configuration in GE ToolboxST for 6-channel mapping.
Important Cautions
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No Hot-Swap: De-energize rack before insertion/removal.
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Signal Polarity: For magnetic pickups, observe correct polarity for reliable zero-crossing detection.
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Trigger Level: Incorrect trigger level can cause missed pulses or false triggering—verify with sensor specifications.
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Cable Length: For magnetic pickups, use low-capacitance cables for runs exceeding 50 meters.
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Grounding: Connect AGND to Mark VIe system ground at single star point.
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Shield Termination: Ground speed probe cable shields only at cabinet end.
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ESD Handling: Use grounded wrist straps; field repair not possible.
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Temperature Rating: Verify cabinet ambient does not exceed +70°C or fall below –40°C.
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Signal Integrity Alerts: Investigate weak signal alerts promptly to prevent sensor failure.
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Frequency Out-of-Range: Monitor diagnostic alerts—investigate sensor or wiring faults.
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Channel Mapping: With up to 6 channels, verify field wiring maps to correct ToolboxST channel numbers.
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