Description
Key Specifications
| Parameter | Specification |
|---|---|
| RTD Input Channels | 8 dual-RTD channels (16 total RTD inputs) |
| RTD Types Supported | Pt100 (α = 0.00385), Pt500, Pt1000, Ni120 — software-selectable |
| Connection Configuration | 3-wire or 4-wire (software-selectable per channel) |
| Measurement Range | –200 °C to +850 °C (Pt100) |
| Resolution | 0.05 °C |
| Accuracy | ±0.1% of reading + ±0.3 °C (typical) |
| Sample Rate | 10 Hz (sequential scanning) |
| Excitation Current | Programmable (0.5 mA, 1 mA, 2 mA) per channel |
| Dual-Sensor Redundancy | Each channel supports two independent RTD sensors for redundant temperature measurement |
| Redundancy Logic | On-board average, difference, maximum, and minimum calculation between dual sensors |
| Input Protection | Overvoltage protection (±30 VDC), ESD protection (IEC Level 4) |
| Lead-Wire Compensation | Automatic compensation for 3-wire and 4-wire RTDs |
| Isolation | 1500 VDC (channel-to-backplane) |
| Diagnostics | 500-event fault log with timestamps |
| Communication | I/O Net (dual Ethernet ports for redundancy) |
| Form Factor | 6U VME64x (160 × 233 mm), single-slot width |
| Indicators | Per-channel LED (signal OK/fault), module health, communication status |
| Operating Temp | 0 °C to +60 °C |
| Power Draw | 12 W (+5 V / +3.3 VDC) |
| Connectors | Front-panel 48-pin terminal block with gold-plated contacts and captive washer screws |
Advantages & Distinctive Features
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Dual-Sensor Redundancy: Each channel supports two independent RTD sensors—ensures reliable temperature measurement even if one sensor fails.
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On-Board Redundancy Logic: Calculates average, difference, maximum, and minimum between dual sensors—reduces processor load.
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High Accuracy: ±0.1% reading + ±0.3 °C for critical temperature monitoring.
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Flexible RTD Support: Pt100, Pt500, Pt1000, and Ni120—accommodates various field sensors.
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Lead-Wire Compensation: Automatic compensation for 3-wire and 4-wire RTDs eliminates measurement errors from long cabling.
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Programmable Excitation: User-selectable excitation current minimizes self-heating.
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Gold-Plated Captive Washer Terminals: Corrosion-resistant and vibration-proof.
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Hot-Swappable: No rack power-down for replacement.
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Direct Retrofit: Replaces older DRTD series boards.
Application Fields
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Gas Turbines: Bearing temperature (dual RTDs for redundancy), exhaust temperature
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Steam Turbines: Bearing temperature (dual RTDs), casing temperature
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Generators: Stator winding temperature, bearing temperature
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Compressors: Bearing temperature, discharge temperature
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Critical Temperature Monitoring: Applications requiring redundant temperature sensors for safety
Comparison with VRTDH1C and Competitors
| Feature | GE IS210DRTDH1A | GE IS200VRTDH1C | Competitor A | Competitor B |
|---|---|---|---|---|
| Channels | 8 (dual) / 16 inputs | 16 (single) | 8 (single) | 8 (dual) |
| RTD Types | Pt100/Pt500/Pt1000/Ni120 | Pt100/Pt500/Pt1000/Ni120 | Pt100 only | Pt100/Ni120 |
| Redundancy Logic | Average/Diff/Max/Min | No | No | No |
| Accuracy | ±0.1% + ±0.3 °C | ±0.15% + ±0.5 °C | ±0.2% + ±1 °C | ±0.1% + ±0.5 °C |
| Hot-Swappable | Yes | Yes | No | Yes |
Selection Guidelines
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When to choose: Applications requiring redundant temperature measurement with dual RTD sensors per point.
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Redundancy Logic: Configure average for normal operation; difference for fault detection; max/min for protection logic.
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RTD Configuration: Configure per channel for sensor type, wiring mode, and excitation current in Toolbox ST.
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Compatibility: Fits all Mark VIe VME64x racks. Requires ControlST v6.0 or higher.
Operational Precautions
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Wiring: Follow GE wiring diagrams—correct polarity and shield grounding essential. Use shielded twisted-pair cables.
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Dual-Sensor Wiring: Ensure both sensors are correctly wired per channel.
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Redundancy Logic Testing: Simulate one sensor failure to verify redundancy logic operates correctly.
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Calibration: Factory calibrated—verify against known temperature references during commissioning.
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LED Diagnostics: Green = normal; Amber = sensor fault/difference; Red = module fault.
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Fault Log: Access 500-event log via Toolbox ST.
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Hot-Swap: Remove/insert slowly under power.
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Spare Stock: Maintain 1 spare per 3–4 racks.
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ESD: Handle by edges with grounded wrist strap.
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