Description
Key Specifications
| Parameter | Specification |
|---|---|
| Thermocouple Input Channels | 8 dual-TC channels (16 total thermocouple inputs) |
| Thermocouple Types Supported | J, K, T, E, N, R, S, B — software-selectable |
| Thermocouple Accuracy | ±0.08% of reading + ±0.4 °C (improved over H1A) |
| Cold Junction Compensation | Integrated CJC sensors (±0.2 °C accuracy) |
| Current Input Channels | 4 differential analog inputs (4–20 mA, loop-powered) |
| Current Input Resolution | 16-bit ADC |
| Current Input Accuracy | ±0.03% of full scale (improved over H1A) |
| Current Input Load | 250 Ω (typical) |
| Dual-Sensor Redundancy | Each thermocouple channel supports two independent sensors |
| Redundancy Logic | On-board average, difference, maximum, and minimum calculation |
| Burnout Detection | Open-circuit detection for thermocouple faults |
| Isolation | 1500 VDC (I/O-to-backplane) |
| Diagnostics | 750-event fault log with timestamps (expanded) |
| Sample Rate | 10 Hz (sequential scanning) |
| Operating Temp | –25 °C to +70 °C (extended range) |
| Humidity | 5–95% non-condensing (with conformal coating) |
| Coating | Conformal coating (standard) — UV-traceable |
| Manufacturing | 120-hour burn-in, 100% X-Ray/AOI, military-grade components |
| Form Factor | 6U VME64x (160 × 233 mm), single-slot width |
| Power | 12 W (+5 V / +3.3 VDC) |
| Connectors | 48-pin terminal block with gold-plated contacts and captive washer screws |
Advantages & Distinctive Features
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Dual-Thermocouple Redundancy: Each channel supports two independent TCs.
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On-Board Redundancy Logic: Average, difference, maximum, and minimum calculations.
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Integrated Current Inputs: 4 dedicated 4–20 mA inputs for pressure, flow, or position.
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Improved Accuracy: ±0.08% TC + ±0.4 °C; ±0.03% current.
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Integrated CJC: ±0.2 °C accuracy.
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Burnout Detection: Open-circuit detection for TC faults.
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Loop-Powered Support: 4–20 mA inputs support loop-powered transmitters.
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Conformal Coating Standard: Protects against humidity, salt spray, and chemicals.
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Extended Temperature Range: –25 °C to +70 °C.
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Expanded Diagnostic Log: 750-event fault log.
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Military-Grade Manufacturing: 120-hour burn-in, military-grade components.
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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 DTCI series boards.
Application Fields
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Gas Turbines: Exhaust temperature (dual TC), pressure transmitters (4–20 mA)
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Steam Turbines: Casing temperature (dual TC), pressure transmitters
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Compressors: Inlet/discharge temperature (dual TC), pressure transmitters
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Generators: Stator winding temperature, pressure monitoring
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Offshore platforms: Salt-spray environments requiring conformal coating
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Nuclear Power Plants: Redundant TC monitoring for safety
Comparison with DTCIH1A and Competitors
| Feature | GE IS210DTCIH1AA | GE IS210DTCIH1A | Competitor A | Competitor B |
|---|---|---|---|---|
| TC Channels | 8 (dual) / 16 inputs | 8 (dual) / 16 inputs | 8 (single) | 8 (dual) |
| Current Inputs | 4 (4–20 mA) | 4 (4–20 mA) | None | 4 |
| TC Accuracy | ±0.08% + ±0.4 °C | ±0.1% + ±0.5 °C | ±0.2% + ±1 °C | ±0.1% + ±0.5 °C |
| Current Accuracy | ±0.03% | ±0.05% | N/A | ±0.05% |
| Coating | Standard | Optional | Optional | Optional |
| Temp Range | –25 to +70 °C | 0 to +60 °C | 0 to +55 °C | –10 to +55 °C |
| Fault Logging | 750 events | 500 events | No | No |
Selection Guidelines
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When to choose: Critical redundant TC monitoring with 4–20 mA inputs, requiring environmental protection.
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When to choose “H1A” instead: For clean, controlled environments where conformal coating is not required.
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Redundancy Logic: Configure average for normal operation; difference for fault detection.
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Coating Verification: Inspect under UV (365 nm) upon receipt.
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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.
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Dual-TC Wiring: Ensure both thermocouples are correctly wired per channel.
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Current Input Wiring: Ensure correct polarity for 4–20 mA loop connections.
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Redundancy Logic Testing: Simulate one TC failure to verify redundancy logic.
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Calibration: Factory calibrated—verify against known 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 750-event log via Toolbox ST.
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Coating Care: Use GE-approved cleaner; inspect annually under UV.
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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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Storage: Anti-static bag with desiccant at –40 to +85 °C; rotate every 3 years.
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