Description
Product Introduction
The GE IS200DTTCH1ABB is a premium temperature input module in the Mark VIe DTTC family, providing 16 channels of high-accuracy temperature measurement with enhanced diagnostics and expanded sensor type support for critical turbine control applications. This I/O pack interfaces with both thermocouple and RTD sensors, delivering the highest level of precision and diagnostic visibility available in this module series.
The ABB suffix denotes the premium configuration in the DTTC lineage, featuring 16-bit resolution, ±0.05% accuracy, expanded sensor type support, enhanced diagnostics including per-channel health monitoring, and improved CJC accuracy of ±0.25°C. In our field experience, the ABB variant is the preferred choice for critical temperature monitoring applications requiring both thermocouple and RTD flexibility. For engineers requiring maximum measurement accuracy with comprehensive diagnostic visibility for mixed sensor installations, the ABB provides the confidence needed for reliable turbine operation.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Model Number | IS200DTTCH1ABB |
| Series | Mark VIe IS200 |
| Hardware Revision | ABB (premium with diagnostics) |
| Number of Channels | 16 temperature input channels |
| Sensor Types | Thermocouple (J, K, T, E, R, S, B, N), RTD (Pt100, Pt200, Ni120, Cu10) |
| Resolution | 16-bit ADC (0.0015% of span) |
| Accuracy | ±0.05% of span at 25°C |
| CJC Accuracy | ±0.25°C for thermocouple inputs |
| RTD Excitation Current | 0.5 mA typical |
| Diagnostics | Open-circuit detection, short-circuit detection, out-of-range detection, per-channel health monitoring, drift detection, noise monitoring, CJC fault detection |
| Noise Filtering | Software configurable filters per channel (50 Hz, 60 Hz, 10 Hz) |
| Isolation | 500 V DC channel-to-backplane |
| Operating Temperature | −30°C to +65°C (ambient, with 0.5 m/s airflow) |
| Power Supply | 5 V DC from backplane, 195 mA typical |
| Bus Interface | VME-based high-speed parallel bus |
| Firmware | Requires ToolboxST/ToolboxEX version 6.2 or higher |
| Termination Board Compatibility | TS200DTT1, TS200DTT2 |
| LED Indicators | Module power, configuration status, fault, diagnostic alert |
Key Selling Points & Differentiators
- 16-channel mixed TC/RTD input – supports both thermocouple and RTD sensors on the same module with expanded sensor type support. Reduces spare part inventory for mixed sensor installations.
- Expanded sensor type support – includes thermocouple types B and N, and RTD types Pt200 and Cu10, in addition to standard J, K, T, E, R, S, Pt100, and Ni120.
- Enhanced accuracy of ±0.05% – better than the standard H1A (±0.1%). Essential for critical temperature monitoring requiring maximum precision.
- Improved CJC accuracy of ±0.25°C – better than the H1A’s ±0.5°C. Provides more accurate temperature readings for thermocouple inputs.
- Enhanced diagnostics with health monitoring – per-channel health monitoring detects drift, noise, and measurement anomalies. Predicts failures before they affect turbine control.
- Rigorous 72-hour burn-in – each unit runs with all 16 channels configured for mixed sensor types across temperature cycling. We verify accuracy against NIST-traceable references.
- 4-year warranty on hardware – extended warranty reflecting the ABB’s premium reliability. Backed by our in-house repair depot with 48-hour average turnaround and dedicated DTTC swap-pool.
Frequently Asked Questions (FAQ)
Can I hot-swap this IS200DTTCH1ABB into a running Mark VIe system?
We strongly advise against it. The DTTCH1ABB has shown unpredictable behavior when inserted into a powered backplane due to the configuration initialization process and high-accuracy calibration circuits. Schedule a controlled outage, de-energize the rack, and swap it during planned maintenance.
What is the difference between the IS200DTTCH1A and the IS200DTTCH1ABB?
The ABB has better accuracy (±0.05% vs. ±0.1%), expanded sensor type support (B, N thermocouples and Pt200, Cu10 RTDs), improved CJC accuracy (±0.25°C vs. ±0.5°C), enhanced diagnostics, and configurable noise filters.
What sensor types does this module support?
The ABB supports thermocouple types J, K, T, E, R, S, B, and N, and RTD types Pt100, Pt200, Ni120, and Cu10. Each channel is individually configurable through ToolboxST.
Can I mix thermocouple and RTD sensors on the same module?
Yes. Each of the 16 channels can be independently configured for thermocouple or RTD input. This is the key advantage of the DTTC series.
How does the per-channel health monitoring work?
The ABB monitors each channel for measurement anomalies, noise, and drift. If a channel deviates from expected behavior, a diagnostic flag is set. This allows you to detect developing sensor or wiring issues before they affect turbine control. We include a quick-reference guide for interpreting health monitoring data.
How do the configurable noise filters work?
Each channel can be configured with a 50 Hz, 60 Hz, or 10 Hz filter. The filter attenuates power line noise and other periodic interference. The 10 Hz filter provides the best noise rejection but increases settling time. Use 50 Hz or 60 Hz for most applications, depending on your local power line frequency.
What is the maximum cable length for temperature inputs with the ABB?
For thermocouple inputs, we recommend using shielded, twisted-pair extension wire with a maximum length of 150 meters. For RTD inputs, use 3-wire or 4-wire configuration with a maximum length of 150 meters for 3-wire and 250 meters for 4-wire. The ABB’s enhanced noise rejection allows longer runs than the H1A.
Is there cold junction compensation for thermocouple inputs?
Yes. The module includes cold junction compensation (CJC) with ±0.25°C accuracy. The CJC temperature is measured by an onboard sensor and applied to each thermocouple channel.
How do I configure the channels?
Channel configuration is done in ToolboxST version 6.2 or higher. Each channel can be set to a specific sensor type, range, and filter setting. The configuration is stored in the module’s EEPROM. After replacement, you must reconfigure the new module.
How do I verify this is a genuine GE module?
We source exclusively from GE-authorized liquidations. Our verification includes OEM packaging inspection, serial number cross-check against GE records, and PCB inspection for GE-specific markings. We test all 16 channels with NIST-traceable calibrated thermocouple and RTD simulators. We provide PCB photographs upon request.
Will I lose my configuration data when I replace the module?
Yes. Configuration is stored in the module’s EEPROM, not in the controller. You will need to reconfigure the new module in ToolboxST after installation. Take screenshots or save your configuration file before replacement.
What is the expected lifespan of this unit?
We see MTBF around 145,000 hours for the ABB revision. The high-accuracy components are premium grade and have excellent long-term stability. We have seen these units exceed 18 years in field service.
What happens if the module fails within the warranty period?
We cross-ship a tested replacement from our dedicated DTTC ABB swap-pool the same business day. You return the failed unit within 15 days. Our repair depot has an average 48-hour turnaround. You receive an ABB replacement – not a downgraded H1A.
Which termination board should I use with this module?
The IS200DTTCH1ABB mates with GE’s TS200DTT1 or TS200DTT2 termination boards. Check ribbon cable orientation; pin 1 has a red stripe. We include a wiring diagram PDF with every order.

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