IS220PTCCH1B GE

Model: IS220PTCCH1B
Manufacturer: GE (General Electric)
Core Function: Acquires and conditions signals from up to 12 thermocouple inputs optimized for combustion monitoring, with integrated cold junction compensation and high-accuracy digitization for turbine temperature control.
System Compatibility: Compatible with Mark VIe and Mark VIeS control systems in simplex, duplex, or TMR configurations.
Supply Status: In Stock for immediate global shipment.
Warranty Standard: 12-month functional warranty, fully tested.

Key Technical Specifications

Product Model: IS220PTCCH1B
Manufacturer: GE
System Platform: Mark VIe Turbine Control System
Power Supply Voltage: 28 V DC nominal, operating range typically 24-32 V DC for reliable field performance.
Power Consumption: Approximately 0.16 A at 28 V DC (around 4.5 W), minimizing heat generation in dense I/O racks.
Communication Interfaces: Dual 100 Mbps Ethernet ports for IONet connectivity, supporting deterministic data exchange in redundant architectures.
Input Channels: 12 thermocouple inputs optimized for combustion zone monitoring, plus 1 dedicated cold junction compensation sensor.
Supported Thermocouple Types: Types E, J, K, S, T (with software configuration for linearization and scaling).
Measurement Accuracy: ±0.25% of reading or better (typical for industrial-grade compensation), critical for precise exhaust temperature and combustion stability.
Cold Junction Compensation: Integrated sensor with accuracy better than ±1°C, ensuring reliable reference for all channels.
Operating Temperature Range: -30°C to +65°C, suitable for turbine hall and outdoor enclosure installations.
Humidity Tolerance: 5% to 95% non-condensing, with conformal coating on PCB for environmental protection.
Dimensions: Approximately 8.26 cm (height) × 4.19 cm (width) × 12.1 cm (depth), fitting standard Mark VIe I/O pack mounting.
Weight: Approximately 0.4-0.5 kg, facilitating straightforward replacement in field conditions.
Certification Standards: CE compliant, UL listed, meets IEC 61131-2 for programmable controllers and EMC immunity in industrial settings.
MTBF (Mean Time Between Failures): Exceeds 300,000 hours per GE reliability modeling, supporting long service life in continuous operation.
Isolation Voltage: 1500 V AC channel-to-channel and channel-to-ground, protecting against noise and transients common in power plant environments.

Technical Architecture & Functional Positioning

Positioned at the field I/O layer in the Mark VIe control hierarchy, the IS220PTCCH1B serves as a dedicated thermocouple acquisition pack that digitizes raw millivolt-level signals from combustion thermocouples and transmits conditioned engineering units over the IONet Ethernet backbone to the controller. This design integrates high-precision analog front-end circuitry with onboard cold junction compensation and thermocouple linearization tables, performing local A/D conversion at high resolution to minimize noise pickup over long cable runs typical in turbine enclosures. By processing signals close to the sensors, it reduces latency in temperature feedback loops essential for combustion tuning, emissions control, and overtemperature protection.

The module’s architecture features surface-mount technology, embedded diagnostics for open/short detection on each channel, and fault-tolerant communication via dual Ethernet links. These elements address critical challenges in gas turbine operation, such as maintaining flame stability across multiple combustors where temperature variations of a few degrees can impact efficiency or trigger alarms. The combustion-optimized input configuration prioritizes fast response and low drift for exhaust spread monitoring, enabling advanced control strategies like DLN (Dry Low NOx) tuning. In TMR setups, multiple packs provide voting logic for enhanced safety integrity.

Firmware configurable through ToolboxST allows selection of thermocouple type, filtering, and alarm thresholds, supporting seamless adaptation to different turbine frames or fuel types without hardware changes.