General Electric IS220PTCCH2A Thermocouple Input Module

GE IS220PTCCH2A Mark VIe Thermocouple Input Pack — 12-Channel, 16-Bit, General Industry

The IS220PTCCH2A is a Thermocouple Input Pack (PTCC) for GE's Mark VIe distributed I/O control platform. It acquires temperature data from 12 thermocouple inputs (expandable to 24 with dual packs) and transmits digitized data to the controller via dual Ethernet networks. The pack features a 16-bit ADC with 120 Hz sampling rate, hardware/firmware filtering, and comprehensive fault detection for high-reliability gas turbine temperature monitoring.

Specifications

• Manufacturer: General Electric / GE Vernova
• Series: Mark VIe
• Type: Thermocouple Input Pack (PTCC)
• Channels: 12 thermocouple inputs
• Scalability: 24 inputs with dual packs; 12 inputs in TMR (3 packs + 3 cold junctions)
• Thermocouple Types: E, J, K, S, T + mV inputs
• Input Span: -8 mV to +45 mV
• ADC Resolution: 16-bit
• Sampling Rate: 120 Hz
• Accuracy: ±0.25°F max software error
• Common Mode Voltage: ±5 V
• CMRR: 100 dB @ 50/60 Hz (hardware + software filtering)
• Normal Mode Rejection: 250 mV RMS @ 50/60 Hz (±5%)
• Max Cable Distance: 984 ft (300 m) from turbine I/O panel
• Max Cable Resistance: 450 Ω
• Operating Temperature: -22°F to +149°F (-30°C to +65°C)
• Communication: Dual RJ45 Ethernet (IONet)
• Power Input: 3-pin connector
• Field Connection: DC-37 pin connector (mates with terminal board)
• Diagnostics: LED indicators + infrared serial port
• Coating: Conformal PCB coating (moisture/salt spray resistant)
• Status: Active / In production

Pack Components

• Processor Board (BPPx): Common to all Mark VIe distributed I/O packs — handles Ethernet communication and system processing
• Acquisition Board: Dedicated to thermocouple input functionality — manages signal acquisition, multiplexing, and A/D conversion

Architecture & Signal Processing

• Multiplexing: 6 differential multiplexers + 1 main multiplexer for efficient signal routing
• Filtering: Hardware + firmware filters on each channel for noise suppression
• Cold Junction Compensation: 1 cold junction per pack (3 in TMR configuration)
• Fault Detection: Hardware/software high/low limit checks; monitors TCs, CJs, calibration voltages, and zero readings
• Self-Tests: RAM, flash memory, Ethernet ports, and processor board hardware checks at power-up
• Power Monitoring: Continuous internal power supply monitoring
• Hardware Compatibility Check: Electronic ID verification from terminal board, acquisition board, and processor board