GE IS220PTCCH2B | PTCCH2 Thermocouple Input I/O Pack for Mark VIe – Full Specs

Description

Hard-Numbers: Technical Specifications

• Network: Dual 10/100Mbps IONet Ethernet (RJ45)
• Input Channels: 12× fully isolated thermocouple/mV inputs
• Supported Types: E, J, K, S, T, B, N, R (grounded/ungrounded)
• Input Span: -8 mV to +45 mV
• Resolution: 16-bit A/D converter
• Isolation: Enhanced 2500V DC field-to-backplane & channel-to-channel
• Common Mode: ±5 V, 100dB rejection @50/60Hz
• Accuracy: ±0.25°F (±0.14°C) full scale
• Sampling Rate: Up to 120Hz per channel
• Power: 24 VDC (22.5–28.6V), 7.5W max
• Temp Range: -30°C to +65°C
• Dimensions: 83 × 42 × 122 mm
• Weight: ~0.5 kg (1.1 lbs)
• Certifications: Class I Div 2, Zone 2 hazardous locations
• LEDs: PWR, ATTN, ACT1, ACT2, TEMP (diagnostic)
• Manual: GEH-6721L

IS220PDIOH1B

The Real-World Problem It Solves

is the second-generation, universal thermocouple module for Mark VIe systems. As the direct successor to IS220PTCCH1B, it features enhanced signal isolation and full support for high-temperature B, N, and R-type thermocouples, making it the standard for modern gas turbine combustion monitoring, industrial boiler controls, and high-temperature process loops. It eliminates ground loops and noise, ensuring stable readings in extreme industrial environments.Typical Applications:

• Advanced gas turbine combustion & flame monitoring
• Ultra-high-temperature turbine exhaust thermometry
• Industrial furnace & boiler temperature control
• HRSG, chemical, and refining high-temp loops
• TMR (Triple Modular Redundant) temperature systems

Hardware Architecture & Under-the-Hood Logic

features a redesigned, next-gen circuit board for improved noise immunity:

1. Dual Isolation Barriers: Independent isolation for each channel and backplane.
2. Advanced CJC: Precision cold-junction compensation for extreme thermal stability.
3. High-Speed ADC: 16-bit conversion at 120Hz with multi-stage filtering.
4. Universal Linearization: On-board firmware linearizes all 8 thermocouple types.
5. Redundant IONet: Dual Ethernet ports for TMR and non-stop operation.
6. Self-Diagnostics: Detects opens, shorts, out-of-range, and internal faults.
7. Conformal Coating: Full PCB coating for corrosion & vibration resistance.

Field Service Pitfalls (Same for PTCCH1B/2B)

Thermocouple Type Mismatch

• Issue: Software configured for wrong type (e.g., B on CH1B) causes massive error.
• Fix: Confirm type in ToolboxST; PTCCH2 supports B/N/R (PTCCH1 does not).

Ground Loop Creation

• Issue: Thermocouple grounded at both ends induces noise/unstable readings.
• Fix: Use ungrounded couples; single-point ground at TBTCH terminal.

Excessive Cable Resistance

• Issue: Wire >450Ω resistance causes signal loss.
• Fix: Use 24AWG twisted-pair; limit length <984ft (300m).

Over-Torqued Terminals

• Issue: Tightening >0.5 N·m cracks TBTCH blocks.
• Fix: Torque to 0.5 N·m (4.4 lb·in); replace damaged blocks.

IS220PDIOH1B

vs. IS220PTCCH1B (Key Differences)

Commercial Availability & Pricing Note

Please note: The listed price is for reference only and is not binding. Final pricing and terms are subject to negotiation based on current market conditions and availability.