1. Product Overview

Core Functions

• Supports Type E, J, K, S, T thermocouple inputs, compatible with grounded/ungrounded thermocouples

• Provides signal isolation, cold junction compensation, open-circuit/over-range diagnostics and out-of-limit signal masking

• Integrates FPGA, DSP and dual-port SRAM for high-speed signal processing and data transmission

• Compatible with Mark VI TMR (Triple Modular Redundant) architecture, communicates via IONet, supports hot-swap and online maintenance.

2. Key Technical Specifications

1. Input Specifications

• Number of Channels: 16 Thermocouple Input Channels

• Supported Thermocouple Types: E, J, K, S, T (grounded or ungrounded)

• Maximum Cable Distance: 300 meters (control cabinet to sensor)

• Maximum Bidirectional Cable Resistance: 450Ω

• Signal Processing: Built-in cold junction compensation, 16-bit high-precision A/D conversion, channel isolation

• Fault Diagnostics: Open-circuit detection, over-range/out-of-limit detection; out-of-limit channels are automatically excluded from scanning to prevent data interference.

2. Hardware & Communication

• Core Chips: Xilinx Spartan XCS30 FPGA, TMS320C32 DSP, IDT dual-port SRAM

• Interfaces: Backplane connectors P1/P2, 4 field wiring terminals, 3 status LED indicators

• Communication: Connects to Mark VI control system via IONet, supports redundant communication

• Power Supply: 24VDC, power consumption ≤5.75W

• Mounting: Plugs into Mark VI I/O rack, standard industrial PCB design

3. Environmental & Reliability

• Operating Temperature: -40°C to +70°C; Storage Temperature: -55°C to +85°C

• Protection Rating: IP20 (for installation in control cabinets)

• Certifications: CE, UL, IEC 61010-1 and other industrial safety standards

• Redundancy: Native TMR triple redundancy support, three parallel acquisition channels with voting, eliminates single-point failure risk

• Hot-Swappable: Supported, online replacement without system shutdown

• Diagnostics: Power-on self-test, real-time monitoring of channel status, power supply and communication, LED status indication

3. Key Features & Benefits

1. Multi-Type Thermocouple Compatibility: Single board supports all mainstream thermocouple types (E/J/K/S/T), covering high/medium/low temperature monitoring scenarios and reducing spare parts inventory.

2. High Precision & Strong Anti-Interference: Built-in cold junction compensation, channel electrical isolation and signal filtering ensure stable long-distance (300m) signal acquisition in harsh industrial EMI environments.

3. Intelligent Fault Diagnostics: Automatic detection of open-circuit, over-range and out-of-limit conditions; abnormal channels are automatically masked to ensure valid temperature data and avoid false/non-action protection.

4. Redundancy & Hot-Swap Design: Native compatibility with Mark VI TMR architecture, supports online maintenance to meet continuous operation and zero-downtime overhaul requirements for turbines.

5. Industrial-Grade High Reliability: Wide temperature range, conformal coating, high vibration resistance, suitable for power plants, oil & gas, chemical and other harsh industrial environments.

4. Typical Applications

• Gas Turbines: Temperature monitoring of combustors, turbine blades, casings, bearings and exhaust

• Steam Turbines: Temperature monitoring of cylinders, main steam valves, rotors and bearings

• Combined Cycle Power Plants, Industrial Boilers, Compressor Units: Critical equipment temperature acquisition and safety protection