Description

Foxboro  FBM212  Thermocouple/Voltage Difference Input Module

• Input Channels: Equipped with 14 differentially isolated thermocouple input channels, which can connect multiple thermocouples simultaneously for temperature measurement. It also has 1 differentially isolated RTD reference junction temperature compensation channel for more accurate temperature compensation to ensure measurement accuracy.
• Power Supply: Input voltage is 24V DC, allowing a voltage fluctuation range of +5% and -10%. The maximum power consumption is 3W, and the maximum heat dissipation power at 24V DC is also 3W.
• Accuracy: Millivolt input accuracy is ±0.03% of range (±27µV) (at 25°C); RTD channel accuracy is ±0.03% of range; RTD reference junction conformity is ±0.25°C; thermocouple conformity is ±0.25°C; precise temperature coefficient is ±50 ppm/°C; resistance temperature detector (RTD) reference junction measurement accuracy (B) is ±0.50°C.
• Others: Moderate weight, suitable for installation in industrial control systems. The shell is made of sturdy extruded aluminum, which can adapt to G3 level (harsh) environments. The module can be installed on a Series 200 backplane and supports DIN rail mounting or rack mounting.

• Signal Processing: Each channel is a differential input, which allows a voltage difference between channels without introducing errors, effectively improving the stability and accuracy of measurement. High precision is achieved through sigma-delta data conversion of each channel, providing new analog input readings every 500 milliseconds, which can timely reflect temperature changes.
• Communication Capability: Supports redundant 2 Mbps fieldbus connection, ensuring communication reliability. Even in case of communication failure, it can ensure stable data transmission. At the same time, it also provides configurable options for conversion time and rate of change limitation, which can meet communication needs in different application scenarios.
• Other Functions: Each thermocouple/MV channel can accept standard thermocouples with various temperature ranges, and is equipped with thermocouple burnout detection (upper range) function, which can timely detect faults and facilitate maintenance and overhaul. The module can execute analog input application code, providing stable and reliable data input for industrial automation control systems.

1. Chemical and Petrochemical Industry

• Reactor Temperature Monitoring: In chemical synthesis reactions, it is necessary to real-time monitor the temperature of materials in the reactor through thermocouples (such as polymerization reaction temperature, catalytic reaction temperature). The FBM212 can accurately collect thermocouple signals (such as K-type, J-type, T-type, etc.), ensuring that the reaction temperature is controlled within the process threshold, and avoiding product quality disqualification or safety risks caused by temperature fluctuations.
• Pipeline/Equipment Temperature Difference Measurement: In petroleum refining equipment, by measuring the temperature difference between the inlet and outlet of heat exchangers and the temperature gradient in different sections of pipelines, the heat transfer efficiency or blockage of equipment can be judged. The voltage difference input function of FBM212 can directly collect millivolt-level signals corresponding to temperature differences, supporting efficient process optimization.

2. Metallurgy and Metal Processing

• Smelting Furnace Temperature Control: In the smelting of iron and steel and non-ferrous metals, the temperature of the hearth of blast furnaces and converters is a core process parameter (usually up to 1000°C or higher). The FBM212 is compatible with high-temperature thermocouples such as S-type (platinum-rhodium), which can stably collect high-temperature signals, provide accurate data for furnace temperature adjustment, and ensure smelting efficiency and metal purity.
• Heat Treatment Process Monitoring: In metal heat treatment processes such as annealing and quenching, it is necessary to strictly control the temperature uniformity in the furnace. The FBM212 can connect multiple thermocouples at the same time, collect temperatures in different areas in real-time, and control heating elements through the linkage of the DCS system to ensure the quality of workpiece heat treatment.

3. Power Industry

• Boiler and Steam Turbine Temperature Monitoring: In thermal power plants, the tube wall temperature of boiler superheaters and reheaters, and the cylinder temperature of steam turbines are key safety parameters. The FBM212 can collect thermocouple signals and quickly feedback over-temperature alarms to prevent equipment damage due to high temperature; at the same time, it supports measuring the temperature difference between the generator stator and rotor to judge the insulation status.
• Transformer Temperature Monitoring: Monitor the temperature of transformer windings and oil surface through thermocouples, and analyze the efficiency of the heat dissipation system in combination with voltage difference signals to avoid insulation aging or short-circuit faults caused by overheating.

4. Food and Pharmaceutical Industry

• Sterilization Process Temperature Control: In the steam sterilization (such as moist heat sterilization) in the pharmaceutical industry or the pasteurization in food processing, it is necessary to precisely control the temperature (such as 121°C constant temperature). The high-precision collection of thermocouple signals by FBM212 (with minimal error) can meet the strict requirements of GMP for process parameters, ensure the sterilization effect and retain complete temperature records.
• Cold Chain Temperature Monitoring: In the cold chain transportation or storage of biopharmaceuticals, the ambient temperature is collected through thermocouples. The FBM212 can capture tiny temperature fluctuations (such as ±0.1°C changes) to ensure the stability of temperature-sensitive products such as vaccines and biological agents.

5. Energy and Environmental Protection

• Solar/Nuclear Energy Equipment Monitoring: In solar thermal power stations, the temperature of collectors is measured through thermocouples; in nuclear reactor auxiliary systems, the temperature distribution of pipelines and containers is monitored. The wide temperature stability and anti-interference ability of FBM212 can adapt to the signal collection needs of such special environments.
• Waste Gas/Waste Liquid Treatment: In environmental protection equipment, measure the flue gas temperature at the outlet of incinerators and the temperature of waste liquid treatment reactors, and analyze the treatment efficiency in combination with temperature difference. The reliability of FBM212 can ensure long-term stable operation in corrosive gas environments.