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The Foxboro FBM202 is a high-performance 8-channel isolated thermocouple input module designed for the I/A Series distributed control system. This module interfaces directly with standard thermocouple sensors (Types J, K, T, E, R, S, B, and N) and millivolt signals, providing precise temperature data to the controller backplane. By providing individual channel-to-channel isolation, the FBM202 effectively eliminates ground loop interference and protects control logic from field-side transients. It is a critical component for temperature monitoring in oil refineries, petrochemical plants, and power generation facilities.
The FBM202 is primarily utilized in industrial automation environments requiring high-density, reliable temperature sensing. Common applications include boiler monitoring, furnace control, chemical reactor temperature tracking, and general process temperature acquisition within I/A Series control networks.
| Model | FBM202 |
| Module Type | 8-Channel Thermocouple / mV Input |
| Input Ranges | Type B, E, J, K, N, R, S, T and -20 to +100 mV |
| Accuracy | +/- 0.03 percent of span (typical) |
| Isolation | 600 V AC channel-to-channel and channel-to-ground |
| Power Consumption | 3 W maximum |
| Operating Temperature | -20 to +70 deg C |
| Storage Temperature | -40 to +85 deg C |
| Relative Humidity | 5 to 95 percent (non-condensing) |
| Compliance | G3 harsh environment rating (ISA Standard S71.04) |
The FBM202 is designed for standard I/A Series baseplates. Please verify your specific baseplate revision and power supply configuration to ensure compatibility with the module's power requirements.
The FBM202 is designed to read passive thermocouple signals directly. It does not require external excitation for the thermocouples themselves, though it does require the standard 24V DC power provided by the I/A Series baseplate.