Description
Description
The Foxboro FBM203 is a high-precision, 8-channel RTD (Resistance Temperature Detector) input module designed for the I/A Series distributed control system. This module provides reliable temperature sensing by interfacing directly with 2-wire, 3-wire, or 4-wire RTD sensors, as well as resistance-based inputs. It is engineered for critical process industries, including power generation, pharmaceutical manufacturing, and food and beverage processing, where stable and repeatable measurements are essential. The FBM203 features individual channel-to-channel isolation to prevent ground loops and signal cross-talk, ensuring high data integrity in electrically noisy industrial environments.
Features
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High-Accuracy Sensing: Supports a wide range of RTD types, including Pt 100, Pt 200, Pt 500, Pt 1000, Ni 120, and Cu 10.
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Advanced Lead Compensation: Automatically compensates for lead-wire resistance in 3-wire and 4-wire configurations to maintain accuracy over long cable runs.
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Hot-Swappable Design: Allows for module replacement without powering down the baseplate, minimizing process downtime during maintenance.
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Configurable Noise Rejection: Programmable integration times (50 Hz or 60 Hz) to effectively filter out AC power line interference.
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Robust Diagnostics: Continuous internal self-diagnostics and hardware verification with reporting for sensor burnout or module failure.
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Environmental Durability: Rated for G3 harsh environments, ensuring long-term reliability in challenging industrial conditions.
Technical Specifications
| Model |
FBM203 |
| Input Channels |
8 Isolated RTD / Resistance channels |
| Sensor Types |
Pt 100, Pt 200, Pt 500, Pt 1000, Ni 120, Cu 10 |
| Input Resistance |
0 to 320 Ohms or 0 to 3200 Ohms |
| Accuracy |
+/- 0.02 percent of span |
| Isolation |
600 V AC channel-to-channel and channel-to-ground |
| Power Consumption |
3 W maximum |
| Operating Temperature |
-20 to +70 deg C |
| Environmental Rating |
G3 Harsh Environment |
Installation Guidelines
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ESD Handling: Always use an anti-static wrist strap and follow proper ESD precautions when handling the module to prevent damage to internal circuitry.
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Mounting: Designed for installation into the I/A Series baseplate. Ensure the module is fully seated and the locking mechanism is engaged.
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Wiring: Use shielded twisted-pair cabling for field inputs to maintain signal integrity. Ensure proper grounding of cable shields at the cabinet entry point.
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Power: The module supports hot-swapping; however, ensure the baseplate is properly powered and the system is in a state that allows for I/O module replacement.
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Environment: While rated for G3 environments, ensure the control cabinet is kept free of excessive dust, moisture, and corrosive gases to maximize equipment lifespan.
FAQ
Q: Can the FBM203 be replaced while the system is running?
A: Yes, the FBM203 is hot-swappable, allowing for replacement without powering down the baseplate or interrupting other modules in the rack.
Q: Does this module support 2-wire RTD sensors?
A: Yes, the FBM203 supports 2-wire, 3-wire, and 4-wire RTD configurations.
Q: What is the purpose of the G3 rating?
A: The G3 rating indicates that the module is designed to withstand harsh, corrosive industrial environments, providing higher reliability than standard commercial-grade components.
