Product Description

The P0400YD is an FBM03-series RTD input module for the Foxboro I/A Series control system. It is designed for high-accuracy, high-density temperature measurement by converting RTD resistance signals into digital data for redundant Fieldbus communication.

The module features eight fully independent, galvanically isolated input channels, preventing noise coupling, ground loops, and cross-channel interference. Flexible wiring support allows different RTD configurations to be used simultaneously, enabling optimized accuracy across varying sensor distances and process conditions.

Technical Specifications

Application Scenarios

The P0400YD is commonly applied in systems requiring precise and stable temperature measurement, including:

• Cryogenic storage and transfer systems

• Distillation column temperature profiling

• Boiler feedwater and thermal balance monitoring

• High-accuracy laboratory or pilot plant measurements

Support for 4-wire RTDs makes the module particularly suitable where lead-wire resistance compensation is critical.

Technical FAQ

Lead-Wire Compensation in 3-Wire RTDs
The module measures and compensates for lead resistance using its third wire reference, assuming equal wire length and gauge, minimizing offset caused by long cable runs.

Mixed RTD Configuration Capability
Yes. Each channel is electrically isolated and independently configurable, allowing a mix of 2-wire, 3-wire, and 4-wire RTDs as long as sensor resistance remains within the 0–320 Ω range.