Overview
The Foxboro RTT20-D1BNQFN-L3 is an intelligent temperature transmitter designed for demanding industrial process control applications. Part of the Foxboro I/A Series, this unit combines precise temperature measurement with 4-20mA HART communications for real-time monitoring and diagnostics. The microprocessor-based design enables advanced self-diagnostics, automatic calibration, and flexible input signal conditioning.
Key Features
- 4-20mA output with HART protocol for bidirectional communication and remote configuration
- Accepts RTD (2, 3, or 4-wire), thermocouple, millivolt, and ohm sensor inputs
- Automatic self-diagnostics and self-calibration capabilities
- Microprocessor-based intelligent signal processing for superior accuracy
- LED indicator option for local status and troubleshooting
- Multiple housing configurations available for various mounting orientations
- HART communicator, PC-based configurator, or I/A Series system configuration options
Technical Specifications
- Output Signal: 4-20mA with HART protocol
- Input Types: RTD (2, 3, 4-wire), thermocouple (Types B, C, E, J, K, L, N, R, S, T), millivolt, ohm
- Series: Foxboro I/A Series
- Housing: Standard industrial enclosure with multiple configuration options
- Accuracy: ±0.05% of span (HART)
- Certification: ATEX flameproof available; explosion-proof rating options
- Operating Ambient: -40°C to +70°C (standard ATEX rating)
- Power Supply: Compatible with standard 4-20mA loop powered and externally powered configurations
Typical Applications
- Petrochemical and oil & gas process monitoring
- Refinery temperature measurement and control
- Chemical processing facilities requiring hazardous area certification
- Power generation and steam system temperature control
- Food and beverage processing with strict temperature regulation
- Pharmaceutical manufacturing and sterile environment monitoring
Compatibility & Replacements
Compatible With
- Foxboro I/A Series control systems and field device networks
- HART Field Communicators for handheld configuration and diagnostics
- Foxboro PC-based Configurator software
- Industrial programmable logic controllers (PLCs) supporting 4-20mA HART input modules
- SCADA and distributed control systems (DCS) with HART protocol support
- Standard process control instrumentation networks using analog 4-20mA signals
Replaces / Drop-In Replacement For
This unit is a direct replacement for other RTT20 variants in the same series. Verify part number configuration (input type, output range, housing style) against your system requirements before ordering. Similar RTT20 models with alternative output protocols (standard 4-20mA without HART, Foundation Fieldbus, PROFIBUS PA) may require different integration steps.
Works With
- HART protocol for remote digital communication and device configuration
- Foxboro ABO991 software platform
- Industrial RTD and thermocouple signal sources
- External cold junction compensation sources (for thermocouple inputs)
- Standard 2-wire, 3-wire, and 4-wire RTD wiring configurations
- Loop-powered or externally powered supply architectures
