The TRICONEX Invensys 3721 is a professional-grade HART Analog Input Interface Module designed for industrial automation and process control applications. This module enables seamless integration of HART protocol communication with existing 4-20 mA analog signal loops.

Highway Addressable Remote Transducer (HART) is an industry-standard field bus protocol that superimposes a Frequency Shift Keyed (FSK) signal onto standard 4-20 mA current loops. The integrated Tricon Model 2071H HART Multiplexer Module capacitively couples HART signals to analog input/output signals without interfering with primary process measurements.

• HART signal operates at ±0.5 mA with frequencies of 1,200 Hz and 2,200 Hz
• Maintains complete isolation from low-bandwidth 4-20 mA safety signals
• Certified non-interference with analog input and output module operations

This HART Interface Module requires Tricon v10.4.x or later systems. Earlier Tricon systems must be upgraded to version 10.4.x to utilize HART functionality. Chassis requirements vary depending on the original system version as specified in the Tricon Chassis Usage for HART Communication documentation.