FOXBORO 834DP-INA1 is a high-performance electronic transmitter, belonging to Foxboro BIC3 series product line, which is mainly used for monitoring and controlling process parameters in industrial automation scenarios. Its core functions include signal conversion, data transmission, and system integration for accurate measurement of critical parameters such as pressure and flow. As an important part of the Foxboro I/A Series control system, the device realizes real-time monitoring of the production process by seamlessly interfacing with the DCS (decentralized control system).
Technical Parameters.
1. Measurement accuracy: reference Foxboro similar transmitters (such as 843DP series), the accuracy of up to ± 0.075% of range
Output signal: support for 4-20mA analog signal and HART protocol digital communication, compatible with intelligent devices two-way data interaction
Environmental adaptability: Designed to meet G3 industrial environmental standards, withstand temperature range -40°C to 85°C, humidity up to 95% non-condensing.
2. Power supply requirements: Typical operating voltage 24VDC, power consumption less than 5W, to meet the needs of low energy consumption.
As an integral part of the Foxboro DCS ecosystem, the 834DP-INA1 benefits from technological upgrades to the EcoStruxure™ architecture, notably:
Enhanced openness: Cross-platform communication with third-party devices (e.g., ABB, Siemens controllers) is realized via Ethernet, Modbus, and other protocols, breaking through the limitations of traditional DCS closure.
Long-life compatible design: Hardware support for downward compatibility, such as Fieldbus module (e.g. FBM215) can be upgraded to HART 7.0 protocol, without the need to replace the field wiring.
Cloud integration capability: with Foxboro Control Core Services software v9.0+, supports remote FAT/SAT testing and data analysis, reducing on-site commissioning time.

As an example of Foxboro’s “Long Life Architecture” philosophy, the 834DP-INA1 demonstrates a unique balance of value in the Industry 4.0 transformation – retaining the reliability of legacy hardware while embracing digitization through incremental upgrades.
With Schneider Electric’s continued investment in the Foxboro product line, the device is expected to achieve breakthroughs in openness and intelligence, consolidating its strategic position in the core control layer of the process industry.
Applications include:
Petrochemical field
Signal conversion for differential pressure flowmeters in refinery FCC units for real-time monitoring of catalyst cycling rates with <0.1% control error
Case: PEMEX oil field in Mexico through the integration of 834DP-INA1 and Foxboro DCS, realize the pipeline pressure fluctuation early warning, reduce the downtime incident by 37%.
Power Industry
The pH monitoring chain in the desulfurization system of a coal-fired power plant optimizes limestone slurry injection and reduces SO₂ emissions by 15% through the fusion of multi-point transmitter data.
Upgraded boiler feedwater control system at Changshu Power Plant, increasing thermal efficiency by 2.3%.
Water treatment field
In reverse osmosis membrane group pressure monitoring, its high-precision features are utilized to achieve dynamic adjustment of transmembrane differential pressure (TMP), extending the life of the membrane module by more than 30%.
