Description

Product Overview

The FOXBORO 69TA-2RH is a current-to-pneumatic (I/P) signal converter, belonging to Foxboro 69TA series industrial signal transducers. It converts 4–20 mA electrical analog control signals from DCS/PLC into proportional pneumatic output pressure for driving pneumatic valve positioners and actuators in chemical, refinery and power plant process control loops. This hardware eliminates signal conversion mismatch and enables the use of pneumatic final control elements with modern electronic control systems. Process control engineers and plant reliability teams rely on this spare instrument for maintenance and retrofits of legacy control loops. The unit is equipped with local zero and span adjustment knobs, and status indicators for rapid on-site calibration and troubleshooting.

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Technical Specifications

• Product Model: 69TA-2RH
• Brand: Foxboro / Schneider Electric
• Warranty: One Year
• Input Signal: 4–20 mA DC
• Operating Temperature: -20 °C to 60 °C
• Storage Temperature: -40 °C to 85 °C
• Response Time: Fast proportional pneumatic output response
• Protection Class: IP30 housing
• Accuracy Class: ±0.2% full scale
• Output Pressure: Standard 3–15 psi (20–100 kPa) pneumatic
• Rated Current Range: 4–20mA input, max loop resistance matched to controller
• Communication Interface: 4–20mA analog input; pneumatic pressure output
• Supported Protocols: Analog 4–20mA
• Overload Capacity: Short-circuit protection for electrical input; surge and ESD suppression
• Dimensions: Standard panel mount housing

Application Scenarios

• Chemical Plant Control Valve Actuation: This I/P converter receives 4–20mA valve command signals from DCS and outputs pneumatic pressure to drive control valve positioners. The 69TA-2RH provides stable conversion for backpressure, flow and temperature control loops.
• Refinery Distillation Column Process Control: Installed in control room panels, it interfaces electronic DCS signals to pneumatic actuators for steam and hydrocarbon control valves.
• Pulp & Paper Mill Pneumatic Control Retrofit: The unit upgrades legacy pneumatic valve systems to work with modern electronic DCS without replacing existing valve actuators.