Description
Core Product Summary
The Foxboro E69F-T-I2-JRS (Schneider Electric) is a high-performance, field-mounted current-to-pneumatic (I/P) signal converter. It converts a standard 4 to 20 mA DC electrical input signal from a controller or Distributed Control System (DCS) into a proportional 0.2 to 1.0 bar (3 to 15 psi) pneumatic output signal to drive pneumatic control valve actuators, dampers, and air-operated positioning units.
Housed in a rugged, weather-resistant enclosure, the E69F-T-I2-JRS features an electro-pneumatic force-balance mechanism that maintains fast response times and low air consumption. The unit includes integrated supply air regulation and output pressure indication, making it well-suited for demanding process control installations across chemical refineries, power generation plants, and paper mills.
Key Technical Specifications
| Parameter | Specification |
| Manufacturer | Foxboro (Schneider Electric) |
| Model Code | E69F-T-I2-JRS |
| Product Type | Field-Mounted Current-to-Pneumatic (I/P) Converter |
| Input Signal | 4 to 20 mA DC |
| Output Signal Range | 0.2 to 1.0 bar / 20 to 100 kPa (3 to 15 psi) nominal |
| Operating Principle | Electro-pneumatic force balance system |
| Supply Air Pressure | Clean, dry instrument air (typically 1.4 to 2.1 bar / 20 to 30 psi) |
| Enclosure Rating | NEMA 4X / IP65 industrial weatherproof enclosure |
| Air Connections | 1/4 NPT female pneumatic supply and output ports |
| Conduit Connection | 1/2 NPT female electrical entry |
Detailed Product Overview
The Foxboro E69F-T-I2-JRS serves as an indispensable electro-pneumatic interface in automated control loops. In modern industrial processing, centralized control systems output electronic analog signals (4-20 mA), whereas heavy-duty final control elements—such as globe valves, butterfly valves, and louver dampers—rely on pneumatic force for actuation. The E69F-T-I2-JRS bridges these systems with high linearity and minimal deadband.
The converter operates on an electro-pneumatic force-balance principle. Incoming control loop current passes through a coil located within a magnetic field, creating a proportional force on a balanced flapper assembly. This flapper varies air restriction at a pneumatic nozzle, regulating internal pilot pressure to produce a stabilized proportional air output signal directly to the valve actuator or positioner.
Designed for field mounting directly on or near control valves, the housing features external zero and span adjustment points. This allows calibration technicians to tune the converter output directly in the field without opening the main electronics enclosure or interrupting loop wiring.
System Compatibility & Integration Requirements
| Item / Dependency | Verified Compatibility or Requirement | Practical Note |
| Control Signal Source | 4–20 mA Analog Control Loop (PLC / DCS output channel) | Two-wire loop-powered configuration. |
| Instrument Air Quality | Clean, dry, oil-free instrument air (ISA S7.3 compliant) | Install a dedicated air filter/regulator upstream to prevent nozzle contamination. |
| Actuator Compatibility | Pneumatic Control Valve Actuators, Positioners, & Cylinders | Output drive volume matches standard diaphragm and piston actuators. |
E69F-T-I2-JRS
E69F-T-I2-JRS
Dimensions, Mounting & Connection Notes
- Mounting Configuration: Designed for direct pipe-mounting via a standard 2-inch pipe yoke kit or bracket attachment to valve actuator yokes.
- Pneumatic Porting: Connected via 1/4 NPT female tapped supply and output gauge ports. Ensure all threaded air joints are sealed with PTFE tape or approved thread sealant.
- Electrical Cabling: Electrical wiring enters through a 1/2 NPT conduit port to internal screw terminals; use proper conduit sealing hubs to preserve NEMA 4X weather tightness.
- Calibration Procedure: External zero and span adjustments are accessible on the housing. Always verify input current with a calibrated loop calibrator while measuring output air pressure with a certified test gauge during setup.
FAQ
What is the primary function of the Foxboro E69F-T-I2-JRS?
The Foxboro E69F-T-I2-JRS is an I/P converter that translates a 4–20 mA DC electrical input signal into a proportional pneumatic output signal (such as 3–15 psi) to operate pneumatic control valves and actuators.
What type of instrument air supply does the E69F-T-I2-JRS require?
The unit requires clean, dry, oil-free instrument air filtered to industrial quality standards, typically supplied at 20 to 30 psi (1.4 to 2.1 bar).
Can the E69F-T-I2-JRS be calibrated in the field?
Yes, the E69F series features accessible external zero and span adjustment screws, allowing technicians to calibrate the unit directly at the valve site.
What is the enclosure rating of this converter?
The unit is housed in a heavy-duty cast enclosure rated for NEMA 4X / IP65 environmental protection, making it suitable for outdoor and harsh industrial installations.
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