Foxboro H90JE9A001J0 Servo Controller

Product Description

H90JE9A001J0 is a Foxboro H90 series servo controller. It is a legacy high-precision servo regulator designed for electro-hydraulic actuator and hydraulic servo motor closed-loop position control on steam turbines and gas turbines. It accepts setpoint signals from DCS or speed regulators and outputs drive signals to servo valves for precise valve stroke regulation. This model is discontinued and only circulated as spare part for legacy turbine control systems. It features fast response, oil-field noise immunity and position feedback for electro-hydraulic governor systems.

Technical Specifications

• Model: H90JE9A001J0
• Series: H90 Servo Controller
• Control type: Analog closed-loop servo with position feedback
• Setpoint input: ±10 V analog command
• Output: Drive current for servo valve
• Feedback: LVDT valve position signal input
• Control accuracy: ≤±0.1%FS
• Bandwidth: High dynamic response for turbine governing
• Power supply: DC ±15V / 24V
• Operating temperature: 0℃ ~ +60℃
• Housing: Sealed metal enclosure for turbine cabinet humid & oily environment
• Diagnosis: Fault LED, feedback wire break detection, output over-limit alarm
• Mounting: Rack plug-in, turbine control cabinet backplane mounted
• Certifications: CE, power turbine governing standard compliant
• Matching components: LVDT displacement sensor, electro-hydraulic servo valve

Application

1. Hydraulic servo motor closed-loop position control for steam turbine DEH governing system
2. Fuel valve and guide vane actuator servo regulation for gas turbines
3. Turbine speed control loop, receiving DEH command to drive servo valve
4. Spare replacement and retrofitting for legacy Foxboro turbine control in power plants
5. Precise stroke servo control for EH electro-hydraulic actuators

Series Models

H90JE9A002J0, H90JE9A003J0, H90JB9A001J0, H90JC9A001J0