Description
Technical Specifications
- Product Model: IMHSS03-MA
- Brand: ABB
- Warranty: One Year
- Input Voltage: 24 VDC ±10%
- Operating Temperature: -20°C ~ +70°C
- Storage Temperature: -40°C ~ +85°C
- Response Time: ≤10 ms
- Protection Class: IP20 (Rack-mounted electronics)
- Accuracy Class: ±0.25% Full Scale
- Output Frequency: 1 kHz maximum control loop
- Rated Current Range: 0–200 mA servo drive output
- Communication Interface: INFI 90 Backplane Bus
- Supported Protocols: ABB INFI 90 DCS Internal Bus
- Overload Capacity: Continuous 120% rated current; short-circuit electronic protection
- Dimensions: 330 mm × 51 mm × 203 mm
Product Overview
The IMHSS03-MA is a dedicated hydraulic servo control module built for ABB INFI 90 distributed control systems. It acts as a critical interface between multi-function processor modules and hydraulic servo valves, delivering closed-loop position regulation using LVDT position feedback. This hardware solves stability and precision challenges in turbine valve control loops, eliminating signal drift and slow actuator response during dynamic load fluctuations. Plant control engineers, DCS maintenance teams, and system integrators managing thermal and combined-cycle power facilities benefit from this module’s native DCS compatibility and built-in circuit diagnostics. The unit supports standard function code configuration, enabling streamlined commissioning without custom signal conversion hardware for hydraulic actuation loops.
Application Scenarios
- Thermal Power Generation – Steam Turbine Control: The module governs throttle valves, control valves, and bypass actuators. It processes real-time LVDT feedback to adjust servo valve current, stabilizing turbine rotational speed during grid load variations and preventing unsafe pressure spikes across steam circuits.
- Combined-Cycle Power Plants – Gas Turbine Regulation: This automation component controls fuel valves and inlet guide vanes. Fast closed-loop response maintains consistent air-fuel ratios, reduces combustion oscillation, and supports reliable startup and load ramp sequences for gas turbine assets.
- Industrial Cogeneration Facilities – Process Valve Positioning: Used for hydraulic actuator control on boiler dampers and pressure regulating valves. Its overload protection safeguards sensitive hydraulic hardware during transient plant upset conditions and extends service intervals for critical control equipment.
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