Description
Product Description
The IMHSS05 is a dual-function control module used within ABB Symphony Plus, Harmony Rack, and INFI 90 distributed control platforms. It is engineered to manage electro-hydraulic actuation loops and, in certain system configurations, support high-speed serial communication interfaces.
In hydraulic control applications, the module operates as a precision interface between the control system and servo-driven actuators, ensuring accurate positioning of turbine valves and hydraulic systems under dynamic load conditions. It is widely implemented in power generation units, steam turbine governors, and industrial fluid control systems requiring fast and stable closed-loop response.
System Role & Functional Design
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Electro-hydraulic servo valve control for closed-loop positioning systems
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Supports feedback integration from LVDT, RVDT, and 4–20 mA sensors
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Converts control commands into high-precision hydraulic actuator signals
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Optional use as serial communication interface (RS-232 / RS-422 / RS-485 depending on configuration)
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Compatible with ABB INFI 90, Net 90, and Symphony Plus architectures
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Designed for redundant and safety-critical turbine control loops
Electrical Characteristics
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Logic supply: +5 V DC (approx. 4.7 VA typical consumption)
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Field supply: +24 V DC (approx. 13.7 VA typical consumption)
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Backplane-powered module integration within Harmony/INFI rack systems
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Low-noise signal design optimized for control stability
Control & Feedback Processing
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Accepts hydraulic position feedback via LVDT / RVDT transducers
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Supports analog feedback signals including 4–20 mA loops
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Generates servo-level output signals for hydraulic valve actuation
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High-speed response architecture suitable for turbine transient control
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Designed for deterministic closed-loop performance in critical systems
Environmental & Mechanical Specifications
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Operating temperature: 0°C to +60°C
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Storage temperature: –40°C to +85°C
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Humidity tolerance: 5–95% RH non-condensing
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Industrial-grade EMI resistance and vibration durability
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Standard Harmony Rack module format
Application Areas
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Steam turbine control and valve positioning systems
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Hydro turbine governor and hydraulic regulation loops
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Industrial electro-hydraulic actuation systems
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Process control environments requiring fast feedback response
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Legacy ABB INFI 90 modernization and system integration projects
FAQ
Is IMHSS05 only a hydraulic control module?
Primarily yes, but certain system configurations also enable it to function as a serial communication interface module.
Can it be used in redundant systems?
Yes, it supports redundant configurations for turbine protection and high-reliability control architectures.
What feedback devices are supported?
It supports LVDT, RVDT, and standard 4–20 mA analog position feedback devices.
