Description
Product Description
The IMTSA01 is a turbine speed interface module used in ABB Bailey INFI-90 control systems. It is engineered to convert high-frequency pulse signals from turbine speed sensors into stable digital values for monitoring, control, and protection applications in power generation environments.
It is commonly deployed in steam and gas turbine systems where accurate rotational speed feedback is required for governor control and overspeed protection logic.
Signal Processing and Measurement
The IMTSA01 supports multiple industrial turbine speed sensing methods and performs reliable signal conditioning and frequency conversion.
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Operating speed range: 0–10,000 RPM (typical application range)
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Input frequency range: 100 Hz–2 kHz depending on configuration
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Measurement accuracy: ±0.1% of full scale under calibrated conditions
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Supported sensor types:
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Magnetic pickup sensors
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Active proximity probes
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Signal processing: Pulse shaping, filtering, and noise suppression for stable output
Electrical Characteristics
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Supply voltage: 24 VDC nominal
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Current consumption: up to 0.32 A
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Power interface: INFI-90 backplane or system terminal supply depending on installation
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Output signal: Digitized speed data for control system processing
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Electrical isolation: Industrial-grade isolation between field input and control circuitry
System Integration
The module integrates directly into ABB INFI-90 and Symphony Plus architectures as a turbine speed input interface.
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Function role: Real-time turbine speed acquisition
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Control usage: Governor control loops and overspeed protection systems
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System role: Input module for turbine monitoring and diagnostics
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Data exchange: Backplane-based communication within ABB DCS architecture
Environmental Specifications
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Operating temperature: -20°C to +60°C
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Storage temperature: -40°C to +85°C
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Humidity range: 0–95% non-condensing
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Designed for continuous operation in industrial environments
Mechanical Design
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Mounting type: ABB INFI-90 rack-mounted module
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Dimensions: 120 × 100 × 35 mm (variant dependent)
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Weight: 0.5 kg
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Construction: Rugged industrial-grade electronics for long-term reliability
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Installation: Plug-in module compatible with standard INFI-90 racks
Key Features
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High-precision turbine speed measurement
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Stable operation in electrically noisy environments
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Compatibility with magnetic pickup and proximity probe sensors
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Fast response for protection-level control systems
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Designed for legacy ABB turbine control infrastructure
Application Areas
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Steam turbine control systems
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Gas turbine monitoring and protection
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Power plant generator speed supervision
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Overspeed protection and emergency shutdown systems
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Spare part replacement in ABB INFI-90 installed base systems
FAQ
Q1: Does IMTSA01 support Ethernet or modern industrial networks?
No. It is designed for ABB INFI-90 systems and communicates via backplane integration.
Q2: What sensors are supported?
It supports magnetic pickup sensors and active proximity probes depending on system configuration.
Q3: Can it be used in new control system installations?
It is mainly intended for maintenance and replacement in existing ABB legacy systems.
