Product Overview

• Part No: IR139-1
• Brand: ALSTOM

• Category: Digital Control Interface ModuleIR139-1 is a standard Eurocard rack-mounted interface module designed for ALSTOM legacy power automation systems. It realizes multi-channel digital signal acquisition, logic signal conversion and internal rack bus communication. The module transmits field switching status and control commands between the main controller and peripheral I/O boards, supporting protection interlock, sequence control and alarm signal transmission. It serves as an important spare part for maintenance and overhaul of thermal power plant turbine control cabinets and DCS systems.

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Core Features

• Multi-channel binary signal conditioning and isolated signal transmission
• Standard Eurocard pull-out structure, supports quick plug-and-play replacement
• Front panel status indicators for convenient on-site fault diagnosis
• Built-in noise filtering circuit, strong anti-interference for power plant electromagnetic environment
• Industrial PCB layout, optional conformal coating to adapt humid cabinet conditions

• Passed thermal cycling, vibration and EMC reliability long-term operation testing

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Technical Specifications

• Supply Voltage: 24VDC
• Operating Temperature: -20°C ~ +60°C
• Storage Temperature: -40°C ~ +85°C
• Installation: Standard subrack slot mounting inside control cabinet

• Protection Class: IP20

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Compatibility & Application

• Compatible with ALSTOM SIRE turbine control racks and legacy DCS platforms
• Widely used in thermal power plant steam turbine control system maintenance and retrofitting
• Applied for auxiliary equipment interlock signal transmission, protection trip circuit interface and status feedback collection