Product Overview

• Part No: LC105A-1
• Brand: ALSTOM

• Category: Binary Relay I/O ModuleLC105A-1 is a standard Eurocard plug-in relay input/output module for ALSTOM SIRE steam turbine control platform. It collects field binary status signals and outputs relay contact commands for interlock, protection trip and auxiliary equipment sequence control. Built-in isolated relay circuits convert logic signals into dry contact signals to connect solenoid valves, relays and trip circuits. It cooperates with AH116-2 main control board, AL132, AS111-1 and AB121 modules, being a vital spare component for overhaul of thermal power plant turbine governing and protection cabinets.

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Core Features

• Integrated multi-channel digital input and relay contact output with electrical isolation
• Front panel LED indicators for channel status, convenient on-site fault inspection
• Standard pull-out Eurocard structure, supports quick replacement inside the subrack
• Built-in surge suppression circuit, strong anti-interference for power plant electromagnetic environment
• Optional conformal coating to resist humidity and dust inside control cabinets

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

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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 turbine control cabinet

• Protection Class: IP20

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Compatibility & Application

• Compatible with ALSTOM SIRE turbine control rack, matched with AH116-2, AL132, AS111-1, AB121, UT150-1 modules
• Widely used in thermal power plant steam turbine control system maintenance and retrofitting
• Used for protection trip signal output, valve interlock feedback, auxiliary equipment start-stop control