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GE IS420YDIAS1B｜Analog I/O Moduler｜
? GE IS420YDOA1B – Discrete Output Module
Function: Controls relays to switch external devices on/off as instructed by the control system.
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Power Supply: 24 VDC
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Channels: 12 discrete output channels
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Output Type: SPDT (Single Pole Double Throw) relay contacts
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Relay Type: Plug-in, serviceable
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Max Output Current: 2 A per channel
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Contact Life: >10 million operations
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Communication Speed: Up to 1 Mbps
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Operating Temperature: –40 °C … +70 °C
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Typical Application: Relay actuation for external electrical equipment control
? GE IS220YDIAS1B – Discrete Input Module (Safety Critical)
Function: Collects and transmits safety-critical sensor and actuator data to the control system, ensuring safe and reliable gas turbine operation.
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System Role: Part of the Mark VIe gas turbine control system
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Input Function: Acquires discrete signals from safety-critical field devices
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Safety: Designed for reliability and fault tolerance in turbine protection
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Application: Monitoring of turbine safety devices (e.g., limit switches, protection relays, interlocks)
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Integration: Transmits sensor/actuator status to control logic for real-time decision making
✅ Summary:
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IS420YDOA1B is an output-side module, focusing on actuation (relay control).
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IS220YDIAS1B is an input-side module, focusing on data acquisition from safety-critical sources.
Together, they form complementary parts of the Mark VIe I/O subsystem for gas turbine monitoring, protection, and control.
GE IS420YDIAS1B｜Analog I/O Moduler｜
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By structuring the information in this manner, the article provides a clear and organized understanding of input channels, transducer supply, and communication implementations in distributed control systems.
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