Introduction
The IS200ERIOH1AAA is an emergency relay I/O module designed by GE for Mark VI and Mark VIe turbine control systems. In system integration projects, this board is valued for its ability to interface emergency logic signals with the control platform while maintaining electrical isolation and predictable switching behavior. It provides a clean, reliable bridge between field-level emergency contacts and the higher-level control logic used in protection and shutdown sequences.
Engineers frequently select this module when upgrading or expanding protection circuits that must meet strict reliability and response requirements.
Technical Specifications
| Parameter | Details |
|---|---|
| Marque | GE |
| Modèle | IS200ERIOH1AAA |
| Module Type | Emergency Relay Input/Output Module |
| System Compatibility | Mark VI / Mark VIe |
| I/O Capacity | Combination sur isolated relay inputs and command-driven relay outputs |
| Relay Construction | Industrial-grade electromechanical relays |
| Isolation Method | Relay-based galvanic isolation |
| PCB Construction | Multilayer with protective conformal coating |
| Operating Temperature | –20°C to +65°C |
| Dimensions | Approx. 280 mm × 160 mm × 32 mm (11.02 in × 6.30 in × 1.26 in) |
| Poids | Approx. 0.85 kg (1.87 lb) |
Application Scenarios
The IS200ERIOH1AAA fits into turbine and generator protection frameworks where emergency functions interface directly with the control system. It is commonly deployed in:
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Emergency stop (E-stop) chains
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Hardwired protection and shutdown loops
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Interlock systems requiring clean input isolation
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Emergency command output circuits
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Upgrades replacing aging ERIO/EROC/ERCB family modules
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Safety-critical environments demanding deterministic signal handling
This module ensures that emergency inputs and outputs remain stable even when environmental or load conditions fluctuate.
System-Level Advantages
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Unified emergency input and output functions reduce the number sur separate boards needed
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Consistent relay actuation timing, essential for coordinated trip sequences
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Clear electrical routing simplifies cabinet integration during project deployment
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Low susceptibility to electrical noise, supporting reliable field wiring connections
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Drop-in compatibility with GE-standard mounting and backplane interfaces
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Long operational life supported by high-quality relay components
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