The IS220PDOAH1B is a high-performance Discrete Output (PDOA) pack designed for the GE Mark VIe control system. This module works in conjunction with the IS230SNRLH2A (Terminal Base) and the IS200SRLYH2A (Relay Termination Board) to provide a complete relay output solution for industrial turbine control and balance-of-plant automation.
Product Parameters
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Model Pack: IS220PDOAH1B (Discrete Output Pack)
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Terminal Base: IS230SNRLH2A (S-Type Network Relay Base)
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Relay Board: IS200SRLYH2A (12-Channel Relay Board)
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System Series: Speedtronic Mark VIe
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Output Channels: 12 Relay Outputs
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Power Input: 28V DC (Dual-redundant via backplane)
Product Specifications
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Processor: Integrated 32-bit RISC microprocessor for logic execution
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Isolation: Optically isolated from the internal Ionet communication bus
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Diagnostics: Monitoring of coil integrity and contact feedback
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Form Factor: Compact “Pack” design that mounts directly to the terminal base
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Redundancy: Supports Simplex, Dual, and Triple Modular Redundancy (TMR)
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Construction: Conformal coating for protection against industrial pollutants
Application Fields
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Gas Turbine Systems: Controlling fuel shut-off valves and auxiliary pumps.
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Steam Turbine Control: Managing solenoid valves for trip and reset logic.
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Power Distribution: Coordinating breakers and switchgear status.
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Industrial Automation: High-reliability logic execution in harsh environments.
Product Q&A
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Q: What is the relationship between the PDOA pack and the SRLY board?
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A: The PDOA pack (IS220) contains the control logic and processor, while the SRLY board (IS200) contains the physical mechanical relays and field wiring terminals.
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Q: Does the IS200SRLYH2A support “Dry” contacts?
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A: Yes, it provides 12 form-C relay contacts that can be used for both dry and wetted circuit applications.
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Q: Can the PDOA module be swapped while the system is powered?
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A: Yes, Mark VIe packs are designed for “Hot-Plug” replacement, provided the control strategy is configured for redundancy.
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