Description

GE IS220PDOAH1A – Discrete Output Pack Module

GE IS220PDOAH1A is a discrete output (DO) pack module for GE’s Mark VIe turbine control systems, interfacing Ethernet networks with relay terminal boards to drive field actuators and annunciators. It controls up to 12 relays—either magnetic or solid-state—while monitoring coil feedback for status verification, supporting simplex, dual, or TMR configurations. This module addresses actuation reliability in gas turbines by providing optical isolation, soft-start power sequencing, and low-latency response (6 ms from command to output), minimizing control loop delays in safety-critical sequences. Equipped with diagnostic LEDs and an infrared port, the GE IS220PDOAH1A enables hot-pluggable maintenance and Ethernet-based health monitoring in power plant enclosures.

Technical Specifications

• Brand: GE

• Model: IS220PDOAH1A

• Warranty: One Year

• Condition: 100% New & Original

• Series: Mark VIe​

• Relay Channels: 12 (magnetic or solid-state)​

• Power Input: 3-pin connector, 28 VDC nominal​

• Communication: Dual RJ45 Ethernet ports​

• Output Connector: DC-37 pin​

• Operating Temp: -30°C to +65°C​

• Dimensions: 8.26 cm H x 4.19 cm W x 12.1 cm D​

• Processor: Shared with Mark VIe I/O packs

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Key Features & Benefits

• Relay Control & Feedback: Drives 12 relays with coil monitoring, detecting load connection via current sense for accurate interlock and trip confirmation.​

• Multi-Mode Operation: Supports simplex (1 pack), dual (2 packs), or TMR (3 packs) redundancy, adapting to availability requirements without hardware changes.​

• Self-Diagnostics: Onboard processor runs self-tests on startup, with LEDs and IR port for local troubleshooting, reducing mean-time-to-repair.​

Application Scenarios

• Gas Turbine Actuation: Energizes fuel valves, igniters, and starter relays during startup/shutdown sequences in Mark VIe controls.​

• Steam Turbine Interlocks: Manages discrete outputs for thrust protection and emergency trips in combined-cycle plants.​

• Generator Protection: Controls breaker commands and alarm relays based on fault detection in power generation systems.

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Frequently Asked Questions (FAQ)

• Q: What is the primary function of the GE IS220PDOAH1A?

  • A: It interfaces Ethernet controllers with discrete relay terminal boards, controlling 12 outputs and monitoring feedback in Mark VIe systems.​

• Q: Is GE IS220PDOAH1A compatible with legacy systems?

  • A: Yes, it connects via standard TRLY/SRLY terminal boards and Ethernet IONet, integrating with GE Speedtronic Mark VI upgrades.