General Electric IS220YDOAS1A Mark VIe Discrete Output Pack

Product Overview

The IS220YDOAS1A functions as a high-density Discrete Output (YDOA) I/O pack within the General Electric Mark VIe control architecture. This Brand New original module digitizes and executes command signals for turbine auxiliary systems, managing solenoids, relays, and interposing circuits. Manufactured in the USA, this pack serves as a critical interface between the IONet redundant controller network and the field-side terminal boards, ensuring deterministic switching logic for gas and steam turbine operations.

Technical Specifications

The IS220YDOAS1A utilizes a specialized hardware layer to provide low-noise, high-precision switching capabilities.

Engineering Advantages

• Optimized Signal Integrity: The pack maintains a 280 mV pk ripple limit on the N28 power line. This strict noise suppression prevents electrical interference from corrupting sensitive digital logic, ensuring the module executes output commands without chatter or false triggers.

• High-Density Buffered Outputs: Fourteen independent buffered output channels reside within a single compact housing. This high density allows engineers to consolidate relay control points, significantly reducing the physical footprint of the I/O rack in crowded control rooms.

• Direct Terminal Board Integration: The IS220YDOAS1A plugs directly onto specialized terminal boards via a high-density D-type connector. This eliminates internal cabinet wiring, reduces potential points of failure, and accelerates the commissioning process for new turbine control skids.

• Redundant Network Compatibility: Dual Ethernet RJ45 ports allow the pack to communicate across the Mark VIe IONet. If one network path encounters a fault, the pack maintains communication with the controller, providing the high availability required for mission-critical industrial applications.

FAQs

• Is this IS220YDOAS1A module a factory-new original?

  Yes. We supply this unit as a 100% Brand New original GE factory-sealed product. It arrives in original anti-static packaging with all factory inspection markings, ensuring it has never been deployed in a field environment.

• Does the pack require external power for its buffered outputs?

  The module draws power from the N28 supply (28 V DC). You must ensure the power supply remains within the 400 mA maximum current limit to maintain the rated 280 mV pk ripple performance and protect the internal switching transistors.

• What determines the output voltage of the buffered channels?

  The output voltage typically follows the N28 supply voltage. The IS220YDOAS1A acts as a high-speed electronic switch; therefore, the quality and stability of your system’s power distribution module directly impact the output signal quality.

• Can I replace an "S1A" pack with a later "S1B" version?

  While later revisions often maintain backward compatibility, you must verify the firmware version within your ToolboxST configuration. The S1A remains a standard, active revision for many Mark VIe systems requiring specific 14-channel output mapping.