GE IS200WROBH1A Relay Fuse And Power Sensing Card

GE IS200WROBH1A Relay Fuse & Power Sensing Card

The GE IS200WROBH1A, also cataloged as the IS200WROBH1A WROB Relay Fuse and Power Sensing Card, is a branch‑circuit power‑distribution module used within Mark VI Speedtronic turbine‑control cabinets. It provides fused AC/DC distribution, relay interfacing, and power‑sensing feedback for cabinet‑level loads.

Hardware Specifications

Backplane Bus Communication Velocity Licences

As a GE industrial control module, the IS200WROBH1A participates in deterministic Mark VI cabinet‑level power‑distribution timing. Branch‑circuit sensing supports stable propagation windows across turbine‑control loops without interfering with PPDA feedback channels. The board’s fuse‑protected outputs align with I/O density scaling across PDM assemblies and maintain compatibility with firmware flash compatibility for Mark VI controllers. When integrated into plant‑wide PLC/DCS networks, branch‑circuit feedback preserves deterministic behavior across Profinet / EtherNet/IP deterministic networks.

Functional Description

The IS200WROBH1A is part of the WROB branch‑circuit distribution family. It performs the following functions:

• Branch‑Circuit Power Distribution Routes core PDM power to cabinet‑level loads through fused outputs.
• Relay & Power Sensing Provides sensing feedback for branch circuits, enabling cabinet‑level diagnostics.
• Fuse Protection Twelve fuses rated at 3.15 A, 500 VAC / 400 VDC protect downstream loads.
• Mark VI Architecture Compatibility Supports simplex, dual, and TMR Mark VI configurations.

Frequently Asked Questions

Q: What is IS200WROBH1A? A: It is a WROB Relay Fuse and Power Sensing card used for branch‑circuit distribution in Mark VI systems.

Q: What is the fuse rating? A: Each fuse is rated 3.15 A, 500 VAC / 400 VDC.

Q: Does this board report feedback to PPDA? A: No. Branch‑circuit feedback is local and not part of PPDA feedback channels.

Field Installation Guidelines

• Mount the board within the PDM assembly using designated standoffs.
• Verify fuse ratings before energizing cabinet loads.
• Route AC/DC wiring separately to minimize noise coupling.
• Ensure all terminal screws are torqued properly to avoid intermittent power paths.
• Inspect relay and sensing circuits for contamination before installation.
• Follow Mark VI grounding practices to prevent ground‑loop interference.