Product Summary
The IS200WROBH1A is a WROB Relay Fuse and Power Sensing Board from the GE Mark VIe series. This option board integrates with the PDIO Discrete Input/Output Module. It provides sensed, fused power to relay outputs and monitors fuse status. The board supports TMR, redundant, and simplex modes for critical applications.
Theme A: Product Procurement & Buyer Guide
Understanding the IS200WROBH1A Board Function
The IS200WROBH1A serves as a flexible option board for the Mark VIe series. It attaches to TDBS, SRLY, or TDBT terminal boards. When connected to a TDBS board, it transforms the relay section. This configuration makes it equivalent to an IS20TRLYH1B board. It then delivers fused power to the first six relay outputs. It also supplies dedicated power to the final relay outputs.
Key Technical Specifications for Buyers
Procurement managers must verify the board’s default fuse value. The IS200WROBH1A uses a 3.15 A fuse for circuit protection. You should reference the manual GEH-6721L for detailed setup procedures. The board works with TDBTH2, TDBTH4, and TDBTH6 terminal boards in TMR mode. This compatibility ensures seamless integration into existing Mark VIe cabinets.
Redundancy Modes and System Compatibility
This board supports simplex, redundant, and Triple Modular Redundant (TMR) configurations. In TMR applications, the IS200WROBH1A mounts on the TDBT board. It then functions like a terminal board combined with a contact input board (TBCI). This dual role reduces the need for extra hardware. It simplifies your overall system architecture and lowers procurement costs.
Solving Industrial Pain Points for Engineers
Application engineers need reliable power distribution for discrete outputs. The IS200WROBH1A solves this by sensing and fusing power directly. It detects the status of all six fuse pairings when used with isolated voltage on the TDBS. This real-time fuse monitoring prevents unexpected downtime. It allows for proactive maintenance before a critical failure occurs.
Making the Right Selection for Your System
You must match the board to your specific I/O pack redundancy needs. The IS200WROBH1A works with both TMR and Simplex I/O packs. Always confirm your terminal board type before ordering. The board attaches to TDBS, SRLY, or TDBT boards. This flexibility makes it a versatile choice for various Mark VIe configurations.
Theme D: Expert Technical Evaluation & Performance Review
Board Architecture and Functional Role
The IS200WROBH1A is a WROB Relay Fuse and Power Sensing Board. It is an integral part of the Mark VIe PDIO module. The board acts as an intermediary between the relay outputs and the terminal base. It provides a critical layer of power distribution and fault detection. This design enhances the overall reliability of the control system.
Fuse Value and Power Distribution Analysis
The default fuse value is set at 3.15 amperes for standard operation. This fuse protects the first six relay output channels from overcurrent. The board also provides dedicated power paths to the final relay outputs. This separation ensures that critical final outputs remain stable. It prevents a single fuse blow from taking down the entire relay bank.
Signal Sensing and Diagnostic Capabilities
When the IS200WROBH1A connects to the TDBS with isolated voltage, it performs a key diagnostic role. It actively detects the status of each of the six fuse pairings. This sensing capability provides immediate feedback to the control system. Operators can see exactly which fuse has failed. This granular diagnostic data speeds up troubleshooting and repair times.
Performance in High-Availability Environments
The board excels in TMR and redundant system architectures. In TMR mode, it mounts on the TDBT board and mimics a TBCI board. This functionality adds contact input capabilities without a separate module. The IS200WROBH1A ensures high availability by supporting multiple redundancy schemes. It is an ideal choice for critical turbine and generator control applications.
Engineering Verdict on Reliability
The IS200WROBH1A offers a robust solution for power sensing and fuse management. Its design directly addresses the need for fused, monitored power in discrete I/O systems. The board’s ability to function across simplex, redundant, and TMR modes is a key strength. For engineers seeking a reliable Mark VIe option board, this model delivers proven performance.
Logistics & Standard Packaging Details
- One (1) GE IS200WROBH1A WROB Relay Fuse and Power Sensing Board
- Standard anti-static packaging for safe transit
- Product documentation and reference manual GEH-6721L (if available)
- Express shipping is available via FedEx, UPS, and DHL for fast delivery
