The GE IS200WROBH1AAA, also cataloged as the IS200WROB Power Distribution Board, operates as a dedicated hardware component for relay fusion protection and voltage detection within GE Mark VI Speedtronic control system platforms. The board accepts primary branch power inputs and routes circuit protection through twelve onboard fuses rated at 3.15 A (500 VAC / 400 VDC) to maintain physical electrical isolation across cabinet distribution loops.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | IS200WROBH1AAA (IS200WROB) |
| Brand | GE (General Electric) |
| Origin | USA |
| Operating Temp | -30 to 65 deg C |
| Power Consumption | System Backplane Bus Powered |
| Board Type | Power Distribution Board (Relay Fuse & Power Sensing) |
| Fuse Count | 12 Onboard Fuses |
| Fuse Electrical Rating | 3.15 A (500 VAC / 400 VDC) |
| Redundancy Architecture | Simplex, Dual, and Triple Modular Redundancy (TMR) Support |
| Series Compatibility | Mark VI Speedtronic Control Platform |
Backplane Bus Communication Velocity and System Redundancy
The IS200WROBH1AAA integrates within the Mark VI Power Distribution Module (PDM) architecture, interfacing with high-speed backplane bus communication velocity networks across Simplex, Dual, and Triple Modular Redundancy (TMR) system layouts. Designed for scaled I/O density scaling, the board isolates specific branch circuits within the cabinet enclosure while providing real-time power sensing feedback without relying on external PPDA I/O pack feedback loops. Firmware flash compatibility across upstream Mark VI controllers enables dynamic diagnostic synchronization and fault voting state execution.
Frequently Asked Questions
Q: What are the voltage and current ratings for the onboard fuses on the IS200WROBH1AAA card?
A: The card contains twelve individual branch circuit fuses, each explicitly rated for a maximum continuous current of 3.15 A at 500 VAC or 400 VDC.
Q: How does the IS200WROBH1AAA support TMR (Triple Modular Redundancy) configurations?
A: The board routes branch power and sensing outputs across fanned TMR networks, allowing three independent controllers to conduct state voting and continuous power diagnostics for fault isolation.
Q: Is system de-energization required before replacing individual blown fuses on the board?
A: Yes, main cabinet power must be isolated and verified de-energized before removing or inserting fuses to prevent electrical arcing and operator injury.
Field Installation Guidelines
- Disconnect primary incoming AC and DC power supplies from the Mark VI cabinet prior to board installation or fuse servicing.
- Wear a grounded ESD wrist strap connected to the metal enclosure frame to prevent static damage to sensing trace circuitry.
- Align the IS200WROBH1AAA board with the rack mounting rails and insert it straight into the backplane sub-assembly until fully seated.
- Torque mounting panel retention screws to 0.8 Nm (7 in-lbs) to maintain grounding continuity and structural stability against cabinet vibration.
- Verify that all 3.15 A fuses (rated 500 VAC / 400 VDC) are fully seated in their respective holders before reapplying distribution bus power.
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