Description
Product Introduction
GE IS200WROBH1AAA is the WROB relay fuse and power sensing board in GE’s Mark VIe and Mark VI turbine control systems, serving as the SRLY Option Board-B that provides fused protection and power monitoring for relay outputs in the PDIO (Power Distribution I/O) architecture.automationdcs+1
This board hosts twelve 3.15 A fuses (500 V AC / 400 V DC), features conformal coating for harsh industrial environments, and supports Simplex, Redundant, and TMR configurations for high-availability turbine control applications.automationdcs+1
Frequently Asked Questions
Q: Can I hot-swap the IS200WROBH1AAA?
A: No. The WROB is an option board installed in the PDIO chassis; it is not designed for hot-swap insertion. You must de-energize the PDIO rack or isolate the affected power section before removal to avoid blowing fuses, damaging relay outputs, and to protect personnel from 24 V DC and 500 V AC circuits.automationdcs+1
Q: Is the IS200WROBH1AAA obsolete? Are there direct replacements?
A: Yes, the WROB board is effectively obsolete in new GE production. Direct replacements are other WROB variants (e.g., IS200WROBH1A, IS200WROBH1AAB) or upgraded PDIO option boards in the same Mark VI/VIe family, but verify mechanical envelope, fuse count, and connector pinout before swapping.topbrandsplc+1
Q: Will I lose my turbine control program when replacing this board?
A: No. The IS200WROBH1AAA is a fuse and power sensing option board; it does not store control logic or parameters. Turbine control programs reside in the primary controllers (e.g., VCMI, VCMIH). However, always back up the Mark VIe project before any hardware intervention.automationdcs+1
Q: Are these units factory-new or refurbished?
A: Most available stock is New Surplus (original GE packaging, never installed) or tested used units with 12–36 month warranty. Genuine GE factory-new IS200WROBH1AAA boards are rare. Request photos of packaging, revision labels (AAA/A/A), and serial numbers for audit.ebay+1
Q: What warranty and lead time should I expect?
A: Surplus suppliers typically offer 12–36 months warranty on tested units; New Surplus may have 12–24 months. Lead times: in-stock units ship in 1–3 days, but export paperwork and customs can add 5–8 working days.ebay+1
Q: What are the most common installation mistakes with this relay fuse board?
A: Using incorrect fuse ratings (must be 3.15 A, 500 V AC / 400 V DC Littelfuse 04773.15MXP), reversing 24 V DC polarity, overloading the fuse bus by adding too many relay outputs, and failing to verify the conformal coating integrity in humid environments. Also, ignoring the 0 °C to 70 °C operating range can cause thermal derating.automationdcs+1
