GE IS200WROBH1A / IS200WROBH1ABA Relay Fuse & Power Sensing Board – Mark VIe Turbine Control
The GE IS200WROBH1A and IS200WROBH1ABA are Relay Fuse and Power Sensing Boards designed for the GE Mark VI / Mark VIe turbine control system. These boards provide fused power distribution, relay output monitoring, and system protection for safety-critical turbine control applications in power generation and heavy industry.
Product Overview
The IS200WROBH1A series (WROB) board integrates into the PDIO discrete I/O architecture and distributes fused, monitored power to relay outputs. It enhances system reliability by monitoring fuse status and ensuring stable power delivery to relay circuits used in turbine control and protection.
This module is widely used in:
- Gas turbine control systems
- Steam turbine control systems
- Power plants and energy facilities
- Oil & gas and industrial automation environments
The IS200WROBH1ABA is a functional revision/variant of the IS200WROBH1A with the same core application and compatibility.
Key Features
- Relay fuse and power sensing board for GE Mark VIe systems
- Provides fused and monitored power to relay outputs
- Supports Simplex, Redundant, and TMR (Triple Modular Redundant) architectures
- Monitors fuse status to improve system safety and reliability
- Designed for harsh industrial environments
- Modular design for quick installation and replacement
The board ensures safe switching and real-time monitoring of relay circuits, reducing downtime and improving turbine operational safety.
Technical Specifications
| Parameter |
Specification |
| Manufacturer |
GE (General Electric) |
| Part Numbers |
IS200WROBH1A / IS200WROBH1ABA |
| Functional Acronym |
WROB |
| Series |
Mark VI / Mark VIe |
| Board Type |
Relay Fuse & Power Sensing Board |
| Fuse Rating |
3.15 A |
| Input Voltage |
24 VDC |
| Redundancy Modes |
Simplex / Redundant / TMR |
| Compatible Terminal Boards |
TDBS, SRLY, TDBT |
| TMR Compatibility |
TDBTH2 / TDBTH4 / TDBTH6 |
| Operating Temperature |
−40°C to +85°C |
The board provides fused and sensed power for the first six relay outputs and dedicated power for the remaining outputs.
Functions in Mark VIe System
1. Relay Output Power Distribution
The module distributes fused power to relay outputs, ensuring safe and stable switching of turbine control signals.
2. Fuse Monitoring & Protection
The board detects the status of multiple fuse pairs, allowing operators to identify faults quickly and maintain system uptime.
3. Integration with PDIO Modules
The WROB board works with TDBS, SRLY, and TDBT boards to provide relay interface and power sensing functionality within the PDIO module architecture.
4. Support for High-Reliability Architectures
Compatible with TMR systems, enabling high availability and fault-tolerant turbine control.
Typical Applications
- Power generation plants
- Gas and steam turbine control cabinets
- Industrial process automation
- Safety and protection interlocking systems
These boards are critical in environments where reliable relay control and power monitoring are required for continuous operation.

Main Brand:
First hand source, affordable price. Spot inventory!
•Shipping Port: Xiamen
•E-mail: sales5@xrjdcs.com
•Tel: +8618250705533(WhatsApp)
•Ship to you via Fedex/DHL/TNT/UPS/EMS
•Package: Original packing with cartons

OUR FASTER DELIVERY RATE
Customer support responds quickly.
Partner network spans the globe.
Customers in 152 countries.
No matter where the user is in the world, SAUL ELECTRIC is committed to keeping your machine up and running as soon as possible.
Our Main Brands
DCS/PLC/TSI Manufacturers:
ABB, GE, Allen Bradley, Honeywell, Emerson, Bently Nevada, Prosoft, Siemens, Westinghouse, Triconex, Foxboro, ICS Triplex, Hima, Schneider, Yokogawa, Woodward, B&R, KEBA, etc.
Product Categories & Models
1. Distributed Control System (DCS)
- ABB: 3AUA0000110429, SYSCON2 746924
- Invensys Foxboro: FBM214, FBM242, B0123HE
- Invensys Triconex: 3625, 3700A, 3604E
- Woodward: 5462-758B
- HIMA: F2-DO-16-02, F8650E
- Yokogawa: SAI143-S03 S1, F9342L-02
- Honeywell: 51402497-200, 51403519-160, 51199194-100, CC-PDO801
- Emerson: KJ4001X1-NB1, 12P3368X012
2. Programmable Logic Controller (PLC)
- Rockwell/Allen Bradley: 1734-IB8, 1734-OB8, 1769-L18ER-BB1B, 1756-IM16I
- ICS Triplex: T8461, T8850, T8403, T8431, T8831, T8310
- Schneider Modicon: 140DDI85300
- GE Fanuc: IS210AEPSG2B, IS220UCSAH1A, IS215ACLEH1A, IS210AEAAH1B
- Siemens: 6ES7331-1KF02-0AB0
- Prosoft: MVI46-DFNT
- Bachmann: MPC240
- Woodhead: 9905-068 2301A
3. Turbine Supervisory Instrumentation (TSI)
- Bently Nevada: 3500/22M, 138607-01, 3500/25, 3500/53, 3500/32M 149986-02
- EPRO: MMS6110, MMS6120, MMS6220, MMS6312, MMS6410, 6423, 6424
- ENTEK: EK C6622HS, XM124, 1440-SDM02-01RA

There are no reviews yet.