IS200ESELH2RRR GE Mark VI System Exciter Selector Board
Manufacturer: GE Fanuc
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Part Number: IS200ESELH2RRR
Condition：New with Original Package
Product Type: Exciter Selector Boards
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Country of Origin: USA
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
GE IS200ESELH2RRR Mark VI System Exciter Selector Board
The GE IS200ESELH2RRR, also cataloged as the ESELH2A Exciter Selector Board, operates as a dedicated hardware component for signal routing and excitation feedback switching within GE Mark VI turbine control platforms. It directs real-time control signals between central system processors and field excitation circuits while providing signal conditioning across active channels. Powered by a 24 VDC supply, the unit coordinates analog feedback loops, routes digital commands via Ethernet, RS232, and RS485 physical interfaces, and executes switching routines inside VME-based rack assemblies.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | IS200ESELH2RRR (Revision / Alternate: ESELH2A) |
| Brand | GE |
| Origin | USA |
| Weight | 1.2 kg |
| Dimensions | 100 mm x 150 mm x 200 mm |
| Operating Temp | -40 deg C to +70 deg C |
| Power Consumption | 24 VDC nominal supply input |
| System Compatibility | GE Speedtronic Mark VI Control System |
| Primary Function | Routes excitation control signals and field feedback loops |
| Communication Interfaces | Ethernet, RS232, RS485 |
| Assembly Architecture | Panel-mounted / VME rack integration |
Backplane Bus Communication Velocity & Signal Processing
The IS200ESELH2RRR integrates directly into the Mark VI rack framework to sustain high backplane bus communication velocity across triple-redundant logic channels. The board conditions raw field transducer inputs and manages signal switching pathways without introducing frame latency. Hardware-level diagnostic buffers maintain firmware flash compatibility across Mark VI system revisions, ensuring deterministic execution of excitation commands while optimizing system I/O density scaling inside control enclosures.
Frequently Asked Questions
Q: How does the IS200ESELH2RRR maintain signal integrity across its communication ports during high electromagnetic interference events?
A: The board utilizes differential transceivers for RS485 lines and galvanically isolated physical layer interfaces on Ethernet circuits. Onboard noise filtering suppresses high-frequency transients and common-mode noise generated by switching field exciters.
Q: Can the IS200ESELH2RRR board be replaced while the host Mark VI control panel remains powered?
A: Field technicians must fully de-energize the 24 VDC power supply and isolate field connections before removing the board. Swapping the board while energized risks interrupting active excitation feedback loops and triggering an immediate turbine-generator trip.
Field Installation Guidelines
Mount the IS200ESELH2RRR securely into the designated panel slot or VME frame location using standard retaining hardware. Route incoming 24 VDC power through short, dedicated conductors, ensuring correct supply polarity before energizing the board. Connect all Ethernet, RS232, and RS485 communication cables using high-grade shielded twisted-pair (STP) wiring. Terminate cable shields directly to the cabinet chassis ground bar at a single entry point to prevent ground loops. Maintain a minimum 50 mm clearance around the module chassis to facilitate passive airflow across component surfaces inside the cabinet.