Description
Product Overview
The GE IS200EAUXH1AAA (also referenced as IS200EAUXH1A) is the EAUX auxiliary function printed circuit board for GE EX2100e generator excitation control system under Mark VIe / Mark VIeS Speedtronic platform. It serves as the auxiliary signal interface board in TMR (Triple Modular Redundant) excitation racks, handling discrete relay outputs, auxiliary analog/digital interlock signals, status feedback and excitation system auxiliary logic between the EX2100e main controller, power bridge and field devices. The board is equipped with onboard relays and hardware jumper configuration points for custom excitation interlock setup, synchronizing auxiliary functions with the core excitation regulation loop.
Technical Specifications
| Item | Parameter |
|---|---|
| Part Number | IS200EAUXH1AAA |
| Manufacturer | GE General Electric |
| Platform | Mark VIe / EX2100e Excitation System |
| Board Type | EAUX TMR Auxiliary Function Board |
| Onboard Hardware | 7 built-in relays, 8 configurable jumpers |
| Power Supply | Backplane supplied 5VDC + 24VDC control power |
| Operating Temp | 0 °C ~ +60 °C (derate above 45°C) |
| Humidity | 5%–95% non-condensing |
| Architecture | TMR compatible for redundant excitation cabinet |
| Mounting | Plug-in card for EX2100e rack backplane |
| Enclosure | PCB assembly for cabinet installation, IP20 |
| Weight | ~1.81 kg |
| Diagnostics | Front status LEDs, board-level self-test, fault reporting to ControlST |
Key Features
- Dedicated auxiliary signal interface for EX2100e generator excitation control racks
- 7 integrated relays for excitation alarm, trip and auxiliary discrete switching tasks
- 8 hardware jumpers to configure onboard logic and signal routing without firmware modification
- TMR design compatibility, matches triple redundant EX2100e excitation control architecture
- Galvanic isolation between low-level control signals and relay field circuits to reduce EMI
- Continuous self-diagnostics with LED health indicators for quick on-site troubleshooting
- Synchronizes auxiliary interlock, status feedback and permissive signals to the main excitation regulator
- Standard plug-in form factor for simple rack replacement in power plant excitation cabinets
Application
Primarily used in EX2100e static excitation panels for large synchronous generators in combined cycle, thermal and hydro power plants. It manages auxiliary excitation permissives, field breaker status, alarm relay outputs and interlock signals required for generator field control, working together with other EX2100e control and firing boards.
Installation & Maintenance Notes
- ESD protection is mandatory during card removal and insertion
- Isolate excitation high-power circuits and lock out power before servicing the rack
- Record jumper positions before removing the board; misconfigured jumpers cause excitation trip faults
- Verify backplane power and bus connections after replacement
- Perform excitation permissive and relay loop testing after card swap
- Save EX2100e configuration database before board replacement
FAQ
Q: What does EAUX stand for? A: EAUX = Excitation Auxiliary function board for EX2100e excitation control system.
Q: What is the difference between IS200EAUXH1A and IS200EAUXH1AAA? A: IS200EAUXH1AAA is the full part variant of IS200EAUXH1A; hardware circuit function is identical, the suffix AAA denotes factory configuration variant.
Q: Can this board operate independently without EX2100e controller? A: No, it is a dedicated auxiliary board and must be installed inside EX2100e excitation rack paired with Mark VIe main control hardware.
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