GE IS200ERAXH1A – Excitation Regulator Auxiliary Board for EX2100 / Mark VI Systems

The GE IS200ERAXH1A (often referenced as the ERAX board) is an auxiliary regulator board used in GE excitation and turbine control platforms—typically EX2100 and, in many cases, Mark VI-based installations. From my experience, teams choose ERAX when they need stable auxiliary I/O and conditioning around the regulator, without changing the core control. You might notice that it’s designed as a plug-in IS200 series card, so swap-outs are fast and field-friendly.

Order Placement Process and Guarantees

• Warranty: 365 days
• Lead time: 1 week if in stock; no more than one month at the latest
• Payment: 50% advance payment; full payment prior to delivery
• Express options: FedEx, UPS, DHL

One thing I appreciate is the predictability: most replacements ship quickly, and installation usually takes less than an hour if the rack is prepared and tagged properly.

Key Features

• Auxiliary regulator functions for EX2100/Mark VI
  – Provides supporting I/O and conditioning around the exciter regulator loop, helping stabilize protection and command paths.
• Backplane integration
  – Communicates via the system backplane; no external fieldbus setup required for the board itself.
• Mixed I/O support
  – Typically handles opto‑isolated digital inputs, relay/contact outputs, and analog sense lines used by the excitation regulator.
• Fast field replacement
  – IS200 plug‑in design with keyed connectors reduces handling risk and speeds up mean time to repair.
• Diagnostic visibility
  – Board‑level status indicators (where fitted) allow a quick health check during commissioning or fault tracing.
• Robust construction
  – Industrial PCB build suitable for cabinet environments; typically used with standard GE control racks and terminal boards.
• Stable revision H1A
  – The H1A hardware iteration is widely deployed; it appears to be favored for like‑for‑like replacement in legacy fleets.

A power plant maintenance lead told us their unit cleared nuisance regulator alarms after replacing a tired ERAX with this H1A version—no application code changes, just a clean swap and basic checks.

Technical Specifications

Related or Supporting Products

• GE IS200EDEXH1A – De‑Excitation Board
  — handles field discharge and crowbar control in EX2100 systems; often paired with ERAX in the same rack.
• GE IS200EPCTG1A – Power Converter Control Board
  — supervises converter gating and feedback; used where the excitation bridge is controlled from the rack.
• GE IS200EISBH1A – ISBus/Interface Board
  — provides high‑speed internal communications in certain EX2100/Mark VI configurations.
• Revision alternatives
  — If your site BOM specifies ERAX with a different suffix (e.g., H1x), the functional role is similar but component or layout changes may exist; we typically confirm interchangeability against your serial/BOM.

If you’re replacing a failed ERAX, it helps to share the rack part list and any connected terminal board IDs; it seems to prevent mismatches in mixed‑revision cabinets.

Installation & Maintenance

• Environment
  – Install in a closed control cabinet per GE guidelines; maintain ventilation and avoid conductive dust. Keep RH non‑condensing.
• Handling & ESD
  – Use antistatic wrist straps and bags; handle by edges. De‑energize the rack and tag out before insertion or removal.
• Wiring
  – Verify terminal board/harness part numbers and labeling. Tighten field terminals to the specified torque and route away from high‑noise power cables where possible.
• Commissioning
  – After installation, run self‑tests and check status LEDs (if present). Confirm discrete I/O and analog sense channels in the HMI tool.
• Routine care
  – Inspect connectors quarterly, re‑seat if needed, and clean light dust with dry, oil‑free air. Firmware is controller‑resident; board itself typically requires no updates.
• Spares strategy
  – In most cases, sites keep one ERAX spare per exciter line‑up; that seems to minimize downtime when a trip forces a swap.

Quality & Certifications

• Manufactured under ISO 9001 quality systems (typical for GE industrial controls)
• UL/CSA recognition usually applies at the assembly/system level for the control cabinet
• CE marking is system‑level; the board is supplied as a component
• 365‑day warranty as stated above

If you share your current rack ID and BOM snapshot, we’ll verify ERAX H1A fit against your configuration before shipping—saves surprises during outage windows.