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Key Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | General Electric (GE Industrial Systems) |
| Product Type | DC Feedback Card (Exciter) |
| Series Compatibility | EX2100 Digital Excitation Control System |
| Primary Measurement | Field Voltage and Field Current (SCR Bridge) |
| Isolation Method | Fiber optic link (via EISB board) |
| Connectors | Two plug connectors (P2 input) |
| On-board Components | 6 ICs, 2 Relays, Heat Sinks, Capacitors |
| Configuration | 7-position bridge voltage reduction selector |
| Origin | United States |
Product Introduction
The GE IS200EDCFG1B is a specialized DC feedback card designed for the Mark VI and EX2100 excitation control systems. Its primary responsibility is managing the feedback loop for the static excitation system. Specifically, it measures the DC voltage and current at the SCR (Silicon Controlled Rectifier) bridge. This data is critical for the regulator to maintain precise generator field current.Unlike standard I/O boards, this unit handles high-power monitoring tasks directly. It provides electrical isolation between the high-voltage power circuit and the low-voltage control logic using fiber optic links connected to the EISB board. The board features heavy-duty components, including large electrolytic capacitors and heat sinks, to withstand the thermal and electrical stress of continuous excitation monitoring.
Installation & Configuration Guide
Phase 1: Preparation (Safety First)
DANGER: High Voltage. The EX2100 system deals with lethal voltages. Ensure the excitation system is de-energized and locked out/tagged out (LOTO) before touching any terminals.
- Verify Part Number: Check the label on the replacement card. Ensure it matches
IS200EDCFG1B. - Inspect Hardware: Look for damaged pins on the P2 connector or cracked heat sinks.
- Tools Required: ESD wrist strap, flathead screwdriver (for selectors), mounting screws.
Phase 2: Removal (If replacing)
- Disconnect Cables: Unplug the two main plug connectors from the face of the board. Note their positions (P2 vs others).
- Unmount: Remove the mounting screws securing the board to the chassis or backplane.
- Extract: Slide the card out carefully. Do not touch the gold contact fingers.
Phase 3: Installation
- Insert Card: Slide the IS200EDCFG1B into the designated slot in the exciter control cubicle.
- Secure: Tighten the mounting screws to ensure good grounding and mechanical stability.
- Reconnect: Plug the cables back into the corresponding sockets. Ensure they click/lock into place.
Phase 4: Configuration & Power-On
- Check Jumpers: Verify the “Bridge Voltage Reduction Selector” settings match the old board or system manual requirements. Do not guess these settings.
- Power Up: Restore control power.
- Verification: Check the HMI or local display for valid field voltage/current readings. If readings are zero or pegged, re-check connections.
Troubleshooting Quick Reference
| Symptom | Probable Cause | Corrective Action |
|---|---|---|
| No Field Voltage Reading | Blown fuse or loose P2 connector | Check continuity of input fuses; reseat the P2 connector firmly. |
| Erratic Feedback Signal | Noise interference or bad ground | Verify ground continuity; check fiber optic cables for damage. |
| Board Overheating | Failed cooling fan or internal short | Inspect heatsink temperature; smell for burnt components (resistors/caps). |
| Regulator Fault Alarm | Mismatched calibration | Verify the voltage reduction selector switch position (1-7). |
Dimensions, Mounting & Wiring Notes
- Form Factor: Standard industrial PCB form factor compatible with EX2100 racks.
- Mounting: Typically mounts vertically onto a sub-rack or backplane.
- Wiring: Uses plug-in terminal blocks. No direct screw-terminal wiring on the board itself—wiring is done to the plugs, which are then inserted into the board.
- Clearance: Allow at least 1 inch of clearance above the board for airflow over the heat sinks.
FAQ
What is the difference between IS200EDCFG1A and IS200EDCFG1B?
The “B” version usually indicates a revision update. While often physically interchangeable, the internal component values or firmware logic might differ slightly. Always verify the jumper settings when swapping A for B.Can I use this board for a turbine control application?
No. Despite the similar “IS200” prefix, this board is specific to the EX2100 Excitation System. Turbine controls (Mark V/VI) use different I/O cards (like the TCQA). Do not mix them up.Why does my board have large heat sinks?
This board processes high-voltage DC feedback. The resistors and transistors handling this signal dissipate significant heat, requiring the metal heat sinks to prevent thermal failure.I see relays on the board. What do they do?
The two on-board relays are typically used for protection logic or signal routing within the feedback loop, ensuring the controller receives the correct signal state during operation or faults.Is this item sold as new or used?
Unless specified as “Factory Sealed,” most available stock for this legacy part is Used Surplus or Refurbished/Tested. We verify functionality via our test rack before shipping.
