IS200EDCFG1A 4 IS200EDCFG1A 2 IS200EDCFG1A 5 IS200EDCFG1A 3

The GE IS200EDCFG1A is an Exciter DC Feedback Board purpose-built for GE’s EX2100 Excitation Control Systems and related Mark VI turbine automation platforms. This board plays a vital role in measuring field current and field voltage directly at the SCR bridge — feeding scaled feedback signals into the excitation control logic. These signals are essential for precise excitation regulation and stable generator performance in power generation and industrial turbine applications.

Technical Specifications

Parameter	Specification
Model	IS200EDCFG1A
Module Type	Exciter DC Feedback Board
Series/Platform	GE EX2100 / Mark VI
Function	Monitors DC field current & voltage at SCR bridge
Power Supply	±24 V DC external
Integrated Voltages	+15 V, –15 V, +5 V DC (via onboard regulators)
Communication Interface	Dual fiber-optic feedback links to EISB board
Fiber Options	Plastic fiber (≤10 m), Hard-clad silica fiber (≤90 m)
Feedback Signals	Field voltage & field current scaled and conditioned
Indicator LEDs	1 × Power status (PSOK) LED
Operating Temperature	–30 °C to +65 °C (typical industrial)
Dimensions	Approx. 122 × 82 × 60 mm (varies by revision)
Weight	~0.5 kg – 1.2 lbs
Manual	GEI-100464 / GEH-6632 EX2100 Excitation Control Guide

The IS200EDCFG1A couples with the EISB (Exciter IS-Bus Interface) board and relies on high-speed fiber communication for robust voltage isolation and noise-immune signal transmission.

Recommended Related Modules

To complete a precision excitation control rack, pair this feedback board with these components:

IS200EISBH1A – Exciter IS-Bus Interface Board
IS200DSPXH1D – Digital Signal Processor Board
IS200ACLEH1A / H1B – Application Control Layer Modules
IS200EACFG2A / IS200EACFG3A – AC Feedback Boards

These modules work together to provide full excitation control, signal acquisition, processing, and feedback for turbines and generators.

Popular GE EX2100 / Mark VI Boards

IS200ECTBG1A – Current Transformer Bridge Board
IS200DRLYH1B – Relay Output Terminal Board
IS200BICIH1A – Bridge Interface Controller
IS200EHPAG1A – Gate Pulse Amplifier
IS200ERIOH1A – I/O Regulator Board

All are widely used in industrial turbine control and power generation systems.

Applications

The IS200EDCFG1A excels in industrial environments where precise DC feedback is crucial:

Generator excitation systems in power plants
Turbine speed and voltage regulation
SCR bridge current & voltage feedback measurement
High-reliability automation controls
Distributed excitation feedback networks

Its role is to ensure stable operational feedback that feeds real-time control loops for optimal system performance.

Advantages

Accurate DC Feedback Acquisition
Measures both field current and field voltage at the SCR bridge with reliable scaling for control logic.

Fiber-Optic Isolation
Dual fiber-optic links to the EISB board provide excellent noise immunity and electrical isolation.

Robust Industrial Design
Engineered for –30 °C to +65 °C environments typical of turbine and power generation cabinets.

Modular Rack Integration
Fits within the EX2100/Mark VI rack architecture and interfaces seamlessly with downstream processing modules.

Status Diagnostics
Front-panel LED indicates power status, simplifying system checks.

Technical FAQs

What feedback does this board provide?
It supplies field current and field voltage feedback from the SCR bridge to the control logic.
How does it communicate with the controller?
Via two fiber-optic channels to the EISB board, isolating voltage and reducing noise.
What voltage input does it expect?
Powered by an external ±24 V DC supply.
Can it handle long cable runs?
Yes — use hard-clad silica fiber for distances up to ~90 m.
Does it support isolated measurement?
Yes — fiber optics provide voltage isolation between boards.
What is the power supply status indicator?
A PSOK LED shows when the onboard power is operating normally.
Where is field voltage measured?
Across the negative SCR bridge terminal and positive shunt terminal.
What signal levels are output?
Conditioned, scaled analog levels feed into differential amplifiers and VCO circuits.
Is this board backward compatible with older models?
This “A” revision is not backward compatible with prior revisions.
Why is DC feedback important?
It enables stable excitation control by informing the regulator of actual field conditions.