GE 151X1207CK01SA01 IS200EDEXG1A EX2100 SCR
Product Introduction / Overview
The GE 151X1207CK01SA01 assembly, featuring the primary IS200EDEXG1A Exciter De-Excitation Board (EDEX), is an industrial-grade excitation control and bridge protection module engineered for General Electric EX2100 digital excitation control systems. Designed specifically for silicon-controlled rectifier (SCR) de-excitation applications (Group 1 classification), this module manages the fast, controlled discharge of generator field energy during planned shutdowns, fault trips, or sudden loss of grid synchronization.
Equipped with onboard voltage-retention circuitry and Hall Effect conduction sensors, the IS200EDEXG1A board delivers critical SCR firing triggers even during station auxiliary power outages, securing generator field protection and preventing overvoltage events.
Technical Table
Parameter Specification Details
Assembly Part Number 151X1207CK01SA01
Main Board Model IS200EDEXG1A (EDEX Group 1)
System Architecture GE EX2100 Excitation Control System
Primary Function Generator Exciter De-Excitation & SCR Firing Control
Input Operating Voltage 24 V DC (Supplied via ESPM module)
Gate Drive Output Internal conversion to +125 V DC firing drive
Conduction Sensing Integrated Hall Effect sensors
Hardware Configability Jumpers JP1 through JP6
Board Revision & Coating Revision A / Standard Industrial Conformal Coating
Environmental Tolerance Conditions
Operating Temperature: -40°C to +85°C (-40°F to +185°F)
Operating Relative Humidity: 5% to 95% RH (Non-condensing)
Vibration & Shock: Meets IEC standards for industrial control cabinet and generator enclosure installation.
Atmospheric Protection: Conformal coating guards onboard trace electronics against airborne dust, industrial gases, and minor humidity ingress.
Operating Instructions
Initialization: Ensure power from the 24V DC ESPM unit is energized; verify board status LEDs indicate operational power without hardware fault flags.
De-Excitation Sequence: The EDEX board receives control signals via the EXTB board to trigger the SCR firing circuit. In the event of control network loss, onboard logic independently monitors anode-to-cathode voltage to trigger de-excitation safety sequences automatically.
Conduction Feedback: Monitor real-time field discharge current via feedback channels from the onboard Hall Effect sensors.
Fault Diagnosis
| Symptom / Fault | Possible Cause | Corrective Diagnostic Action |
| Loss of SCR Firing Signal | Incorrect jumper alignment or power loss from ESPM module. | Inspect 24V DC supply rails; verify positions of hardware jumpers JP1 through JP6. |
| Conduction Sensing Error | Hall Effect sensor degradation or loose J1/EPL cable connection. | Inspect physical connector seating at terminal headers; test sensor loop feedback. |
| Failure to Fire During Power Loss | Onboard energy-storage capacitor failure. | Check 35V / 1800uF drum electrolytic capacitors for bulging, leakage, or capacitance drop. |
Symptom / Fault Possible Cause Corrective Diagnostic Action
Loss of SCR Firing Signal Incorrect jumper alignment or power loss from ESPM module. Inspect 24V DC supply rails; verify positions of hardware jumpers JP1 through JP6.
Conduction Sensing Error Hall Effect sensor degradation or loose J1/EPL cable connection. Inspect physical connector seating at terminal headers; test sensor loop feedback.
Failure to Fire During Power Loss Onboard energy-storage capacitor failure. Check 35V / 1800uF drum electrolytic capacitors for bulging, leakage, or capacitance drop.
Related Models of the Same Series
IS200EDEXG2A: De-excitation board variant optimized for Diode de-excitation systems.
IS200AVSCG1A: EX2100 SCR Source Rectifier Control Board.
IS200EXTBH1A: EX2100 De-Excitation Terminal Board interface module.
IS200EXAMH1A: EX2100 Exciter Attenuator Module.
Storage Conditions
Storage Temperature: -55°C to +90°C (-67°F to +194°F)
Storage Environment: Clean, dry, humidity-controlled environment (5% to 95% non-condensing).
ESD & Packaging: Keep the assembly inside antistatic protective packaging until installed; handle using grounded ESD wrist straps.
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GE 151X1207CK01SA01 IS200EDEXG1A EX2100 SCR De-Excitation Board Assembly
The GE 151X1207CK01SA01 module, featuring the IS200EDEXG1A Exciter De-Excitation Board (EDEX Group 1), is an essential power electronic control unit designed for the General Electric EX2100 digital excitation control system. Engineed for precise SCR (Silicon Controlled Rectifier) de-excitation and bridge protection, this assembly manages the safe, rapid dissipation of energy from the generator field during routine shutdowns and emergency system trips.
Operating on 24V DC auxiliary power from the ESPM unit and outputting a +125V DC SCR firing drive, the IS200EDEXG1A incorporates onboard Hall Effect conduction sensors and energy-retention capacitors to ensure full de-excitation capability even during station power outages. Featuring six configurable hardware jumpers (JP1–JP6) and conformal coating for harsh environment resilience (-40°C to +85°C), the 151X1207CK01SA01 provides uninterrupted generator field protection, dynamic voltage safety, and seamless integration across industrial GE EX2100 excitation networks.