Description
- Model: IS200EPSMG2ADC (Matches base board series IS200EPSMG2A)
- Brand: General Electric (GE)
- Series: EX2100 / EX2100e Excitation Control & Mark VI/VIe Turbine Control Systems
- Core Function: Exciter Regulator Power Supply Module
- Condition: Brand New Surplus / Clean Tested Factory Stock
- Product Type: Printed Circuit Board Assembly (PCBA) / Power Supply Card
- Output Voltages: Multi-channel output producing +5 VDC, ±15 VDC, and +24 VDC for the control backplane, plus an isolated 70 VDC for system contact wetting.
- Internal Power Architecture: Features a high-efficiency buck regulator coupled with a push-pull inverter layout. The buck regulator steps down the raw DC link bus input down to an intermediate 50 VDC level, which the inverter balances into multiple isolated operational voltages.
- Redundancy Configuration:
- In Simplex systems, a single
IS200EPSMG2ADCboard handles full loading mounted onto the IS200ERBPH_A Exciter Regulator Backplane (ERBP). - In Redundant tracking setups, two matching modules are utilized side-by-side—one nested in the standard backplane (M1 slot) and the second populated inside the IS200ERRBH_A Redundant Backplane (M2/C slot tracking).
- In Simplex systems, a single
- Isolation Barrier: High-frequency push-pull inverter transformer topology guarantees solid electrical isolation, isolating volatile raw input lines from sensitive logic processors.
- Ancillary Power Outputs:
- ±24 VDC dedicated output routing to auxiliary cabinet cooling fans, de-excitation panels, and ground fault relay triggers.
- Isolated 20 VAC loop specifically engineered to drive active IGBT gate control assemblies.
- Physical Diagnostics: Features 7 front-panel status verification LEDs corresponding to individual rail states
GE IS200EPSMG2ADC
GE IS200EPSMG2ADC
GE IS200EPSMG2ADC
Frequently Asked Questions (FAQ)
Q1: What is the main difference between the EPSMG1 and EPSMG2 variants?
A: The application environments are distinct. The EPSMG1 converts a stable 125 VDC fed from a Power Distribution Module (PDM) to power the M1, M2, and C control processors. The EPSMG2 (IS200EPSMG2ADC) is engineered to tap directly into the higher-voltage DC link bus voltage profile of the EX2100 regulator control system. It incorporates an on-board daughterboard (EPSD) providing widened electrical creepage, extended clearance distances, and integrated input inline fusing to protect against sudden primary line shorts.
Q2: Are different trailing revision tags (like G2A vs G2ADC) interchangeable?
A: Yes. In GE’s component naming framework, IS200EPSMG2A represents the foundational functional revision of the design group. The final letters (DC) represent specific software, minor component variations, or specialized factory coatings that do not change form, fit, or function. A G2ADC serves as a direct drop-in replacement for any baseline G2A or G2Axx position in an EX2100 control bay.
Q3: What is the significance of the “Isolated 70 VDC” output line?
A: This voltage line is completely isolated from system digital grounds and is used exclusively for contact wetting. It charges external dry contact loops on terminal boards (like the EXTB or ECTB) to punch through surface oxidation or corrosion layers on active switches, ensuring reliable contact status readings.
Part Number Breakdown Indicator
To help your engineering team cross-reference stock configurations, here is the official breakdown code for this GE part number:
