The GE DS2020EXPSG3, also cataloged as the DS2020EXPS Exciter Power Supply Board, operates as a dedicated hardware component for AC/DC power input measurement and battery inrush current limiting within GE EX2000 Excitation Control System networks.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | DS2020EXPSG3 |
| Brand | General Electric |
| Origin | United States |
| Series | EX2000 |
| Product Type | Exciter Power Supply Board |
| Dimensions | 33.0 cm x 17.8 cm |
| Operating Temp | 40 to 85 deg C |
| Weight | Standard GE EX2000 Board Weight |
| Power Consumption | Requires +5 VDC at 6 A backplane rail |
| Power Supply Voltage | 28 VDC |
| Input Voltage | 12 VDC |
| Number of Input Channels | 12 |
| Number of Outputs | 125 VDC output feed |
| Mounting Type | Chassis Mount |
| Manufacturing Technology | Surface mount technology (SMT) |
| Manual Reference | GEI-100168 |
Backplane Bus Communication Velocity & Firmware Flash Compatibility
The DS2020EXPSG3 processes power telemetry across 12 input channels to monitor incoming AC and DC operating rails while providing active current-limiting protection when energized directly from station battery banks. Catalog designation rules govern backplane interface compatibility: the base identifier DS2020EXPS designates the functional hardware group, while the Group number (G3) specifies the physical circuit variant. Within the functional revision framework, the first alphabetic revision character indicates functional architecture changes that eliminate backward compatibility, whereas subsequent revision characters represent downward-compatible hardware iterations.
Frequently Asked Questions
Q: What primary protection does the DS2020EXPSG3 provide when energized from a station battery?
A: The board executes integrated current-limiting action to restrict high inrush currents upon energization from the station battery supply.
Q: How is hardware compatibility determined across different EXPS revision levels?
A: Compatibility is defined by the alphanumeric catalog suffix: a change in the first revision character denotes a non-backward-compatible functional update, while subsequent characters indicate downward-compatible revisions.
Q: What are the primary input rail power requirements for board operation?
A: The board requires an internal logic power supply of +5 VDC rated at 6 A, alongside a 28 VDC power supply voltage and a 12 VDC input rail.
Field Installation Guidelines
- Isolate all 125 VDC output circuits, station battery feeds, and internal power rails prior to removing or installing the chassis-mounted board.
- Wear a grounded ESD wrist strap bonded to the cabinet chassis frame to protect surface-mount components from electrostatic discharge.
- Confirm chassis mounting hardware is securely fastened to ensure proper thermal dissipation and structural grounding across the assembly.
- Verify connector engagement and wire harness orientation against manual GEI-100168 before re-energizing the excitation control system.
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