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The GE DS200SHCAG1BAA is a specific revision of the Shunt Connector Board (SHCA) used in the GE Mark V Speedtronic Turbine Control System and DS200 Drive Series.1
Its fundamental role is to function as a passive, reliable interface for signal integrity.2 It provides a dedicated, structured connection point for routing low-voltage, highly accurate current feedback signals from the drive’s current shunts to the main electronic control and instrumentation boards.
Key Function and Purpose
The DS200SHCAG1BAA is essentially a high-integrity termination board. It does not perform any control, processing, or power regulation; its design is centered on signal conditioning and routing.
- Current Measurement Interface: In high-power DC systems, current shunts measure large currents (Armature, Field) by dropping a tiny, proportional voltage (typically in the millivolt range).3 This low-voltage signal is easily corrupted by electrical noise.
- Signal Termination: The board provides robust, secure terminal points for the wiring that carries this sensitive $\text{mV}$ shunt voltage.
- Signal Routing to Control: It acts as the bridge that passes the conditioned shunt signal to the main Instrumentation Board (SDCI or DCFB), which then amplifies, isolates, and digitizes the signal for the main drive control processor (SDCC).
- Insulation and Protection: The board is typically coated with a Normal PCB Coating for basic protection against environmental factors like moisture and dust, which is necessary to maintain signal integrity in harsh industrial cabinets.4
Part Number Breakdown (DS200SHCAG1BAA)
The full part number indicates its specific revision history:
| Segment | Code | Meaning |
| DS200 | DS200 | GE’s Mark V DS200 Series (Circuit board assembly) |
| SHCA | SHCA | Shunt Connector Assembly |
| G1 | G1 | Group 1: The primary functional grouping for this component type. |
| B | B | Functional Revision 1 |
| A | A | Functional Revision 2 (often indicates a minor circuit or component update) |
| A | A | Artwork Revision (indicates a specific version of the physical PCB layout) |
The DS200SHCAG1BAA is a commonly referenced revision that ensures the high-accuracy current feedback necessary for safe, efficient motor control is delivered reliably to the digital control system.
