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The GE DS200STBAG1 (STBA) is an AC/DC Terminal Board or Basic Drive Terminal Board used in GE’s legacy Mark V Speedtronic Turbine Control Systems and high-performance Drive Systems (such as the DC2000 drives).
Its primary function is to serve as the main interface and connection point for input/output (I/O) signals, control logic, and various power supplies, bridging the gap between external field wiring and the internal drive control board.
Key Functions and Features
The DS200STBAG1 is a versatile board designed to manage a wide range of basic I/O functions and power distribution within the drive panel.
1. I/O Signal Interface
The board provides numerous screw-type terminals where field wiring is connected. These terminals allow the drive control board to communicate with external equipment and sensors.
- Configurable Control Inputs (CI): It typically features eight control inputs that can be configured via hardware jumpers to interface with discrete (digital) signals, often operating at $24 \text{ VDC}$. Jumpers allow customization for either positive or negative logic.
- Analog I/O: The board often includes channels for both high-resolution analog input to the drive control board and analog output (e.g., $\pm 10 \text{ VDC}$) for external devices.
2. Power Distribution
The STBA board distributes essential regulated and unregulated power supplies to various components within the drive system.
| Power Output Type | Typical Voltage & Current | Purpose |
| Regulated DC | $+5 \text{ VDC}$ and $\pm 15 \text{ VDC}$ | Power for sensitive control logic and analog circuits. |
| Unregulated DC | $\pm 24 \text{ VDC}$ | Power for relays and other lower-power field devices. |
| AC Power | $120 \text{ VAC}$ | Used for certain relay control inputs or factory testing. |
3. Relay Control
The board typically incorporates seven relays that allow the control system to actuate external components such as solenoid valves, contactors, and indicating lights. These relays often have contact ratings like $120 \text{ V} / 0.5 \text{ A}$. The control of these relays can be configured using hardware jumpers to accept internal $24 \text{ VDC}$ signals or external $115 \text{ VAC}$ inputs.
4. Communication and Configuration
The DS200STBAG1 is an important interface for commissioning and diagnostics. It is often equipped with an RS-232C serial port (COMPL connector), which allows technicians to connect configuration software (like the ST2000 Toolkit) from a laptop for programming, real-time monitoring, and troubleshooting of the drive system.
Application and Context
The GE DS200STBAG1 is a foundational board for systems that require reliable and basic I/O connectivity, serving as a versatile alternative to more specialized terminal boards within the Mark V system when only essential control functions are needed.
- GE Mark V Speedtronic: Used in turbine control panels to manage basic signal and power requirements for turbine peripherals and control logic.
- DC2000/DC300 Drives: Used in industrial drive systems to provide the necessary connection points for control signals and auxiliary power to ensure the precise and reliable operation of large DC motors.
