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The GE DS200SDCIG1AFB is a DC Power Supply and Instrumentation Board manufactured by General Electric (GE), primarily used in their industrial control systems. It is part of the Drive Control (SDCI) series, designed to interface with DC2000 drives and is often associated with the Mark V Speedtronic turbine control system.
Key Functions and Features
This board performs two primary roles: providing various power supplies and managing critical instrumentation signals for motor control.
Power Supply Function
- Logic Power: The board provides the necessary power for the control logic circuits within the drive system.
- Multiple Outputs: It generates several regulated DC and AC power outputs, typically including:
- +5V DC (for digital logic)
- +15V DC
- -24V DC
- 115V AC
- Protection: The power supply outputs are protected by fuses, often with associated LED indicators to signal a blown fuse, which aids in troubleshooting.
Instrumentation and Control
- Drive Interface: It serves as a crucial interface board for the DC2000 drive system.
- Signal Monitoring: The board contains circuits to monitor various AC line and DC motor signals, which is vital for the drive’s control and protection functions. These signals typically include:
- Armature current and voltage
- Field current and voltage
- AC line currents and voltages
- Voltage magnitude and phase sequence
- Motor Field Control (G1 Version): The DS200SDCIG1AFB is a “G1” version, which typically includes the circuitry for internal 10A Non-Reversing, Non-Plugging (NRX) motor field control. This includes features like fused field outputs, a line reactor to filter current, and snubber circuits to protect against voltage spikes.
- Driver Circuits: It includes driver circuits, such as those for armature SCR (Silicon Controlled Rectifier) gating, which are essential for controlling the DC motor’s operation.
The board’s robust design and integrated functionality ensure stable power distribution and precise signal processing for reliable operation in demanding industrial applications, such as large DC motor control within turbine management systems.
