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The GE DS200SPCBG1A Multibridge Signal Process Board is a crucial interface and signal conditioning card used within the GE Mark V Speedtronic Turbine Control System and associated drive control applications.1
Its primary function is to manage and process critical feedback and communication signals in a multi-bridge drive environment.2
Key Functions
The DS200SPCBG1A performs two main roles in the drive control system: Signal Processing and High-Speed Communication.
- Signal Processing for Drive Control:
- Encoder Feedback: It processes encoder feedback signals from motor encoders, which are used to determine motor speed and position.3 It converts the differential signals (typically from 5V or 15V) into up/down and marker pulse output signals for use by the main drive control board (DSPC/SDCC).4
- Analog Process Control: It conditions and converts analog process control input signals (e.g., 1–5 mA, 4–20 mA, 10–50 mA, or 2–30 V) into a standardized voltage range (typically 5$\pm 5\text{ V}$ or 6$\pm 15\text{ V}$) that the drive control board can utilize.7
- Encoder Feedback: It processes encoder feedback signals from motor encoders, which are used to determine motor speed and position.3 It converts the differential signals (typically from 5V or 15V) into up/down and marker pulse output signals for use by the main drive control board (DSPC/SDCC).4
- High-Speed Fiber Optic Communication:
- The board provides fiber-optic network capabilities for high-speed, noise-immune communication.8
- This includes bridge-to-bridge communication between drive sections and master-to-master network communications between primary control devices.9
- It also transmits and receives synchronization signals necessary to coordinate the firing of the power semiconductor devices (SCRs/IGBTs) in the multi-bridge converter.10
- The board provides fiber-optic network capabilities for high-speed, noise-immune communication.8
System Context
The board is an interface component, sitting between the following key parts of a multi-bridge control system:
- Drive Control Board (DSPC or SDCC): The central processor of the drive, to which the SPCB connects via ribbon cable.11 The SPCB provides this board with conditioned, critical data (speed feedback, synchronization, and process control).12
- Multi-Bridge Hub Communications Board (MBI-IA): The SPCB interfaces with this board to manage the communication across the various power bridges in the drive.13
The DS200SPCBG1A features adjustable hardware such as jumpers, a DIP switch (SW1) to configure encoder inputs, and potentiometers (P1–P6), which can be tuned to optimize drive performance during commissioning.14
