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The GE IS200DSCBH1A is a DIN-rail mounted Simplex Serial Communication I/O Terminal Board (Functional Acronym: DSCB).1 It is an integral component of General Electric’s Mark VI Speedtronic Turbine Control System series.2
📡 Primary Function and System Role
- Function: The DSCB board serves as the physical interface for serial communication between the Mark VI control system’s processor and various external field devices.3
- System Integration: It is a Simplex (non-redundant) I/O board that connects directly to the VSCA (VME Serial Communications Card) processor board via a 37-pin cable.4
- Communication: The VSCA board provides the intelligence for the communication interfaces, using industry-standard protocols such as RS-232C, RS-422, and RS-485 serial communications.5 The DSCB is the terminal point where the physical wiring for these serial links connects to the control system.6
- Field Devices: It typically interfaces with “smart” devices that require a serial connection for data exchange, such as:
- Intelligent Pressure Transducers (e.g., Honeywell Smart Pressure Transducers).7
- Electric Drives (e.g., Kollmorgen Electric Drives) used for valve actuation.
⚙️ Key Features
| Feature | Detail |
| Mounting | DIN-Rail mounted, designed for installation in terminal cabinets. |
| Channels | Provides up to six (6) channels for serial communication. |
| Connections | Uses large Euro-block terminal blocks for wiring field devices. |
| Design | Features noise suppression circuitry to maintain signal integrity over long cable runs. |
| Coating | The printed circuit board (PCB) usually features a conformal coating for enhanced protection in harsh industrial environments. |
In essence, the IS200DSCBH1A acts as the secure, noise-resistant connection hub that allows the turbine control system to digitally communicate with and receive data from critical intelligent instrumentation and actuators in the power plant.
