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The GE IS200DSCBH1AAA is a Simplex Serial Communication I/O Terminal Board designed for the GE Mark VI Speedtronic Turbine Control System.1
It is part of the Mark VI’s IS200 series of I/O boards, which are essential for connecting the main controller to field devices in gas and steam turbine applications.2
📡 Core Function and Features
- Function: This board serves as the physical interface for serial communication, facilitating data exchange between the Mark VI’s processor and various intelligent field devices.
- Acronym: DSCB stands for DIN-Rail Serial Communication Board.3
- Mounting: It is a DIN-rail mounted board, meaning it’s installed on a standard rail within a control cabinet, which simplifies wiring and maintenance.4
- System Connection: It is a Simplex (non-redundant) I/O board that connects to the main controller’s serial communications processor, typically the VSCA board, using a 37-pin cable.5
- Channels: The DSCB board generally provides up to six (6) channels for serial communication.6
- Protocols: It provides the physical wiring connections necessary to support industry-standard serial communication protocols such as RS-232C, RS-422, and RS-485.7
- Field Devices: It connects to external “smart” devices that utilize serial communication, such as:
- Intelligent Pressure Transducers (e.g., Honeywell Smart Pressure Transducers).8
- Electric Drives (e.g., Kollmorgen Electric Drives) for precise valve or actuator control.9
- Construction: The board features large Euro-block terminal blocks for wiring and includes internal components for noise suppression and signal integrity.10
🔍 Part Number Breakdown
The numerous letters at the end of the part number ($IS200\text{DSCBH1}\textbf{AAA}$) indicate specific hardware revisions, coating, and logic revisions:
- A (First Trailing A): This letter typically denotes the Hardware Revision of the printed circuit board (PCB) design.
- A (Second Trailing A): This usually indicates the Coating/Assembly Option. For GE I/O boards, this often signifies the presence of a conformal coating on the PCB for protection against moisture, dust, and chemical contaminants, which is vital in industrial settings.11
- A (Third Trailing A): This represents the Functional or Logic Revision (the software/firmware/logic loaded onto the board).12
In short, the IS200DSCBH1AAA is a heavily-revised version of the base serial communication terminal board, featuring the highest level of assembly and logic revisions available at its time of manufacture.
