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The GE IS200BICLH1A is a specialized Printed Circuit Board (PCB) component known as the IGBT Drive/Source Bridge Interface Board (1$\text{BICL}$).2 It is a vital part of General Electric’s Drive Control Series, which is often integrated with the Mark VI Speedtronic Turbine Control System.3
This board’s primary function is to serve as the critical interface between the low-voltage control logic of the main processor and the high-power electronics (specifically the Insulated Gate Bipolar Transistors, or IGBTs) used in large industrial motor drives and power converters.4
⚙️ Core Function and Role
The 5$\text{BICL}$ board’s role is not to execute high-level control code but to ensure the safe and accurate operation of the high-voltage power switching components:6
- Communication Bridge: It acts as an interface between the main control board (like the 7$\text{DSPX}$) and the specialized bridge personality interface boards (8$\text{BPIA}$, 9$\text{BPIB}$, or 10$\text{SCNV}$) that manage the power stack.11
- Signal Translation: It translates the digital control commands from the central processing unit (12$\text{CPU}$) into the precise, high-speed gate signals required to switch the IGBTs on and off efficiently.13
- Protection and Monitoring: It integrates crucial protective functions:14
- Temperature Monitoring: It features 4 RTD (Resistance Temperature Detector) inputs to monitor both the bridge temperature and the ambient temperature, providing real-time feedback to the control system to prevent overheating and damage.15
- Fault Monitoring: It includes two fault string inputs and circuitry for monitoring and reporting critical interlock faults (e.g., bridge phase shunt and IGBT desaturation faults).16
- Auxiliary Control: It provides a PWM (Pulse Width Modulated) speed control interface for managing cooling fans, optimizing thermal performance.17
🛠️ Technical Features
The 18$\text{IS200BICLH1A}$ is a VME-style board designed to be installed in a specific slot within the control rack.19
| Parameter | Specification/Detail |
| Functional Acronym | BICL (Bridge Interface Control Board) |
| System Family | GE Mark VI Speedtronic / Innovation Series Drive Control. |
| Mounting | VME Rack. Typically marked “Install in Slot 5 Only” on the faceplate. |
| Control Logic | Handled by an EPLD (Electronically Programmable Logic Device), configured by the $\text{CPU}$ on power-up. |
| Identification | Includes a 1024-bit serial memory device programmed with board ID and revision information. |
| I/O | 4 RTD inputs, 2 Fault String Inputs, 1 PWM Output, 4 Relays. |
| Manual Reference | Documented in GE Instruction Manual GEI-100264. |
⚠️ Important Considerations for Replacement
- Slot Restriction: It is critical to install this board into the correct VME rack slot (typically Slot 5), as placing it in the wrong slot can cause immediate damage to the board and the backplane.20
- Revision Match is Crucial: The H1A suffix specifies the exact hardware and firmware. Due to its role in high-speed, safety-critical drive control, you must replace the board with an exact matching revision (or a GE-approved substitute) to ensure correct timing, protection logic, and EPLD configuration.
- ESD Precautions: The board is highly sensitive due to its dense concentration of components. Always follow strict Electrostatic Discharge ($\text{ESD}$) handling procedures.
