Description
- Product Model: IS210WSVOH1AE
- Manufacturer: GE
- System Platform: Mark VIe
- Input Voltage: P28 (28 V DC nominal)
- Output Voltage: +15 V DC and -15 V DC for servo regulators
- Current Output Capability: Supports servo outputs up to -120 to +120 mA DC (derived from associated PSVO module)
- Excitation Output: Includes driver circuits for LVDT excitation at 7.14 V AC, 127 mA AC, 3.2 kHz
- Speed Input Range: -15 to +15 V DC
- Speed Sensor Power Output: 24 V DC, 40 mA DC
- Processor/Control: Interfaces with servo pack for current references; features configurable gains (up to five levels)
- Environmental Rating: Operating temperature -30°C to +65°C (typical for Mark VIe accessories)
- Mounting: Secured via four screws; includes heatsink for thermal management
- Connectors: Three J2 connectors (R, S, T) for WSVO driver connections
- Certifications: Compliant with IECEx (Ex ec IIC T4 Gc), IEC 60079-0/7/11; UL recognized components
- PCB Technology: Surface-mount with conformal coating
- Dimensions: Approximately 10.16 cm wide x 33.02 cm high (board assembly)
- Safety Features: Servo suicide relays for fault isolation; solid-state switches and LED indicators for status
Technical Architecture & Functional Positioning
The IS210WSVOH1AE is an accessory servo driver board within GE’s Mark VIe control ecosystem, primarily serving as a heatsink-integrated assembly for power conversion and regulation in servo valve control loops. It operates at the interface layer, accepting P28 voltage from the system power supply and generating isolated ±15V rails specifically for servo current regulators. This supports precise current control for actuators like fuel valves in gas turbines, where rapid and accurate response is essential to maintain operational parameters such as speed and load.
The design employs isolation amplification and configurable gain stages to optimize servo performance, mitigating issues like signal drift or instability under varying loads. Redundant elements, including multiple J2 connectors for R/S/T voting in TMR setups, enhance fault tolerance—critical in applications where a servo failure could lead to turbine overspeed or inefficient combustion. The heatsink ensures thermal dissipation during high-current operations, addressing overheating risks in enclosed cabinets. Overall, it solves real-world problems in turbine dynamics by providing stable power for LVDT feedback and valve positioning, reducing wear on mechanical components and improving system efficiency in continuous-run scenarios.
Typical Application Scenarios
- Used in gas turbine fuel control systems for regulating servo valves in response to speed or load demands, ensuring precise fuel flow and preventing instability.
- Applied in power generation for excitation and governor control, interfacing with LVDTs for position feedback in steam admission valves.
- Supports retrofit of Mark VI systems to Mark VIe, allowing drop-in replacement for enhanced diagnostics without rewiring.
- Deployed in industrial drives requiring high-accuracy current regulation, such as in compressor or pump turbines.
- Utilized in harsh environments like offshore platforms for auxiliary control loops, leveraging its temperature and vibration tolerance.
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