Turbine control systems need precise servo valve regulation. The GE IS200EPCTG1A delivers reliable servo I/O interfacing for fuel and steam valves. This board functions as an EPCT series terminal board from GE Energy. It supports simplex (single) configuration for Mark VIe control systems.
Technical Specifications & Dimensions
This board handles servo valve commands and position feedback signals. The table below outlines its core technical parameters.
| Parameter | Specification |
|---|---|
| Servo Output Channels | 2 channels (4-20 mA or ±10V) |
| LVDT Input Channels | 2 channels (excitation and feedback) |
| Discrete Inputs | 4 points, 24V DC |
| Discrete Outputs | 2 points, relay type |
| Output Current per Channel | 20 mA maximum |
| LVDT Excitation Frequency | 2.5 kHz |
| Power Supply | 24V DC ±10% |
| Current Consumption | 300 mA typical |
| Unit Weight | 0.48 kg (1.06 lbs) |
| Board Dimensions | 190 x 160 x 25 mm |
| Number of Components | 3 ASICs + 8 op-amps + 12 capacitors |
Construction and Interface Layout
This board features a conformal-coated PCB for harsh environment protection. Such a design resists moisture, dust, and chemical contaminants. Furthermore, the GE IS200EPCTG1A provides multiple front-panel connectors for field wiring. You will find two 25-pin D-sub connectors on this interface. The board also includes a 20-pin header for backplane communication. An LED array shows power and channel status clearly.
Energy Storage and Signal Processing
Unlike standard I/O boards, this servo card includes dedicated LVDT excitation circuits. The board uses a bank of capacitors for analog output signal smoothing. Consequently, the GE IS200EPCTG1A delivers clean servo commands to valve drivers. Each servo output features a 12-bit DAC for precise current or voltage control. The board stores calibration parameters in non-volatile EEPROM memory. This storage retains settings even during power loss events.
Installation and Mounting Requirements
Installing the GE IS200EPCTG1A requires careful alignment with the backplane. The board slides into a dedicated slot within the Mark VIe cabinet. It also locks securely with injector/ejector handles at both ends. Always disconnect 24V power before inserting or removing this board. The unit uses passive cooling through natural convection. This design eliminates fan noise and mechanical failures. The board occupies a single VME slot in the rack.
Integration with Turbine Control Systems
This servo board works seamlessly with Mark VIe turbine controllers. It interfaces with electro-hydraulic servo valves and LVDT position sensors. Operators can configure the two channels for fuel or steam valve control. The GE IS200EPCTG1A also provides watchdog timers for fail-safe operation. Consequently, this board remains essential for turbine retrofits. The unit delivers consistent performance across a -30°C to +65°C temperature range.
Details
| Weight | 0.1 kg |
|---|---|
| Dimensions | 25 × 108 × 127 mm |
Reviews
There are no reviews yet.