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3. Key Technical Specifications
| Parameter | Value |
| Functional Acronym | WEPA (Wind Energy Pitch Axis) |
| System Compatibility | GE Wind 1.X, 2.X, and 3.X (such as 1.6-82.5) with Mark VIe controls |
| Board Assembly Parts | Typically constructed from an AEPA baseboard and a BPPC/BPPB processor daughterboard |
| Analog Interfaces | 8 x Analog Inputs, 1 x Analog Output, 1 x Dedicated high-resolution input |
| Discrete Signal Capacity | 20 x Discrete Inputs, 2 x Discrete Outputs, 9 x Dry-contact Relay Outputs |
| Positioning Feedback | 1 x High-speed incremental encoder interface |
| Drive Outputs | 2 x High-accuracy Pulse Width Modulated (PWM) drive controllers |
| External Communications | 2 x RS-485 serial ports, COM1/COM2 serial ports, 1 x 10BaseT/AUI Ethernet connector |
| PCB Coating | Heavy Conformal Coating (designated by the “H” prefix in H2B) |
| Software Frame Rates | Support for 10 ms, 20 ms, and 40 ms execution sweeps |
| Environmental Limits | Relative Humidity: 10% to 95% (non-condensing); Operating temp: -30°C to +65°C |
4. Product Introduction & Supply Chain Strategy
The GE Vernova IS215WEPAH2B (known interchangeably by its technical manufacturing drawing number 109W3914P003) is a high-performance, double-slot Wind Energy Pitch Axis (WEPA) controller module developed for GE’s 1.X and 2.X megawatt wind turbine platforms. Mounted within the high-vibration environment of the turbine hub or nacelle, the WEPA module executes closed-loop, synchronized speed and position control of the blade pitch motors. By combining heavy-duty physical signal conditioning, a dedicated incremental encoder interface, and twin high-frequency Pulse Width Modulation (PWM) outputs on a single card, it coordinates precise blade adjustments to optimize power capture and safe emergency feathering.
From an asset-preservation perspective, the IS215WEPAH2B is a high-risk Single Point of Failure (SPOF) component. Standard turbine hubs experience extreme thermal swings, intense structural vibrations, and lightning-induced surges, exposing electronic control boards to high operational wear. If a pitch axis controller faults, the turbine automatically executes a fast feathering shutdown to prevent an overspeed hazard, causing immediate loss of generation revenue.
Sourcing this component as a certified New Surplus unit protects your assets from the inherent risks of repaired cards. Refurbished parts often feature thermal trace fatigue or degraded optocouplers that fail under cold start-ups. Stocking zero-hour original surplus spares ensures your service crews have a clean, immediately deployable replacement on-site, minimizing downtime and avoiding the cost of emergency crane callouts.
- IS215WEPAH2B 109W3914P003
- IS215WEPAH2B 109W3914P003
5. Installation & Technical Alignment Guide
Stage 1: Pre-Installation Prep
Safely isolate and lock out all 125 VDC/24 VDC control power buses and primary pitch-axis battery bank backups. Confirm the pitch hub is mechanically locked using the rotor lock pin. Wear a grounded ESD wrist strap before unboxing the replacement IS215WEPAH2B to safeguard its sensitive onboard FPGA arrays and processor chips from static discharge.
Stage 2: Mechanical Extraction
Tag and disconnect all communication plugs, the Ethernet connection, the encoder input shield, and serial cables from the front ports. Loosen the upper and lower faceplate screws. Simultaneously pull the top and bottom ejection tabs outward to disengage the rear VME-style backplane connectors. Slide the heavy assembly horizontally out of its card guide tracks.
Stage 3: Configuration & Insertion
If you are upgrading or replacing a specific version of the module, verify the sub-board grouping matching code (BPPC/BPPB daughterboards). Confirm that any physical address switches or jumpers on the replacement card match the original. Slide the new board along the chassis guides, applying firm pressure at the end so the rear pins seat completely. snap the ejector levers back into their locked positions and secure the faceplate screws.
Stage 4: Network Re-commissioning
Reattach all communication, encoder, and auxiliary cables. Apply 125 VDC control power. The system will boot into its hardware self-test diagnostic. Using the GE ToolboxST or ControlSystem Toolbox application, verify that the module synchronizes within the defined 10/20/40 ms software frame rate, clear historical fault registers, and perform a slow manual pitch command test to calibrate absolute encoder feedback.
6. Frequently Asked Questions (FAQ)
What is the relationship between IS215WEPAH2B and the 109W3914P003 part number?
The IS215WEPAH2B is GE’s functional catalog identifier for the Wind Energy Pitch Axis module assembly, representing its system hardware family. The 109W3914P003 is the GE Vernova manufacturing part number (and engineering drawing BOM specification) printed directly on the outer casing or PCB. They represent the exact same physical and logical module assembly.
What are the two Pulse Width Modulation (PWM) outputs used for?
The two onboard PWM outputs deliver high-speed, variable-width control signals directly to the pitch axis drive converters. These signals allow the WEPA module to dynamically scale the power applied to the pitch motor windings, enabling smooth speed adjustments, reduced structural gear wear, and precise blade angle positioning during active power regulation.
Is this board a rebuilt or used item?
This is a Brand New Surplus unit. It has not been used, has not been pulled from a decommissioned asset, and is not a third-party repair. The assembly is delivered in factory-grade protective packaging, displaying clean, original solder tracks, unscored backplane connector pins, and pristine conformal protection.
Does this board support Simplex or Redundant configurations?
The IS215WEPAH2B is designed to support both simplex and triple modular redundant (TMR) applications. In standard wind turbine configurations, it operates in a simplex architecture, interfacing directly with its local pitch axis. In high-reliability utility applications, it can be bridged across redundant communication loops.
What warranty terms apply to this legacy WEPA module?
We protect this New Surplus IS215WEPAH2B module with our comprehensive 1-year operational warranty from your date of purchase. If a component defect occurs during this window, we handle replacement or repair immediately, shielding your operating budget from the limited 30-day structural warranties typically packaged with refurbished alternative components.
