GE IS215WEPAH2BA

Product Overview

The IS215WEPAH2BA is an enhanced Wind Energy Pitch Axis (WEPA) controller board engineered by GE for the Mark VIe Speedtronic wind turbine control platform, serving as the core control unit for precise pitch angle regulation in utility-scale wind turbines. It builds on the base IS215WEPAH2B design with upgraded I/O processing and communication capabilities, integrating the AEPAH1B base board and BPPB daughterboard for modular flexibility. The board operates on 125 VDC power, features conformal coating for harsh environments, and supports simplex or triple redundancy configurations to maximize system availability. It includes three COM ports, a 10BaseT/AUI Ethernet interface, and dual RS‑485 ports for seamless integration with SCADA systems, pitch actuators, and condition monitoring devices. The IS215WEPAH2BA executes deterministic pitch control algorithms at 10/20/40 ms frame rates, ensuring optimal energy capture, rotor speed regulation, and structural load mitigation in onshore and offshore wind farm applications. It enables hot-swappable replacement and ToolboxST compatibility for remote diagnostics, firmware updates, and performance verification, making it a critical component for reliable wind turbine operation.

Category: GE

Description

Technical Specifications

Parameter	Details
Model Number	IS215WEPAH2BA
Manufacturer	General Electric (GE Energy)
Module Type	Enhanced Wind Energy Pitch Axis (WEPA) Controller Board
Series Compatibility	Mark VIe Speedtronic Wind Turbine Control Systems
Functional Revision	BA
Form Factor	Modular PCB Assembly (AEPAH1B Base + BPPB Daughterboard)
Power Supply	125 VDC
Power Consumption	22 W (typical)
PCB Coating	Conformal Coating (moisture/dust/salt spray protection)
Operating Temperature	-30°C to +65°C
Storage Temperature	-40°C to +70°C
Relative Humidity	10–95% (non-condensing)
Shock (Non-Operating)	10G
Dimensions (H×W×D)	12.7 cm × 12.7 cm × 13.2 cm
Weight	0.45 kg
Software Frame Rates	10, 20, and 40 ms
I/O Isolation	2500 VAC input-to-output isolation
Certifications	CE, UL 508, IEC 61010, IEC 61400-25
Manual Reference	GEP-9145

I/O Interfaces

I/O Type	Quantity	Details
Analog Inputs	9	8 general-purpose, 1 dedicated incremental encoder input
Discrete Inputs	20	24 VDC, sinking/sourcing
Discrete Outputs	2	24 VDC, 2 A per channel
Relay Outputs	9	250 VAC/30 VDC, 5 A per channel
Communication Interfaces	3 COM Ports (COM1, COM2, micro 9-pin D‑socket), 2 RS‑485, 1 10BaseT/AUI Ethernet	Supports MODBUS RTU/TCP, IEC 60870-5-104
PWM Outputs	2	0–10 VDC, 1 A for pitch actuator control

Function Features

Enhanced Pitch Control Processing: Upgraded DSP firmware executes advanced Mark VIe pitch control algorithms for improved rotor speed regulation and load mitigation.
Modular I/O Expansion: 9 analog inputs (including encoder), 20 discrete inputs, 2 discrete outputs, 9 relay outputs, and 2 PWM outputs for comprehensive pitch system monitoring and actuation.
Dual RS‑485 Communication: Enables real-time data exchange with SCADA systems, pitch actuators, and condition monitoring devices for centralized control and diagnostics.
Conformal Coating: Protects against salt spray, moisture, and dust in offshore and coastal wind turbine environments.
Redundancy Support: Configurable for simplex or triple redundancy to ensure fault-tolerant operation in critical wind farm applications.
Deterministic Frame Rates: Operates at 10/20/40 ms software frame rates for precise pitch angle adjustments and real-time control.
Encoder Feedback Processing: Dedicated incremental encoder input for accurate rotor speed and pitch angle measurement, enabling closed-loop control.
Relay Output Control: 9 relay outputs for emergency shutdown, brake control, and status indication in pitch systems.
PWM Actuator Control: 2 PWM outputs for precise positioning of hydraulic/electric pitch actuators, ensuring smooth energy capture.
Advanced Diagnostics: ToolboxST compatibility for remote troubleshooting, firmware updates, and pitch system performance verification.
Hot-Swappable Design: Edge connectors allow module replacement without system shutdown, minimizing maintenance downtime.
Ethernet Connectivity: 10BaseT/AUI Ethernet interface for integration with wind farm SCADA and DCS for centralized monitoring.

Application Scenarios

Utility‑Scale Wind Turbines: Primary pitch controller for Mark VIe-based wind turbines, optimizing energy capture and reducing structural loads via precise pitch regulation.
Offshore Wind Farms: Operates reliably in marine environments with conformal coating protection against salt spray, humidity, and temperature fluctuations.
Wind Turbine Retrofits: Direct replacement for legacy WEPA boards in Mark VIe upgrades, enhancing processing power and communication capabilities.
Pitch System Redundancy: Configured for triple redundancy in critical applications to ensure continuous operation during component failures.
Wind Farm Automation: Interfaces with SCADA systems for centralized control of multiple turbines, enabling efficient load distribution and grid integration.
Structural Load Management: Executes advanced pitch algorithms to mitigate rotor/tower loads during high wind speeds, extending turbine lifespan.
Cold‑Climate Wind Installations: Operates in extreme temperatures (-30°C to +65°C) for reliable performance in arctic and subarctic regions.

Compatibility and Integration

Mark VIe Ecosystem: Fully compatible with Mark VIe controllers, I/O modules (IS210AEAAH2B), and communication boards for seamless wind turbine system integration.
Software Support: Configurable via GE ToolboxST for pitch control logic programming, I/O mapping, and diagnostic analysis.
Pitch Actuator Compatibility: Interfaces with hydraulic/electric actuators via PWM outputs and RS‑485 for precise positioning control.
SCADA Integration: Supports MODBUS RTU/TCP and IEC 60870-5-104 for real-time data exchange with wind farm SCADA and DCS.
Documentation: Detailed guidelines available in the GE Mark VIe WEPA Controller Application Guide (GEP-9145) and Wind Turbine Pitch System Manual.

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