IS200AEPAH1BKE IS215WEPAH2BB | GE Mark VIe Wind Pitch Control Boards

IS200AEPAH1BKE and IS215WEPAH2BB are hardware‑revision control PCBs for GE Mark VIe Speedtronic control platform, dedicated for wind‑turbine pitch‑axis closed‑loop regulation. IS200AEPAH1BKE is an AEPA (Advanced Power Axis) board for 20 Nm pitch servo control, while IS215WEPAH2BB is a Non‑CANBus WEPA (Wind Energy Pitch Axis) board optimized for 30 Nm heavy‑duty pitch axis applications. Both modules can also handle auxiliary actuator control tasks for gas‑turbine, steam‑turbine and compressor units within Mark VIe architecture.

These boards collect analog sensor signals, incremental‑encoder position feedback, discrete interlock and limit‑switch status signals from field pitch‑mechanism equipment. They execute local closed‑loop control algorithm and output analog and discrete drive commands to pitch servo‑actuators and brake assemblies. Comprehensive on‑board hardware diagnostics detect wire breakage, short‑circuit and encoder faults, storing timestamped fault events in onboard flash memory for post‑failure analysis via GE ControlST software. The PCBs adopt conformal‑coating treatment for anti‑humidity and anti‑corrosion performance; IS215WEPAH2BB is additionally equipped with MOV surge‑suppression components for lightning and transient‑voltage protection, adapting harsh cabinet operating environments of wind‑turbine sites.

Hardware specifications:
Full part identifier: IS200AEPAH1BKE / IS215WEPAH2BB
Form factor: Standard 6U VME rack‑mount PCB
Compatible platform: GE Mark VIe Speedtronic control system, supports simplex and TMR triple‑modular‑redundant architecture
IS200AEPAH1BKE:
‑Function: AEPA 20 Nm pitch axis control board
‑Backplane communication: IONet backplane bus interface to UCV controller
‑Backplane power: 5 V backplane power; external 24 VDC field power supply
‑Feedback interfaces: incremental encoder input for position acquisition
‑Discrete I/O & relay outputs for safety interlock, limit‑switch and brake‑control logic
‑Operating temperature: ‑40°C ~ +85°C; storage temperature: ‑40°C ~ +85°C
‑Humidity: 5%‑95% non‑condensing environment
‑Conformal‑coated printed circuit board
‑Weight: approx 0.68 kg

IS215WEPAH2BB:
‑Function: WEPA Non‑CANBus 30 Nm pitch axis control board
‑Variant note: Non‑CANBus hardware version, cannot substitute WEPAH1 CANBus series
‑Backplane communication: IONet / UDH backplane bus interface
‑Surge protection: On‑board MOV varistor components for transient and lightning protection
‑Field power supply: 125 VDC field power input
‑Feedback interfaces: incremental encoder input for position acquisition
‑Discrete I/O & relay outputs for safety interlock, limit‑switch and brake‑control logic
‑Operating temperature: ‑40°C ~ +85°C; storage temperature: ‑40°C ~ +85°C
‑Humidity: 5%‑95% non‑condensing environment
‑Conformal‑coated printed circuit board
‑Weight: approx 0.72 kg

Typical applications: wind‑turbine pitch‑axis control (20 Nm / 30 Nm variants), on‑shore wind farm cabinet maintenance, gas‑turbine auxiliary‑axis control, steam‑turbine valve‑position control, compressor auxiliary actuator control, spare‑part replacement and retrofitting of existing Mark VIe installations.

Product status: Original OEM units, fully discontinued by GE Vernova. We supply surplus new stock and fully‑tested used‑refurbished spare units. Warranty is available for all delivered goods. Items are ready for international shipment.

Frequently Asked Questions
Q1: What do suffix BKE and BB represent?
A: BKE and BB are hardware revision codes for IS200AEPAH1BKE and IS215WEPAH2BB respectively. BB is upgraded hardware for improved vibration and surge resistance. Full part number including suffix must be confirmed for replacement to avoid system faults.

Q2: Can IS200AEPAH1BKE replace IS215WEPAH2BB?
A: No. IS200AEPAH1BKE is AEPA 20 Nm variant with 24 VDC field power. IS215WEPAH2BB is Non‑CANBus WEPA 30 Nm variant with 125 VDC field power. Pin‑out definition, power domain and firmware requirements differ completely. Direct cross‑model replacement is forbidden.

Q3: Can IS215WEPAH2BB replace CANBus WEPAH1 boards?
A: No. IS215WEPAH2BB belongs to Non‑CANBus H2 series. Hardware circuit and signal definition are incompatible with CANBus WEPAH1 series. Mix‑up will trigger pitch system failure.

Q4: Which control system are these two boards compatible with?
A: Designed for GE Mark VIe Speedtronic 6U‑VME rack systems, supports simplex and TMR redundant architecture. Not compatible with original Mark‑VI platform without hardware modification.

Q5: Does this board support hot‑swap operation?
A: Hot‑swap is allowed under redundant TMR Mark VIe architecture. For non‑redundant simplex system, cut off rack power supply before module replacement to prevent unexpected actuator movement.

Q6: What software is required for configuration and fault diagnosis?
A: Parameter configuration, commissioning and fault‑log reading are completed through GE ControlST software suite. On‑board flash memory saves timestamped fault‑event records for troubleshooting. The hardware itself does not store user application project files.

Q7: Are IS200AEPAH1BKE and IS215WEPAH2BB still in production?
A: Both boards are completely discontinued by GE Vernova. We provide original surplus new stock and fully‑tested refurbished spare parts for legacy wind‑farm and energy‑system maintenance.

Q8: Why pitch‑related alarms occur after board replacement?
A: Common root causes: mismatched hardware suffix or CAN‑Non‑CAN variant confusion, poor encoder wiring, shielding‑grounding defects, incomplete project parameter download via ControlST, or damaged field sensor. Always verify full part number before installation and download project parameters after hardware swap.

Q9: Do IS200AEPAH1BKE and IS215WEPAH2BB come with conformal coating?
A: Yes, original units are conformal‑coated on PCB surface to resist moisture and corrosive gas inside wind‑turbine control cabinets.