ABB FENA-21

ABB FENA-21

Product Introduction:
The ABB FENA-21 is a specialized resolver interface module designed for ABB AC drives. It provides a robust and highly reliable feedback interface for resolver-type encoders, which are widely used in extreme industrial environments due to their immunity to shock, vibration, and temperature extremes.

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Category: SKU: ABB FENA-21

Description

ABB FENA-21

Technical Specifications:

  • Feedback Type: Resolver (Analog position feedback).
  • System Compatibility: ABB ACS880, DCS880, and other compatible industrial drives.
  • Excitation Frequency: Typically operates with standard resolver excitation frequencies (e.g., 4 kHz to 10 kHz).
  • Position Resolution: High-resolution digital conversion of analog resolver signals.

Functional Features:

  • Analog-to-Digital Conversion: Precision R/D (Resolver-to-Digital) converter for accurate angle tracking.
  • Signal Conditioning: Amplifies and filters the weak analog sine/cosine signals from the resolver.
  • Diagnostics: Continuous monitoring of resolver signal integrity, including loss of signal and short-circuit detection.
  • Temperature Compensation: Built-in compensation for resolver signal variations over wide temperature ranges.

Application Scenarios:

  • Servo drives and high-performance motion control systems.
  • Harsh environment applications such as steel rolling mills, mining, and marine propulsion.
  • Applications requiring absolute reliability where optical encoders would fail.

Performance Parameters:

  • Tracking Error: Minimal phase lag and tracking error for high-bandwidth servo loops.
  • Noise Immunity: Exceptional rejection of EMI and RFI due to the analog nature of resolver signals.

Material Composition & Structural Features:

  • Form Factor: Compact plug-in module matching ABB drive option slot standards.
  • Connectors: Secure terminal blocks or D-Sub connectors for resolver excitation and feedback signals.

Working Principle:
The module generates a high-frequency sine wave excitation signal for the resolver. It then measures the amplitude-modulated sine and cosine return signals, converting them into a precise digital representation of the motor’s shaft angle and speed.

Installation Requirements:

  • Mount securely in the drive’s option slot.
  • Use shielded, twisted-pair cables specifically rated for resolver signals to prevent noise pickup.

Usage Precautions:

  • Ensure the resolver excitation voltage and frequency match the module’s configuration parameters.
  • Verify proper grounding of the resolver shield to prevent signal interference.

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