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Kollmorgen BDS4A-203J-2101A2

Product Name:​ BDS4 Servo Amplifier (Brushless Drive Module)
Product Introduction:​ Legacy 3-phase brushless servo drive from the BDS4 platform, used widely in late-1990s to mid-2000s machine tools and converting lines before AKD replaced it.
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Detailed content

Technical Specifications:
  • Series: BDS4A (analog + digital hybrid command)
  • Rated current: ~3 A continuous (model 203 = 3 A class, J = internal option code)
  • Input: 3 × 208–240 Vac or DC bus variant
  • Output: 3-phase sinusoidal to motor
  • Command interface: ±10 V analog torque/velocity, encoder follower
  • Feedback supported: Incremental encoder, resolver (via option card 2101A2)
  • Switching: IGBT PWM, 20 kHz typical
  • Mounting: Panel/rail inside cabinet
Functional Features:​ Adjustable current/torque limit, velocity loop, tachometer emulation, LED fault diagnostics.
Application Scenarios:​ Retrofit of older CNCs, textile machinery, legacy material-test systems.
Material & Structure:​ Sheet-steel chassis, finned heat sink, plug-in terminal strips, DIP switch set for gain tuning.
Working Principle:​ Current-regulated PWM amplifier; receives analog command and encoder/resolver feedback, modulates 3-phase output.
Installation Requirements:​ Forced ventilation if stacked; keep ambient < 45 °C; separate signal and power cable routing.
Usage Notes:​ Obsolete—spares only; do not mix with 480 Vac mains without isolating transformer; tuning pots drift with age.

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