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Kollmorgen AKD-B02406-NBA

Product Introduction:​
The AKD-B02406-NBA is a high-current Ethernet servo amplifier in the AKD “B” (480 Vac 3-phase, book-style) platform. It supplies 24 Arms continuous and 48 Arms peak for roughly 5 seconds, supporting up to 8 kW continuous output at 400–480 Vac. It is intended to drive AKM4, AKM5, and smaller AKM6 motors, or pairs of lower-current axes via a shared DC bus. The drive integrates STO-capable safe torque off, full resolver/encoder feedback support, and all major industrial Ethernet protocols.
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Detailed content

Technical Specifications:
  • Supply Voltage:​ 380–528 Vac 3-phase, 50/60 Hz
  • Internal DC Bus:​ 340–680 Vdc (auto-managed)
  • Continuous Output Current:​ 24 Arms
  • Peak Output Current:​ 48 Arms (5 s)
  • Continuous Output Power:​ 8000 W at 480 Vac
  • Control Logic Supply:​ 24 Vdc ±10 % (external, 1 A minimum)
  • Current Loop Update:​ 0.67 µs
  • Velocity Loop Update:​ 62.5 µs
  • Position Loop Update:​ 125 µs
  • Feedback Support:​ Resolver, Incremental, Sine/Cosine, EnDat 2.1/2.2, BiSS, Hiperface, SFD, SFD-M
  • Fieldbus:​ EtherCAT, PROFINET RT, EtherNet/IP, CANopen, Modbus TCP, SynqNet (option dependent)
  • Digital I/O:​ 8 inputs / 3 outputs optically isolated, 24 Vdc
  • Analog I/O:​ 1 × ±10 V input, 1 × ±10 V output
  • Safety:​ STO (Safe Torque Off) via option card or onboard terminals depending on variant
  • Protection Rating:​ IP20
  • Operating Temp:​ 0–45 °C (derate above 40 °C)
  • Dimensions (H×W×D):​ 248 × 96 × 228 mm
  • Weight:​ 3.7 kg
  • Mounting:​ Vertical panel mount, min. 10 mm side gap, 50 mm top/bottom airflow
Functional Features:
  • DSP-based vector control with wizard-driven full-frequency autotune
  • Electronic gearing, camming, indexing, and position-latch functions
  • Kollmorgen WorkBench GUI over Ethernet service channel
  • Plug-and-play with AKM motors via stored motor files
  • Regen resistor connection terminal for dynamic braking
  • Screw-terminal power/I/O and D-sub feedback connectors
  • Supports KAS (Kollmorgen Automation Suite) multi-axis projects
Materials and Structure:
  • Folded sheet-steel chassis, powder-coated
  • Aluminum heat sink with longitudinal fins on rear
  • PCB with conformal coating on control section
  • Detachable front connector blocks
  • Fan-less convection cooling for 24 A class (aux fan not required below 40 °C)
Working Principle:​
The drive rectifies the 3-phase line to a DC bus, then uses IGBT PWM inverter stages to synthesize sinusoidal phase currents. Rotor position from the feedback device closes the current loop; the velocity and position loops run on the DSP. STO removes gate drive enable when safety circuit opens.
Installation Requirements:
  • 3-phase supply on L1/L2/L3 with proper fusing or MCCB
  • 24 Vdc logic supply from isolated PSU
  • Shielded motor cable, shield grounded at drive end 360°
  • Feedbacks on separate shielded cable, not bundled with power
  • STO wires must follow ISO 13849-1 / IEC 61800-5-2 routing
  • Vertical mount only; do not block top/bottom ventilation slots
Application Scenarios:
  • CNC rotary tables
  • Filling and capping machines
  • Robot joint actuators (mid-size)
  • Converting machinery unwind/rewind sections
  • Test rigs and servo-hydraulic replacement axes
Usage Notes:
  • NBA suffix = base drive, no extra option cards, standard firmware, US label
  • Pair with AKM42/52/53/62 class motors for correct current match
  • Do not run 24 A continuous in cabinet ambient above 45 °C without forced air
  • Regeneration energy above bus limit must be dissipated in external resistor
  • Firmware and motor parameters are backed up through WorkBench, not on-board MMC (unlike S700)

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