Product Description:

The 64WKS-M240/70-RLG is an amplifier card manufactured by Kollmorgen and supplied within the 60WKS Analog Servo Amplifiers series. The board converts a regulated DC bus into high-bandwidth, closed-loop armature current for servomotors, allowing precise velocity or torque control on automation axes. By accepting command signals from a controller and modulating motor current, it forms the power interface between low-level motion commands and the electromechanical drive components used in packaging lines, machine tools, and material-handling equipment.

During normal operation, the amplifier operates from a rated DC bus of 240 V DC and delivers a continuous output of 70 A to the motor phases. Transient demands are covered by a peak capability of 140 A, so rapid acceleration profiles do not saturate the power stage. Current is switched by an output bridge clocked at 8.5 kHz, and this high frequency, together with a current-control bandwidth of 1 kHz, helps keep ripple low and tracking fast. The phase output has a form factor of 1.01, indicating near-sinusoidal current even under modulation. An input resistance of 20 kΩ allows direct connection to standard ±10 V command sources, while a residual voltage drop of 4 V appears across the output transistors at full load.

Thermal and protective data affect cabinet requirements. When loaded at rating, the card dissipates 400 W, and it draws only 20 W at idle, so airflow must be sized for these losses. The upstream supply should be able to furnish 12 kVA, and the DC link is protected by an overvoltage threshold of 325 V that triggers shutdown. A ±15 V auxiliary output is available for encoder or logic electronics. The open-frame IP00 design, together with board dimensions of 220 × 233.4 × 91 mm and a mass of 2.5 kg, favors integration on insulated backplanes rather than exposed areas.