Product Description:

The 64WKS-M240/50-RLG is an analog servo amplifier manufactured by Kollmorgen and assigned to the 60WKS Analog Servo Amplifiers series. Within an automation cell, this board conditions command voltages and regulates motor phase current so that a servo motor follows speed or position references with minimal error. By closing the current loop inside the drive, it reduces the workload on the machine controller and delivers rapid torque response for axes that demand accurate force control.

An input span of ±10 V accepts differential speed or torque commands, while the input resistance of 20 kΩ prevents loading the upstream signal source. The power section is built around a rated DC link of 240 VDC, which is the maximum usable bus voltage before the overvoltage circuitry intervenes. Continuous motor current is held at 50 A, but the design allows a peak of 100 A for short acceleration bursts. The current loop bandwidth reaches 1 kHz, so reference changes within that range are tracked with little phase lag, and the 8.5 kHz output stage clock modulates the transistors to keep ripple outside the mechanical spectrum. Input drift is ±15 µV/K, which helps keep command offset stable as cabinet temperature shifts, and a current form factor of 1.01 keeps RMS and average current nearly identical, limiting copper losses.

Physical installation is simplified by board dimensions of 220 × 233.4 × 91 mm and a mass of 2.5 kg, allowing vertical stacking inside narrow enclosures. Protection circuitry disconnects the drive when the DC bus rises to 325 V, shielding downstream devices. During rated operation, the heat sink must dissipate 280 W, while quiescent standby consumes only 20 W. The connected load rating is 9 kVA, and a residual voltage drop of 4 V across the output stage leaves most of the bus voltage available to the motor windings.