Product Description:

The 67WKS-M240/3 is an analog servo amplifier produced by Kollmorgen for the 60wks Analog Servo Amplifiers series. Installed in a control cabinet, it converts the ±10 V command signal from a motion controller into regulated armature current, enabling closed-loop torque or velocity control of DC and brushless servo motors. By isolating high-energy switching from the low-voltage reference circuit, the unit provides a compact interface between automation logic and the motor windings in material-handling cells and precision assembly stations.

Its power stage is supplied by a 240 VDC bus, and the current loop responds up to 1 kHz, allowing fast disturbance rejection during load transients. Under continuous duty, the amplifier delivers a rated motor current of 3.5 A, while acceleration bursts can reach 10 A without saturating the output devices. The associated thermal and magnetic loading corresponds to a connected power of 0.6 kVA. With an output current form factor of 1.01, RMS and average values remain almost identical, minimizing additional copper heating. The command input is buffered by 150 kΩ of differential resistance, and its offset drifts only ±15 µV per kelvin, which stabilizes low-speed regulation. At rated current, the module dissipates 40 W, and another 15 W is lost at quiescence, figures that determine enclosure airflow requirements.

Mechanical integration is simplified by the enclosure size of 220 × 100 × 72 mm, and installation loads are low because the populated board weighs just 1 kg. A built-in auxiliary supply furnishes ±15 V for encoder or signal conditioning circuits, so external power modules can be omitted. For branch circuit safeguarding, the manufacturer specifies 3 × 16 A fuse links, and the internal power devices contribute only a 5 V residual drop to preserve motor voltage headroom at high currents.