Product Description:

The 60WKS-M240/12-PB is an analog servo amplifier manufactured by Kollmorgen for the 60WKS Analog Servo Amplifiers series. It converts the energy on its DC link into controlled motor phase current so that torque, speed, and position loops in an automation cell can be closed with minimal latency. Used with matching drives and external ballast circuitry, the unit provides the current shaping required for brushless and brushed servo motors in material-handling, printing, and gantry stages.

The amplifier’s DC bus is stabilized at a rated level of 240 V, and it delivers a continuous motor current of 12 A while tolerating peaks up to 30 A for acceleration or shock loads. Current regulation is quick because the internal loop bandwidth is 1 kHz, which indicates how quickly the control electronics can respond to command changes. The amplifier requires a minimum motor inductance of 1.2 mH so that it remains stable when connected to low-impedance windings. Three 20 A time-lag AC fuses protect the mains input, and the output current form factor of 1.01 keeps RMS and average values nearly identical, reducing additional copper loss in the motor. When the DC bus exceeds 300 V, the ballast resistor engages and can absorb 135 W continuously; if the voltage falls to 285 V, the resistor is disconnected to avoid unnecessary heat.

The ballast can dissipate pulses of 5.4 kW during rapid deceleration, and total amplifier heat at rated load is 85 W, plus 12 W of quiescent dissipation when enabled but idle. An overvoltage cutoff at 325 V protects the power stage against regenerated energy that exceeds the ballast limit. Voltage drop across the transistors is held to 5 V at rated current, helping the servo maintain high stiffness. Overall weight is 1.4 kg, which keeps the assembly relatively light for panel mounting.