Description
Product Overview
The Kollmorgen 60WKS-M24003-PB is a 3 A transistorized analog servo amplifier from the Kollmorgen 60WKS series. Designed for 240 V DC-link operation, it controls compatible synchronous servo motors through a three-phase pulse-width-modulated output stage. The amplifier supports four-quadrant operation, allowing controlled motoring and regenerative braking. Its analog control architecture uses setpoint inputs and RLG/tachometer feedback for closed-loop speed or torque regulation. The unit is intended for industrial motion systems that require a dedicated amplifier matched to the motor’s electrical characteristics and feedback arrangement.
The 60WKS platform was developed for Kollmorgen SM-series synchronous motors with RLG/tachometer feedback and trapezoidal commutation. The 3 A version provides a rated output current of 3 A in four-quadrant operation, with a peak output capability of 7.5 A for approximately five seconds. Its analog setpoint interface supports ±10 V signals, while the current-control loop has a documented 1 kHz bandwidth. A ballast circuit manages regenerative energy returned to the DC link during deceleration. These characteristics make the Kollmorgen 60WKS-M24003-PB suitable for legacy CNC machinery and other established motion-control installations where the original motor and feedback architecture must be retained.
Replacement work requires more than matching the 3 A rating. The amplifier must be compatible with the installed 60WKS backplane, power supply arrangement, motor inductance, feedback wiring, and control signals. The PB designation is part of the documented 60WKS amplifier family. Confirm the complete nameplate designation and installed options before ordering. The Kollmorgen 60WKS-M24003-PB is an amplifier module, not a motor; confusing these component types can lead to incorrect procurement and commissioning decisions.
Product Introduction
Legacy servo systems often become difficult to maintain when an amplifier fails but the machine’s original motor, feedback device, and control architecture remain serviceable. Replacing the drive with a different technology can require changes to wiring, tuning, and machine-control logic.
The 60WKS-M24003-PB provides the original 3 A analog amplifier architecture for compatible Kollmorgen SM-series applications. Before installation, verify the DC-link arrangement, RLG/tachometer feedback, motor inductance, and backplane connections. These checks are essential to avoid damage during startup.
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Kollmorgen / Seidel |
| Model | 60WKS-M24003-PB |
| Series | 60WKS |
| Product Type | Analog transistorized servo amplifier |
| Rated Supply | 3 × 60–172 VAC |
| Supply Frequency | 50–60 Hz |
| Rated DC-Link Voltage | 240 VDC |
| Rated Output Current | 3 A |
| Peak Output Current | 7.5 A, approximately 5 seconds |
| Operation | Four-quadrant |
| Installed Load at Rated Current | 0.5 kVA |
| Analog Setpoint | ±10 V |
| Current-Loop Bandwidth | 1 kHz |
| Output-Stage Switching Frequency | 2 × 8.5 kHz |
| Minimum Motor Inductance | 5 mH for the 3 A version |
| Ballast Switch-On Threshold | 300 V |
| Ballast Switch-Off Threshold | 285 V |
| Ballast Continuous Power | 135 W |
| Ballast Pulse Power | 5.4 kW |
| Overvoltage Shutdown Threshold | 325 V |
| Control Connector | DIN 41612-C64 |
| Power Connector | DIN 41612-D32 |
| RLG/Tachometer Connector | 9-pin Sub-D |
| Mechanical Format | Double Eurocard |
| Dimensions | 220 × 233.4 × 45 mm |
| Weight | Approximately 1.4 kg |
| Protection Class | IP00 |
Specifications are based primarily on Kollmorgen’s 60WKS installation documentation. Actual installation limits must follow the manual’s ambient, ventilation, transformer, and wiring requirements.
60WKS-M24003-PB
Major Features and Advantages
3 A rated output with short-duration peak capability
The amplifier is rated for 3 A output current and supports a peak current of 7.5 A for approximately five seconds. This provides transient current capacity for acceleration and short-duration load changes. The peak rating must not be treated as a continuous operating value.
Four-quadrant operation
The 60WKS amplifier supports motoring and regenerative operation in both directions. During deceleration, energy returned by the motor is managed through the DC-link and ballast circuit. Correct ballast operation is important in applications with frequent braking cycles.
Analog command interface
The ±10 V setpoint interface supports conventional analog motion-control architectures. This is useful in older CNC and machine-control installations where the command signal is generated by an established controller or analog motion interface.
RLG/tachometer feedback
The 60WKS platform is designed for compatible RLG/tachometer feedback arrangements. Feedback wiring, signal polarity, shielding, and connector pin assignments should be checked before startup. A feedback mismatch can cause unstable operation or prevent the drive from enabling.
Integrated ballast circuit
The documented 3 A version includes a ballast circuit with a 300 V switch-on threshold and 285 V switch-off threshold. Its specified continuous and pulse power ratings are 135 W and 5.4 kW respectively. These ratings are part of the amplifier’s regenerative-energy management design, not a general-purpose external braking resistor specification.
Eurocard rack construction
The double-Eurocard format allows installation in the designated 60WKS rack or compatible housing and backplane arrangement. Mechanical dimensions alone do not establish electrical compatibility with another rack system.
Related Products
The following models belong to the same 60WKS-M240 amplifier family. Current ratings differ, so replacement selection must account for the motor and machine load.
- 60WKS-M240/6-PB – 6 A rated-output version.
- 60WKS-M240/12-PB – 12 A rated-output version.
- 60WKS-M240/22-PB – 22 A rated-output version.
- 60WKS-M240/26-PB – 26 A rated-output version.
- 56WK-P240/80-B – Related 60WKS system power supply family component; verify the complete power-supply configuration.
- Kollmorgen SM Series Motors – Synchronous servo motors specified for the 60WKS drive family.
These are related system components, not interchangeable substitutes.
Frequently Asked Questions
Q1: Is the Kollmorgen 60WKS-M24003-PB a servo motor or a servo amplifier?
It is a servo amplifier. Kollmorgen’s 60WKS manual identifies the M240/xx-PB family as transistorized servo amplifiers for synchronous servo motors.
Q2: What is the rated output current?
The /3-PB version is rated at 3 A for four-quadrant operation. Its documented peak output current is 7.5 A for approximately five seconds.
Q3: Which motors are compatible with this amplifier?
The 60WKS series is documented for Kollmorgen SM-series synchronous servo motors with RLG/tachometer feedback and trapezoidal commutation. Confirm motor type, inductance, feedback configuration, and current requirements before connecting a motor.
Q4: Can I replace it with the 6 A or 12 A version?
Do not treat a higher-current model as an automatic replacement. The 6 A and 12 A versions have different electrical ratings and minimum motor-inductance requirements. Review the motor, power supply, protection, and machine-control design before changing amplifier size.
Q5: Can I hot-swap the 60WKS-?
Do not assume hot-swap capability. The unit operates with hazardous DC-link voltage and is installed in a designated power and control backplane. Follow the manufacturer’s isolation and discharge procedure before removal or installation.
Q6: Does this amplifier support firmware v3.1?
The 60WKS- is an analog servo amplifier, not a modern firmware-configured drive identified by a v3.1 compatibility designation. Confirm any associated CNC controller or external motion-control software requirements separately.
Q7: What should be inspected before purchasing a used unit?
Check the complete nameplate, serial number, current rating, PCB condition, power connectors, control connector, capacitors, and signs of overheating or previous repair. For a functional test, verify output operation, feedback response, protection behavior, and ballast-circuit performance using an appropriate test setup.
Procurement and Quality-Control Notes
The 60WKS family is legacy motion-control hardware. A replacement should be checked against the installed motor and system configuration rather than selected by current rating alone.
For used or refurbished stock, request:
- Clear photographs of the front label and rear connector area.
- Confirmation of the exact 3 A /3-PB configuration.
- Inspection records for the power stage and DC-link capacitors.
- Functional-test evidence under an appropriate load.
- Verification of feedback and analog command interfaces.
- Confirmation that the unit has no visible signs of overheating or PCB repair damage.
Procurement priority: Specify Kollmorgen 60WKS-, 240 V DC-link, 3 A analog servo amplifier. Do not accept a motor listed under the same model number or a higher-current amplifier without engineering review.
