KOLLMORGEN SERVOSTAR 620-AS Original Industrial Spare SERVOSTAR Compatible

Product Overview

KOLLMORGEN SERVOSTAR 620-AS Original Industrial Spare: System Stability & Maintenance Value

The KOLLMORGEN SERVOSTAR 620-AS is a high-performance digital AC servo drive from the renowned SERVOSTAR series, engineered for precision motion control in demanding industrial automation environments. Whether you are managing a planned maintenance shutdown, responding to an unplanned drive failure, or building a strategic spare parts inventory, the SERVOSTAR 620-AS delivers the reliability and compatibility your production line depends on. Sourced as an original spare, this unit is fully tested prior to shipment and backed by a 12-month warranty, giving procurement engineers and maintenance teams the confidence to act decisively.

In modern manufacturing facilities — from automotive assembly lines to packaging machinery, CNC machining centers, and textile production — servo drive failures represent one of the highest-risk single points of failure. A failed drive can halt an entire production cell within seconds. Holding a verified original SERVOSTAR 620-AS in your on-site spare parts cabinet is one of the most cost-effective insurance policies available to any maintenance manager operating KOLLMORGEN-based motion systems.

Critical Technical Specs

Preventive Maintenance Strategy

Experienced maintenance engineers know that a servo drive rarely fails in isolation. The SERVOSTAR 620-AS operates within a tightly integrated motion control ecosystem, and a comprehensive preventive maintenance program must account for all interdependent components. When scheduling a planned inspection or responding to a SERVOSTAR 620-AS fault, the following associated components should be evaluated simultaneously to prevent repeat failures and maximize system uptime.

Begin with the servo motor feedback cable and power cable — degraded shielding or connector corrosion is a leading cause of encoder errors and drive faults on SERVOSTAR platforms. Inspect the resolver or SinCos encoder cable for continuity and insulation integrity. Next, verify the condition of the 24VDC control power supply feeding the drive’s logic section; voltage ripple or brownouts can trigger spurious faults that are often misdiagnosed as drive failures. If your control cabinet houses multiple SERVOSTAR 600-series axes, check the shared DC bus capacitor bank and regenerative braking resistor for signs of thermal stress or capacitance degradation.

The KOLLMORGEN AKM servo motor paired with the SERVOSTAR 620-AS should be inspected for bearing wear, winding insulation resistance, and brake function during any drive replacement event — replacing the drive without servicing the motor is a common cause of premature re-failure. Similarly, the CANopen or PROFIBUS communication module connecting the drive to the PLC or motion controller should be checked for termination resistance and cable integrity, as communication faults can mimic drive hardware failures.

Within the control cabinet, inspect the 24VDC relay modules and safety relay responsible for the drive’s enable and STO (Safe Torque Off) circuit — a faulty relay can prevent the drive from enabling even after a successful replacement. The terminal block wiring on the I/O connector should be re-torqued and inspected for oxidation, particularly in high-humidity or high-vibration environments. If the system uses an HMI or operator panel for drive parameter monitoring, verify that the communication link is stable and that drive parameters are backed up before any replacement procedure.

For facilities running legacy KOLLMORGEN SERVOSTAR systems, it is strongly advisable to maintain a minimum stock of SERVOSTAR 640-AS or SERVOSTAR 660-AS drives alongside the 620-AS, as these higher-current variants share the same parameter structure and can serve as emergency cross-references in multi-axis systems. Keeping a spare KOLLMORGEN servo motor encoder and a set of fuse modules for the drive input circuit rounds out a robust spare parts strategy for any SERVOSTAR-based production line.

Strategic Replacement Solutions

The SERVOSTAR 620-AS has been a workhorse in industrial motion control for over two decades. Many facilities continue to operate SERVOSTAR 600-series systems well beyond their original design life, and sourcing original replacement drives has become increasingly critical as new production of legacy models winds down. Procuring a verified original SERVOSTAR 620-AS from TOPNLMS ensures that your replacement unit carries the same firmware baseline, parameter compatibility, and electrical characteristics as the unit being replaced — eliminating the risk of re-commissioning failures that are common with counterfeit or refurbished alternatives.

Unlike generic third-party replacements, an original SERVOSTAR 620-AS can be swapped into an existing SERVOSTAR 600-series axis with minimal re-commissioning effort. Drive parameters can be restored from a backup file using KOLLMORGEN’s DriveGUI software, reducing replacement time from hours to minutes. This is particularly valuable in high-throughput production environments where every minute of downtime carries a measurable cost. The drive’s native compatibility with KOLLMORGEN AKM, CD, and S-series servo motors means no motor re-tuning is required in most standard replacement scenarios.

For facilities managing end-of-life SERVOSTAR systems, procuring a small buffer stock of SERVOSTAR 620-AS units now — before availability tightens further — is a sound capital allocation decision. The 12-month warranty provided on every unit shipped from TOPNLMS means your investment is protected from the moment of delivery through your first full maintenance cycle.

Support FAQ

Q1: Is this SERVOSTAR 620-AS an original unit or a refurbished spare?
All SERVOSTAR 620-AS units supplied by TOPNLMS are original industrial spare parts. Each unit undergoes a full functional test prior to shipment. A 12-month warranty is included with every order, covering manufacturing defects and functional failures under normal operating conditions.

Q2: How do I verify compatibility with my existing SERVOSTAR 600-series system?
The SERVOSTAR 620-AS is compatible with all standard SERVOSTAR 600-series installations using resolver, SinCos, TTL, or EnDat feedback. Confirm your motor feedback type and supply voltage (230/400/480 VAC) before ordering. If you require assistance with compatibility verification, contact our technical team with your existing drive nameplate data.

Q3: What is the lead time and how is the unit packaged for shipment?
In-stock units are dispatched within 1–3 business days. Each SERVOSTAR 620-AS is packaged in anti-static protective foam with a rigid outer carton to prevent transit damage. Tracking information is provided upon dispatch. Worldwide shipping is available.

Q4: Can I return the unit if it does not resolve my drive fault?
Yes. TOPNLMS offers a structured returns process for units that do not resolve the reported fault, subject to inspection confirming the unit was not damaged during installation. We recommend performing a parameter backup and reviewing the drive fault history log before replacement to ensure the root cause is correctly identified. Our technical support team is available to assist with pre-replacement diagnostics.