Kollmorgen SERVOSTAR 603 Retrofit-Compatible Servo Drive for Legacy Systems

Kollmorgen SERVOSTAR 603 Retrofit-Compatible Servo Drive for Legacy Systems

The Kollmorgen SERVOSTAR 603 is a high-performance digital servo drive engineered for precision motion control in demanding industrial automation environments. As legacy ServoStar series installations age and original spare parts become increasingly scarce, the SERVOSTAR 603 remains one of the most sought-after retrofit-compatible units for engineers tasked with modernizing aging control architectures without full system replacement. NINERMAS maintains verified stock of the SERVOSTAR 603 with a 12-month warranty, supporting customers across manufacturing, packaging, semiconductor, and machine tool industries who require a reliable, drop-in compatible solution for their existing servo systems.

Whether you are managing a planned upgrade cycle or responding to an unplanned drive failure on a production line, the SERVOSTAR 603 provides a technically sound path forward. Its compatibility with the broader Kollmorgen ServoStar platform — including the SERVOSTAR 601, SERVOSTAR 606, SERVOSTAR 610, and SERVOSTAR 620 — means that engineers familiar with the existing system architecture can execute a replacement with minimal retraining and reduced commissioning risk. The drive supports standard RS-232 and CANopen communication interfaces, making it compatible with a wide range of legacy PLCs, motion controllers, and HMI systems already deployed on the plant floor.

Upgrade Compatibility Table

Retrofit Planning for Existing Automation Systems

Successful integration of the SERVOSTAR 603 into an existing automation system begins well before the physical swap. Engineers should start by auditing the full drive cabinet layout, including the power supply module, regenerative braking resistor, and any shared DC bus components. In many ServoStar-era installations, the cabinet also houses a Kollmorgen AKD or older S300 series drive alongside the SERVOSTAR units, and understanding the shared power architecture is critical to avoiding inrush current issues during restart.

Terminal wiring is one of the most common sources of commissioning delay during a retrofit. The SERVOSTAR 603 uses a clearly documented terminal block layout, but older installations may have non-standard wiring practices or field modifications that deviate from the original schematic. Before disconnecting the failed drive, photograph all terminal connections and cross-reference against the original wiring diagram. Pay particular attention to the enable signal circuit, the fault relay output, and any hardware limit switch inputs wired into the drive’s I/O connector.

For systems using CANopen communication, the node address and baud rate settings stored in the original drive must be replicated exactly on the replacement unit. If the host controller is a Kollmorgen AKD PDMM, a Beckhoff CX series controller, or a Siemens S7-300 with a CP 342-5 CANopen master module, the network configuration file should be exported before the failed drive is removed. This ensures that the replacement SERVOSTAR 603 can be assigned the correct node ID and integrated into the existing motion program without modifying the PLC project.

In applications where the SERVOSTAR 603 interfaces with a legacy HMI — such as a Kollmorgen MMI panel or a third-party operator terminal running on RS-232 — the communication parameters (baud rate, parity, stop bits) must be verified and matched on the replacement drive. HMI screen variables mapped to drive status registers should be tested individually after commissioning to confirm that all display values and alarm indicators are functioning correctly.

I/O expansion is another consideration in multi-axis retrofit projects. If the existing system uses a shared I/O rack — for example, a Wago 750 series or Phoenix Contact Inline I/O system — connected to the servo drive via a fieldbus coupler, the I/O mapping must be preserved during the drive replacement. Any changes to the drive’s fieldbus address or process data object (PDO) configuration will require corresponding updates in the PLC program and should be tested in simulation mode before live commissioning.

For installations where the SERVOSTAR 603 is paired with a Kollmorgen servo motor from the AKM or RBE series, the motor data set (motor file) must be loaded into the replacement drive using WorkBench software. NINERMAS recommends that customers retain a copy of the original motor configuration file as part of their spare parts documentation package. If the original file is unavailable, the motor parameters can be re-entered manually from the motor nameplate and datasheet, though this process requires additional commissioning time and should be factored into the planned maintenance window.

Downtime Control During System Migration

Minimizing production downtime during a SERVOSTAR 603 replacement requires a structured approach that begins with pre-staging the replacement unit before the maintenance window opens. NINERMAS ships all units with a pre-delivery inspection report, and customers are encouraged to perform a bench-level power-on test using a compatible 24 VDC logic supply before the scheduled installation date. This confirms that the drive powers up correctly, displays no fault codes, and accepts communication from the configuration software — eliminating the risk of discovering a transit-related issue during a live maintenance window.

Parameter backup is non-negotiable. If the original SERVOSTAR 603 is still partially functional, connect a laptop running DRIVE.EXE or WorkBench and export the full parameter set to a local file. This file contains all tuning gains, current limits, velocity loop parameters, position window settings, and I/O assignments. Restoring this file to the replacement drive eliminates the need for re-tuning and dramatically reduces commissioning time — in most cases, the axis can be returned to automatic operation within the same shift.

For multi-axis systems where the SERVOSTAR 603 operates as part of a coordinated motion sequence — for example, in a gantry, winding, or pick-and-place application — it is advisable to disable the affected axis in the PLC program and run the remaining axes in a degraded mode while the replacement is performed. This approach maintains partial production throughput and avoids a full line shutdown. Once the replacement drive is commissioned and the axis is re-enabled, a short test cycle should be run at reduced speed before returning to full production rate.

NINERMAS maintains ready stock of the SERVOSTAR 603 and can support same-day or next-day dispatch for urgent breakdown situations. All units are covered by a 12-month warranty from the date of delivery, and our technical team is available to assist with parameter configuration, wiring verification, and commissioning support via email or phone.

Retrofit Support FAQ

Q1: Is the SERVOSTAR 603 a direct drop-in replacement for the SERVOSTAR 601 or SERVOSTAR 606?
The SERVOSTAR 603 shares the same platform architecture as the SERVOSTAR 601 and SERVOSTAR 606, but the current rating differs. The 603 is rated at 3 A continuous output. Before substituting, verify that the motor’s continuous current demand does not exceed this rating. Terminal pinout and communication interface are compatible across the ServoStar range, so wiring changes are typically not required.

Q2: Can I restore my original parameter file to the replacement SERVOSTAR 603?
Yes. Parameter files saved from any SERVOSTAR 600 series drive using DRIVE.EXE or WorkBench software are compatible with the SERVOSTAR 603. NINERMAS recommends backing up the parameter file from the original drive before removal. If the original drive has failed completely and no backup exists, our technical team can assist with reconstructing the parameter set from the motor datasheet and application specifications.

Q3: What commissioning steps are required after installing the replacement drive?
After physical installation and wiring verification, connect the drive to a laptop via RS-232 and load the saved parameter file using WorkBench. Confirm the motor feedback type and resolution settings, verify the CANopen node address if applicable, and perform a low-speed jog test to confirm correct motor rotation direction and encoder feedback polarity. Check all I/O signals — enable, fault reset, limit switches — before enabling the axis in automatic mode.

Q4: What does the 12-month warranty from NINERMAS cover?
All SERVOSTAR 603 units supplied by NINERMAS are covered by a 12-month warranty from the date of delivery. The warranty covers manufacturing defects and functional failures under normal operating conditions. Each unit undergoes a pre-shipment functional test. In the event of a warranty claim, NINERMAS will arrange for unit replacement or repair. Contact sale@ninermas.com or call +0086 187 5021 5667 to initiate a warranty claim.