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Servo Drive Accessories

Servo drive accessories include the encoder cables, power cables, braking resistors, and signal connection hardware that link servo drives to motors, feedback devices, and control systems. PLC Direct supplies servo drive accessories from leading automation manufacturers as surplus, sealed, refurbished, and used hardware, supporting the replacement and maintenance of installed servo drive systems when a failed or damaged cable or accessory causes an axis outage rather than the drive or motor itself.

Where Are Servo Drive Accessories Used in Industrial Environments?

Servo drive accessories are installed wherever servo drives and motors are in service, providing the mechanical and electrical connections between drive, motor, encoder, and control system that the axis depends on to function. Encoder cables, servo power cables, and braking resistors are consumable elements of a servo installation that wear or fail independently of the drive and motor.

Facilities and operations that depend on servo drive accessories include:

CNC machine tool installations where SINAMICS DRIVE-CLiQ signal cables and MOTION-CONNECT power cables connect S120 Motor Modules to servo motors on each controlled axis.

Packaging and filling lines where servo motor cables in cable drag chains are subject to flexing cycles that cause conductor fatigue and intermittent encoder faults over time.

Automotive and metal fabrication plants where braking resistors dissipate regenerative energy on high-inertia press and transfer axes during rapid deceleration cycles.

Printing and converting operations in which encoder cables carry feedback signals between Yaskawa Sigma series motors and SERVOPACKs on the tension and registration axes.

Multi-axis machine tools and assembly systems where DRIVE-CLiQ servo drive cables daisy-chain Motor Modules, encoders, and the Control Unit within SINAMICS S120 architectures.

When a servo drive cable or accessory fails, replacing it by exact part number is the fastest resolution, since mismatched cable types can cause encoder communication errors or prevent the axis from commissioning.

Which Brands of Servo Drive Accessories Does PLC Direct Stock?

PLC Direct stocks servo drive accessories from major automation manufacturers.

Siemens MOTION-CONNECT 500 and 800PLUS Cables: Pre-assembled DRIVE-CLiQ signal cables (6FX5002-2DC10 series) and power cables (6FX8002 series) for SINAMICS S120 Motor Modules and SIMOTICS servo motors, available across multiple lengths.

Yaskawa JZSP Series Encoder and Power Cables: Encoder cables and power/brake cables for Sigma-5 and Sigma-7 SERVOPACKs and servo motors, including flexible absolute encoder cables and motor power cables, available across multiple lengths; LKEB series braking resistor units for Yaskawa drives are also available.

Lenze Series 9400 Diagnostic Accessories: A USB diagnostic adapter for Lenze 9400 Series servo drives is used for parameterization and diagnostics via PC on installed Lenze servo systems.

All servo drive accessories at PLC Direct are available as surplus sealed, refurbished, and used, depending on current inventory.

What Should You Know Before Ordering Servo Drive Accessories?

Hardware condition options: PLC Direct supplies servo drive accessories as surplus sealed, refurbished, and used hardware. Surplus sealed cables and accessories are factory-sealed stock in original packaging; used hardware is inspected prior to listing and carries the same 1-year PLC Direct warranty as all other condition grades.

Compatibility and part identification: Servo motor cables and encoder cables are matched to specific drive and motor families by connector type, cable cross-section, shielding specification, and length; the part number suffix encodes the cable length and connector variant, so the replacement must match the failed cable's full part number. For DRIVE-CLiQ cables and MOTION-CONNECT assemblies, the cable type determines which SINAMICS topology it supports; substituting an incorrect type prevents the drive from recognizing the connected component.

Warranty: All servo drive accessories hardware purchased from PLC Direct carries a standard 1-year warranty covering defects and functionality, applicable to surplus sealed, refurbished, and used products.

PLC Direct supplies servo drive accessories and hardware for replacement and maintenance purposes and does not provide system design, programming, or integration services.

Frequently Asked Questions

DRIVE-CLiQ is Siemens' proprietary serial interface used in SINAMICS S120 systems to communicate between the Control Unit, Motor Modules, encoders, and other system components over a single cable. The cable variant determines the connector IP rating, shielding class, and length, and using an incompatible type can prevent the SINAMICS system from detecting the connected component during startup.

The most common failure modes are conductor fatigue from repeated flexing in cable drag chains, connector pin damage from vibration or incorrect mating, and shielding breakdown that introduces signal noise into the encoder feedback. Cables in dynamic applications, such as drag chains, have a finite flex cycle rating, and scheduled replacement before failure is standard practice in high-cycle servo installations.

A braking resistor is required when the regenerative energy generated during motor deceleration exceeds the drive's internal dissipation capacity, which is most common in high-inertia or high-cycle applications such as press drives, hoists, and fast-indexing axes. Undersizing or omitting a required braking resistor typically causes the drive to trip on DC bus overvoltage during deceleration.

Pre-assembled servo cables from manufacturers such as Siemens and Yaskawa are engineered with specific shielding termination, connector crimping, and cable routing that is difficult to replicate correctly in the field. Re-terminating a servo cable on site risks introducing signal degradation or impedance mismatches that cause intermittent encoder faults, and sourcing the correct pre-assembled replacement by part number is the recommended approach.

The drive manufacturer, drive family, motor family, encoder type (incremental or absolute), cable length, and connector configuration are all required to identify the correct replacement. For Yaskawa Sigma series systems, the JZSP part number from the installed cable encodes all of these parameters; for Siemens SINAMICS systems, the 6FX-series part number identifies the cable type, connector IP rating, and length.