Seidel MV65WKS-CE310/22PB | New Surplus Servo Drive

Description

Product Overview

The Seidel MV65WKS-CE310/22PB is a legacy high-power servo amplifier from the Seidel 65WKS family. Available equipment records identify the unit as a 22 A servo drive for 220 VAC three-phase operation, with an approximately 5.9 kVA power rating. The exact reference is also cataloged as MV65WKSCE31022PB, with the slash omitted in the alternative part-number format.

In an installed machine, Seidel MV65WKS-CE310/22PB sits between the machine’s incoming power/control architecture and the servo motor. Its job is not simply to switch motor power; the amplifier forms the controlled power stage required for closed-loop motion. The CE310 designation is associated in available technical references with the 310 VDC DC-link architecture, while the 22PB configuration is identified with the 22 A class.

The Seidel MV65WKS-CE310/22PB is particularly relevant when maintaining older machine tools and motion-control equipment where replacing the complete drive system would require substantial mechanical and electrical redesign. The public technical record is not perfectly consistent, however. One source describes the unit as a 22 A, 220 VAC, three-phase, 5.9 kVA servo drive, while another provides a more detailed 310 VDC architecture. For procurement, the original nameplate, motor data, feedback type, cabinet wiring, and drive configuration should take priority over generic catalog specifications.

Product Introduction

A failed legacy servo amplifier can stop a production axis even when the PLC and motor remain fully operational. Seidel MV65WKS-CE310/22PB is a 22 A-class servo drive intended for controlled operation of compatible motion axes, with published equipment data identifying a 220 VAC three-phase supply and 5.9 kVA rating.

The 65WKS architecture is an older motion-control platform, so a legacy servo drive replacement requires more than matching current capacity. Motor winding, feedback, command interface, DC-link arrangement, and cabinet configuration should all be checked before energizing the replacement.

Key Technical Specifications

The 220 VAC three-phase, 22 A, and 5.9 kVA figures are directly reported by equipment catalogs for this exact reference. The 310 VDC architecture and analog command/feedback details appear in secondary technical references and should be verified against the physical drive documentation before being used as contractual specifications.

Related Products

• 65WKS-M310/12 — Lower-current member of the 65WKS family. It can suit smaller motor loads but is not a 22 A substitute without confirming the machine’s torque/current requirements.
• 65WKS-M310/6 — Lower-current 65WKS configuration intended for smaller servo applications. Its current capacity is substantially below the MV65WKS-CE310/22PB.
• 65WKS-M310/3 — Lower-output member of the same 310 VDC-oriented family. Useful for small-axis applications rather than high-current motion axes.
• 65WKS-M310/26 — Higher-current related configuration reported in the same 65WKS family. It may provide greater current capacity, but motor and machine compatibility still have to be established.
• 60WKS-M240/03-PB — Related Seidel WKS-family servo hardware with a different voltage/current configuration. It should not be treated as a direct substitute.
• 60WKS-M240/22-PB — Higher-current 60WKS variant. The different DC-link architecture makes direct substitution inappropriate without engineering verification.
• 6SM Series Servo Motors — Seidel/Kollmorgen motor family associated with legacy WKS motion systems. Motor winding and feedback characteristics must match the amplifier.
• K1.1-LR65WK5MB — Related rack/power-supply hardware listed with the 65WKS family. It supports the larger drive architecture rather than replacing the servo amplifier itself.

/22PB

Frequently Asked Questions

What is Seidel /22PB used for?

The /22PB is a 22 A servo drive/servo amplifier used for closed-loop industrial motion control. Available equipment documentation identifies it as a 220 VAC, three-phase, 5.9 kVA drive.

It is intended to control compatible servo motors rather than function as a PLC or general-purpose motor starter.

What does “22PB” mean on /22PB?

The available technical references associate the 22 designation with the 22 A current class.

The exact meaning of every suffix character should still be confirmed against the Seidel documentation for the specific hardware revision. Do not assume that another 65WKS unit with a similar-looking suffix has identical motor or feedback characteristics.

/22PB a 220 VAC servo drive?

Yes. Equipment catalogs specifically identify the exact model as a 220 VAC, three-phase, 22 A servo drive, with a reported 5.9 kVA rating.

The internal architecture is associated with an approximately 310 VDC DC link.

Can I rep/22PB with a 65WKS-M310/12?

Not as a direct replacement.

The 65WKS-M310/12 belongs to the same family but has a substantially lower current rating.

Before considering it, compare:

• Motor rated current
• Peak torque requirement
• Acceleration profile
• DC-link configuration
• Feedback device
• Command interface
• Existing cabinet wiring
• Machine-axis parameters

A lower-current amplifier can produce an apparently correct startup while failing when the axis reaches its normal acceleration or load condition.

Can I hot-swap/22PB?

No. Do not assume hot-swap capability.

This is a power servo amplifier connected to three-phase supply and motor power. Replacement should be performed with the machine isolated and the drive’s stored electrical energy discharged according to the applicable maintenance procedure.

After installation, check motor feedback and command polarity before enabling the axis.

Does replacing the drive erase my motion program?

The drive itself is primarily a power amplification and servo-control component. Machine motion sequences may reside in a separate CNC, PLC, motion controller, or supervisory controller depending on the machine architecture.

Still, replacing the amplifier can require restoration of drive-specific parameters such as:

• Current limits
• Velocity-loop settings
• Feedback scaling
• Motor data
• Command scaling
• Enable logic
• Fault thresholds

Document the original configuration before removal whenever the existing drive can still be interrogated.

/22PB support firmware v3.1?

Do not use a generic firmware number to establish compatibility for this legacy drive.

The 65WKS platform predates many modern digitally configured servo-drive architectures. Compatibility is more likely to depend on the exact hardware revision, motor/feedback arrangement, command interface, and surrounding controller.

If a replacement unit carries a different PCB or hardware revision, compare the nameplate and internal configuration before installation.

How should I verify a New Sur/22PB?

For an old high-power servo amplifier, a basic power-on test is insufficient.

I would request:

• Exact nameplate photograph
• Complete /22PB marking
• Serial number
• Hardware revision
• Inspection of power semiconductors
• DC-bus capacitor inspection
• Cooling-path inspection
• Control-input test
• Feedback-input test
• Output-stage test
• Fault/alarm verification
• Motor simulation or controlled motor test
• Measured current/voltage data
• Final functional-test report

There is also an important identification issue: the exact part is consistently identified as Seidel, while some current references associate the legacy Seidel 65WKS family with Kollmorgen. For purchasing purposes, the safest identifier remains the comp/22PB part number and the original nameplate, not a modern brand-family assumption.