Kollmorgen CB06551 Servostar CD Brushless Servo Drive

Description

Product Introduction & Engineering Value

A servo drive that will not hold position can turn a precision machine into a scrap producer. The CB06551 is built for legacy Kollmorgen motion systems where the drive must close high-bandwidth current loops, commutate a brushless motor correctly, and communicate over SERCOS without redesigning the control architecture.

It accepts 115/230 VAC supply power and provides a sinusoidal PWM output for matched Kollmorgen brushless servo motors. The drive supports digital current-loop control, filtering, fault diagnostics, and SERCOS or RS-232 communication depending on the exact hardware option.

Technical Specifications

• Manufacturer series: Kollmorgen Servostar CD.
• Drive type: Single-axis digital brushless AC servo drive.
• Input voltage: 115/230 VAC, 50/60 Hz; single- or three-phase operation.
• Input current: Approximately 10 A per phase at 115 VAC or 7.8 A per phase at 230 VAC.
• Continuous output current: 6 A RMS.
• Output capacity: Approximately 1.4–2.2 kVA continuous and 3.5 kVA peak.
• Output waveform: Sinusoidal PWM current output.
• Feedback compatibility: SinCos encoder, resolver, and Goldline motor feedback systems.
• Communication: RS-232 and SERCOS interface options, hardware dependent.
• Control functions: Digital current-loop control, auto-tuning, first- and second-order low-pass filtering, and pole-placement control methods.
• Position-loop update rate: 500 microseconds, equivalent to 2 kHz.
• Protection and diagnostics: Operating-voltage monitoring, output-stage temperature monitoring, fault flags, and onboard fault diagnostics.
• Installation: IP00 module intended for cabinet mounting; vertical installation and clearance from adjacent units are recommended.

CB06551

CB06551

Field Application & The “Trench” Experience

A retrofit crew was called to a legacy machining cell after its Kollmorgen servo axis began intermittently losing commutation and throwing feedback faults. The machine used a Goldline motor with SinCos feedback and a SERCOS-based motion controller. Rather than replace the controller, the technician matched the failed CB06551 with a verified Servostar CD replacement, confirmed the feedback cable shielding and motor phase sequence, then reloaded the drive configuration. The axis regained stable commutation and position holding without altering the SERCOS topology.

Typical applications include:

• CNC machine-tool servo feed and auxiliary axes
• Precision positioning tables and rotary indexing systems
• Goldline brushless motor retrofits in legacy motion-control cabinets
• SERCOS-based multi-axis machinery requiring a compact Servostar CD amplifier

Transparency SOP: QA & Testing

1. Identity verification: Confirm CB06551 marking, Servostar CD family, voltage class, feedback option, and communication hardware.
2. Visual inspection: Inspect heatsink, power terminals, feedback and communication connectors, capacitors, and PCB for overheating, corrosion, or prior repair damage.
3. Static checks: Measure motor-output phase resistance and check for shorts, abnormal insulation resistance, or damaged power circuitry.
4. Controlled power-up: Apply the correct 115/230 VAC supply and monitor DC bus charging, status indicators, and fault behavior.
5. Feedback and communication test: Verify SinCos/resolver feedback response and SERCOS or RS-232 communication where test equipment permits.
6. Motion verification: Exercise the drive with a compatible Kollmorgen motor or approved load to confirm commutation, current regulation, and fault-free operation.
7. Documentation: Record firmware/configuration, test readings, condition grade, and any replaced components for traceability.

The Veteran’s Tech Trap Guide

⚠️ Confirm the feedback type before ordering. The CB06551 may be configured for SinCos encoder, resolver, or Goldline feedback systems. A drive with the wrong feedback interface will not commutate the motor correctly, even if the power rating appears compatible.

⚠️ SERCOS support is hardware dependent. Not every CB06551 has the same communication option; verify whether the failed unit uses RS-232, SERCOS, or another interface before substituting.

PRO TIP: Check the motor power cable, feedback shield, and earth bonding before condemning the drive. On older Servostar systems, noisy feedback lines and poor shielding often cause position errors that resemble drive failure.

⚠️ Respect DC-bus discharge time. Wait for the bus capacitors to discharge before touching power terminals; Servostar drives can retain hazardous voltage after input power is removed.

Dynamic FAQ

What motor type does the CB06551 drive?
It drives matched Kollmorgen brushless AC servo motors, including Goldline-family feedback configurations where the drive hardware supports them.

What is its continuous current rating?
The CB06551 is rated for approximately 6 A RMS continuous output current.

Does it support SERCOS?
Yes, SERCOS is available depending on the specific hardware configuration; RS-232 is also referenced as a communication option.

What feedback options are compatible?
Available references identify SinCos encoder, resolver, and Goldline motor feedback compatibility.

Is the CB06551 discontinued?
It is a legacy Kollmorgen Servostar CD drive and is typically sourced as New Surplus, refurbished, repaired, or service-exchange inventory.

What warranty is provided?
New Surplus and refurbished units include a defined replacement warranty; the exact term depends on condition grade and is stated on the quotation and packing documentation.