Description
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Product Code | CB06551 |
| Full Model | CB06551 PRD-B040SSIB-63 |
| Manufacturer | Kollmorgen |
| Product Family | ServoStar CD servo amplifier |
| Rated Output Power | 400 W (0.4 kW) |
| Continuous Output Current | 8 A |
| Peak Output Current | 24 A (0.5 s) |
| Main Power Input | 115/230V AC, single- or three-phase, 50/60 Hz |
| Logic Supply | 24V DC, approx. 0.5 A |
| Feedback Types | Resolver and digital encoder (incremental/absolute) |
| Control Modes | Position, speed, torque; ±10V analog, pulse+direction, SERCOS |
| Encoder Output (ENCOUT) | Up to 16384 lines/rev (65536 quadrature counts) |
| Current Loop Response | <50 µs (typical) |
| Protection | Overcurrent, over/under-voltage, overheat, short-circuit, ground fault |
Product Introduction
When a legacy ServoStar CD drive faults out on a running line, the first question is never “what does it do?” — it’s “can I still buy one, and will the replacement talk to my motor?” The CB06551 PRD-B040SSIB-63 is one of those workhorse drives that showed up in packaging machines, web handlers, and small axis positioning systems back when Kollmorgen was still under Danaher. It does not try to be everything. It takes a 115/230V AC supply, drives a Goldline XT or similar Kollmorgen servo motor at up to 8A continuous, and closes the loop on resolver or encoder feedback with a sub-50 µs current loop.
Why keep it in rotation? Because swapping a drive on a 15-year-old machine is cheaper than rewiring the cabinet and re-tuning the whole axis. The 24A peak for 0.5 seconds handles start-up inertia without nuisance tripping, and the ±10V analog command interface means it plays nice with older motion controllers that have no fieldbus. That said — it is discontinued. If you are designing a new axis, go AKD. If you are keeping an old one alive, this part number is the correct drop-in, provided the feedback type matches.
QA/QC Transparency SOP
- Intake & Origin Verification — Confirm full model code CB06551 PRD-B040SSIB-63 (not SSIC variant). Check for burned MOSFETs on the power stage, cracked terminal blocks, and corrosion on the resolver/encoder connector. Verify the label matches the internal board revision.
- Live Functional Testing — Mount in a test rack with a known-good Kollmorgen servo motor (Goldline XT or equivalent). Apply 230V AC main and 24V DC logic. Run in speed mode with a ±10V analog command. Verify smooth rotation across the speed range with no cogging or oscillation.
- Electrical Parameter Tests — Measure phase-to-phase output balance with a Fluke 87V. Check insulation resistance on power terminals (>100 MΩ at 500V DC). Verify 24V DC logic supply draw is within the ~0.5A spec. Confirm peak current capability by commanding a short acceleration burst.
- Firmware/Config Verification — Connect via Kollmorgen Motion Explorer or the appropriate configuration tool. Read back firmware revision and parameter set. Note any custom tuning gains, encoder counts-per-revolution settings, or current limits. Back up the parameter file before shipping.
- Final QC & Packaging — Label with test date, firmware revision, and measured output current balance. Fit connector dust caps on the resolver/encoder port. Ship in ESD bag with foam to protect the front-panel connectors and terminal blocks.
Field Engineer Gotchas
- SSIB vs SSIC Suffix — The PRD-B040SSIB-63 and PRD-B040SSIC-63 are close but not guaranteed identical. The trailing characters can indicate feedback type, firmware variant, or regional certification. Swapping one for the other without checking the resolver/encoder configuration can give you a “feedback loss” fault on power-up. Always compare the nameplate of the failed unit against the replacement.
- Resolver vs Encoder Mismatch — This drive supports both resolver and encoder feedback, but the drive must be configured for the correct type. Installing a drive set for encoder feedback on a resolver motor (or vice versa) will not work — the motor will either not commutate or run erratically. Verify the motor’s feedback device and the drive’s parameter set before energizing.
- Analog Command Offset — The ±10V analog input can drift with age. A 50 mV offset at zero command translates to unwanted creep in speed mode. Fix: Zero the analog offset in the drive parameters, or check the upstream controller’s analog output with a multimeter before blaming the drive.
- Peak Current vs Bus Capacity — The 24A peak for 0.5 seconds is real, but if your AC supply is weak or the bus capacitors are aged, you will see a DC bus undervoltage fault during acceleration. War story: A packaging line kept faulting on “DC Bus Low” every time the axis indexed. The drive was fine — the facility’s 230V supply was sagging to 190V under load. A line reactor and bus capacitor check solved it.
- Discontinued Part Trap — Surplus sellers often list “CB06551” without the full PRD suffix. You might receive a different current rating or feedback option. Never buy on the CB06551 code alone. Demand the full PRD-B040SSIB-63 label photo before payment.
KOLLMORGEN CB06551 PRD-B040SSIB-63
Application Scenarios
- Packaging machine indexing axis — A pick-and-place arm on a carton former uses a Goldline XT motor driven by the . The 8A continuous current handles repeated start-stop cycles, and the ±10V command comes from a legacy indexer card.
- Web tension control — A dancer arm position is read by a potentiometer, converted to ±10V, and fed to the drive in torque mode. The fast current loop (<50 µs) keeps tension stable during web acceleration.
- Small CNC auxiliary axis — A tool changer or door actuator on an older CNC uses the in position mode with pulse+direction command. Resolver feedback provides reliable commutation even in electrically noisy environments.
FAQ
A: No. The ServoStar CD series is discontinued. Kollmorgen’s current recommendation is the AKD series (e.g., AKD-B00606 for comparable 6A continuous class). Surplus and refurbished units are the primary source.
Q: Can I replace it with a PRD-B040SSIC-63?
A: Possibly, but not blindly. The SSIB and SSIC variants may differ in feedback type, firmware, or certification. Compare the nameplate and the drive’s parameter set before installing. If the feedback type differs, you will need to reconfigure or re-cable.
Q: What motor does this drive?
A: Kollmorgen AC servo motors, typically Goldline XT and similar permanent-magnet synchronous motors. Verify the motor’s continuous current is ≤8A and peak current is within the drive’s 24A/0.5s capability.
Q: Does it support fieldbus communication?
A: The ServoStar CD supports SERCOS for motion bus applications. It does not natively support EtherCAT, PROFINET, or EtherNet/IP — those are AKD-era features. For analog or pulse+direction control, no fieldbus is needed.
Q: Can I run it on 120V single-phase?
A: Yes. The input is 115/230V AC, single- or three-phase. On 115V single-phase, available output power will be reduced. Verify the motor’s current demand does not exceed the derated capability.
Q: What software do I use to configure it?
A: Kollmorgen Motion Explorer or the configuration tool specified in the ServoStar CD manual. Parameter backup is strongly recommended before any drive swap.
Q: Is there a direct AKD cross-reference?
A: The AKD-B00606 (6A continuous, 18A peak) is the commonly cited upgrade for the 400W/8A class, but it is not a pin-for-pin replacement. Cabinet wiring, connectors, and motor cabling will likely need modification. Plan for a retrofit, not a drop-in.
