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Key Technical Specifications
| Parameter | Specification Value |
| Model / Part Number | PRD-P310250E-55 (CP310250) |
| Manufacturer | Kollmorgen / Danaher Motion |
| Drive Family | PRD Industrial Servo Drive Series |
| Control Architecture | Digital DSP-based closed-loop servo controller |
| Control Modes | Position, Velocity, and Torque (Current) Control |
| Feedback Supported | Quadrature Encoder, Resolver, or Absolute Encoder options |
| Communication / Bus | Industrial Fieldbus / Serial Communication options |
| Mounting Style | Vertical Panel Mount / Cabinet Sub-rack |
| Cooling | Forced Air / Onboard Cooling Fan |
Product Introduction
The Kollmorgen PRD-P310250E-55 is a high-performance digital servo drive engineered for demanding industrial motion control applications. Built on Kollmorgen’s robust PRD drive architecture, this unit provides precise closed-loop control over speed, torque, and position for high-dynamic AC brushless servo motors.
Designed for demanding factory environments, the PRD-P310250E-55 features DSP-based control loops that ensure rapid response times, minimal positioning error, and smooth low-speed motor operation. It is widely used in CNC machining, automated packaging systems, robotics, printing presses, and specialized material handling machinery.
Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to Part | Quick Check Method | Recommendation |
| Drive Status LED Off | Missing logic power or blown internal DC bus fuse | ✅ High | Check main line power and auxiliary 24V DC logic supply voltage. | Verify input mains voltage; if power is present but drive remains dead, replace internal power stage or drive unit. |
| Fault Code: Overcurrent | Short circuit in motor phases or damaged power IPM | ✅ High | Disconnect motor cables and check resistance across U, V, W output terminals. | Inspect motor wiring for ground faults; if drive trips immediately on enable with motor disconnected, replace drive. |
| Encoder / Feedback Fault | Loose feedback cable or shield interference | ❓ Medium | Inspect encoder cable wiring and check shield ground continuity. | Use double-shielded twisted-pair encoder feedback cabling and secure DB/HD connectors. |
| Bus Overvoltage Fault | Excessive regenerative energy during rapid deceleration | ❓ Medium | Measure DC bus voltage during deceleration or check external braking resistor connections. | Install or replace external dynamic braking resistor; increase deceleration ramp time in control profile. |
PRD-P310250E-55
PRD-P310250E-55
Frequently Asked Questions (FAQ)
Q: What brand manufactures the PRD-P310250E-55?
A: The PRD-P310250E-55 is manufactured by Kollmorgen (historically part of Danaher Motion / Pacific Scientific).
Q: Is the PRD-P310250E-55 still in active production?
A: This series is largely a legacy product family. However, fully tested New Surplus and Refurbished units are maintained in stock to support active industrial machinery and avoid costly system retrofits.
Q: Do I need software to parameterize a replacement PRD drive?
A: Yes. Replacing a drive usually requires downloading parameter files (motor profiles, gain tuning, and loop configurations) from Kollmorgen’s drive setup software into the new module.
SOP Quality Control Process
- Visual & Mechanical Inspection: Check aluminum heatsink fins, housing structural integrity, control terminal blocks, and backplane connectors.
- DC Bus & Power Stage Check: Perform static diode and transistor resistance checks on input rectifiers and output IGBT modules.
- Bench & Closed-Loop Motor Testing: Connect unit to a Kollmorgen test bench; power up and execute closed-loop motion routines (position, velocity, torque) with a matched AC servo motor.
- Thermal & Load Burn-In: Run drive under load in a temperature-controlled environment to confirm stability and fan operation.
- ESD Packaging: Clean, treat with anti-static solution, and seal inside a heavy-duty ESD vacuum bag with custom foam packaging.
Technical Pitfall & Survival Guide
- ❗ Parameter Matching Before Power-Up: Do not enable a newly installed drive with default settings on a live machine. Always back up parameters from the old unit and flash them to the replacement drive to prevent runaway motor conditions.
- ❗ Regenerative Energy Hazards: High-inertia loads dumping energy back into the drive during sudden stops can ruin the internal DC bus capacitors if an external braking resistor is disconnected or improperly sized.
- ❗ Proper Cable Shielding: Servo feedback lines are extremely sensitive to high-frequency PWM switching noise. Always ground feedback cable shields 360 degrees at the drive enclosure to avoid random position tracking faults.
