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Phone: +86 16626708626Description
3. Key Technical Specifications
- Model: D900.51
- Additional Reference: T145707
- Manufacturer: Berger Lahr
- Type: 3-phase stepper motor drive / circuit board
- Typical Power Stage: 130 VDC class (ratings such as 4 A or similar variants exist)
- Signal Input: 5 V logic level
- Motor Compatibility: Berger Lahr 3-phase stepper motors (e.g., VRDM series)
- Form Factor: Plug-in / rack or chassis-mounted drive card
- Application: Precision positioning and motion control in industrial machines
Note: Exact current rating, revision (e.g., Rev. 06/07), and connector configuration can vary. Always verify the label on the existing unit.
4. Product Introduction
The Berger Lahr D900.51 (referenced as T145707 on some boards) is a 3-phase stepper motor drive card used to control Berger Lahr stepper motors in industrial automation and machinery. It provides the power stage and control electronics needed for precise positioning applications.
These drives are commonly found in older or specialized machines that use Berger Lahr (later Positec) motion components. Maintenance teams replace the D900.51 when the original drive fails or when restoring a machine to operation. Available units are typically New Surplus, refurbished, or residual stock.
5. Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to this Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| Motor does not move | Power, enable, or signal issue | ✅ High | Check DC bus voltage and control signals | Verify power supply and input commands |
| Erratic or lost steps | Tuning, wiring, or drive fault | ✅ High | Inspect motor wiring and feedback if used | Check connections and drive status |
| Drive overheats or trips | Overload or cooling problem | ✅ High | Monitor current and temperature | Reduce load or improve ventilation |
| No status / dead board | Internal failure or power loss | ✅ High | Measure supply voltages on the board | Replace if power rails are missing |
| Intermittent operation | Poor connection or aging components | ✅ Medium | Reseat board and inspect connectors | Clean contacts or replace board |
If the issue persists, record the exact revision number, any LED status, and motor type before contacting support.
D900.51 T145707
D900.51 T145707
6. Frequently Asked Questions (FAQ)
Q: What motors does the D900.51 drive?
A: It is designed for Berger Lahr 3-phase stepper motors, such as certain VRDM series motors. Confirm motor voltage and current ratings match the drive.
Q: Is the D900.51 still in production?
A: It is a legacy product. Berger Lahr motion products are now under Schneider Electric / Positec. Current availability is mainly New Surplus or refurbished units.
Q: What does the T145707 reference mean?
A: T145707 is a secondary identifier or internal board number often marked on the D900.51 circuit board. The primary model remains .51.
Q: Can I replace it with a modern stepper drive?
A: In some cases yes, but the replacement must match the motor type (3-phase), voltage, current, and control interface. Mechanical mounting and connectors may also differ.
Q: Why is pricing variable for this part?
A: As a discontinued specialty drive card, pricing depends on condition (new surplus, refurbished, or used) and remaining stock levels.
Q: What should I check before ordering a replacement?
A: Note the full model number, revision, and any additional codes on the existing board. Also record the motor type and machine application for compatibility confirmation.
Q: What warranty is typically offered?
A: Industrial suppliers commonly offer a limited warranty (often 12 months) on tested units. Confirm terms with the specific seller.
