Description
Core Product Summary
The Berger Lahr D900.51 T145707 is a high-performance, 3-phase stepper motor power drive unit designed for precision speed and positioning control in industrial automation machinery. Operating with an intermediate DC bus voltage rating of up to 130 V DC and delivering a 4.0 A phase current output, the module converts standard 5 V logic step/direction control signals into high-torque actuation for 3-phase stepping motors.
Engineered to integrate into multi-axis motion architectures, the D900.51 drive provides smooth phase-current control to minimize resonance and vibration during high-speed stepping operations. Its compact panel-mount enclosure integrates power stage electronics and control terminal interfaces, facilitating installation in control cabinets across SMT placement systems, CNC machinery, robotics, and industrial handling equipment.
Key Technical Specifications
| Parameter | Specification Details |
| Manufacturer | Berger Lahr (Schneider Electric / Positec) |
| Model / Order Code | D900.51 T145707 |
| Product Category | 3-Phase Stepper Motor Drive Unit |
| Motor Compatibility | 3-phase stepping motors |
| Bus Operating Voltage | Nominal 130 V DC |
| Max Output Current | 4.0 A per phase |
| Control Signal Logic Level | 5 V DC signal input (Pulse / Direction logic interface) |
| Cooling Method | Panel-mounted heat sink / natural convection |
| Enclosure Dimensions (H × W × D) | Approx. 210 mm × 150 mm × 65 mm (8.27 in × 5.91 in × 2.56 in) |
Detailed Product Overview
The Berger Lahr D900.51 T145707 stepper drive provides power amplification and phase commutation for 3-phase stepping motors operating within high-speed industrial positioning axes. By controlling current waveforms across the three motor windings, the drive achieves stable torque delivery across wide speed ranges while reducing mid-range resonance typical in traditional two-phase stepper configurations.
In system integration, the D900.51 unit accepts low-voltage 5 V DC digital control commands (such as step pulse and direction signals) from an upstream programmable logic controller (PLC), motion card, or dedicated indexing controller. The internal power stage modulates the 130 V DC power rail to regulate output current up to 4.0 A per phase, maintaining motor holding torque and dynamic response under varying load conditions.
The physical unit is enclosed in a metallic chassis designed for vertical panel mounting within an industrial enclosure. External wiring is connected through front and side terminal strips, maintaining clear separation between high-voltage DC power lines, motor phase leads, and sensitive 5 V control logic inputs.
D900.51 T145707
D900.51 T145707
Dimensions, Mounting & Connection Notes
- Enclosure Footprint: Outer housing dimensions measure approximately 210 mm high × 150 mm wide × 65 mm deep (8.27 in × 5.91 in × 2.56 in).
- Mounting Orientation: Panel-mount format using screw-fastened side/rear flange tabs. Vertical mounting is recommended to optimize convective airflow across the power stage heat sink.
- Electrical Terminals: Dedicated connection blocks separate the 130 V DC bus feed, 3-phase motor output leads (U, V, W), and low-voltage 5 V signal logic lines.
- Wiring Practice: Shielded twisted-pair cables should be used for step/direction signal lines to prevent electromagnetic interference from the high-voltage motor output cables.
System Compatibility & Integration Requirements
| Item / Dependency | Verified Compatibility or Requirement | Practical Note |
| Motor Compatibility | 3-phase stepping motors rated up to 4.0 A phase current | Ensure motor coil inductance and current settings align with drive output limits. |
| Power Supply Requirement | 130 V DC main power supply rail | Must be fed from an appropriately fused and regulated DC bus power supply. |
| Controller Interface | 5 V DC Pulse / Direction or Clock signal inputs | Logic signals from host PLC/controller must conform to 5 V signal voltage standards. |
| Cabinet Installation | Vertical mounting on conductive metal panel | Adequate thermal clearance must be provided above and below heat sink fins. |
FAQ
What type of device is the Berger Lahr D900.51 T145707?
It is a 3-phase stepping motor power drive module designed to control 3-phase industrial stepper motors.
What power voltage and current ratings apply to the D900.51?
The unit operates on an intermediate bus voltage of 130 V DC and delivers an output current rating up to 4.0 A per phase.
What signal input voltage level does the control interface require?
The digital command inputs (pulse/direction) operate on a standard 5 V DC logic signal level.
Can the D900.51 drive standard 2-phase stepper motors?
No, the D900.51 is specifically engineered to drive 3-phase stepping motors requiring a three-lead power output configuration.
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