Berger-Lahr GmbH D900.51 Stepping Motor Drive

Berger Lahr D900.51 Stepping Motor Drive is a single‑axis drive card that controls Schneider Electric Berger Lahr 3‑phase motors with N windings (VRDM 36x LN / VRDM 39x LN) using a 5 V pulse/signal interface. It accepts PULSE, DIR, GATE, ZERO CURRENT, and MICROSTEP inputs with an optional Ready output, and runs from a high‑voltage DC supply in the 80–140 VDC range to deliver motor current adjustable up to 5.5 A (the exact current set via DIP switches). The board is a 100 × 160 × 51 mm Eurocard that can be rack‑mounted in a 19" enclosure (3HU). It achieves microstepping up to 200 kHz with selectable step resolutions of 200, 400, 500, 1000, 2000, 4000, 5000, and 10000 steps per revolution, making it suitable for precise positioning in CNC, packaging, and other automation applications that use Berger Lahr’s BRS3 motors. The D900.51 variant is the 5 V input version (as opposed to the 24 V input D900.50) and is commonly described in listings as a 130 VDC, 4 A, 40 W stepping motor drive.