Product Description:

The AX5701 is a single-axis digital servo drive produced by Beckhoff in the AX Digital Servo Drives series. It links a motion controller to a synchronous servo motor, processing encoder data and modulating phase current to close the velocity and position loops required for precise industrial automation. The unit simplifies cabinet layouts by combining control, feedback, and power terminations on a single multipole connector.

The analog-digital input labeled A-D uses an open-collector circuit and accepts a maximum sourcing current of 1 mA, so external sensors need only a small sink capability. This channel operates in a single-ended mode, referencing the incoming signal to logic ground for simpler wiring. The drive provides six digital inputs on that terminal for status or trigger signals. All wiring terminates on a compact 15-pin connector, allowing power, feedback, and control lines to be connected without breakout boards. One encoder input supports incremental or absolute protocols and routes its differential tracks through the same connection. This arrangement reduces the number of separate terminal points needed inside the control cabinet.

The secondary E-F interface uses a differential signaling scheme that improves noise immunity on longer cable runs. Its input impedance is fixed at 120 Ω, matching standard twisted-pair transmission lines so reflections are minimized. When a Hiperface encoder is attached, the drive supplies a dedicated 9 V source, while other feedback devices draw power from the primary sensor rail rated at 5 V. The drive recognizes EnDat, BiSS B, Hiperface, Sin/Cos 1 Vpp, and TTL formats, allowing it to process signals from several common feedback devices. The TTL interface supports incremental encoders, but automatic wire-break detection is not available on its signal lines. Encoder selection should account for the supported protocol, signal type, and available sensor voltage.