Product Description:

The PY0A050A0P21P00 servo amplifier is produced by Sanyo Denki within the PY Super BL Servo Amplifiers series. Designed for closed-loop industrial motion, it energizes three-phase brushless servomotors while executing position control commands from a host controller. The unit operates in position control mode using pulse-train inputs and provides monitor outputs for velocity and current, allowing drive performance to be observed during production. These monitoring signals also support system diagnostics without altering the active motion command.

Its continuous output capacity reaches 50 A, indicating the phase current that the drive can deliver continuously without derating. Excess kinetic energy is dissipated through an internal regeneration section rated at 60 W and connected to a fixed 20 Ω resistor, so moderate deceleration does not require an external brake. During initial power-up, the control stage can draw up to 40 A of inrush current, which must be considered when selecting upstream protection. The velocity and current loops maintain stability up to 400 Hz, providing adequate bandwidth for responsive pick-and-place or indexing axes. Position commands are accepted as differential pulses, and a ±2.0 VDC reference is available for external current limiting.

The maximum forward or reverse pulse frequency is 2.6 M pulses/s, enabling the amplifier to track fine step counts without missing edges while working with the incremental encoder feedback path. The velocity loop offers a speed regulation range of 1:5000, supporting both slow feed and rapid traverse with the same amplifier configuration. After a stop command, the dynamic brake engages following a delay of 24.0 ms, preventing drift while minimizing mechanical shock. This delayed engagement allows commanded deceleration to occur before the brake restrains the motor shaft. The assembly weighs 4.4 kg, allowing direct panel mounting without heavy reinforcement.