Product Description:

The PY0A100A0R42S02 servo amplifier is produced by Sanyo Denki as part of the PY Super BL Servo Amplifiers series. Within an automation cell, it converts incoming AC power into controlled pulse-width modulation output, supervises encoder signals, and issues dynamic braking commands to a connected servo motor. By performing these tasks, it stabilizes axis velocity and position so that machine tools, electronic assembly machines, and material-handling lines can achieve repeatable motion profiles. The amplifier manages the power conversion and feedback processing required for accurate closed-loop control. Its integrated functions also reduce the need for separate motion-control components within the electrical cabinet.

Separate supplies feed the logic and drive stages. The control circuitry accepts single-phase 200–230 VAC, which powers the internal digital signal processors and interface relays. Motor energy is drawn from a dedicated three-phase 200–230 VAC line so that current spikes remain isolated from the input and output electronics. The input bridge supports utility frequencies of 50/60 Hz, enabling the same unit to operate with either common power standard. Control power consumption is limited to 40 VA, which simplifies cabinet transformer sizing and minimizes standby losses. The current loop has a small-signal frequency characteristic of 400 Hz, allowing the amplifier to track rapid command changes with minimal phase lag during high-speed indexing. This response supports precise motor-current regulation when an axis accelerates, decelerates, or responds to changing loads.

A commanded stop engages the internal brake circuit after 24.0 ms, providing predictable deceleration timing for vertical axes. Initial energization draws 20 A of inrush current, which must be considered when selecting upstream fuses and contactors. Closed-loop speed accuracy is maintained across a 1:5000 velocity control range, so slow creeping movements and high-speed traverses can use the same drive without gain changes. The permitted ambient operating temperature ranges from 0 to 55 °C, allowing the unit to run in warm production areas when adequate panel airflow is available. Proper ventilation helps remove heat from the power electronics during sustained operation. The specified braking delay also allows the machine controller to coordinate stopping sequences with other moving axes and external safety devices.