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Definition

Model definition

HA8/RA8-U25(H)-M is a high‑torque UART/RS‑485 bus servo with metal gears and absolute position feedback.

Torque / Speed curve

Key points:

  • Operating voltage: 6–8.4 V

  • Stall torque: 25 kg·cm (example)

  • Absolute encoder: 12-bit

Pinout (example)

Pin Name Notes
1 V+ Power
2 GND Ground
3 DATA UART/RS-485