Overview

Two-Way Bus Communication

Bi-directional UART protocol with baud rates up to 1 Mbps, supporting fast control commands and feedback data such as position and other operating status.

Complete Protection & Smart Power Limiting

Built-in safeguards for temperature, voltage, stall, power, and current, with automatic power limiting to keep operation within a safe range.

Advanced Modes & Stop Behaviors

  • Single-Turn: ±180° range for standard rotary joints
  • Multi-Turn: ±368,640° (1,024turns) range, with multi-turn count saved after power-off
  • Damping Mode: controlled resistance for smooth, compliant motion
  • 3 Stop Modes: Free, Lock, and Damp for different holding/release needs

Rich Motion Commands & Profiles

Configure speed, time, and power per application, with sync/async command options and built-in trapezoidal accel/decel profiles for smooth motion and customizable ramp intervals.

Custom Home Position

A 12-bit absolute position encoder (4,096 steps) lets you define any point as the home position, simplifying assembly, reducing software offset adjustments, and improving position control accuracy.

Unified Ecosystem & Daisy-Chain Ready

All servos share the same protocol for high compatibility, allowing different models to be daisy-chained on the same bus. Within each series, the housing and mounting hole patterns are standardized for easy swaps and consistent mechanical integration.

Specification

 Item

Basic Specifications

Protocol Type

UART

Input Voltage

9.0-12.6v

Motor Type

Coreless motor

Position Sensor

12-bit magnetic absolute encoder

Effective Position Range

±180° (Single-turn Position Control Mode)
±368,640° (Multi-turn Position Control Mode)

Resolution

4,096/360° (0.088°)

Processor

32bit MCU

Baud Rate

9,600bps~1Mbps

ID Range

0~254

Reduction Ratio

273:1

Output Spline Specification

Stainless Steel / Ø6mm / 25T

Gear Material

All-metal stainless steel composite gear

Interface

PH2.0-3Pin

Case Materia

Aluminum alloy middle frame with 
upper/lower engineering plastic housings

Dimensions

40×20×40mm

Appearance

Dual-shaft

Weight

73g

Operating Temperature

-10~60℃

Operating Mode

Single-turn Position Control Mode
Multi-turn Position Control Mode
Damping Mode

 Item

Characteristic Specifications

Max Stall Torque

4.41N·m (45kg-cm)   

Max Continuous Torque

1.67N·m (17kg-cm)

Rated Torque

0.54N·m (5.5kg-cm)

Rated Speed

64rpm (0.156sec@60°)

No Load Speed

90rpm (0.110sec@60°)

No Load Current

<300mA

Standby Current

<30mA

Peak Current

6A

Axial Load

20N

Radial Load

40N

Performance Curves

SDK And Platforms

CAD Drawings

Documents

Certification

HS Code

8501109990

ECCN Code

EAR99

Country of Origin

China

Certifications

CE, FCC, RoHS

Part List

 Item

Qty.

Servo

8-Hole Main Horn

1

8-Hole Assistant Horn

1

PM M3*6mm Screw

1

PM M2*4.5mm Screw

21

PB M2*4.5mm Screw

5

200mm 3-pin Cable (PH2.0) 

1

Protocol Type

UART

Input Voltage

9.0-12.6v

Motor Type

Coreless motor

Position Sensor

12-bit magnetic absolute encoder

Effective Position Range

±180° (Single-turn Position Control Mode) | ±368,640° (Multi-turn Position Control Mode)

Resolution

4,096/360°(0.088°)

Processor

32bit MCU

Baud Rate

9,600bps~1Mbps

ID Range

0~254

Reduction Ratio

273:1

Output Spline Specification

Stainless Steel / Ø6mm / 25T

Gear Material

All-metal stainless steel composite gear

Interface

PH2.0-3Pin

Case Material

Aluminum alloy middle frame with upper/lower engineering plastic housings

Dimensions

40×20×40mm

Appearance

Dual-shaft

Weight

73g

Operating Temperature

-10~60℃

Operating Mode

Single-turn Position Control Mode | Multi-turn Position Control Mode | Damping Mode

Max Stall Torque

4.41N·m (45kg-cm)

Max Continuous Torque

1.67N·m (17kg-cm)

Rated Torque

0.54N·m (5.5kg-cm)

Rated Speed

64rpm (0.156sec@60°)

No Load Speed

90rpm (0.110sec@60°)

No Load Current

<300mA

Standby Current

<30mA

Peak Current

6A

Axial Load

20N

Radial Load

40N

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UART Bus Servo (RP8-U45H-M)

$200.00

A high‑torque UART bus servo (12v) with an coreless motor, all‑metal gears, and a robust dual‑shaft design.
Delivering 45 kg·cm stall torque , it’s a reliable, beginner‑friendly option for upgrades and easy system integration.
SKU: 02.06.00000100 Category: