
Overview
The EYOU RHU32H-120 is a harmonic-drive robot joint actuator for humanoid robot joints, offered with 120 or 160 reduction ratios and with or without a brake. It combines a built-in driver, 48 VDC rated operation, dual absolute encoding, and EtherCAT/CANopen communication. Select the ratio for the listed output torque and speed values; brake selection affects the stated B/N weight.
Features
- Harmonic reducer with a built-in driver.
- Dual absolute encoder: motor side 17 bit and reducer side 19 bit.
- Power, CAN FD, EtherCAT, and STO terminal interfaces.
- EtherCAT and CANopen communication protocols.
- Control modes: Profile Position (PP), Profile Velocity (PV), Profile Torque (PT), Cyclic Synchronous Position (CSP), Cyclic Synchronous Velocity (CSV), etc.
- Available with or without a brake; 120 and 160 reduction-ratio options are offered.
Specifications
| Parameter | Value |
|---|---|
| Module Model | RHU32H-120 |
| Reducer Type | Harmonic |
| Motor Rated Power (W) | 471 |
| Motor Rated Torque (N·m) | 1.8 |
| Motor Peak Torque (N·m) | 4.5 |
| Reduction Ratio | 120 / 160 |
| Joint Rated Power (W) - Life Constraint | 216 / 221 |
| Rated Torque at 2000 rpm Input (N·m) | 124 / 169 |
| Average Load Torque at Output (N·m) | 197 / 267 |
| Peak Torque at Output (N·m) | 270 / 459 |
| Max Allowable External Torque at Output (Instantaneous) (N·m) | 848 / 848 |
| Backlash (arcsec) | ≤20 / ≤20 |
| Rated Speed at Output (rpm) - Life Constraint | 17 / 12.5 |
| Peak Speed at Output (rpm) | 22 / 16.25 |
| Brake (B/N) | B/N |
| Dimensions (Outer Diameter × Axial) (mm) | Φ120 × 126 |
| Weight (kg) (B/N) | 4.36 / 4.08 |
| Hollow Diameter (mm) | 22 |
| Housing Appearance (Process Color) | Anodized (Non-sandblasted) |
| Reducer Appearance (Process Color) | Outer Ring Blackened |
| Radial (dynamic/static) Allowable Load at Output (N) | 1350 |
| Axial (dynamic/static) Allowable Load at Output (N) | 1350 |
| Output Bending Moment (N·m) | 460 |
| Reducer Torsional Stiffness (N·m/rad) | 99000 |
| Reducer Input Inertia (kg·mm²) (B) | 397 / 397 |
| Equivalent Joint Output Inertia (kg·mm²) (B) | 5716800 / 10163200 |
| Rated Operating Voltage (VDC) | 48 |
| Operating Voltage Range (VDC) | 24–48 |
| Driver | Built-in |
| Encoder/Bit (bit) | Dual Absolute / Motor side 17 Bit & Reducer side 19 Bit |
| Driver Interface (see terminal model description) | Power (DC in DC out), CAN FD (In, Out), EtherCAT (In, Out), STO (1, 2) |
| Communication Protocol (see communication description) | EtherCAT / CANopen |
| Control Modes | Profile Position (PP), Profile Velocity (PV), Profile Torque (PT), Cyclic Synchronous Position (CSP), Cyclic Synchronous Velocity (CSV), etc. |
| Operating Ambient Temperature (°C) | -20–60 |
| Housing Temperature Rise (°C) | ≤60 |
| Noise (dB) | ≤60 |
| Life (h) | >10000 |
Applications
- Humanoid robots
- Robotic arms
- Exoskeletons
- Quadruped robots
- AGV vehicles
- ARU robots
Documentation
- EYOU CANable — User Manual (PDF)
- EYOU RHU 32H 120 Drawing — Drawing (PDF)
- EYOU PHU RHU Series Joint CANopen EtherCAT Communication — Manual (PDF)
- EYOU Robot Joint Catalog — Robot Joint Product Catalog (PDF)
- EYOU RP Series EN V1.0 20260608 — User Manual (PDF)
- EYOU UART Debug Module — User Manual (PDF)
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