Harmonic Drive RSA-8A Integrated Servo Actuators
Harmonic Drive RSA-8A Integrated Servo Actuators
Harmonic Drive RSA-8A combines a miniature strain-wave actuator, brushless motor, motor feedback and CANopen servo drive in one assembly. Ratios 30, 50 and 100 provide different torque and output-speed limits. Its four-conductor power-and-network connection simplifies one part of the installation, while the host motion control, machine safety and load-support design remain external responsibilities.
Review Summary
Consider RSA-8A for a compact OEM rotary mechanism that fits its torque-speed duty and CANopen control architecture. The useful distinction is its integrated amplifier and small package. Select from the continuous as well as maximum ratings, and distinguish motor-derived output counts from an independent output encoder or a guaranteed positioning accuracy.
Integrated functions Actuator, brushless motor, 14-bit motor-input absolute encoder and servo drive Ratios 30 / 50 / 100 Allowable continuous torque 0.7 / 1.2 / 2.0 Nm; maximum torque 1.8 / 3.3 / 4.8 Nm in the cited brochure Output speed by ratio 30 / 50 / 100 Allowable continuous 116.7 / 70 / 35 rpm; maximum 283.3 / 170 / 85 rpm Power supply 24 VDC nominal; +7 to +30 VDC listed range Communication CANopen; manufacturer lists DS301/DS402 and torque, velocity, position, CSP, CSV and CST modes Four-conductor connection CANH, CANL, +24 VDC and 0 VDC; use the specified wiring and mating arrangement Feedback 14-bit, 16384 counts per motor revolution; brochure/order tables identify motor-input sensing Output-equivalent count scale 491520 / 819200 / 1638400 counts per output revolution for ratios 30 / 50 / 100; calculated through reduction One-way positioning accuracy 2 arcmin in the brochure; distinct from the count scale Motor current, ratios 30 / 50 / 100 Maximum 4.0 / 4.0 / 3.5 A RMS; allowable continuous 2.05 / 2.0 / 1.7 A RMS; these are motor currents Output and mass Shaft or optional F flange output;200 g standard, 190 g with F option Moment-load entry 3.46 Nm allowable moment load; validate actual combined load and duty Environment Brochure operation 0 to 40°C; enclosed, self-cooled; specified clean indoor environment Price Request a quote for exact ratio, output, cable exit, cables and control scope Applications and Industries
Consider RSA-8A for compact robotic or OEM rotary mechanisms where its torque-speed duty, CANopen interface and environmental limits fit the machine. The component does not establish a complete certified robot joint or a machine-level safety architecture.
Industrial automation
Request a quote for the exact configuration,quantity and delivery schedule.
| Integrated functions | Actuator, brushless motor, 14-bit motor-input absolute encoder and servo drive |
| Ratios 30 / 50 / 100 | Allowable continuous torque 0.7 / 1.2 / 2.0 Nm; maximum torque 1.8 / 3.3 / 4.8 Nm in the cited brochure |
| Output speed by ratio 30 / 50 / 100 | Allowable continuous 116.7 / 70 / 35 rpm; maximum 283.3 / 170 / 85 rpm |
| Power supply | 24 VDC nominal; +7 to +30 VDC listed range |
| Communication | CANopen; manufacturer lists DS301/DS402 and torque, velocity, position, CSP, CSV and CST modes |
| Four-conductor connection | CANH, CANL, +24 VDC and 0 VDC; use the specified wiring and mating arrangement |
| Feedback | 14-bit, 16384 counts per motor revolution; brochure/order tables identify motor-input sensing |
| Output-equivalent count scale | 491520 / 819200 / 1638400 counts per output revolution for ratios 30 / 50 / 100; calculated through reduction |
| One-way positioning accuracy | 2 arcmin in the brochure; distinct from the count scale |
| Motor current, ratios 30 / 50 / 100 | Maximum 4.0 / 4.0 / 3.5 A RMS; allowable continuous 2.05 / 2.0 / 1.7 A RMS; these are motor currents |
| Output and mass | Shaft or optional F flange output;200 g standard, 190 g with F option |
| Moment-load entry | 3.46 Nm allowable moment load; validate actual combined load and duty |
| Environment | Brochure operation 0 to 40°C; enclosed, self-cooled; specified clean indoor environment |
| Price | Request a quote for exact ratio, output, cable exit, cables and control scope |
