Home > RS3 Servo Drive
| Item | Specifications |
|---|---|
| Series | RS3 AC Servo Drive |
| Control Method | IGBT PWM, sine-wave current drive |
| Rated Current | 1.6A – 12A |
| Input Voltage | 1-ph 220V / 1-3 ph 220V / 3-ph 380V |
| Encoder Type | Communication encoder (RS485) |
| Control Modes | Position, speed, torque |
| Protection | IP20 |
| Ambient Temperature | 0 ~ 55°C (derate above 45°C) |
| Control Versions | E (EtherCAT), P (pulse) |
| Input Voltage | Rated Current Range | Current Steps |
|---|---|---|
| Single-phase 220V | 1.6 – 6.6 A | 1.6 / 2.8 / 5.5 / 6.6 A |
| Single / three-phase 220V | 7.6 – 12 A | 7.6 / 12 A |
| Three-phase 380V | 3.5 – 12 A | 3.5 / 5.4 / 8.4 / 12 A |
*Rated current is selected to match the servo motor. Model code example: RS3 E - 5R5 L (series - control method - current - input voltage). We supply the drive matched and tested with the motor.
The RS3 is our compact servo drive series for small to mid-size axes. It uses IGBT PWM sine-wave current control with a communication-type (RS485) encoder interface, and covers rated currents from 1.6A to 12A. As an AC servo motor driver, it runs position, speed, and torque modes and pairs with our AC servo motors as a matched, tested set — the right drive when you don't need the higher-power range of the RA3.
The RS3 comes in two control versions, set by the model code: E is EtherCAT (bus control) and P is pulse. Choose E for networked multi-axis machines with a central controller, and P for simple pulse/direction single-axis control.
Rated current runs from 1.6A to 12A. The supply options are single-phase 220V (1.6–6.6A), single/three-phase 220V (7.6–12A), and three-phase 380V (3.5–12A). The RS3 covers the small and mid-size band; for currents above 12A and the larger 380V models, use the RA3 series.
The EtherCAT version (RS3E) follows IEC 61158 Type12 and IEC 61800-7 CiA 402, so it drops into standard EtherCAT motion controllers and supports the usual CiA 402 modes. The pulse version (RS3P) uses RS485 Modbus for parameter setup. A USB Type-C port is provided on both for PC tuning.
Protection covers over-voltage, under-voltage, phase loss, over-current, overload, over-speed, and encoder disconnection. A dynamic brake acts on power loss, alarm, servo-off, and over-travel. STO and full-closed-loop are available as options, set in the model code.
The RS3 is the compact series — 1.6A to 12A, EtherCAT or pulse — for small and mid-size axes. The RA3 is the full-range series, reaching 45A with three-phase 220V and large 380V models, plus an analog (A) version. Both share the same control platform and encoder interface; see the ra3-servo-drive page when you need higher power.
Yes. As an AC servo drive manufacturer and supplier, we provide the RS3 drive sized and tuned to the servo motor as a tested set, commutation, and gains are configured before delivery. The drive ships ready to run with the matched motor.
The RS3 servo drive is our compact AC servo drive series, built for small to mid-size axes that don't need the higher-power range of the RA3. It covers rated currents from 1.6A to 12A across single-phase 220V, single/three-phase 220V, and three-phase 380V supplies, using IGBT PWM sine-wave current control with a communication-type (RS485) encoder interface. It comes in EtherCAT and pulse versions and shares the same control platform as the RA3, so tuning and behaviour are consistent across the line. Every RS3 ships matched and tested with its motor.
| Parameter | Specification |
|---|---|
| Series | RS3 AC servo drive |
| Rated Current | 1.6 – 12 A |
| Input Voltage | 220V / 380V (1-ph and 3-ph) |
| Control Method | IGBT PWM, sine-wave current |
| Control Versions | E (EtherCAT), P (pulse) |
| Encoder Interface | Communication encoder (RS485) |
| Control Modes | Position, speed, torque |
| Protection Rating | IP20 |
The RS3 model code sets the control method:
Unlike the RA3, the RS3 does not offer an analog (A) version; if you need an analog command interface, use the RA3A.
The EtherCAT version follows IEC 61158 Type12 and IEC 61800-7 CiA 402, so it integrates with standard EtherCAT motion controllers and supports the usual CiA 402 operating modes. The pulse version communicates over RS485 Modbus for parameter setup, and a USB Type-C port is provided on both versions for PC tuning software.
Every RS3 drive includes a full protection set — over-voltage, under-voltage, phase loss, over-current, overload, over-speed, and encoder disconnection. A dynamic brake engages on power loss, alarm, servo-off, and over-travel. Optional functions, set in the model code, include STO (safe torque off) and full-closed-loop control.
The RS3 suits small to mid-size industrial axes where a compact drive fits best:
Both share the same control platform and encoder interface. The difference is power coverage and the analog option:
| RS3 | RA3 | |
|---|---|---|
| Rated Current | 1.6 – 12 A | 1.6 – 45 A |
| Input Voltage | 220V / 380V | 220V / 380V |
| Control Versions | E / P | E / P / A |
| Best For | Compact, small to mid axes | Full range, higher power |
Choose the RS3 for small to mid-size axes in a compact package within 12A. For the full current range, higher-power 380V models, or an analog command version, see the RA3 servo drive. Both pair with our AC servo motor range as a matched set.
The RS3 model code reads series – control method – rated current – input voltage – option. For example, RS3E-5R5L is an RS3 EtherCAT drive, 5.5A, single-phase 220V. Current ratings use the R notation (5R5 = 5.5A, 12R = 12A). As the factory, we help you select the right code against your motor and supply, support custom configurations for OEM projects, and ship the drive matched and tested with the motor.
