OMRON R7M-A20030-S1 SMARTSTEP AC Servo Motor

The R7M-A20030-S1 is a 200-watt AC servo motor belonging to OMRON's SMARTSTEP A-series. It operates on 200 VAC (three-phase) and provides a rated torque of 0.64 Nm with a maximum torque of 1.91 Nm. The motor features an incremental 2500 PPR encoder (13-bit resolution) for accurate position and speed feedback. It is designed to pair with OMRON SMARTSTEP A-series drives (R7D-AP series) and can also be used with certain Yaskawa Sigma II drives via adapter cables.

Technical Specifications

• Rated Output Power: 200 W

• Rated Torque: 0.64 Nm (6.5 kgf-cm)

• Instantaneous Peak Torque: 1.91 Nm

• Rated Speed: 3000 rpm

• Maximum Speed: 4500 rpm

• Rotor Inertia: 0.35 × 10⁻⁴ kg·m²

• Encoder: Incremental, 2500 PPR (13-bit), with A/B/Z differential outputs

Mechanical Construction

The motor has an IP65 protection rating (excluding shaft opening), making it resistant to dust and water jets. The housing is aluminum alloy with a natural convection cooling method. Shaft diameter: 8 mm with a keyway. Dimensions: 40 mm square flange (metric standard). Weight: 1.0 kg. The motor includes a 24 VDC brake option (not present on this base model) and a terminal box for power and encoder cables.

Performance Characteristics

Torque-speed curve shows constant torque up to 3000 rpm (0.64 Nm) and then field-weakening region to 4500 rpm with reduced torque. The motor's low cogging torque (<2% of rated) ensures smooth rotation at low speeds. Electrical time constant: 0.9 ms; mechanical time constant: 0.7 ms. Insulation class F (155°C) with a thermal protection built-in (PTC thermistor).

Applications

Typical uses include small pick-and-place robots, conveyor drives, printing machinery, and automated assembly equipment. The R7M-A20030-S1 is compatible with OMRON CP1H, CJ2, and NJ-series PLCs using pulse train or fieldbus control (via the drive). It can also be used as a direct replacement for Yaskawa SGMJV-02A series with minor wiring changes.

Installation and Environmental Data

Operating temperature: 0°C to 40°C (non-freezing); storage: -20°C to 60°C. Humidity: 20–80% (non-condensing). Vibration: 5.9 m/s² (0.6G) at 10–55 Hz. Shock: 49 m/s² (5G). The motor meets UL 1004, CSA C22.2, and CE (EMC Directive) standards. Shaft runout is within 0.03 mm TIR. Standard connection uses MS3102-type connectors.