The Omron R88M-1M40020C-BO is a 400 W servo motor from the 1S Series, running at 2000 rpm on a 480 VAC three-phase supply. It carries an integrated holding brake and an absolute encoder, so position is retained at power-off and homing on restart is unnecessary — a real time-saver on multi-axis lines that cycle daily. The cylindrical body with an oil-tight seal means it survives the washdown that food-and-beverage and packaging floors throw at it; no need to bag or shield the motor for daily CIP.
What the ratings mean for fit
400 W at 2000 rpm gives you a torque curve suited for indexing conveyors, rotary tables, and pick-and-place axes that need moderate speed with position hold. The 480 VAC supply is standard for three-phase industrial mains in North America and much of Europe; the motor is wound for that voltage directly, so no step-down transformer is needed between the drive and the motor. The absolute encoder eliminates the need for a home sensor and the associated wiring — the drive knows the shaft position the instant power is applied. That matters on lines where a homing sequence would add seconds to every startup or recovery after a power loss. The holding brake is rated for static holding, not dynamic stopping — it holds the load at standstill, so the axis doesn't drift when the drive is disabled. For vertical loads or Z-axis applications, that brake is what keeps the load from dropping when power is removed. The oil-tight seal (IP67-equivalent on the shaft exit) means the motor can be mounted directly in a splash zone without a drip cover. That's a cleanability win for food lines that see high-pressure washdown every shift.
Integration notes
The cylindrical body with no keyway or tap (Key and tap: No) means the shaft is smooth — the load couples via a clamping hub or collet, not a keyed fit. That simplifies mounting on some precision couplings but requires the hub to be sized for a smooth shaft. The absolute encoder uses a serial interface (Omron's own protocol, compatible with the 1S-series drive); the feedback cable is a dedicated shielded pair, not shared with the power cable. Keep the power and feedback cables separated by at least 100 mm in the cable tray to avoid encoder noise injection. The oil-tight seal is factory-installed; no field maintenance is required, but if the seal is damaged during installation, the motor loses its washdown rating, so handle the shaft end carefully when fitting the coupling.