4.5 N·m closed loop Stepper Motor with Integrated Drive

The iESS86-60-45-17BC-RC/EC is a 4.5 N·m closed loop Stepper Motor in an 86 mm frame, powered from a 60 VDC bus at 6.0 A. It combines the larger frame with the lower voltage tier of the fieldbus closed loop range, and it carries a 17-bit absolute encoder with RS485+CAN or EtherCAT fieldbus. This unit is supplied as an integrated axis for industrial automation and CNC applications.

Frame Size vs. Voltage

The 86 mm frame provides mechanical stiffness and a large mounting face for torque reaction. Running on 60 VDC keeps the power supply simpler than the 80 VDC models while still delivering 4.5 N·m holding torque.

Bus and Feedback

RS485+CAN and EtherCAT are both offered. The 17-bit absolute encoder feeds the closed loop and gives absolute rotor position at power-up, eliminating homing cycles on every restart.

Specifications

• Frame size: 86 mm
• Holding torque: 4.5 N·m
• Supply voltage: 60 VDC
• Rated current: 6.0 A
• Fieldbus: RS485 + CAN / EtherCAT
• Encoder: 17-bit absolute
• Control: closed loop

Duty and Cooling

Continuous torque is limited by frame temperature. With 6.0 A available, duty cycling is the safest operating mode at the rated 4.5 N·m; provide a metal heat path from the flange to the machine base for longer duty periods. Use the duty-cycle worksheet to confirm the axis can maintain the required index rate without overheating in the machine environment.

Applications

• Industrial automation
• Packaging machinery
• Robotics
• CNC machine tools

Sizing Notes

Match the axis inertia and acceleration profile to the torque-speed curve for the 60 VDC bus, and confirm the supply can hold 6.0 A during acceleration peaks. For lower-voltage plants, the 60 VDC input reduces the cost of the power distribution components while keeping the 86 mm frame torque class. The 86 mm flange must sit on a clean, flat surface for thermal and mechanical performance. Contact Lyenwsin for the duty-cycle calculation worksheet and mounting drawing.