2.0 N·m RS485 Stepper Motor with closed loop Control

For motion axes that must join a serial control network without the clutter of a separate drive cabinet, the iESS57-36-20-17BC-RC is a practical starting point. This 2.0 N·m RS485 Stepper Motor packages a 57 mm stepper, its drive electronics, and a 17-bit absolute encoder into one housing, so an engineer wires a single unit to the bus instead of assembling a motor, driver, and feedback loop from discrete parts.

What the Integrated Package Changes

When the drive mounts directly on the motor, the encoder cable, motor power cable, and signal wires that normally run between a driver and its motor disappear. The remaining connections are the 36 VDC supply and the RS485+CAN network. For machines with several axes, this integration shortens the wiring harness, reduces the chance of connection faults, and frees panel space inside the cabinet.

closed loop Feedback with a 17-Bit Absolute Encoder

The built-in 17-bit absolute encoder gives the axis its position immediately at power-on, so the machine does not need a homing move after every restart. The closed loop compares commanded position with the actual rotor position and corrects deviations caused by load changes or mechanical friction. Axes that hold position between moves, such as indexing stations and rotary fixtures, benefit most from this behavior.

Key Specifications

• Frame size: 57 mm
• Holding torque: 2.0 N·m
• Supply voltage: 36 VDC
• Rated current: 5.0 A
• Fieldbus: RS485 + CAN
• Encoder: 17-bit absolute
• Control mode: closed loop

Mounting and Thermal Considerations

The 57 mm flange should be bolted to a flat metal surface that can spread heat, and the housing should stay open to airflow. The 5.0 A rating gives the drive current headroom for acceleration, but continuous duty must respect the thermal derating of the frame. Following these mounting rules keeps torque performance consistent over long production runs.

Applications

This model suits factory automation stations, packaging machinery, robotics, and CNC machine tools where a fieldbus-controlled axis with absolute feedback reduces wiring and commissioning time. Lyenwsin supplies the protocol manual, dimensional drawing, and multi-axis wiring examples for the RS485 and CAN variants.