42 mm closed loop Stepper Motor for Compact Automation

The iESSH42-24-07-17BC-RC/EC is a 42 mm closed loop Stepper Motor rated at 0.7 N·m holding torque, running from a 24 VDC supply at 1.7 A. It is the compact end of the fieldbus closed loop range and is intended for small positioning axes where machine builders want closed loop behavior without the footprint of a separate drive. The integrated construction with a 17-bit absolute encoder and RS485+CAN or EtherCAT makes it a complete, stockable axis component.

Low-Voltage Design

A 24 VDC bus is convenient in machines that already carry 24 V for sensors and valves. The integrated drive accepts that supply directly, so no additional power module is needed on the axis.

Encoder and Fieldbus

The 17-bit absolute encoder reports rotor position without a homing move, and RS485+CAN or EtherCAT connects the unit to the controller. Parameter setting and diagnostics are done over the same bus.

Specifications

• Frame size: 42 mm
• Holding torque: 0.7 N·m
• Supply voltage: 24 VDC
• Rated current: 1.7 A
• Fieldbus: RS485 + CAN / EtherCAT
• Encoder: 17-bit absolute
• Control: closed loop

Mounting and Duty

With 0.7 N·m available, this size suits light indexing, short-stroke positioning, and small rotary mechanisms. Heat is generated inside the motor body, so avoid fully enclosed mounting pockets; the frame surface should be open to ambient air.

Applications

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

Selection Notes

For small axes, check the worst-case torque including acceleration and friction against the 0.7 N·m rating, and confirm the 24 VDC supply can deliver the 1.7 A peak current. The absolute encoder keeps the axis ready to resume after a stop, which is useful in machines that pause frequently. The 24 VDC input also makes this unit compatible with control cabinets that already distribute 24 V for sensors and valves, simplifying the electrical design. Request the dimensional drawing and torque-speed curve from Lyenwsin before prototyping.