E21NRLS-LNN-NS-02 Kollmorgen
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The Kollmorgen E21NRLS-LNN-NS-02 is a stepper motor from the E Hybrid Stepper Motors series, featuring a NEMA 23 frame size and a step angle of 1.8 degrees, providing 200 steps per revolution. It is constructed with SIGMAX technology, has a regular leadwire connection style, and uses Class B insulation rated for 340 Vdc.
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Product Description:
The E21NRLS-LNN-NS-02 is a hybrid stepper motor produced by Kollmorgen as part of the E Hybrid Stepper Motors series. As a two-phase actuator, it converts pulse commands from indexers or microstepping drives into incremental rotary motion for pick-and-place modules, small gantries, and laboratory dispensers. SIGMAX construction increases the magnetic cross-section, while the laminated rotor keeps detent torque low, allowing the motor to hold its position in open-loop industrial automation tasks without feedback devices.
The motor occupies a NEMA 23 frame, so its 56 mm square face fits common brackets and gearheads. Each electrical pulse advances the shaft by 1.8 degrees, giving 200 discrete full-step positions per revolution; where finer resolution is needed, microstepping subdivides that angular increment. Mechanical repeatability remains within ±1.5% of a full step, making the motor suitable for indexing tables that require predictable overshoot margins. Winding terminations exit as a four-lead series bundle in a regular lead-wire style, enabling simple series or bipolar connections to standard chopper drives. The single stator stack, smooth single shaft, and NEMA mounting pattern minimize axial length and simplify integration into compact machine frames.
The electrical insulation withstands up to 340 VDC and has a volume resistance of 100 megohms to resist electrical breakdown. The thermal design follows the Class B limit of 130 °C, so the drive current and ambient airflow must keep the winding temperature below that limit. The safe operating temperature ranges from -20 °C to +40 °C, allowing the motor to function in unheated warehouses or enclosed equipment cabinets. Its insulation system provides electrical separation when the motor is connected to compatible microstepping amplifiers. Appropriate current regulation helps control winding heat during repeated starts, stops, and holding periods. Adequate airflow around the housing also allows heat to dissipate during sustained open-loop operation.
