Lenze EVS9321-ES 9300-Series Servo Inverter (0.37 kW)

Product Overview

The EVS9321-ES (EVS9321 ES) is a high-precision servo inverter from Lenze’s established 9300-Series, specifically engineered for low-power, high-accuracy industrial automation tasks. Rated at 0.37 kW, this compact drive is an ideal solution for small-scale applications such as precise feeder drives, labeling machines, and conveyor synchronization. Featuring an IP20 degree of protection for cabinet-mounted reliability, the EVS9321-ES is recognized for its robust control loops and stable performance. While the 9300-series is currently in its phase-out stage, this module remains a vital component for global production lines due to its durability and the availability of both new-old-stock and certified refurbished units.

Technical Configuration

The EVS9321-ES architecture is centered on providing flexible "Servo Inverter" functionality, allowing for high-dynamic velocity and torque control. It supports a wide variety of feedback systems through pluggable modules, including resolvers and various encoder types. The drive is designed with a "testable" framework, permitting extensive diagnostics through Lenze's Global Drive Control (GDC) software. Its compact frame (approx. 4.10 kg) allows for high-density mounting in electrical cabinets, and its internal logic is optimized to minimize electromagnetic interference (EMI) while maintaining high-frequency response in rapid pick-and-place or cyclic operations.

Technical Specifications

Technical FAQs

What is the difference between the "Servo Inverter" (ES) and "Position Controller" (EP)?

The EVS9321-ES (Servo Inverter) is primarily designed for speed and torque control via an external master controller (like a PLC). While it can perform basic motion tasks, it is optimized for high-dynamic velocity following rather than complex internal position profile storage.

Is the EVS9321-ES compatible with modern Fieldbus protocols?

Standard communication is via CANopen or RS-232/485. However, the drive’s modular slot system allows for the integration of fieldbus modules for PROFIBUS, INTERBUS, or even Ethernet-based protocols using appropriate 2170-series communication cards.

Can I replace a failed unit with a refurbished EVS9321-ES?

Yes. Because the 9300-series is in the phase-out stage, refurbished units are a common and sustainable way to maintain existing machinery. These units typically undergo rigorous testing to ensure they meet original factory specifications for 0.37 kW output.

Engineering & Installation Guide

• Compact Mounting: The EVS9321-ES is designed for side-by-side mounting. To ensure optimal cooling in small cabinets, maintain at least 100 mm of vertical clearance above and below the unit. This allows the natural convection and internal fan cooling to prevent thermal derating.

• Shielding for Precision: Because the 0.37 kW model often drives sensitive, small-diameter motors, high-frequency noise can be an issue. Ensure motor cables are shielded and the shield is clamped to the drive's mounting plate using a large-surface area EMC clip.

• Software Configuration: Commissioning is performed using the Lenze Global Drive Control (GDC) software. When retrofitting or replacing a unit, ensure you upload the parameter set from the old drive to the new one to maintain identical gain settings and I/O mapping.