EVS9321-EP Lenze 9300-Series 0.37kW Servo Position Controller

Product Overview

The EVS9321-EP (EVS9321-EP) is a compact and high-precision servo position controller from the Lenze 9300-Series, specifically engineered for low-power motion control applications requiring exact repeatability. With a rated power of 0.37 kW, this drive is a foundational component for automated systems such as small-scale pick-and-place robotics, labeling machines, and precision feeding units. The "EP" designation signifies its specialized "Positioning" software variant, which enables the unit to handle complex travel profiles and point-to-point positioning independently of the central PLC. Designed for cabinet installation with an IP20 protection rating, the EVS9321-EP combines German engineering reliability with advanced motion logic, ensuring consistent throughput and minimal mechanical stress in high-cycle production environments.

Technical Configuration

The hardware architecture of the EVS9321-EP is optimized for high-density mounting, featuring a slim vertical profile of 7.60 x 35.60 x 25.40 cm. It incorporates a sophisticated power stage capable of driving high-dynamic synchronous motors with high resolution. The "Positioning" firmware allows for the internal storage of multiple target positions, homing routines, and acceleration/deceleration ramps, which can be triggered via digital I/O or a fieldbus connection. The module supports various feedback systems, including resolvers and encoders, and includes integrated safety monitoring for overvoltage, earth faults, and motor temperature. Its 4.20 kg robust housing ensures efficient heat dissipation through natural or forced convection within the control cabinet.

Technical Specifications

Technical FAQs

Does the EVS9321-EP require an external motion controller for point-to-point tasks?

No. The EVS9321-EP features an integrated positioning control system. You can store travel profiles directly on the drive and execute them via simple digital signals or communication commands, reducing the processing load on your master PLC.

How can I transfer parameters from a failed unit to a replacement EVS9321-EP?

You can use the Lenze Keypad (EMZ9371BC) to copy the parameter set or the Global Drive Control (GDC) software via an interface module. Since this is a phase-out product, maintaining a parameter backup is critical for rapid 1:1 hardware replacement.

What is the recommended mains input for this 0.37 kW drive?

The 9321 model typically operates on a 3-phase 400/480 VAC supply. Always verify the specific voltage code on the unit’s nameplate to ensure compatibility with your local grid and to prevent damage to the internal DC bus capacitors.

Engineering & Installation Guide

Vertical Mounting and Thermal Clearance:

The EVS9321-EP must be mounted vertically to facilitate natural convection. Due to its height, ensure a minimum clearance of 100 mm above and below the unit. For 0.37 kW operation in high-density cabinets, maintain a lateral gap of at least 10 mm between adjacent drives to prevent thermal interference and ensure the ambient temperature remains below 45 deg C.

Shielding and Signal Integrity:

To maintain high positioning accuracy, it is vital to use double-shielded cables for both the motor power and the resolver/encoder feedback. The motor cable shield must be grounded at the drive using a low-impedance EMC clamp. Route feedback cables in a separate conduit, maintaining at least 20 cm distance from power lines to prevent electromagnetic interference from causing positioning jitters.

Braking Resistor Selection:

For applications involving rapid deceleration or vertical "Z-axis" loads, an external braking resistor is highly recommended. The internal DC bus can only absorb a limited amount of regenerative energy from the 0.37 kW motor. An external resistor will prevent "Overvoltage" (OU) faults during aggressive braking cycles and protect the drive's power stage.