Product Overview

The EVS9321-EIV004 (EVS9321-EIV004) is a high-performance Servo PLC from the Lenze 9300-Series, merging the capabilities of a precision servo inverter with an integrated, freely programmable PLC (IEC 61131-3). Delivering a rated power of 0.37 kW, this "EIV" variant is specifically engineered for decentralized intelligence in complex automation systems, such as pick-and-place robotics, laboratory automation, and specialized pharmaceutical packaging. By offloading motion control logic directly to the EVS9321-EIV004, engineers can reduce the processing burden on the central PLC and achieve sub-millisecond response times for local control loops. Despite its phase-out status, this German-engineered drive remains a vital solution for maintaining sophisticated legacy machinery, offering an IP20-rated protection and a slim 7.80 cm chassis that allows for high-density cabinet integration without sacrificing processing power.

Technical Configuration

The EVS9321-EIV004 features a hardware architecture designed for high-speed deterministic control, supporting various motion profiles from simple positioning to complex electronic gearing. The "Servo PLC" designation indicates that the unit possesses its own internal memory and CPU for executing user-defined logic programs, supporting all standard IEC 61131-3 languages. It comes equipped with a system bus (CAN) as standard, allowing for seamless synchronization between multiple drives in a networked environment. The power stage is designed for high overload capacity and precision torque regulation, while the modular interface design allows for the addition of various fieldbus communication modules (PROFIBUS, INTERBUS) or high-resolution encoder feedback systems.

Technical Specifications

Technical FAQs

What is the advantage of a "Servo PLC" like the EVS9321-EIV004 over a standard servo drive?

The Servo PLC contains its own logic engine, meaning it can handle sensor inputs and execute complex sequences (like homing, positioning, and safety logic) independently of a central controller. This enables faster cycle times and allows the drive to function as a standalone control unit for small machines.

Which software is required to program the internal PLC?

The 9300-Series Servo PLC is typically programmed using the Lenze Drive PLC Developer Studio (DDS), which supports the five standard IEC 61131-3 programming languages, including Ladder Diagram (LD) and Structured Text (ST).

Can I replace a standard EVS9321-ES (Servo Inverter) with this EIV (Servo PLC) model?

While the power ratings and physical dimensions are compatible, the EIV model requires a PLC program to function. If you are replacing a standard inverter, you must ensure the logic is appropriately configured to handle the motion commands that were previously managed by an external controller.

Engineering & Installation Guide

For the EVS9321-EIV004, ensure vertical mounting in a well-ventilated control cabinet with at least 100 mm of clearance above and below to prevent thermal saturation of the 0.37 kW power stage. Since this unit handles both power and logic, electromagnetic compatibility (EMC) is paramount; separate the 24 VDC control wiring and communication cables from the high-voltage motor cables. Use 360-degree shield clamps for the motor cable at the drive's EMC plate to minimize high-frequency emissions. When commissioning the internal PLC, verify that the task cycle times are set appropriately to ensure deterministic motion control. For systems operating in high-vibration environments, ensure all terminal connections are torqued correctly and that the drive is securely fastened to a rigid, grounded backplane to prevent mechanical stress on the internal electronic boards.