Product Overview

The X67SM4320 (X67SM4320) is a high-density, field-mounted stepper motor control module designed for decentralized automation environments. It is capable of independently managing up to four 2-phase bipolar stepper motors. Operating at a rated voltage of 24 VDC, this module provides a continuous motor current of 1.0 A per channel, with a peak capacity of 1.5 A. As part of the X67 system, the X67SM4320 is engineered for "on-machine" installation, eliminating the need for large control cabinets by providing IP67-rated protection and direct M12 connectivity for multi-axis motion applications.

Technical Configuration

The hardware architecture of the X67SM4320 features four integrated full bridges, specifically optimized for driving bipolar stepper motors. The module supports precise current control and includes dedicated "Motor active" status LEDs for each channel, providing immediate visual diagnostics of the motion state. With a B&R ID code of 0x1DCC, the module is seamlessly recognized within the Automation Studio environment. Its compact dimensions (8.5 x 5.3 x 4.2 cm) allow it to be mounted in tight spaces on robotic arms, conveyor systems, or packaging machinery, while its 24 VDC ±25% tolerance ensures stable performance even in power systems with significant voltage fluctuations.

Technical Specifications

Technical FAQs

Can this module drive unipolar stepper motors?

The X67SM4320 is designed specifically with full-bridge outputs for 2-phase bipolar stepper motors. While some 6-wire or 8-wire unipolar motors can be wired in a bipolar configuration (series or parallel), you must ensure the electrical parameters match the 1.0 A continuous current rating of the module.

Does the module support microstepping?

Yes, the X67 series stepper modules typically support microstepping to ensure smooth motion and reduce mechanical resonance. Configuration for steps and current limits is handled through the hardware parameters in the automation software.

What is the significance of the 1.5 A peak current?

The peak current allows the module to handle brief high-torque demands, such as during the acceleration phase of a move. However, to prevent thermal shutdown or damage, the long-term effective (RMS) current must not exceed the 1.0 A continuous rating per channel.

Engineering & Installation Guide

• Wiring and M12 Connectors: Use high-quality shielded cables for motor connections to minimize electromagnetic interference (EMI). Given the PWM nature of stepper drives, unshielded cables can radiate noise that may interfere with nearby sensors or communication lines. Ensure M12 connectors are tightened to the correct torque to maintain the module's environmental seal.

• Heat Dissipation: Although the module is designed for field mounting, the internal full bridges generate heat when driving four motors at their rated current. Mount the module on a metal surface if possible to act as a heat sink, and ensure there is sufficient ambient airflow to stay within the -25 to 60°C operating range.

• Voltage Supply Stability: The 24 VDC ±25% range is generous, but stepper motor performance (especially high-speed torque) is highly dependent on a stable supply. Use a dedicated 24V power segment for motion modules to prevent voltage drops caused by other inductive loads in the system.