National Instruments ISM-7401

The National Instruments ISM-7401 Integrated Stepper is designed for use with the NI-7330, NI-7340, and NI-7350 motion controllers, providing a robust solution for a wide range of automation and control applications. Operating within a voltage range of 12 VDC to 60 VDC, the ISM-7401 offers versatility and compatibility with various power sources. Its advanced control capabilities enable operation at a frequency of 16 kHz using Pulse Width Modulation (PWM), ensuring precise motor control while minimizing acoustic noise. The unit features digital inputs that support voltages from 4 VDC to 30 VDC, enhancing its adaptability to different control environments.

To safeguard your motor and connected systems, the ISM-7401 integrates comprehensive protection features, including alarms for under-voltage at 10 VDC and an over-voltage shutdown that activates when supply voltage exceeds 75 VDC. Additionally, an over-temperature shutdown kicks in at 85 °C (185 °F), promoting safe operation. Proper airflow, particularly through a fan in environments without adequate ventilation, is essential to prevent overheating, especially in high ambient temperatures over 40 °C (104 °F). The ISM-7401 is available in three variants: ISM-7401 (single shaft), ISM-7401D (dual shaft), and ISM-7401E (dual shaft with a 1000-line incremental encoder). When mounting multiple units, maintaining at least half an inch of space between them is recommended to avoid interference.

The digital output of the ISM-7401 indicates fault conditions, allowing for connection to external devices such as LEDs, relays, or Programmable Logic Controllers (PLCs). The output transistor's connector provides easy access to configure either current sourcing or sinking for enhanced flexibility. With dimensions of 2.22 in. x 3.35 in. x 3.35 in. and a weight of 30 oz, the ISM-7401 is compact yet powerful. It is backed by a three-year warranty, and additional technical resources and manuals are available for download in PDF format to support users in maximizing the device's functionality.