X20SM1446-1 B & R Automation
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The X20SM1446-1 is a stepper motor module by B & R Automation and is part of the X20 Fieldbus Input Output Modules series. It features one motor connection, supports supply voltages from 24 to 48 VDC with a ±25% tolerance, and handles a peak current of 10 Amps with continuous current up to 5 Amps. This module provides four digital inputs at 24 VDC and is configured for incremental encoders.
Internal Product Review
The X20SM1446-1 is a B & R Automation stepper motor module designed for precise motion control, with 24 to 48 VDC supply operation and 5 A continuous current. Incremental encoder support and four digital inputs give the module strong feedback capability and straightforward machine integration. A 10 A peak current rating makes the X20SM1446-1 a strong choice for demanding stepper applications.
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Product Description:
The X20SM1446-1 is a stepper motor module produced by B&R Automation for the X20 Fieldbus Input Output Modules series. It provides an interface between a controller and a two-phase stepper motor, allowing position control through pulse generation and encoder feedback while sharing the same backplane as other X20 modules. In an automation cell, the unit converts fieldbus commands into phase-sequenced drive currents so that the connected motor can index loads precisely without a dedicated stand-alone drive.
This module delivers a continuous phase current of 5 A and can supply short-term peaks up to 10 A for acceleration events. It accepts a motor supply of 24 to 48 VDC, and the onboard power stage tolerates line variations of ±25% without tripping. Four opto-isolated inputs operate at 24 VDC, and the total digital input count is 4, so the module can receive limit switch or home sensor signals. A selectable current reduction function lowers holding current after motion to limit thermal dissipation during dwell periods and help the module remain within enclosure temperature limits. By keeping motor phase current proportional to demand, wiring can be sized according to steady-state rather than peak values, which simplifies cabinet layout.
The hardware is a Stepper Motor Module and provides a single motor output, so the number of motor connections is 1. Position verification is supported through an integrated quadrature interface that accepts an Incremental Encoder, enabling closed-loop stall detection when higher accuracy is required. Because current reduction is handled internally, external resistors are unnecessary, which reduces panel components and simplifies wiring. This combination suits feeders, indexing tables, or light gantries that already employ the X20 backplane for distributed control.
