RELIANCE 57411-2F Resolver Input Module

The 0-57411-2F Resolver Input Module is an AutoMax PLC I/O card originally manufactured by Reliance Electric (also cataloged as 57411-2F, O-57411-, and 57C411). It accepts resolver position feedback from a rotary shaft to provide precise angular data to the control system, enabling accurate shaft position and velocity monitoring in motion-control applications. The module delivers 12-bit resolution per revolution plus a 2-bit revolution counter, allowing multi-turn tracking of shaft position, with sample rates from as fast as 500 microseconds to as slow as 32.767 seconds per measurement. Its faceplate includes a female connector socket and five LED status indicators for at-a-glance diagnostics, while the terminal block carries resolver interface signals such as -TRIG+, -COS+, and -SIN+. Typical uses include servo and motor-control loops in automation equipment, CNC machines, and robotic systems that rely on resolver feedback for precise control. This AutoMax resolver input module is described by distributors and repair catalogs as no longer produced by the original manufacturer, though you may still find refurbished or used units from specialized suppliers.