Reliance Electric 57C411-2E Resolver Input Module

The Reliance Electric 57C411-2E Resolver Input Module is an AutoMax DCS 5000 backplane input module that converts rotary-resolver position into a digital signal for the control system. It delivers 12-bit position data per revolution with a 2-bit revolution counter, enabling accurate shaft-angle tracking across up to four revolutions for precise velocity and position feedback in servo-driven applications. The module provides a 26 V rms, 2381 Hz sine-wave reference output to drive the resolver, capable of handling a 400 ohm load, while the resolver itself supplies 11.8 V rms sine and cosine signals back to the module for conversion to a digital position value. Transformer isolation helps minimize ground-loop issues, and a programmable update period lets you sample as fast as 500 microseconds or as slow as 32.767 seconds, balancing responsiveness with system-wide timing constraints. An external strobe input allows synchronization with other equipment or events in the automation sequence, and a 5-LED faceplate offers quick at-a-glance status indicators. This module, identified in the J-3640-1 instruction context and compatible with Reliance Electric AutoMax configurations, is designed to capture angular position information for shaft-position monitoring, velocity estimation, and precise rotary-axis control in automated manufacturing and material-handling environments.