Reliance 57411-2E Resolver Input Module

The Reliance 57411-2E Resolver Input Module is a legacy Reliance Electric I/O card designed to accept signals from a resolver position sensor and present decoded feedback to a compatible PLC system; the part is commonly cataloged as 57411-2E and is sometimes shown in listings as 0-57411-2E or O-57411-2E, with an alternative designation seen in product images as 57C411. Verified distributor pages align on the model number and identify it explicitly as a Resolver Input Module, and multiple sources note the part’s discontinued/obsolete status while offering refurbished units for legacy control systems. In related records, the module is associated with revision or data codes such as D-3640, and it is documented in catalogs and spare-parts listings under Reliance Electric, reflecting its provenance in older automation platforms. This module’s core purpose is to serve as the input interface for resolver-based feedback within Reliance/Automax and similar legacy control architectures, providing a dedicated path for resolver signals to reach the PLC’s I/O system. For buyers maintaining vintage equipment, the 57411-2E remains a recognizable, if scarce, option and is frequently sourced through surplus or refurbish-focused vendors, rather than new production channels.