The Allen-Bradley 4100-ESRS Encoder Signal Reference Simulator is a Rockwell Automation test instrument that generates configurable encoder reference signals to validate encoder feedback paths in motion control systems (FRN 1.12). The ESRS unit can produce configurable quadrature-like encoder outputs at selectable frequencies, enabling realistic bench testing of axis configurations without a live motor. Typical applications include simulating motor encoder feedback to verify drive and controller wiring, tuning, and compatibility before commissioning.
