R4500601131 is a heavy-duty incremental encoder ring kit designed for NEMA 4-1/2" C-face motors, featuring a thin 5/8" profile that saves valuable space. The encoder provides 60 PPR (pulses per revolution) resolution with optional 120 PPR output, supporting single-channel unidirectional (A) or dual-channel quadrature (AB) output formats with 90° ± 45° electrical phasing. It operates over an input power range of 4.5 to 26 VDC (depending on output configuration) with a maximum frequency response of 10 kHz, and includes electrical protection against overvoltage and reverse voltage to 30 VDC. The unit features a cast aluminum housing with chromate finish, 1010 steel gear, and operates reliably at shaft speeds up to 5,000 RPM with a maximum operating temperature range of -40 to +85 °C. This encoder is ideal for industrial motor control, speed monitoring, and position feedback applications where dependable performance and easy field serviceability are required.