The Bently Nevada 3500/25M Enhanced Keyphasor Module is a half-height, two-channel module that converts inputs from proximity probes or magnetic pickups into digital Keyphasor signals for 3500 rack monitors, supporting up to four signals in standard or eight in paired configurations. It improves signal processing over the previous design while remaining fully compatible with legacy systems, replacing the older PWA 125792-01 module with the updated 149369-01 version.