the M511-1/2 is the designated direct replacement for the M511B-1/2 model

Industrial Build Quality: Features a corrosion-resistant housing and robust internal gearing to ensure consistent 10 in-lb torque delivery

ensuring an exact physical and electrical fit

40VA rating provides sufficient overhead for modern digital thermostats and multiple stage contactors

When installing this furnace draft inducer

Aaon R70320 Drive 322057-301 the M511-1/2 is the designatedThe Aaon R70320 Drive is a high performance 1HP 480V VFD engineered for precision motor control in commercial HVACR applications. Utilizing the robust Yaskawa V1000 platform, this variable frequency drive provides exceptional reliability for Aaon air handling units and rooftop systems. Designed for three phase induction motor regulation, it optimizes energy consumption by adjusting motor speed to meet real time demand. The compact microdrive design