Johnson Controls EDA-2040-61 Electric Motor Actuator, 1/2" Coupler Size, 5.5 Minute Rotation Time, No Switch Kit The EDA-2040 Electric Motor Actuator, EDA-2040-102 Switch Kit, and DPT-2015 Differential Pressure Transmitter can be ordered and installed separately. However, they are usually used together for incremental damper control and transmission of differential pressure within VAV systems.