Schneider Electric's Square D 9050BO-3D AC Pneumatic Timing Relay is a BO-type unit in the Class 9050 family of pneumatic timing relays, designed for AC operation in industrial control applications. It uses a pneumatic timing mechanism to generate a timed delay in response to an input signal, a defining feature of 9050 AC pneumatic timers. As part of the 9050 family, BO and CO types cover different contact configurations, and the line also includes plug-in JCK timers to fit a variety of panel layouts.
