The OAC24 is a Standard AC Output Module with rugged construction used for controlling or switching AC loads. It provides up to 4000 volts (transient) of optical isolation between the field devices and the control logic. AC output modules are equivalent to a single pole, single throw, normally open contact (FORM A, SPST-NO, Make). Typical applications for AC output modules include switching loads such as relays, solenoids, motor starters, heaters and lamps or indicators.