The G4OAC5A is an 3A AC Output Module, used to control or switch AC loads of 24 to 280VAC with 5VDC logic voltage. It provides up to 4000V (transient) of optical isolation between the field devices and the control logic. It is equivalent to a single pole, single throw, normally open contact (FORM A, SPST-NO, Make). It features zero voltage turn-on and zero current turn-off.