Definition of emergency off circuit (EMO)

1. in facilities and safety, a control circuit that, when deactivated, places the equipment into a safe shutdown condition and will restrict all hazardous potentials to the main power enclosure. This is a condition in which all hazardous voltage has been removed from the equipment, all hazardous production materials flow has been stopped, any radiation sources have been de-energized or totally contained, any capacitors have been grounded, all moving parts stopped, internal and external heat sources shut off, and the equipment presents minimum hazard to personnel or the facility. [Adapted from SEMI S2-93]