Abstract: An emergency power shutdown management system (EPSMS) comprises a programmable logic controller (PLC), relays coupled to the outputs of the PLC for shutting down electrically operated equipment, and indicators for indicating the status of the EPSMS and the controlled equipment. The PLC receives input signals from a fire control panel including a 2nd alarm signal which is generated after the fire control panel has detected smoke, fire or an explosion with two or more detectors and a system discharge signal which is generated when the fire control panel triggers fire sprinklers or the release of other fire or explosion suppression agents. The PLC also receives an emergency power off (EPO) signal from an EPO switch which is activated to immediately shut down all electrically operated equipment and power distribution units in a protected area.

Abstract: An emergency power shutdown management system (EPSMS) comprises a programmable logic controller (PLC), relays coupled to the outputs of the PLC for shutting down electrically operated equipment, and indicators for indicating the status of the EPSMS and the controlled equipment. The PLC receives input signals from a fire control panel including a 2nd alarm signal which is generated after the fire control panel has detected smoke, fire or an explosion with two or more detectors and a system discharge signal which is generated when the fire control panel triggers fire sprinklers or the release of other fire or explosion suppression agents. The PLC also receives an emergency power off (EPO) signal from an EPO switch which is activated to immediately shut down all electrically operated equipment and power distribution units in a protected area.