Disaster prevention monitoring apparatus

A disaster prevention system and monitor comprising:

• a central station for transmitting command signals along signal lines;
• at least one repeater station connected to said signal lines for receiving said command signals and for transmitting status information signals onto said signal lines;
• control loads, control lines connected said control loads at said least one repeater station, and power lines adapted for supplying power to said control loads when connected to said control lines, said control lines normally being disconnected from said power lines;
• means at said at least one repeater station, responsive to a command signal including an address field designating said at least one repeater station and a command field designating that power is to be applied to said control loads, for connecting said control lines to said power lines;
• monitor means at said at least one repeater station for monitoring, when actuated, the state of said power lines and control lines when said power lines are not connected to said control lines;
• and
• means at said at least one repeater station, responsive to a command signal including an address field designating said at least one repeater station and a command field designating that said monitoring means should be activated, for actuating said monitoring means.