Patent ID: 7456728

Claim:
A fire-alarm control panel having power frequency carrier, comprising: a main signal control panel comprising a signal T/R (transferring/receiving) unit and a transforming unit, said transforming unit comprising a signal I/O (input/output) module, a single-chip control module, a power carrier module and a power I/O module, said signal I/O module connecting to said signal T/R unit, wherein said power carrier module is configured to modulate an alarm signal and then transfer said alarm signal to said power I/O module, said power I/O module being configured to transfer said alarm signal to another, remotely located fire-alarm control panel; at least one detecting unit, said detecting unit connecting to said signal T/R unit to transfer detected signals to said signal T/R unit; at least one warning unit, said warning unit connecting to said signal T/R unit, said warning unit showing signals received from said signal T/R unit; an indoor power unit connecting to said power I/O module; and an emergency power unit connecting to said power I/O module.