Patent ID: 8744264
Filing Date: 2014-06-03
Classification: G08B,H04B

Abstract:
1. An optical signal converter connecting multiple detectors/transmitters and an R/GR fire alarm control panel and connecting multiple fire safety equipments and the R/GR fire alarm control panel such that a plurality of optical signal converters including the optical signal converter be coupled in daisy-chain, the optical signal converter comprising: an upstream signal path for electrically combining an electric signal, which is electrically converted from an optical signal optically received from a next optical signal converter connected in the daisy-chain, and an alarm signal, which is originated from at least one of the multiple detectors/transmitters, so as to output an optical signal optically converted from the electrically combined signal; a downstream signal path for electrically converting an optical signal optically received from a previous optical signal converter connected in the daisy-chain into an electrically converted signal, and then for optically reconverting the electrically converted signal so as to output the optical signal to the next optical signal converter; and an I/O port connected to the upstream signal path and providing the alarm signal received from the at least one of the multiple detectors/transmitters to the upstream signal path, the I/O port further connected to the downstream signal path and externally outputting the electrically converted signal from the downstream signal path to at least of the multiple fire safety equipments, wherein the optical signal passing through the upstream signal path is eventually destined to the R/GR fire alarm control panel through the daisy-chain, and wherein the optical signal passing through the downstream signal path is originated from the R/GR fire alarm control panel, wherein the upstream signal path comprises: wherein the upstream branch comprises a packet encoder for producing the electrically combined signal when the electric signal from the first optical input port and the alarm signal from the at least one of the multiple detectors/transmitters arrive simultaneously, the packet encoder outputting the electrically combined signal to the first optical output port, wherein the downstream signal path comprises: wherein the downstream branch comprises a detection circuit detecting a control signal in the electrically converted signal from the second optical input port to be transmitted to one of the multiple fire safety equipments, the detection circuit outputting the control signal to the I/O port, wherein the I/O port comprises: wherein the R/GR fire alarm control panel comprises: