H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 10/00 (2006.01) G08C 15/10 (2006.01) G08C 19/02 (2006.01)
Patent
CA 2056866
ABSTRACT DATA TRANSMISSION SYSTEM The system enables data from analogue or state sensors S1 to S16, four of which may be direct frequency sensors, located in a ZONE 0 (1) environment, to be transmitted by a master transmitter 10 via a fibre optic data link 16 to a master receiver 14. The master receiver is located in a safe environment, The master transmitter comprises a power restrictor unit 18 which has for each data channel a power supply and also a power supply for the printed circuit-board (pcb) of the master transmitter. The master transmitter is located in a ZONE 1 environment. The analogue or state data are voltages which are converted by voltage-to-frequency converters mounted on the pcb and passed to the multiplexer of the master transmitter. The multiplexer feeds the fibre optic link and a demultiplexer at the master receiver reproduces the frequencies. The master receiver re-converts the frequencies to voltage signals. (Figure 1)
British Gas Plc
Gowling Lafleur Henderson Llp
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