Wireless communication using an intrinsically safe design...

Details Wireless communication using an intrinsically safe design... Wireless communication using an intrinsically safe design...

2007-12-25

2007-12-25

Nguyen, Phung T. (Department: 2612)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S657000, C361S001000

Reexamination Certificate

active

11242877

ABSTRACT:
A wireless circuit setup is used in a hazardous area where the circuit is intrinsically safe and does not require explosion proof containment. In this setup, an intrinsically safe master barrier (420) is used without the use of a resistor and one or more resistors (R1, R2, R3) are placed in at least one final barrier at the output end prior to the signal exiting the system. The use of resistors (R1, R2, R3) at the final barrier reduces the loss of power and speed. Optionally, in this setup, the antenna can be located remotely from the remaining components of the wireless transceiver. The antenna can also be connected the optional device using the same cable that shows the communication status information, such as transmit/receive status, signal strength, power, etc, in hazardous area.

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