Intrinsically safe barrier and field bus system

Details Intrinsically safe barrier and field bus system Intrinsically safe barrier and field bus system

1996-08-20

1998-11-10

Le, Amanda

Pulse or digital communications

Cable systems and components

34031001, 340660, 340664, 361 58, H04B 300

Patent

active

058355340

ABSTRACT:
In a field bus system for performing communication between at least one field device and at least one higher-rank apparatus which are connected on a field bus transmission line constituted by a pair of transmission lines, an intrinsically safe barrier disposed between a hazardous area and a safe area on the transmission line in order to limit energy to be used in the hazardous area, the intrinsically safe barrier comprising impedance converting circuits provided in the barrier for reducing impedance in a frequency band of communication data.

REFERENCES:
patent: 3973170 (1976-08-01), Hogan
patent: 5144517 (1992-09-01), Wieth
patent: 5684831 (1997-11-01), Moller
Pepperl & Fuchs, three sheets.
MTL700 Series, 1994-95, pp. 35 and 36.

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