Module with isolated analogue inputs having low leakage current

Details Module with isolated analogue inputs having low leakage current Module with isolated analogue inputs having low leakage current

2011-08-09

2011-08-09

Tsai, Henry W (Department: 2184)

Electrical computers and digital data processing systems: input/

Input/output data processing

Input/output access regulation

C710S008000

Reexamination Certificate

active

07996587

ABSTRACT:
A module with isolated analog inputs for a programmable controller, the module including plural input pathways that are each isolated with aid of at least one optical isolation static relay controlled selectively with the aid of a controller. The module further includes a multiplexer including plural channels each controlled to open or to close, a channel of the multiplexer being placed in series with an isolated input pathway of the module.

REFERENCES:
patent: 4821167 (1989-04-01), Wiebe
patent: 5083288 (1992-01-01), Somlyody et al.
patent: 5323014 (1994-06-01), Liscio et al.
patent: 6163600 (2000-12-01), Miyake et al.
patent: 6376851 (2002-04-01), Worley
patent: 2003/0074214 (2003-04-01), Kelliher
patent: 2008/0249385 (2008-10-01), Phan
patent: 2008/0252257 (2008-10-01), Sufrin-Disler et al.
patent: WO 01/88644 (2001-11-01), None

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