Range of input/output devices for an apparatus of the programmab

Details Range of input/output devices for an apparatus of the programmab Range of input/output devices for an apparatus of the programmab

1987-02-13

1988-05-03

Kucia, R. R.

Electricity: electrical systems and devices

Miscellaneous

361413, H05K 118

Patent

active

047424338

ABSTRACT:
An input card (7) is put in communication with apparatuses (16) the operation of which is to be monitored in order to initiate certain operations. A terminal-box (13) is interposed between the card (7), which possesses detector circuits (17), and the members (16).
The two ends of each circuit (17) are associated with a respective inner terminal (12) of the terminal-box (13), and the two ends of each member (16) are associated with a respective outer terminal (14) of the terminal-box (13). Shunts (19,21) mounted in the terminal-box and connected to supply terminals (14a,14b) put one of the ends of each circuit (17) or member (16) at a common potential. The other terminal of each member (16) is connected to the other terminal of a circuit (17) by means of a connection (18).
The invention is used to avoid the need for auxiliary terminal-boxes and cards with a common potential point.

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patent: 4658333 (1987-04-01), Grimes

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