Input or output device, for programmable automatic controllers t

Details Input or output device, for programmable automatic controllers t Input or output device, for programmable automatic controllers t

1992-09-03

1996-12-10

Treat, William M.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific quantity comparison means

340661, 340664, H03K 170812, G05F 1573, H02H 326

Patent

active

055837310

ABSTRACT:
A device is adapted to be associated with a group of input or output channels, especially of a programmable automatic controller, to detect if the channels are subject to an open circuit and/or an overcurrent. To each channel are assigned two analog comparators connected to a processor logic circuit which connects one or the other comparator output to a control unit. Configurator logic activates or deactivates one or the other of the comparators and associated forcing devices and filters according to the operating mode selected.

REFERENCES:
patent: 4628397 (1986-12-01), Gareis et al.
patent: 4631623 (1986-12-01), Gohl
patent: 4736340 (1988-04-01), Desserrieres et al.
patent: 4774656 (1988-09-01), Quatse et al.
patent: 4951250 (1990-08-01), Cruickshank et al.
patent: 4965800 (1990-10-01), Farnbach
patent: 5007042 (1991-04-01), Santi
patent: 5062072 (1991-10-01), Gohl et al.
patent: 5432945 (1995-07-01), Pergent et al.

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