La Telemecanique Electrique

Telemecanique

Jacky Pergent

Pierre Gohl

Olivier Penot

Jean Joly

Yves Oehlert

Jean Neyroud

Jesse T Quatse

Gilbert Barillier

Lionel Heitz

Gerard Gomez

Daniel Wojerz

Jean-Louis Lachenal

Bernard LeBlanc

Oliver Penot

Bernard Le Blanc

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.

Input or output device, for programmable automatic controllers to detect

A device for controlling and protecting outputs against overcurrents, in particular for programmable automatic controllers, comprises for each output channel a protection circuit connected by a single terminal to a power switch and to its control circuit. In the protection circuit a comparator compares with a threshold a voltage imaging the current in the output channel and disabling means are connected to a circuit for forcing the comparator input voltage. A common terminal is therefore used to monitor and to disable the output channel.

Output control and protection device, in particular for programmable

Programmable automatic controller having a configuration circuit

An input or input-output management circuit for a process control system such as a programmable automation is provided, including a serializing means with parallel inputs connected to input channels by filtering and threshold means, a series output of the serializing means being connected via a series connection equipped with an optocoupler and a filter to an input or input-output management unit.

Input management circuit particularly for a programmable automation

An input/output device monitors the transmission of information between a processor of a programmable controller and sensors and actuators of a process to be controlled. This device includes electronic circuits adapted for calculating the parities of the digital words which pass therethrough, these parities being compared with corresponding parities calculated by the processor which thereafter invalidates the words having two different parities.

Error control apparatus using restore memory for recovering from parity

Method and apparatus for protecting and monitoring the transmission of

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.

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

Input/output device for an apparatus of the programmable auto-control

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Carros Le Neuf, France

Jacky Pergent