AT294202B - Selection circuit with a plurality of inputs, occasionally assigned with signals, and an equal number of outputs each assigned to an input - Google Patents

Description

  

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  Selection circuit with a plurality of inputs, occasionally assigned with signals, and an equal number of one each
Outputs assigned to the input
 EMI1.1
 

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 Adjustment windings protect diodes. If several relays are activated at the same time during a setting process, the contacts in series ensure that the output signal is only given at the first of the activated contacts.



   The inventive device of bistable two-winding relays has the advantage that no holding circuits are necessary for the relays, since the setting windings and the reset windings of the relays are only energized with pulses and remain in the position once assumed until the respective other winding of the relay is excited.



   The exact function of the circuit is explained using examples.
 EMI2.1
 Contacts lying in series-si .... sn-any further changes to the setting windings-Ei .... Eji-remain unconsidered. The response speed is only dependent on the release time of the latching relay, u. between only one, since no other relay can respond after an interruption.



   FIG. 2 shows a circuit variant in which the reset is actuated by a common reset winding - RS. In terms of effect, it is irrelevant whether this reset acts on the contacts via mechanical elements or causes a magnetic reversal that encompasses all relays.



   The variant shown in Fig. 3 only uses normally open contacts with adhesive characteristics and is especially intended for use with "reed" relays ("Ferreed", "reed" with contact tongues made of permanent magnets that can be reversed, etc.). It is essential that the two setting windings of the relays - A and B - are jointly under the influence of the setting signal, regardless of whether they are connected in series (Fig. 3) or in parallel, or when resetting the two reset windings together under the influence of the Reset signal. An adjustment signal causes in common
 EMI2.2
 All circuits (Fig. 1 .... Fig. 3) are connected in series with the coils diodes in order to avoid coupling of the setting lines or to lock them off when the polarity of the input voltage changes.

 

Claims (1)

P A T E N T A N S P R Ü C H E: 1. Selection circuit with a plurality of inputs, occasionally assigned with signals, and an equal number of outputs each assigned to an input, in which an arrangement is provided for each input to select an output assigned to one of several simultaneously assigned inputs EMI2.3 Two-winding relays are whose setting windings are each in a setting circuit excited by a signal when the assigned input is occupied and their reset winding in a separate, occasionally switched through reset circuit, with working contacts of each relay arrangement in the output circuit led via the associated output and further contacts in a blocking circuit for Prevention of the simultaneous response of several relay arrangements are switched, that these contacts represent normally closed contacts and are in series in a circuit over which all setting circuits are routed in parallel via decoupling diodes. EMI2.4 Normally open contacts and normally closed contacts are each combined to form changeover contacts, and that the relay arrangements each consist of a single relay which have the above changeover contacts. EMI2.5 Relay arrangements each consist of two relays, one relay only having the normally open contact and the other relay only having the normally closed contact. <Desc / Clms Page number 3> EMI3.1 Reset windings of the relays are combined into a common reset winding, which can be actuated via a single reset input.