SU362494A1 - • SESOYUZKAYA - Google Patents

Description

one

The invention can be used in switching devices used in systems of measuring technology, automation and remote control.

Known relay switches, built according to the scheme of the push-pull shift register, contain a common blocking bus and two control buses, which receive clock pulses, causing alternate switching on of the switching relays. One winding terminal of each relay is connected through a normally open contact of the previous relay with an appropriate control width and through its normally open contact with a blocking pin connected to one pole of the power source, and the second output is connected via a normally closed contact of the next relay to a different pole power source.

However, in the known switches failures in the operation of one of the switching elements may lead; to the disruption of the functioning of the entire switch.

In order to increase the reliability of the proposed relay switch, additional relays are introduced, each of which is connected via an isolating diode between the winding terminal of the previous switching relay connected to the control bus and the winding terminal of the next relay connected via a normally closed contact to the power supply. The switching relays are connected to the blocking bus by means of normally open contacts of additional relays.

The switching of the "following" signals is carried out over three channels. In two channels, the switching frequency is a multiple of two with respect to the frequency in the third channel and is shifted in time by the duration of the switching on of the switching relay.

The drawing shows a circuit diagram of the proposed relay switch.

The switch contains switching relays / 1, ..., Ai, additional relays 2i, ..., 2, diodes 5i, ..., 5ii, which are used for isolating the power supply circuits of the relay. The switch is controlled by clock pulses that are shifted in time and arrive at w and 5. Bus 6 is blocking for all relays. The device is started by applying a pulse to the input 7.

The triggering pulse switches on relays / i p 2i which, through normally open contact 8 of relay 2i, self-block. When a clock pulse appears on the bus through a closed normally open contact 9 of relay L

turn on and become self locking

relay / 2 and 22; in this case, the relay li is unlocked by means of a normally closed contact 10 of the relay Iz, connected to the power supply circuit of the relay - / 1. Relay 2i remains on.

However, if the relay / g releases its contacts, then through the blocking contact 8 and the normally closed contact 10 a power supply circuit for the relay li is created. The latter is triggered and, through its normally open contact, again provides a clock pulse to the relay / 2. Malfunctions of relays 2i and 2 also will not lead to disruption of the switch. Relay 2i is turned off when relay 1z and 2z are activated by the corresponding impulse to bus 4. In the future, the circuit operates in a similar way.

The switching frequency of the signals using the contacts of the switching relay / i- / „is equal to the frequency of the arrival of clock pulses. With the help of contacts of additional relays T phggatGBGYSTYA ut G1TuIOTlfi with frequencies less than% dya1} aza: ZO1

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subject matter

Relay switch, built according to the scheme of push-pull shift register, containing a common blocking bus connected to one power supply pole, two control buses switching relays, one winding terminal of each of which through a normally open contact of the previous relay

connected to the corresponding control bus, and the other output through a normally closed contact of the subsequent relay is connected to another pole of the power source, characterized in that, in order to increase reliability, between one winding terminal of each previous switching relay and the other winding terminal of each subsequent relay through development the auxiliary diode is switched on an additional relay, with one winding lead of each switching relay connected to the unit through a normally open contact of the corresponding ground-voltage relay rovochnoy bus.

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