SU1578727A1 - Device for selecting relay of transmitters and signalling - Google Patents

Abstract

The invention relates to automation and information transfer in automated process control systems of industrial enterprises. The aim of the invention is to simplify and extend the functionality by controlling the operation of the relay. To do this, a device containing a control panel, which is made of N pairs of call keys, positive and negative polarity buses, N relay pairs with closing contacts, N diode pairs and a communication line, has an alarm bus, code buses, current limiting a resistor, LEDs and resistors by the number of keys, and each relay is supplemented by a make contact. When the sensor is called, the call key is moved to the second position, the corresponding relay is activated and the corresponding LED is turned on, confirming the call is correct. 2 Il.

Description

The invention relates to automation and information transfer in automated process control systems of industrial enterprises.

The aim of the invention is to simplify the device and extend the functionality by controlling the operation of the relay.

Fig. 1 is a schematic diagram of the proposed device for invoking sensors with five code buses and one alarm bus in a communication line; FIG. 2 is a control panel diagram.

The device contains a control panel 1, communication lines 2-6, alarm buses 7 f, relay 8-27, diodes 28 47, closing contacts 48-67 relays

The control panel 1 is made of a positive polarity bus 68 and a negative polarity bus 69, code buses 70–74, alarm bus 75, sensor call keys with closing contacts 76–115, and a current limiting resistor 116, LEDs 117–136, resistors 13U- 156 and power supply terminals 157 and 153.

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The device works as follows.

When calling a sensor (for example, the first), we transfer its call key from the first (initial) position to the second, as a result of which the closing contacts 76, 96 are closed. Through the closing contact 76, a positive potential is applied to the anode of the LED 117 and to the code bus 70, from which via line 2 it goes to the first output of the relay coil 8. Through the closing contact 96, the negative potential from the bus 69 goes to the code bus 71, and via the communication line 3 and the diode 28 to the second output of the relay coil 8 As a result of this, relay 8 triggers and closes its contacts in the measuring circuits of the first sensor and closing contact 48 in the alarm circuit. Negative potential is transmitted through diode 28 and pin 48 to communication line 7, to signaling bus 75 and through resistor 1CH37 to another output of LED 117, as a result of which it shines, confirming the call has been made. The light-emitting diode 117 - resistor 137 plays the role of a decoding element, one input of which has a positive potential from the code bus 70, and the other from the code bus 71 via a link 3 through a diode 2 make contact 48, a relay 8, a link 7 and signaling bus-75, the signaling code, when the device is operating properly, always corresponds to the sensor's call code. If it does not match, the signal will not be received on the control panel.

After receiving the information, the call key is reset. The supply of potentials on lines 2 and 3 of the connection is stopped, and the relay 8 returns to the initial state.

Claims (1)

Invention Formula A device for selecting sensors and alarm call relays containing a control panel which is made of n pairs of call keys, the first terminals of the first make contacts of the first call keys of each pair are connected to the positive polarity bus, 1 the first leads of the first contacts of the second call keys of each pair connected to the bus otritsa Q $ 0 5 o Q five body polarity and to the first output of the power source; the second pins of the first make contacts of the first and second call keys of each pair are combined; n pairs of diodes and n pairs of relays, in each of the pairs of relays the first terminal of the winding of the first relay is connected to the first terminal of the winding of the second relay, the second terminals of the first and second; relays of each pair are connected respectively to the anode and cathode of the first and second diodes of the same-named pair, each of which contains the cathode of the first diode to the anode of the second diode, characterized in that, in order to simplify and expand the functionality of the device by controlling the operation of the relay, An alarm bus, code buses, a current-limiting resistor and LEDs and resistors are entered into the control panel by the number of call keys, each relay is supplemented by a closing contact, and each call key is supplemented by a second By the closing contact, in the control panel in each group of call keys, the first terminals of the second closing contacts of the first and second call keys are connected respectively to the negative polarity bus. and with a positive polarity bus, which is connected to the positive terminal of the power source through a current limiting resistor, the second terminals of the second closing contacts of the first and second call keys in each pair are combined, the second terminals of the first closing contacts of the first switches are connected to the anodes of the corresponding LEDs, whose cathodes are connected to the signaling bus through corresponding resistors, the second terminals of the first closing contacts of the second call keys are connected to the cathodes of the corresponding LEDs One, the anodes of which are connected to the signaling bus through the corresponding resistors, the second terminals of the first closing contacts of the first call keys of the control panel pairs are connected via the corresponding code buses to the first terminals of the windings of one of the same-name relay pairs, the second terminals of the second closing contacts of the first call keys of the control panel are through the code bus is connected to the cathodes of the first diodes one51578727. nominal pairs of relays, an alarm busbar, the second terminals of which are connected to the control panel are connected to the first with the second winding terminals — their own terminals of the closing contacts of the real relays. X w I FIG. /