SU869049A1 - Relay flip-flop - Google Patents

Description

(54) RELAY TRIGGER

I

The invention relates to a pulse technique and can be used in systems of remote and automatic control, in particular, in the construction of control systems for process units.

Known trigger containing a remote switch, thyristor, diodes, capacitors, resistor

The disadvantage of the trigger is low reliability due to the possible effect of a sticking of the switching contact during rattling due to the short duration of the switching pulse or due to strong interference.

A trigger is also known, containing a remote switch, two relays and two RC circuits.

The disadvantage is low reliability due to the effects of contact sticking, as well as high hardware costs when building registers based on it, which is due to its circuit diagram, which could be common when building multi-bit registers.

The purpose of the invention is to increase the reliability of the relay trigger and reduce hardware costs when building registers based on it.

The goal is achieved by the fact that in a relay trigger containing a remote switch and the first and second relay relays with RC circuits

10 release delays, which are connected in parallel to their windings, the first outputs of which are connected to the first power bus, have two generators for a relay, an anti-drop relay, and re 5 sistor, and the first output of the first winding of the remote switch is connected via a series circuit from the remote contact breaker and disconnecting contact

20 of the first delay relay is connected to the second winding of the second delay relay, the first terminal of the second winding of the remote switch is connected to the second winding terminal of the first relay through the contact contact of the remote switch and the break contact of the second delay relay, the closing contact of the anti-drop relay is connected to the second power bus, the second terminals of the remote switch windings are connected through the closing contacts of the generators relay to the first power bus, the first terminals of the windings of the first and second generators relay through the closing contacts of the corresponding delay relays are connected to the second power bus, the second windings of the generators relay are connected to the first rail of the generator, the first winding terminal of the anti-drop relay is connected to the first to the power bus, the second output is connected through a resistor to the second power bus s parallel to the winding of the antidecause relay, the disconnecting and closing contacts of the remote breakers in parallel connection.

FIG. 1 is a schematic diagram of a relay trigger; in fig. 2 - register scheme for 16 bits.

In accordance with FIG. 1 relay trigger contains a remote switch 1 with opening contacts 1.1, 1.2, closing contacts 1.3 and 1.4 with relay 2 delay with opening contact 2.1 and closing contact 2.2, relay 3 delay with opening 3.1 and closing 3.2 respectively, parallel to their windings RC- the release delay circuits from resistors 4 and 5 and capacitors 6 and 7. The first terminals of the windings of the relay 2 and 3 delays are connected to the first power supply bus 8. The trigger also contains two generators on relay 9 with contacts 9.1 and 10 with contact 10.1 of the standard pulse pair type, anti-drop relay G1 and resistor 12. First winding pins of remote switch 1, which are inputs J3 "14 flip-flop, through series circuits from the break contact I. I remote switch 1 and disconnecting contact 3.1 relays 3 delays and closing contact 1.3 remote switch 1 and disconnecting contact 2.1 relays 2 delays connected to the second terminals of relays 2 and 3

delays, respectively. The connection points of contacts 1.1 and 3.1, 1.3 and 2.1, which form successive circuits, are interconnected and are connected via a closing contact 11.1 to the second power bus 15 by means of an anti-drop relay 11. In the second, the outputs of remote switch 1 are connected via make 9.1 and 10.1 of the generators to relays 9 and 10 to the first bus

8 pitani. The first terminals of the relay coils

9 and 10 generators through the corresponding closing contacts 2.2 and 3.2 relays 2 and 3 delays are connected to the second

swarm tire. 15 power, and the second terminals of the windings of the relay 9 and 10 generators are connected to the first power bus 8. The first terminal of the winding of the anti-hang relay I1 is connected to the first power supply bus 8, the second output is connected through the resistor 12 to the second power bus 15. Parallel to the winding of the anti-drop relay 11, the disconnecting 1.2 and closing 1.4 contacts of the remote switch 1 are connected in parallel.

The trigger works as follows.

In the initial state, when the control signal of unlimited duration is applied to the input 14, the trigger is in the zero state. In this case, the contacts of the remote switch 1.1 and 1.2 are closed, and its contacts 1.3 and 1.4 are open. The anti-drop relay 11, the winding of which is shunted by contact 1.2, is de-energized. Therefore, the relay is de-energized and 3 delays. Relay 2 delays are also de-energized, since there is no input signal at input 13 of the trigger, which could be applied to the relay winding 2 delays through closed contacts 1.1 and 3.1. Contacts 2.2 and 3.2 relays 2 and 3 delays, respectively, are open. Relays 9 and 10 generators are not energized. Resistor 12 loads the trigger power supply.

When the signal is switched to input 13, a delay 2 relay power supply circuit is formed. The latter is triggered and by its contact 2.3 closes the power supply circuit of the relay 9 of the generator, closes its contact 9.1 in the power supply circuit of the single winding of the remote switch

Claims (2)

5 1. A switch 1 closes and opens contact 1.1 to break the power supply circuit of the relay 2 delay. The latter is de-energized, and the trigger is in a single state. At the same time, its contact 1.3 is closed, and thus the power supply circuit of the relay 3 delays is prepared. All the trigger relays are de-energized and the generators are not energized. In a single state, resistor 12 also loads the power supply. The assignment of pins 3.1 and 2.1 rel 3 i: 2 delays - blocking the simultaneous activation of relays 3 and 2, which can lead to excitation of the coil of remote switch 1, which is unacceptable. When the contacts of the remote switch I hang, for example, when the trigger goes from zero to one state, the trigger functions as follows. Due to the frozen state of the contacts 1.1, 1.2 1.3 and 1.4 of the switch, the counter-suspension relay II is energized, and its contact II.1 is closed. The power circuit of the relay 2 delay: input 13 - contact. 1.1 — pin 3.1 — winding of the relay 2, the first bus 8 of the power supply rvet, however, the excited state of the relay 2 is retained due to the RC-circuit of the release delay; during the time determined by the parameters of the RC circuit, the resistance of the resistor 4 and the capacitance of the capacitor 6, as well as the magnitude of the release current of the relay 2. At the same time, closure of the contact 11.1 of the relay 11 of the anti-oscillation leads to the formation of a new power supply circuit of the relay 2: power supply bus 15 - contact 11.1 - contact 3.1 relay 2 winding - power bus 8. The last power circuit of relay 2 is maintained until the hang of the switch contacts is resolved and the trigger has gone to one state. In this case, the generator relay 9 periodically closes the contact 9.1 in the power supply circuit of the single winding of the remote switch 1, ensuring the passage of current pulses of the required amplitude and duration through the single winding. In practice, no more than two pulses are required to eliminate freezes. Thus, the disadvantage of known triggers is eliminated. This significantly increases the reliability of the trigger. In addition, hardware costs are reduced when building relay pei-sources. This is due to the fact that when building a relay register on the basis of this trigger, a delay relay, a relay and an overspeed relay. theoretically, they form a common part of the register with any number of bits, while the use of a known device for this purpose requires the use of a delay relay for each bit. Practically, the use of one common part for a large number of bits is limited by the intensity of voltage on the long circuits of series-connected contact pairs of the remote switch 1. In FIG. 2 shows a register diagram for 16 bits, performed using relay triggers shown in FIG. 1. The numbers 1 16, 17 ... 30 indicate the remote switches of the sixteen bits of the register. The input buses are respectively designated: 13.1, 14.1, 13.16, 14,16 ... 13.30, 14.30, as well as contacts 1.1, 1.2, 1.3, 1.4, 16.1, 16.2, 16.3, 16.4 ... 30.1, 30.2, 30.3, 30.4 and etc. The rest of the circuit is common to all bits of the register, and the elements are denoted by the same numbers as in FIG. 1. Claims of the invention A relay trigger comprising a remote switch and a first and second delay relay with RC release delay circuits that are connected in parallel to their windings, the first terminals of which are connected to the first power bus, characterized in that, in order to increase the reliability of the trigger and reduce hardware costs when building registers based on it; two generators are introduced into it on a relay, an anti-drop relay and a resistor, with the first output of the first winding of a remote switch through a serial the circuit from the disconnecting contact of the remote switch and the expanding contact of the first delay relay is connected to the second terminal of the winding of the second delay relay, the first output of the second winding of the remote switch is connected via a series circuit from the closing contact of the second switch to the second terminal of the winding of the first relay , the connection points of the co-tacts forming the series circuits are connected to the counter contact the second power bus, the second terminals of the remote switch windings are connected via the closing contacts of the generator relays to the first power supply, the first windings of the first and second generator relays are connected to the second power supply busbars via a short circuit, the second windings of the generator relays are connected to the first power bus, the first one, the output winding of the anti-sticking relay connected to the first power bus. Fig.198 The second terminal is connected via a resistor to the second power bus, parallel to the winding of the anti-hung relay, the opening and closing contacts of the remote switch are connected in parallel. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 388367, cl. H 03 K 23/03, 09.02.72, 2. USSR Copyright Certificate No. 454700, cl. H 03 K 23/03, 21.03.72,