RU2251208C1 - Double-input relay flip-flop alternatives) - Google Patents

Abstract

FIELD: automatic control.

SUBSTANCE: relay that has coil 5 and contact 6 is controlled from two control stations incorporating START and STOP buttons 1, 4 and 2, 3, respectively. STOP buttons are spaced apart so that they have no common point. That is why each push-button station needs three-conductor cable for connection instead of usually employed four-conductor cable.

EFFECT: simplified design.

2 cl, 2 dwg

Description

The invention relates to the field of electroautomatics.

Closest to the first embodiment of the invention is a well-known two-input relay trigger / 1 /, controlled from two places, which contains a relay coil and serially connected the opening contact of the button “Stop-1” and the closing contact of the button “Start-1”, in parallel with which the closing the contact of the “Start-2” button and the make contact of the relay, and also has the make contact of the “Stop-2” button. The disadvantage of the device is complexity, since a four-core cable is required to connect push-button stations.

Closest to the second embodiment of the invention is a well-known two-input relay trigger / 1 /, controlled from two places, which contains parallel connected closing contacts of the buttons “Start-1” and “Start-2”, one output connected to the relay coil, two buttons “ Stop-1 ”and“ Stop-2 ”with make contacts, the first output of the first“ Stop-1 ”button is connected to the second output of the“ Start ”buttons. This device has a similar disadvantage.

The aim of the invention is to increase reliability.

The goal is achieved in the first embodiment of the invention due to the fact that the first pin output of the “Stop-2” button is connected to the second output of the “Start-1” and “Start-2” buttons, and the second output is connected to the output of the relay coil.

The goal is achieved in the second embodiment of the invention due to the fact that the relay contact is connected by the first output to the second output of the “Stop-1” button, and the second output through the “Stop-2” button is connected to the second output of the “Start” buttons.

Figure 1 and 2 shows a diagram of devices, respectively, for the first and second claims. It is indicated here: 1 - “Stop-1” button; 2 - “Start-1” button; 3 - “Stop-2” button; 4 - button “Start-2”; 5 - relay coil; 6 - contact of the same relay. Buttons 2 and 4 are connected in parallel. Buttons belonging to the same control location (one button station) are circled by a dotted line. The terminals of the device are supplied with voltage from the power source.

In figure 1, the buttons 1, 2, 3 and the coil 5 are connected in series. Pin 6 of the relay is connected in parallel with the circuit of buttons 2 and 4 connected in parallel.

In figure 2, button 1, pin 6, button 3, coil 5 are connected in series. Parallel connected between the buttons 2 and 4 are connected in parallel with a circuit composed of sequentially connected buttons 1, pin 6, buttons 3. The devices operate as follows.

When you press any “Start” button (2 or 4), current flows through coil 5, the relay is activated, and pin 6 becomes self-holding. So the starting impulse is remembered. When you click on any “Stop” button (1 or 2), the power circuit of coil 5 is interrupted and the memory is reset.

To implement the scheme, three-core cables from each control point are required. This simplifies the device.

Sourse of information

1. Menshov B.G. and other electrical equipment of the oil industry. M .: Nedra, 1990, p. 318, Fig. 9.6.

Claims (2)

1. A two-input relay trigger containing a relay coil and a series-connected opening contact of the “Stop-1” button and a closing contact of the “Start-1” button, in parallel with which a closing contact of the “Start-2” button and a closing contact of the relay are connected, also has a closing contact “Stop-2” button, characterized in that the first terminal output of the “Stop-2” button is connected to the second terminal of the “Start-1” and “Start-2” buttons, and the second terminal is connected to the output of the relay coil. 2. Two-input relay trigger containing parallel connected closing contacts of the “Start-1” and “Start-2” buttons, connected to the relay coil with one terminal, two “Stop-1” and “Stop-2 buttons with closing contacts, the first output of the first the “Stop-1” button is connected to the second output of the “Start” buttons, characterized in that the make contact of the relay is connected by the first output to the second output of the “Stop-1” button, and the second output through the “Stop-2” button is connected to the second output of the buttons "Start".

Images