SU401983A1 - DEVICE FOR ALARM SIGNALING - Google Patents

Description

The proposed device relates to the field of remote control mechanisms.

Devices for signaling the state of the control object are known, comprising a transformer, pulse pairs from intermediate relays and a time relay, diodes, an election key, through the first contacts of which an electoral relay is connected to the secondary winding of the transformer, and a signal lamp parallel to which a resistor is connected.

However, in known devices, to provide all necessary signaling modes, communication is required with at least two control contacts of the control object or a special relay.

The proposed device is characterized in that in it a signal lamp is connected to the secondary winding of the transformer through the second and third contacts of the switch key in series with the diodes and windings of the intermediate relays, and through the fourth switch contacts select the switch in series with the block contacts of the control object.

This makes it possible to use for the provision of all necessary signaling modes only one block-contact of the control object, i.e., reduce the number of wires connecting this object with the control panel.

The drawing shows a circuit diagram of the proposed device.

It contains a transformer 1, with the terminals of the secondary winding a and b, intermediate relays with windings 2, 3, time relays with closing contacts 4, 5, having a time delay for opening, diodes 6, 7, electoral key 8, electoral relay with winding 9 , a signal lamp 10 and a resistor 11. The diagram shows the block contacts 12 of the control object, the contacts of the intermediate and electoral relays, and the time relay windings for the sake of simplification are not shown. Elect key

8 has four pairs of contacts: I, II, III, IV, and contacts I, П and IV are closed in the position of the key “set, and contacts III are closed in the position of the key“ analysis.

In the initial position, when the control object is turned off, the signal lamp 10 is turned off, the key of the election 8 is in the "parse" position.

When dialing the mechanism for start-up, the key of election 8 is put in the "recruitment" position. With

In this case, an intermediate relay with a winding 3 is drawn in according to the target: phase in - winding 3 - diode 7 - contact II of the switch key 8 - signal lamp 10 - pin IV of the switch key 8 - phase a. This intermediate relay includes a time relay, which its contacts 5

bypasses the winding 3 of the intermediate relay and applies full voltage to the signal lamp 10, causing it to light up. When shunting the winding with 3 pins 5, the intermediate relay disappears and turns off the time relay. The time relay will de-wind the coil 3 of the intermediate relay, as a result of which a large resistance (coil resistance 3) is introduced into the indicated circuit of the signal lamp 10, and the signal lamp 10 goes out. Next, the intermediate relay is retracted, etc. So, a pulse-pair is formed and the signal lamp 10 flashes.

When the start button (not shown in the diagram) is pressed at the production site, a mechanism selected by the election relay with winding 9 is turned on, and its block contacts 12 are closed. When the block contacts 12 are closed, the signal lamp switches to an even light through the circuit: phase B - block contacts 12 signal lamp 10 - contacts IV key elect 8 - phase a. The transition of the signal lamp 10 to an even light is provided by connecting the phase to the control object through the contacts 12, as a result of which a blinking circuit, having greater resistance than the circuit through the contacts 12, is shunted.

In case of emergency shutdown of the mechanism, its block contacts 12 open and the signal lamp 10 switches to the flashing light in the same way as described when electing a control object.

To deactivate the mechanism, the electoral key 8 is placed in the "parse" position. In this case, the signal lamp 10 switches to the flashing light along the circuit: phase 8 —block contacts 12 — signal lamp 10 — contact P1 of the switch key 8 — diode 6 — winding 2 — phase a. The operation of the intermediate relay with winding 2 is similar to the operation of the intermediate relay with winding 3 in the “set.

When the stop button is pressed (not shown in the diagram), the control object is turned off, its block contacts 12 are opened, as a result of which the device returns to its original position. In this case, the intermediate relay with winding 2 is de-energized, and the signal lamp 10 goes out.

A resistor 11 that shunts the signal lamp 10 is designed to create a circuit in the event of a burnout.

When using polar separation of signals in the proposed device, one communication line is used both for controlling the mechanism and for signaling its state.

Subject invention

A device for signaling the state of the control object, containing a transformer, pulse pairs from intermediate relays and a time relay, diodes, an electoral key, through the first contacts of which an electoral relay is connected to the secondary winding of the transformer, in parallel with which a resistor is connected, that, in order to reduce the wires of communication with the control object, in it the signal lamp is connected to the secondary winding of the transformer via the second and third contacts of the switch key in series with the diodes and dipper intermediate relay, and by the fourth key contacts electing in series with a flow control object contacts.

U