SU692069A1 - Count trigger - Google Patents

Description

The invention relates to discrete automation devices, in particular, to counting triggers, and can be used for building automation devices, telemechanical devices, as well as in communication equipment for building control and counting circuits, frequency dividers, and others. a romagia relay, two power supplies, two resistors, a capacitor, and a rectifier 1. The disadvantage of this device is the presence of limitations on the duration of the input pulse. It is also known a device containing two single-winding electromagnetic relays, in whose circuits of windings ballast resistors are connected in series, and in the control circuits they open and close the same relay and two make contacts of the control device (control contacts) 2. The disadvantage of this device is circuit complexity. The purpose of the invention is to simplify the design of the device. To achieve this goal, in the counting trigger containing two relays and a control contact, the winding of the first relay is connected by one output to the first pole of the power supply, the other output with its own closing contact and the opening contact of the first switching group of the second relay connected to the closing contact of the first switching circuit of the second relay and one terminal of the winding of the second relay, with a shunt which output is connected to the second pole of the power source, switching the contact of the first switching group spikes of the second relay is connected via a control contact and the opening contact of the second switching group of the second relay to the second pole of the power source, and the closing contact of the second switching group of the second relay is connected to the first pole of the power source; The drawing shows a schematic diagram of the counting trigger, the winding of the first relay 1 of which is connected by one output to the first pole of the power source, and another output to its own closing contact 2 and the opening contact of the first switching group 3 of the second relay 4, another output of the closing contact 2 of the first relay. connected to the closing contact of the first switching group 3 of the second relay 4 and one output of the winding of the second relay 4, the other output of which is connected to the second pole of the power source, the switching contact of the first switch group 3 of the second relay via the control contact 5 and normally closed contact of the second switch group 6 of the second switch 4 is connected to the second pole of the power source, and a make contact of the second switch group 6 of the second switch 4 is connected to a first pole of the power source.

The device works as follows.

When the control contact 5 (for example, a button) is first closed along the circuit: the second pole of the source, opening contact 6, contact 5, opening contact 3, relay 1 winding - the first pole of the power supply turns on relay 1, short circuit 2 of relay 4. An unlocked relay contact 1 can be used for output

signal. When the control contact 5 is opened along the circuit; the first pole of the power source, the winding of the relay 1, the closed contact 2, the winding of the relay 4, the second pole of the power source - turns on the relay 4 and the relay 1 remains on. When turned on, the relay 4 switches the switching contact of group 3, preparing the circuit for disconnecting the device. An unused switching group of contacts of the relay 4 can be used to output a delayed output signal of the device. In this state, the device may be how long.

The re-closing of the control contact 5 along the circuit: the first pole of the power source, the closing contact 6, the contact 5, the closing KOHTai T of group 3, the winding of the relay 4 - confirms that the relay 4 is on, but the same circuit shunts the relay 1 and the latter disappears , open contact 2 in the circuit of the relay coil 4 and contact the output signal.

Re-opening the control contact 5 reset the device and the output signal is taken. (See the element state table).

Original

The first closing of the control contact 5

The first opening of the control contact 5 o

The second circuit of control contact 5

The second interruption of the digging contact 5

Note: The states of the elements are indicated:

Thus, the device is a counting trigger performed on the relay, dividing by 2 the number of input

Long

OK short time

1Long

, 1 Short

Long

1 - on (closed); О - disabled (open).

signals. With the cascade construction of a scheme of n such devices can be carried out "

but dividing the number of input signals in

time.

Relays 1 and 4 can be chosen to supply voltage twice as low as the supply voltage of the circuit. In this case, for the time of contact closing of button 5, one of the relays is supplied with voltage twice as much as the passport, which does not lead to short pressures of the button. output relay out of build Relays 1 and 4 can be connected to the full voltage of the circuit. In this case, it is necessary that the relay operating current is at least twice i less than the rated current, which is satisfied; For example, such common types of relays as RKN, RPN. Such a solution is necessary in case of using as contact 5, for example, the contact of an automation circuit with a long closing time. Ispani showed high reliability of the device. The device, when using the corresponding relays, can be performed both on alternating and direct current.

Claims (2)

1. The patent of Great Britain, No. 1100926, cl. H 3 P from 1968. 2. Caldwell S. Logical synthesis of relay devices. Translated from English, ed. G. K. Maksatova, 1962, p. 499, fig. 12.1. () g