RU1837340C - Device for control of address stub of fire-alarm system - Google Patents

Abstract

VcTpov iCTBO belongs to the field of automotive and telemechanics and can be used in 1-3 ct 1 vano in addressable fire alarm systems. The aim of the invention is to increase the speed and functional reliability of the device. The goal is achieved by the fact that the fire alarm address loop control device comprising a current meter, the output of which is connected to the first output terminal of the device, a power switch, the control input of which is the first control input of the device, the output of the current meter is the information output of the device, isolation diodes and two keys, the output of the power switch is connected to one terminal of the separation diodes, the other terminals of which are connected via keys to the device’s common power bus and va are respectively second and third output terminals of the device for controlling the key inputs are respectively second and third inputs of the gate device. 1 ill. With s

Description

The proposed device belongs to the field of automation and telemechanics and can be used in addressable fire alarm systems.

The aim of the invention is to increase the speed and functional reliability of the device.

This goal is achieved by the fact that in the known device for controlling the addressable loop of the fire alarm,

neighing current meter to the output

which is connected to the first output terminal of the device, the power switch, the control input of which is the left | m control input of the device, the output of the current meter is

the information output of the device, isolation diodes and two keys are additionally introduced, the output of the power switch is connected to one output of the separation diodes, the other conclusions of which are connected through the keys to the device’s common power bus and are respectively the second and third output terminals of the device, the key control outputs are respectively second and third control inputs of the device.

The drawing shows a functional diagram of a device for controlling the addressable loop of a fire alarm, where 1 is a power switch, 2 is a separation

00

co-h

C Oh

diodes, 3 - current meter, A - keys, 5 - address loop, b - mzveschestva.

The device comprises those indicated in FIG. 1 power switch, isolation diodes, current meter, keys made from commercially available parts.

The address loop control device operates as follows. The loop control pulses are generated by the power switch 1 and one of the keys 4 by the supply of control signals. As a specific example of the use of an addressable detector, a known detector can be taken.

In this case, the control signals must correspond to the signals. The signal from the addressable transmitters (current transmission) is taken from the current meter 3. In the event of a break, the interrogation is carried out alternately from different ends of the loop. Controlled by the upper or lower key 4, through dividing diodes 2, the supply voltage is applied to both ends of the loop 5, which ensures continuous powering of the address detectors 6 when the loop 5 is broken, regardless of the direction of the interrogation, but a control pulse is generated only on one side of the loop and does not occur on the other hand, since the separation diode 2 forms an integrator with the loop capacitance, which does not allow the formation of control pulses in it, because there is no discharge of the tank through the key 4.

Thus, the technical advantage of the proposed device compared with the prototype is the improvement of operational characteristics, as it eliminates the loss of time during the interrogation of the loop caused by voltage

power supply from a portion of the addressable detectors and the need for exposure after applying the supply voltage, while maintaining the ability to determine where the loop breaks. Using the proposed device in a fire alarm system will ultimately reduce the damage from a fire.

Claims (1)

The claims A fire alarm address loop control device comprising a current meter, the output of which is connected to the first output terminal of the device, a power switch, the control input of which is the first control input of the device, the output of the current meter is the information output of the device, characterized in that. in order to increase the speed and functional reliability of the device, isolation diodes and two keys are inserted into it, the output of the power switch is connected to one output of the isolation diodes, the other outputs of which are through the keys are connected to the device’s common power bus and are respectively the second and third input terminals of the device, the key control inputs are the second and third control inputs of the device, respectively.