CN2400845Y - Self-checking display device for use in single-point flashing signal alarm - Google Patents

Abstract

The utility model relates to a self-checking display device for using in a single-point flashing signal alarm. The utility model is composed of a light emitting diode and a resistor. The utility model is characterized in that the light emitting diode and the resistor are connected in series with an output end of a control circuit of an alarm, and are connected in parallel with a relay of an audible alarm part; the audible alarm and the self-checking device can synchronously work; an alarm is given in a sound mode, simultaneously, a lamp of the self-checking display light emitting diode is turned on, a user can judge whether a lamplight alarm part in the alarm has a fault, and a self-checking efficiency can be obtained.

Description

Self check display device in the single-point flashing signal alarm

The utility model relates to the self-checking unit in a kind of single-point flashing signal alarm, belongs to the big class of telltale.

Single-point flashing signal alarm is a kind of robotization warning device that industrial automation control appliances such as electric power, chemical industry, metallurgy, power transformation, oil monitor various parameter situations of change in the production run that is used for, and it sends by primary instrument, and contact point signal is carried out flash of light and production run safety is guaranteed in audible alarm.The structure of this signal alarm is small and exquisite, assembly unit is flexible, because control partly is to be installed on respectively in each alarm, each alarm set point is installed concentratedly on the warning dish again then, so do not exist because of some alarm set points itself break down and influence the phenomenon of whole warning system cisco unity malfunction, but there is a problem in similar for a long time this alarm, because when each alarm set point is reported to the police, can send a flashing signal and an acoustic signal, weak point is exactly when some alarm set points are reported to the police, and sound equipment only occurs, and the flashing signal that should occur simultaneously occurs not, at this moment, the site operation personnel only hears sound equipment and does not see alarm window flash of light, does not just know that the content of which correspondence is being reported to the police, the appearance of this situation, illustrate that certain alarm set point itself has fault on the warning dish, the maintainer will check it, but the maintainer can not to distinguish out be which alarm set point has fault at once, therefore to go successively one by one to check, bring great inconvenience for the field maintemance personnel.Because alarm is an important composition part in the automation equipment control, the scene does not allow again with going for a long time maintenance.

The purpose of this utility model is to disclose a kind ofly can detect demonstration to alarm itself, whether has fault by detecting diagnostic alarms device itself.Deficiency and defective in the traditional alert device have been solved.

The utility model is to realize like this.Resistance (1) and light emitting diode (2) series connection are connected on alarm control circuit output terminal later, and are in parallel with audible alarm relay (3) partly, add at light emitting diode+24V voltage that light emitting diode is arranged on the alarm flashing light alarm panel simultaneously.Further specify with accompanying drawing below.

Accompanying drawing 1, the utility model electrical schematic diagram.

Accompanying drawing 2, outside drawing of the present utility model.

Embodiment: with reference to the accompanying drawings 1, A1, A2, A3 are respectively test, confirmation signal and signal port.B1, B2, B3 are respectively three photoelectric isolating circuits.C is a control circuit.U1A, U2A, U3A, U4A are AND circuit, U5A, U6A, U7A, U8A are reverser, when port A1 has test signal, behind photoelectricity isolation B1 and control circuit C, input U3A-1, the U4A-1 of U3A and U4A, U4A-2 are high level, output U4A-3, U3A-3 is a high level, behind reverser U6A, U7A, be low level, this moment, light S was luminous, relay Z1 work, and light emitting diode D is luminous, if light warning this moment fault partly, light emitting diode D is luminous, and audible alarm can be determined partly fault of light this moment.During operate as normal, when port A3 has signal, by being output as high level behind photoelectricity isolation B3 and the control circuit C, input end U1A-1, the U1A-2 of U1A is high level, and output terminal U1A-3 also is a high level, input end U3A-1, the U3A-2 of U3A is high level, output U3A-3 also is a high level, by just becoming low level behind the reverser U7A, at this moment forms electric loop with light warning one end+24V partly, send light warning, promptly alarm lamp S is luminous.Simultaneously, U1A-3 is a high level, and by being output as low level behind the reverser U5A, the end of relay Z1 is+24V voltage, at this moment forms voltage difference, relay Z1 adhesive, and audible alarm is sent in audible alarm DL work.At this moment, the self-checking unit circuit is connected, and light emitting diode D is luminous.In sum, when port had detected signal, light sudden strain of a muscle, sound equipment and self check lamp were warned simultaneously.Be normal operating conditions this moment.If audible alarm DL does not report to the police, though possible Z1 is bad, light emitting diode is still luminous, at this moment shows the sound equipment fault.If light exports the part fault but audible alarm self check pilot lamp D is luminous, can determine that light partly breaks down this moment.Make the field maintemance personnel judge the trouble spot of alarm itself apace like this.

The utility model can detect the fault that shows single-point flash alarm itself automatically, remind the very fast identification alarm set point of maintainer abort situation, gain time to plant maintenance, having and show correct, clear, characteristics intuitively, is the new single site flash alarm of industrial automation control appliance monitor alarms such as electric power, chemical industry, metallurgy, oil.

Claims (3)

1. the self check display device in the single-point flashing signal alarm of being made up of resistance (1) and light emitting diode (2) is characterized in that resistance (1) and light emitting diode (2) series connection are in parallel at alarm control circuit output terminal and with audible alarm relay (3) partly.

2. the self check display device in the single-point flashing signal alarm according to claim 1 is characterized in that described light emitting diode adds 24V voltage.

3. the self check display device in the single-point flashing signal alarm according to claim 1 is characterized in that described light emitting diode (2) is arranged on the flashing light alarm panel of signal alarm.

Images