[utility model content]
The utility model has overcome the deficiency of above-mentioned technology, provide a kind of coupling to isolate alarm, alarm is isolated in this coupling can cut off the timely related personnel of notifying bank of triggering 110 warnings under the situations such as outage, idler illegally enter in finance, has also guaranteed that monitoring host computer is not subjected to the interference of civil power surge simultaneously.
For achieving the above object, the utility model has adopted following technical proposal:
Alarm is isolated in a kind of coupling, comprise that branch road is isolated in first coupling and branch road is isolated in second coupling, first coupling is isolated branch road and is included a RC bleeder circuit 1 that connects in turn, first current rectifying and wave filtering circuit 2, the first resistance current-limiting circuit 3, the first coupling output circuit 4, a described RC bleeder circuit 1 input end is connected with the 220V electric main, and the first coupling output circuit, 4 output terminals are connected with monitoring host computer; Second coupling is isolated branch road and is included second current rectifying and wave filtering circuit 5 that connects in turn, the second resistance current-limiting circuit 6, the second coupling output circuit 7, described second current rectifying and wave filtering circuit, 5 input ends are connected with the 12V direct current, and the second coupling output circuit, 7 output terminals are connected with monitoring host computer.
Compared with prior art, the beneficial effects of the utility model are:
1, equipment is in time reported to the police to the equipment owner under experience power failure, powering-off state.
2, financial terminal situation such as illegally enters and the 110 timely related personnel of notifying bank that report to the police that trigger outage, idler, in time handles various abnormal conditions.Simultaneously also guaranteed that monitoring host computer is not subjected to the interference of civil power surge.
[embodiment]
Referring to Fig. 1, alarm is isolated in a kind of coupling, comprise that branch road is isolated in first coupling and branch road is isolated in second coupling, first coupling is isolated branch road and is included a RC bleeder circuit 1 that connects in turn, first current rectifying and wave filtering circuit, 2, the first resistance current-limiting circuits, 3, the first coupling output circuits 4, a described RC bleeder circuit 1 input end is connected with the 220V electric main, and the first coupling output circuit, 4 output terminals are connected with monitoring host computer; Second coupling is isolated branch road and is included second current rectifying and wave filtering circuit 5 that connects in turn, the second resistance current-limiting circuit 6, the second coupling output circuit 7, described second current rectifying and wave filtering circuit, 5 input ends are connected with the 12V direct current, and the second coupling output circuit, 7 output terminals are connected with monitoring host computer.
Referring to Fig. 2, a described RC bleeder circuit 1 comprises first resistance R 1 and first capacitor C 1 together in parallel, and their end is connected with the positive pole of 220V electric main.
Described first current rectifying and wave filtering circuit 2 comprises series connection first, second diode D1, D2, second capacitor C 2 together; Node between the positive pole of the negative pole of the first diode D1 and the second diode D2 and first resistance R 1 are connected with the other end after 1 parallel connection of first capacitor C, node between one end of anodal and second capacitor C 2 of the first diode D1 is connected with the negative pole of 220V electric main, and the negative pole of the second diode D2 is connected with the other end of second capacitor C 2.
The described first resistance current-limiting circuit 3 is one second resistance R 2, and the one end is connected with the negative pole of the second diode D2.
The described first coupling output circuit 4 is the first photoelectrical coupler U1, input end of the first photoelectrical coupler U1 is connected with second resistance R, 2 other ends, first another input end of photoelectrical coupler U1 is connected with the positive pole of the first diode D2, and two output terminals of the described first photoelectrical coupler U1 are connected with monitoring host computer.
Described second current rectifying and wave filtering circuit 5 comprises that the 3rd diode D3 and the 3rd capacitor C 3, the three diode D3 positive pole that connect are connected with the 12V direct current, and the 3rd diode D3 negative pole is connected with an end of the 3rd capacitor C 3.
The described first resistance current-limiting circuit 3 is one the 3rd resistance R 3, and it is connected with the 3rd diode D3 negative pole.
The described second coupling output circuit 7 is the second photoelectrical coupler U2, input end of the second photoelectrical coupler U2 is connected with second resistance R, 2 other ends, second another input end of photoelectrical coupler U2 is connected with an end of the 3rd capacitor C 3, and two output terminals of the described second photoelectrical coupler U2 are connected with monitoring host computer.
This circuit is the output of two-way input two-way, one the tunnel is the input of 220V electric main, RC dividing potential drop through first capacitor C 1, first resistance R 1, the rectifying and wave-filtering of the first diode D1, the second diode D2, second capacitor C 2, after second resistance R, 2 current limlitings, be delivered to monitoring host computer by the first photoelectrical coupler U1; Another road is a 12V warning triggering level signal, through the rectifying and wave-filtering of the 3rd diode D3, the 3rd capacitor C 3, after the 3rd resistance R 3 current limlitings, is delivered to monitoring host computer by the second photoelectrical coupler U1.