CN203911895U - Input output circuit for interface of public address (PA) system and fire alarm system (FAS) - Google Patents
Input output circuit for interface of public address (PA) system and fire alarm system (FAS) Download PDFInfo
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- CN203911895U CN203911895U CN201420291279.9U CN201420291279U CN203911895U CN 203911895 U CN203911895 U CN 203911895U CN 201420291279 U CN201420291279 U CN 201420291279U CN 203911895 U CN203911895 U CN 203911895U
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- 238000010276 construction Methods 0.000 abstract description 4
- 230000003287 optical effect Effects 0.000 abstract 3
- 239000000853 adhesive Substances 0.000 description 2
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- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 230000005622 photoelectricity Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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Abstract
The utility model provides an input output circuit for an interface of a public address (PA) system and a fire alarm system (FAS). An input output circuit includes a rectifier bridge, an optical coupler and jumper wires. The input end of the rectifier bridge is connected with a third pin of jumper wire J3 and a third pin of jumper wire J4 respectively. A second pin of jumper wire J3 is connected with a third pin of jumper wire J1. A second pin of jumper wire J1 is connected with an IO+ input contact of the FAS. A second pin of jumper wire J4 is connected with a third pin of jumper wire J2. A second pin of jumper wire J2 is connected with an IO- output interface contact of the FAS. An output end of the rectifier bridge is connected with an input negative end of optical coupler while the other input end of the rectifier bridge is connected with an output positive end of the optical coupler U1 through a resistor R1. The input output circuit is one that covers various modes and requirements in the FAS; when the FAS is in a humid node mode, bridge type processing on the circuit is carried out, so that active input having a strict polarity requirement is simplified, and a construction unit can perform wiring freely without discriminating the positive and negative ends.
Description
Technical field
The utility model belongs to circuit design field, especially relates to a kind of imput output circuit for Public Address system and fire-fighting system interface.
Background technology
The form that FAS (fire-fighting system) inputs to PA (Public Address system) has two kinds: dry contact (passive) and wet node (active), if but while adopting wet node after reverse polarity connection, can burn out equipment.In addition, consider and disturb large site environment, and along with the growth of engineering experience, some FAS systems be not only input dry contact or wet node to PA system, also require PA system feedback to dry contact of FAS system.Based on above different requirement, PA system can be by different modules, and for example, FAS system is dry contact pattern, and PA system is selected dry contact module; FAS system is wet contact pattern, and PA system is selected wet contact module etc., has so just increased the quantity of unit in PA system, exists and is difficult to accomplish standardized problem.
Summary of the invention
Problem to be solved in the utility model is to provide a kind of by different mode in above FAS system and require the imput output circuit for Public Address system and fire-fighting system interface all contained.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of imput output circuit for Public Address system and fire-fighting system interface, comprise rectifier bridge, optocoupler U1 and wire jumper, the input of described rectifier bridge is connected with the three-prong of wire jumper J4 with the three-prong of wire jumper J3 respectively, the second pin of described wire jumper J3 is connected with the three-prong of wire jumper J1, the second pin of described wire jumper J1 connects the IO+ input contact of FAS system, the second pin of described wire jumper J4 is connected with the three-prong of wire jumper J2, the second pin of described wire jumper J2 connects the IO-input contact of FAS system, an output of described rectifier bridge is connected with the input negative terminal of optocoupler U1, another output of described rectifier bridge is connected with the input anode of optocoupler U1 by resistance R 1, the input anode of described optocoupler U1 is also connected with resistance R 2 by wire jumper J5, described resistance R 2 is connected with 24V power supply, the output access CPU of described optocoupler U1.
Further, the first pin of described wire jumper J1 and J2 is connected with the collector electrode of triode Q2 by relay, the grounded emitter of described triode Q2, the base stage of described triode Q2 is divided two-way, lead up to resistance R 6 ground connection, another road is connected with the base stage of triode Q1 with resistance R 4 by resistance R 5 successively, the collector electrode of described triode Q1 is connected with the negative electrode of light-emitting diode D1, the anode of described light-emitting diode D1 is connected with 3.3V power supply by resistance R 3, between described resistance R 4 and resistance R 5, access IO2OUT signal, meet the demand of FAS system output mode.
Advantage and the good effect that the utlity model has are: this circuit is by different mode in FAS system and requires the circuit of all containing, and in the time that FAS is wet node mode, circuit has done bridge-type processing, the simplification that the active input of strict polar requirement is become, unit in charge of construction can be regardless of positive and negative careless wiring, by IO2OUT control relay, according to actual requirement, can adhesive or disconnect relay, meet the demand of FAS system output mode; Have cost of manufacture, energy loss and reduce, stability strengthens, operation, control, the advantage such as easy to use.
Brief description of the drawings
Fig. 1 is circuit diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, specific embodiment of the utility model is elaborated.
As shown in Figure 1, a kind of imput output circuit for Public Address system and fire-fighting system interface, comprise rectifier bridge, optocoupler U1 and wire jumper, the input of described rectifier bridge is connected with the three-prong of wire jumper J4 with the three-prong of wire jumper J3 respectively, the second pin of described wire jumper J3 is connected with the three-prong of wire jumper J1, the second pin of described wire jumper J1 connects the IO+ input contact of FAS system, the second pin of described wire jumper J4 is connected with the three-prong of wire jumper J2, the second pin of described wire jumper J2 connects the IO-input contact of FAS system, an output of described rectifier bridge is connected with the input negative terminal of optocoupler U1, another output of described rectifier bridge is connected with the input anode of optocoupler U1 by resistance R 1, the input anode of described optocoupler U1 is also connected with resistance R 2 by wire jumper J5, described resistance R 2 is connected with 24V power supply, the output access CPU of described optocoupler U1, the first pin of described wire jumper J1 and J2 is connected with the collector electrode of triode Q2 by relay, the grounded emitter of described triode Q2, the base stage of described triode Q2 is divided two-way, lead up to resistance R 6 ground connection, another road is connected with the base stage of triode Q1 with resistance R 4 by resistance R 5 successively, the collector electrode of described triode Q1 is connected with the negative electrode of light-emitting diode D1, the anode of described light-emitting diode D1 is connected with 3.3V power supply by resistance R 3, between described resistance R 4 and resistance R 5, access IO2OUT signal, meet the demand of FAS system output mode.
The course of work of this example is as follows:
1) in the time that FAS system is dry contact pattern, by J1,2, the 3 pin short circuits of J2, by J3,1, the 2 pin short circuits of J4, by J5 short circuit, the current circuit of formation is as follows:
The 1. 2. 2. 3. 2. 3. 1. 2. pin (24V_GND) of pin → J4 of pin → FAS system dry contact → J2 of pin → J1 of 24V → R2 → J5 (short circuit) → U1 → J3
Electric current finally passes through a series of elements to 24V_GND by 24V, and optocoupler U1 conducting is processed to CPU after photoelectricity isolation.
2) in the time that FAS system is wet contact pattern, by J1,2, the 3 pin short circuits of J2, by J3,2, the 3 pin short circuits of J4, the current circuit of formation is as follows:
2. 3. 2. 3. 2. 3. 2. 3. pin → IO1-of pin → J2 of pin → rectifier bridge → R1 → U1 → rectifier bridge → J4 of pin → J3 of IO1+ → J1
Electric current finally passes through a series of elements to IO1-by IO1+, and optocoupler U1 conducting is processed to CPU after photoelectricity isolation.
Wet node, has the active input of polarity, and reverse polarity connection can cause seriously burning out of equipment, adopts rectifying bridge type processing when this circuit design, and arbitrarily wiring while construction like this, for construction has brought convenience.
3) in order to meet the demand of FAS system, in this circuit, increased output mode.By J1,1, the 2 pin short circuits of J2, are implemented as follows: the main control part of this circuit, and by IO2OUT control relay, according to actual requirement, can adhesive or disconnect relay, meet the demand of FAS system.
Current this circuit can be realized all requirements with FAS system, comprises dry contact, wet node, dry contact feedback.For whole PA system, reduce the quantity of equipment, reduce cost, improve greatly the standardization of product.And when circuit design, considered on-the-spot environment and wiring, also reduce the complexity of field connection.
Above an embodiment of the present utility model is had been described in detail, but described content is only preferred embodiment of the present utility model, can not be considered to for limiting practical range of the present utility model.All equalization variation and improvement etc. of doing according to the utility model application range, within all should still belonging to patent covering scope of the present utility model.
Claims (2)
1. the imput output circuit for Public Address system and fire-fighting system interface, it is characterized in that: comprise rectifier bridge, optocoupler U1 and wire jumper, the input of described rectifier bridge is connected with the three-prong of wire jumper J4 with the three-prong of wire jumper J3 respectively, the second pin of described wire jumper J3 is connected with the three-prong of wire jumper J1, the second pin of described wire jumper J1 connects the IO+ input contact of FAS system, the second pin of described wire jumper J4 is connected with the three-prong of wire jumper J2, the second pin of described wire jumper J2 connects the IO-input contact of FAS system, an output of described rectifier bridge is connected with the input negative terminal of optocoupler U1, another output of described rectifier bridge is connected with the input anode of optocoupler U1 by resistance R 1, the input anode of described optocoupler U1 is also connected with resistance R 2 by wire jumper J5, described resistance R 2 is connected with 24V power supply, the output access CPU of described optocoupler U1.
2. a kind of imput output circuit for Public Address system and fire-fighting system interface according to claim 1, it is characterized in that: the first pin of described wire jumper J1 and J2 is connected with the collector electrode of triode Q2 by relay, the grounded emitter of described triode Q2, the base stage of described triode Q2 is divided two-way, lead up to resistance R 6 ground connection, another road is connected with the base stage of triode Q1 with resistance R 4 by resistance R 5 successively, the collector electrode of described triode Q1 is connected with the negative electrode of light-emitting diode D1, the anode of described light-emitting diode D1 is connected with 3.3V power supply by resistance R 3, between described resistance R 4 and resistance R 5, access IO2OUT signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420291279.9U CN203911895U (en) | 2014-05-30 | 2014-05-30 | Input output circuit for interface of public address (PA) system and fire alarm system (FAS) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420291279.9U CN203911895U (en) | 2014-05-30 | 2014-05-30 | Input output circuit for interface of public address (PA) system and fire alarm system (FAS) |
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| Publication Number | Publication Date |
|---|---|
| CN203911895U true CN203911895U (en) | 2014-10-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420291279.9U Expired - Lifetime CN203911895U (en) | 2014-05-30 | 2014-05-30 | Input output circuit for interface of public address (PA) system and fire alarm system (FAS) |
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| CN (1) | CN203911895U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106924925A (en) * | 2017-03-23 | 2017-07-07 | 四川赛科安全技术有限公司 | The active output driving circuit and its implementation of a kind of input/output module |
-
2014
- 2014-05-30 CN CN201420291279.9U patent/CN203911895U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106924925A (en) * | 2017-03-23 | 2017-07-07 | 四川赛科安全技术有限公司 | The active output driving circuit and its implementation of a kind of input/output module |
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| GR01 | Patent grant |