CN109659916A - A kind of multifunctional safe circuit and its control method - Google Patents
A kind of multifunctional safe circuit and its control method Download PDFInfo
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- CN109659916A CN109659916A CN201811635053.5A CN201811635053A CN109659916A CN 109659916 A CN109659916 A CN 109659916A CN 201811635053 A CN201811635053 A CN 201811635053A CN 109659916 A CN109659916 A CN 109659916A
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- 238000000034 method Methods 0.000 title claims abstract description 9
- 230000003111 delayed effect Effects 0.000 claims description 15
- 239000003990 capacitor Substances 0.000 claims description 10
- 238000011084 recovery Methods 0.000 claims description 5
- 230000000630 rising effect Effects 0.000 description 3
- 230000001960 triggered effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000013024 troubleshooting Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
- H02H7/262—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of switching or blocking orders
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
- H02H7/263—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of measured values
Abstract
The invention discloses a kind of multifunctional safe circuit and its control methods, and wherein multifunctional safe circuit includes power supply, the safety circuit for being connected across both ends of power respectively and two-way redundant safety output circuit；Safety circuit is by including that the third relay branch of the second relay branch of the first relay branch of the first relay and the first power relay equipped with enabling signal, the second power relay and delay circuit including the second relay, equipped with input signal, the 4th power relay including third relay and equipped with input signal is constituted.Safety circuit specifically can be achieved delay cutoff and cut off two kinds of cutting modes immediately, can be not only used for the system for cutting off output at once, and the time delay module and output device that can be used for after power-off are still to the system to work on.The circuit function is realized by hardware logic completely, and without software intervention, the stability and reliability of its system can be greatly improved for the system that cutting timing has strict demand.
Description
Technical field
The invention belongs to safety circuit control fields, and in particular to a kind of multifunctional safe circuit and its control method.
Background technique
Relay circuit is widely used in electronic system, and the general relay circuit with delay function is often
Control delay function is gone by SCM system, waiting delay issues driving signal by SCM system later, to control relay
Device movement, but it is some require the higher situation of reliability under, monolithic processor controlled relay circuit is can not be by user
Received.Simultaneously in some electrical systems, time delay module and output device after power-off are still to work on, this requires
The output of safety circuit need to generate the module of great-jump-forward variation (or contact action), some systems by defined correct time
Then need to cut off main electricity after the failure occurred immediately, and existing safety circuit can not meet the requirement of this two o'clock simultaneously at present.
Summary of the invention
Goal of the invention: the present invention provides a kind of multifunctional safe circuit, which can meet cuts off immediately, and can
Meets the needs of delay cutoff.
Technical solution: a kind of multifunctional safe circuit including power supply, is connected across the safety circuit of both ends of power and double respectively
Road redundant safety output circuit；Safety circuit is by including the of the first relay and the first power relay equipped with enabling signal
Second relay of one relay branch, the second power relay and delay circuit including the second relay, equipped with input signal
Device branch, the 4th power relay including third relay and equipped with input signal third relay branch constitute；First
Relay is connected at least one normally-closed contacts of other branch relays, and is equipped with normally opened from connecting with each other relays
The normally opened contact of contact shunt, and to be series at least one in every circuit of the two-way redundant safety output circuit normally closed
Contact；Second relay is equipped with and the concatenated normally-closed contact of the first relay, the certainly string in parallel with the first relay normally open contact
Join normally opened contact, and is series at least one normally opened contact in every circuit of two-way redundant safety output circuit；Third after
Electric appliance is equipped with and the concatenated normally-closed contact of the first relay, certainly the connect normally opened touching in parallel with the normally opened contact of the first relay
Point, and it is series at least one normally opened contact in every circuit of the two-way redundant safety output circuit；The two-way is superfluous
Connect respectively on remaining Safety output circuit the first relay normally-closed contact, the second relay and third relay normally opened touching
Point.
A kind of control method based on above-mentioned multifunctional safe circuit, comprising the following steps:
A, when system jam, the safe input signal in the second relay branch is cut off, and time delayed signal keeps high
Level, the second relay can be delayed power loss, and normally opened contact of second relay in the Safety output first branch can delay recovery
It is kept closed；When the delay circuit in the second relay branch by the voltage at the second relay both ends be down to certain numerical value with
When lower, the second relay delay power loss, normally opened contact of second relay in Safety output restores normally opened, two-way redundant safety
The Safety output of output circuit is delayed by cutting；
B, the safe input signal cutting in third relay branch, power loss, third relay exist third relay immediately
Normally opened contact in Safety output restores normally opened, and the Safety output voltage of two-way redundant safety output circuit is to sever immediately upon impact by the firing pin；
C, after system failure recovery, if the enabling signal in the first safety circuit without giving upper pulse-triggered letter again
Number, the first relay, the second relay, the equal no power of third relay coil, safety relay circuit also can not work normally,
Two-way redundant safety output circuit keeps being cut off state.
The utility model has the advantages that (1) present invention has the output of control safety circuit and output voltage using a variety of relay assemblies
Two different cutting modes, safety circuit according to the difference of fault point, not only can cutting system immediately, but also can be with delay cutoff
System；After trouble shooting, safety circuit cannot restart suddenly, it is necessary to which given safety signal carries out failure reset could again
It obtains electric, it is ensured that system operates under adequate preparation；(2) safety circuit of the invention is realized by hardware logic completely, without software
Intervene, guarantees the reliability of its function, the different way of outputs is generated according to different fault points, have in certain pairs of cutting timing
The system of strict demand can greatly improve the stability and reliability of system.
Detailed description of the invention
Fig. 1 is the system framework figure of multifunctional safe circuit of the invention；
Fig. 2 is the circuit diagram of multifunctional safe circuit of the invention；
The position Fig. 3 multifunctional safe circuit logic timing diagram of the invention.
Specific embodiment
As shown in Figs. 1-2, a kind of multifunctional safe circuit including power supply, is connected across the safety circuit of both ends of power respectively
With two-way redundant safety output circuit；Safety circuit is by the first power relay including the first relay K1 and equipped with enabling signal
The first relay branch of device RL1, the second power relay RL2 including the second relay K2, equipped with input signal and delay
The third of second relay branch of circuit, the 4th power relay RL4 including third relay K3 and equipped with input signal
Relay branch is constituted；First relay K1 connects at least one normally-closed contacts of other branch relays, and be equipped with it is each
The normally opened contact from normally opened contact parallel connection of connecting of other relays, and it is series at the two-way redundant safety output circuit
At least one normally-closed contact in every circuit；Second relay K2 be equipped with the first concatenated normally-closed contact of relay K1, with the
One relay K1 normally opened contact it is in parallel from series connection normally opened contact, and be series at every of two-way redundant safety output circuit and return
At least one normally opened contact in road；Third relay K3 be equipped with the first concatenated normally-closed contact of relay K1, with the first relay
The normally opened contact of device K1 it is in parallel from series connection normally opened contact, and be series at every of the two-way redundant safety output circuit and return
At least one normally opened contact in road；Connect respectively on the two-way redundant safety output circuit the first relay normally-closed contact,
The normally opened contact of second relay and third relay.
The anode of one termination 24V power supply of the first power relay RL1 output normally opened contact in the first relay branch,
First power relay RL1 exports one end of the normally opened electric shock of another termination third relay K3 of normally opened contact, third relay
One end of the normally opened contact of the second relay of another termination K2 of device K3, another termination of the normally opened contact of the second relay K2
One end of one relay K1 coil, the cathode of another termination 24V power supply of the first relay K1 coil, power relay RL1's
Coil one terminates clean boot signal start, the cathode of another termination 24V power supply of the first power relay RL1 coil.
The cathode of one termination 24V power supply of the third power relay RL3 coil in the second relay branch, third power
Another termination first of relay RL3 coil inputs safety signal out1, the output normally opened contact of third power relay RL3
The anode of one termination 24V power supply, the other end of the output normally opened contact of third power relay RL3 meet one-way conduction diode D1
One end, one end of the normally opened contact K1-2 of the first relay of another termination K1 of one-way conduction diode D1, while connecing second
One end of the output normally opened contact of one end of the normally opened contact K2-2 of relay K2 and the second power relay RL2, the second power
The anode of one termination 24V power supply of relay device RL2 coil, another termination of the second power relay device RL2 coil, which is delayed, to be believed
Number delay；One end of another termination the second relay K2 coil of the normally opened contact K1-2 of first relay K1 and the second relay
The other end of the normally opened contact K2-2 of device K2, one end of another terminating resistor R1 of the second power relay RL2 normally opened contact
Meanwhile the cathode of one-way conduction diode D2 is connect, while the other end of resistance R1 is connect with the anode of one-way conduction diode,
The one end for connecting resistance R2, while connecting the anode of capacitor C1, the other end of resistance R2 connect with the cathode of capacitor C1 after with the
The other end connection of two relay K2 coils is followed by the cathode of 24V power supply.
The cathode of one termination 24V power supply of the 4th power relay RL4 coil in third relay branch, the 4th power
Another termination second of relay RL4 coil inputs safety signal input2, the normally opened touching of output of the 4th power relay (RL4)
The anode of one termination 24V power supply of point, the other end of the output normally opened contact of the 4th power relay RL4 connect two pole of one-way conduction
The anode of pipe D3, the cathode of one-way conduction diode D3 connect one end of the normally opened contact K1-3 of the first relay K1, while connecing
One end of the normally opened contact K3-3 of two relay K3；Another termination third relay of the normally opened contact K1-3 of first relay K1
The other end of the normally opened contact K3-3 of one end and third relay K3 of K3 coil, the other end connection of third relay K3 coil
The cathode of 24V power supply.
It include the normally-closed contact of the first relay K1 in the Safety output first branch in two-way redundant safety output circuit
With the normally opened contact of the second relay K2 and the normally opened contact of third relay K3, the anode of 24V power supply connects the first relay
One end of the normally-closed contact K1-4 of K1, the normally opened touching of the second relay of another termination of the normally-closed contact K1-4 of the first relay K1
One end of point K2-4, the one of the normally opened contact K3-4 of another termination third relay of the normally opened contact K2-4 of the second relay
End, the anode of another termination Safety output signal out1 of the normally opened contact K3-4 of third relay, Safety output signal out1
Cathode connect the cathode of 24V power supply；
It include the normally-closed contact of the first relay K1 in Safety output second branch in two-way redundant safety output circuit
With the normally opened contact of the second relay K2 and the normally opened contact of third relay K3, the anode of 24V power supply connects the first relay
One end of the normally-closed contact K1-5 of K1, the normally opened touching of the second relay of another termination of the normally-closed contact K1-5 of the first relay K1
One end of point K2-5, the one of the normally opened contact K3-5 of another termination third relay of the normally opened contact K2-5 of the second relay
End, the anode of another termination Safety output signal out2 of the normally opened contact K3-5 of third relay, Safety output signal out2
Cathode connect the cathode of 24V power supply.
Control method based on above-mentioned multifunctional safe circuit, comprising the following steps:
A, after input signal input1 and input signal input2 fault clearance, starting input signal start given one
A pulse-triggered enabling signal pushes the first power relay RL1 to pick up first when enabling signal start is high level, from
And push so that the first relay K1 is picked up, safety circuit starts, and the first relay K1 is normal the second safety relay branch
Contact closure is opened, the first relay K1 is closed in the normally opened contact of third safety relay branch, and the first relay K1 is in safety
Normally-closed contact in output circuit disconnects, and safety circuit output is cut off, when enabling signal start becomes low level, first
Normally-closed contact of the relay K1 in Safety output circuit restores normally closed, while the second relay and third relay are in output branch
Normally opened contact closure in road, the working condition that security system normally exports；
B, after circuit start, when the first safe input signal in the second relay branch is cut off, time delayed signal
Delay signal is kept, and the second relay K2 can be delayed power loss, and the second relay K2 is normal in the Safety output first branch at this time
Open contact can delay recovery be kept closed, when the capacitor electric discharge in the second relay branch is by the second both ends relay K2
When voltage is down to certain numerical value or less, the second relay K2 delay power loss, the second relay K2 is in the Safety output first branch
Normally opened contact restore it is normally opened, the Safety output voltage of two-way redundant safety output circuit is delayed by cutting；Third relay branch
When the second safe input signal in road is cut off, third relay K3 power loss immediately, third relay K3 is in Safety output the
Normally opened contact in two branches restores normally opened, and the Safety output voltage of two-way redundant safety output circuit is to sever immediately upon impact by the firing pin；
C, after system failure recovery, if the enabling signal start in the first safety circuit does not have rising edge trigger signal,
First relay K1, the second relay K2, the equal no power of third relay K3 coil, safety relay circuit also can not normal work
Make, two-way redundant safety output circuit is in the state of being cut off.
If the coil no power of the power relay RL2 in the second relay branch, relay RL2 is in invalid state,
The effect of second relay branch (3) is identical as the function of third relay branch (4), can cut off Safety output immediately.
If it is desired to cut off the function that the safe input signal in input third relay branch has delay cutoff output, then
By third relay local road design at the structure of the second relay branch.
If it is desired to which the safe input signal cut off in the second relay branch of input can cut off output immediately, then by second
Relay local road design at third relay branch structure.
Control method that the present invention is embodied as shown in figure 3, after input signal input1 and input2 fault clearance,
Clean boot input signal start gives a pulse-triggered enabling signal, when enabling signal start is high level, first
Power relay RL1 is pushed to pick up, to push so that the first relay K1 is picked up, safety circuit starts, the first relay K1
It is closed in the normally opened contact of the second safety relay branch, normally opened contact of the first relay K1 in third safety relay branch
Closure, normally-closed contact of the first relay K1 in Safety output circuit disconnect, and safety circuit output is cut off, and work as enabling signal
When start becomes low level, normally-closed contact of the first relay K1 in Safety output circuit restores normally closed, while the second relay
The normally opened contact closure of device and third relay in output branch, the working condition that security system normally exports:
When input signal input1 gives high level, after safety circuit starting, the second relay K2 is picked up, the second relay
Self-sustaining after oneself series connection normally opened contact closure of K2；Input signal input2 gives high level, and third relay K3 is picked up, third after
Self-sustaining after oneself series connection normally opened contact closure of electric appliance K3；Second relay K2 and third relay K3 is in the first relay branch
Normally-closed contact disconnect, the first relay branch is disconnected, and the first relay K1 is in the second relay branch and third relay
Normally opened contact in branch restores normally opened, normally opened contact closure of the second relay K2 in two-way redundant safety output circuit,
Normally opened contact closure in third relay K3 two-way redundant safety output circuit, due to the first relay K1 power loss, is pacifying
Normally-closed contact in full output circuit restores closure, and two-way redundant safety output circuit normally exports two-way 24V voltage.
Input time delay signal delay gives high level voltage in second relay branch, and the second relay RL2 is picked up,
24V power supply is charged by RL3, RL2, resistance R1, R2 to capacitor C1, and the charging time is determined jointly by resistance R1, R2 and capacitor C1；
When input signal input1 level is cut off, the output of second the second safety circuit of relay branch is cut off, and cutting mode has two
Kind, i.e. safety circuit output delay cutoff and safety circuit output is cut off immediately；
As shown in figure 3, safety circuit export delay cutoff: when input signal input1 be cut off, input time delay signal
Delay keeps high level constant, and capacitor C maintains the energization of the second relay K2 coil by diode D2, while passing through resistance
It discharges with power relay RL2, safety relay K2, the second safety relay time delayed turn-off after discharge off；Second safety after
Normally opened contact of the electric appliance in Safety output 1 restores normally opened, Safety output delay cutoff；
Safety circuit output is cut off immediately: when input signal input1 breaks down, while input delay signal is cut off,
The second power relay RL2 is cut off at this time, and third power relay RL3 is cut off, and capacitor C1 directly passes through conductive discharge
Without the second power relay RL2 and the second relay K2, the second relay K2 loses 24V immediately and directly cuts off, second after
Normally opened contact of the electric appliance in Safety output circuit restores normally opened, and Safety output circuit is cut off immediately；
After inputting input2 and being cut off, third relay K3 power loss immediately, third relay K3 is in Safety output
Normally opened contact restore it is normally opened, Safety output is cut off immediately；
After fault point is removed, need to give start rising edge trigger signal again, safety circuit could work again
Make；If without giving enabling signal start rising edge trigger signal again, even if input signal input1, input signal
Input2 signal fault releases, and the second relay and third relay can not be also powered on, the second relay and third relay
Normally opened contact of the device in two-way safety circuit is also that can not be closed, and system can not normal output voltage.
Claims (10)
1. a kind of multifunctional safe circuit, it is characterised in that: including power supply, be connected across the safety circuit of both ends of power and double respectively
Road redundant safety output circuit；Safety circuit is by the first power relay including the first relay (K1) and equipped with enabling signal
(RL1) the first relay branch, include the second relay (K2), the second power relay (RL2) equipped with input signal and
Second relay branch of delay circuit includes third relay (K3) and the 4th power relay equipped with input signal
(RL4) third relay branch is constituted；First relay (K1) is connected at least one normally-closed contacts of other branch relays,
And it is equipped with the normally opened contact from normally opened contact parallel connection of connecting with each other relays, and be series at the two-way redundancy peace
At least one normally-closed contact in every circuit of full output circuit；Second relay (K2) is equipped with and connects with the first relay (K1)
Normally-closed contact, with the first relay (K1) normally opened contact it is in parallel from normally opened contact of connect, and be series at two-way redundancy and pacify
At least one normally opened contact in every circuit of full output circuit；Third relay (K3) is equipped with and connects with the first relay (K1)
Normally-closed contact, with the normally opened contact of the first relay (K1) it is in parallel from normally opened contact of connecting, and be series at the two-way
At least one normally opened contact in every circuit of redundant safety output circuit；It is gone here and there respectively on the two-way redundant safety output circuit
Join the normally-closed contact of the first relay, the normally opened contact of the second relay and third relay.
2. multifunctional safe circuit according to claim 1, it is characterised in that: delay circuit includes being equipped with time delayed signal
Second power relay (RL2), one-way conduction diode (D2), resistance (R2) and capacitor (C1)；Second power relay device
(RL2) anode of a termination power of coil, another termination time delayed signal；The one of second power relay (RL2) normally opened contact
It terminates third power relay (RL3), another terminating resistor (R1) connects the cathode of one-way conduction diode (D2) simultaneously；Resistance
(R1) one end of resistance (R2) is connected while the other end is connect with the anode of one-way conduction diode, while connecting capacitor
(C1) anode, the other end with the second relay (K2) coil after the other end of resistance (R2) is connect with the cathode of capacitor (C1)
After connection.
3. multifunctional safe circuit according to claim 1, it is characterised in that: the power relay in the first relay branch
Device (RL1) exports the anode of a termination power of normally opened contact, and the first power relay (RL1) exports the other end of normally opened contact
Connect one end of the normally opened electric shock of third relay (K3), the second relay of another termination (K2) of third relay (K3) it is normally opened
One end of contact, one end of the first relay of another termination (K1) coil of the normally opened contact of the second relay (K2), first after
The coil one of the cathode of another termination power of electric appliance (K1) coil, the first power relay (RL1) terminates clean boot signal,
Another termination power cathode of the first power relay (RL1) coil.
4. multifunctional safe circuit according to claim 1, it is characterised in that: the third power in the second relay branch
The cathode of one termination power of relay (RL3) coil, another termination input safety letter of third power relay (RL3) coil
Number；The anode of one termination power of the output normally opened contact of third power relay (RL3), the output of power relay (RL3)
The other end of normally opened contact connects one end of one-way conduction diode (D1), another termination first of one-way conduction diode (D1) after
One end of the normally opened contact (K1-2) of electric appliance (K1), while connecing one end of the normally opened contact (K2-2) of the second relay (K2) and prolonging
When circuit be connected.One end of the second relay of another termination (K2) coil of the normally opened contact (K1-2) of the first relay (K1) and
The other end of the normally opened contact (K2-2) of second relay (K2).
5. multifunctional safe circuit according to claim 1, it is characterised in that: the in the third relay branch the 4th
Another termination of the cathode of one termination power of power relay (RL4) coil, the 4th power relay (RL4) coil inputs letter
Number, the anode of a termination power of the output normally opened contact of the 4th power relay (RL4), the 4th power relay (RL4)
The other end of output normally opened contact connects the anode of one-way conduction diode (D3), and the cathode of one-way conduction diode (D3) connects first
One end of the normally opened contact (K1-3) of relay (K1), while connecing one end of the normally opened contact (K3-3) of the second relay (K3)；
One end of another termination third relay (K3) coil of the normally opened contact (K1-3) of first relay (K1) and third relay
(K3) other end of normally opened contact (K3-3), the cathode of the other end connection power supply of third relay (K3) coil.
6. multifunctional safe circuit according to claim 1, it is characterised in that: in the two-way redundant safety output circuit
The Safety output first branch in power supply anode connect the first relay (K1) normally-closed contact (K1-4) one end, the first relay
One end of the normally opened contact (K2-4) of the second relay of another termination of the normally-closed contact (K1-4) of device (K1), the second relay
Normally opened contact (K2-4) connects the normally opened contact (K3-4) of third relay, the other end of the normally opened contact (K3-4) of third relay
Cathode for the anode of the first Safety output of the Safety output first branch, the first Safety output of the Safety output first branch connects
The cathode of power supply.
7. multifunctional safe circuit according to claim 1, it is characterised in that: in the two-way redundant safety output circuit
Safety output second branch in power supply anode connect the first relay (K1) normally-closed contact (K1-5) one end, the first relay
One end of the normally opened contact (K2-5) of the second relay of another termination of the normally-closed contact (K1-5) of device (K1), the second relay
(K2) one end of the normally opened contact (K3-5) of another termination third relay of normally opened electric shock, the normally opened contact of third relay
(K3-5) the other end is the anode of the second Safety output of Safety output second branch, the second peace of Safety output second branch
The cathode exported entirely connects the cathode of power supply.
8. multifunctional safe circuit according to claim 1, it is characterised in that: if it is desired to cut off input third relay branch
Safe input signal in road has the function of delay cutoff output, then third relay branch (4) is designed to the second relay
The structure of device branch (3).
9. multifunctional safe circuit according to claim 1, it is characterised in that: if it is desired to cut off the second relay branch of input
Safe input signal in road can cut off output immediately, then the second relay branch (3) is designed to third relay branch
(4) structure.
10. a kind of control method based on multifunctional safe circuit described in claim 1, it is characterised in that including following step
It is rapid:
A, when system jam, the safe input signal in the second relay branch is cut off, and time delayed signal keeps high level,
Second relay (K2) can be delayed power loss, and normally opened contact of the second relay (K2) in the Safety output first branch can be delayed extensive
It is kept closed again；When the voltage at the both ends the second relay (K2) is down to by the delay circuit in the second relay branch (3)
When below certain numerical value, the second relay (K2) is delayed power loss, and normally opened contact of the second relay (K2) in Safety output be extensive
Multiple normally opened, the Safety output of two-way redundant safety output circuit is delayed by cutting；
B, the safe input signal cutting in third relay branch (4), third relay (K3) power loss immediately, third relay
(K3) normally opened contact in Safety output restores normally opened, and the Safety output voltage of two-way redundant safety output circuit is cut immediately
It is disconnected；
C, after system failure recovery, if the no upper pulse triggering signal given again of enabling signal in the first safety circuit, the
One relay (K1), the second relay (K2), the equal no power of third relay (K3) coil, safety relay circuit can not be normal
Work, two-way redundant safety output circuit keep being cut off state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811635053.5A CN109659916B (en) | 2018-12-29 | 2018-12-29 | Multifunctional safety circuit and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811635053.5A CN109659916B (en) | 2018-12-29 | 2018-12-29 | Multifunctional safety circuit and control method thereof |
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| CN109659916A true CN109659916A (en) | 2019-04-19 |
| CN109659916B CN109659916B (en) | 2024-03-01 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112260393A (en) * | 2020-10-20 | 2021-01-22 | 新誉庞巴迪信号系统有限公司 | Automatic switching circuit and method for cold standby redundancy system |
| CN112653100A (en) * | 2020-12-16 | 2021-04-13 | 上海融和元储能源有限公司 | High-voltage box of energy storage system |
| CN113263962A (en) * | 2021-06-28 | 2021-08-17 | 南京国电南自轨道交通工程有限公司 | Rail transit emergency power-off system |
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|---|---|
| CN109659916B (en) | 2024-03-01 |
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