CN206992014U - Safety relay - Google Patents
Safety relay Download PDFInfo
- Publication number
- CN206992014U CN206992014U CN201720682493.0U CN201720682493U CN206992014U CN 206992014 U CN206992014 U CN 206992014U CN 201720682493 U CN201720682493 U CN 201720682493U CN 206992014 U CN206992014 U CN 206992014U
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- CN
- China
- Prior art keywords
- relay
- forced guiding
- contact
- optocoupler
- guiding relay
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
A kind of safety relay, S11 is through resistance R8 connection optocoupler PHC1 control terminal positive poles, optocoupler control terminal negative pole connection power supply indicator CH1, diode D6, resistance R6 are connected to through the first forced guiding relay KA1 contact KA1 3, it is grounded through the first forced guiding relay KA1 coils, forms one group of loop；S33 is connected to optocoupler PHC1 output head anodes, optocoupler PHC1 negative pole of output end connection resistance R3, and is reversely connected to resistance R4 through voltage-regulator diode DR1, is connected to the first forced guiding relay KA1 contact KA1 1 and is grounded；S33 connects the second forced guiding relay KA2 coils simultaneously, is connected to triode Q2 through switching diode D9, is connected to the first forced guiding relay KA1 contact KA1 1 and is grounded；S33 is connected to contact KA2 4 itself through the second forced guiding relay KA2 coils, is connected to power supply indicator CH2.
Description
Technical field
It the utility model is related to a kind of electrical control gear, more particularly to a kind of used in electrical safety control system
Safety relay.
Background technology
In the machine with safety requirements, common relay and PLC are widely used as control module, to safe work(
It can be monitored.From the point of view of surface, such machine can ensure safe handling under certain condition.But when it is common after
Electrical equipment or PLC are due to when self-defect or outside cause cause disabler（As contact melted, electric short circuit, processor are disorderly
Etc. failure）, safety protection function will be lost, after being taken such as electric jerk, because contact melted can not disconnect together, is led
Operator is caused personal safety accident easily occur.
Utility model content
The utility model is for deficiency, there is provided the safety relay that a kind of security performance greatly improves.
The technical scheme that the utility model solves above-mentioned technical problem is as follows：
A kind of safety relay, including shell, shell include housing, and upper end cover is connected with front side of housing, is connected on rear side of housing
Metal buckle is connected to, circuit board is provided with housing, binding post base and status indicator lamp, binding post is connected with circuit board
External wiring terminal is installed on base, external wiring terminal and the status indicator lamp corresponding tapping from upper end cover pass,
Characterized in that, be also associated with logic circuit on circuit board, be connected with logic circuit diode, triode, resistance, electric capacity,
Optocoupler and the first forced guiding relay KA1, the second forced guiding relay KA2, power supply access through L+, L-, rectified device,
S11 is positive source, and S21 is power cathode, while utilizes first forced guiding relay KA1 contacts KA1-1, KA1-3 and KA2
Contact KA2-2, KA2-4, the logic circuit is formed by external electronic component；S11 controls through resistance R8 connection optocouplers PHC1
Rectify pole, optocoupler control terminal negative pole connection power supply indicator CH1, be connected to through the first forced guiding relay KA1 contact KA1-3
Diode D6, resistance R6, it is grounded through the first forced guiding relay KA1 coils, forms one group of loop；S33 is connected to optocoupler
PHC1 output head anodes, optocoupler PHC1 negative pole of output end connection resistance R3, and reversely it is connected to resistance through voltage-regulator diode DR1
R4, the first forced guiding relay KA1 contact KA1-1 ground connection is connected to, forms one group of loop；S33 connects the last the second simultaneously
System is oriented to relay KA2 coils, is connected to triode Q2 through switching diode D9, is connected to the first forced guiding relay
KA1 contacts KA1-1 is grounded, and forms one group of loop；S33 is connected to contact itself through the second forced guiding relay KA2 coils
KA2-4, power supply indicator CH2 is connected to, and is grounded and to form one group of loop；S34 connection the second forced guiding relays KA2 is touched
Point KA2-2, switching diode D4 and voltage-regulator diode DR2 is reconnected, is connected to the first forced guiding relay KA1 coils, and
Ground connection forms one group of loop.
It is superfluous to realize circuit by using two forced guiding relays parallel connections and internal logic circuit for the utility model
Remaining, various structure, 1 group of auxiliary contact of Safety output, self detection and monitoring can be achieved, 3 groups of contacts of Safety output can be realized
Backfeed loop, two relays are forced guiding relay, are internally provided with guide rod, and can ensure to work as has one group of contact to melt
During weldering, remaining contact keeps more than 0.5mm spacing, improves the safety and reliability of electrical equipment.The above is arranged safely
Safety relay can be ensured in the case of defect itself or external fault by applying, and still possess security function, and can and
When fault detect is come out, so as to ensure that the normal operation of whole safety control system to the full extent, protect people
With the safety of machine.The safety relay is used in electrical safety control system, after connecting corresponding external wiring terminal, i.e.,
The self-monitoring of safety return circuit can be achieved, and certain electrical safety class requirement can be reached.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
Fig. 2 is the structural representation of circuit board in the utility model；
Fig. 3 is the structural representation of upper end cover in the utility model；
Fig. 4 is the structural representation of housing in the utility model；
Fig. 5 is circuit theory schematic diagram of the present utility model；
Fig. 6 is the circuit theory schematic diagram after the utility model application；
Fig. 7 is the logic circuit structure schematic diagram in the utility model；
In accompanying drawing：
1st, external wiring terminal；2nd, upper end cover；3rd, housing；4th, metal buckle；5th, binding post base；6th, state instruction
Lamp；7th, circuit board；8th, logic circuit；9th, the first forced guiding relay；10th, nameplate（The definition of display binding post and state refer to
Show）；11st, the second forced guiding relay.
Embodiment
Principle of the present utility model and feature are described below in conjunction with accompanying drawing, example is served only for explaining this practicality
It is new, it is not intended to limit the scope of the utility model.
As shown in Figures 1 to 7, a kind of safety relay, including shell, shell include housing 3, and the front side of housing 3 is connected with
Upper end cover 2, upper end cover 2 are above connected with nameplate 10.The rear side of housing 3 is connected with metal buckle 4, and circuit board 7 is provided with housing 3,
Binding post base 5 and status indicator lamp 6 are connected with circuit board 7, external wiring terminal 1 is installed on binding post base 5,
External wiring terminal 1 and the status indicator lamp 6 corresponding tapping from upper end cover 2 are passed, and logic electricity is also associated with circuit board 7
Road 8, diode, triode, resistance, electric capacity, optocoupler and the first forced guiding relay KA19, are connected with logic circuit 8
Two forced guiding relay KA2, power supply access through L+, L-, and rectified device, S11 is positive source, and S21 is power cathode, simultaneously
Using first forced guiding relay KA1 contacts KA1-1, KA1-3 and KA2 contact KA2-2, KA2-4, by external electronic component
Form the logic circuit；S11 is through resistance R8 connection optocoupler PHC1 control terminal positive poles, optocoupler control terminal negative pole connection power supply instruction
Lamp CH1, diode D6, resistance R6 are connected to through the first forced guiding relay KA1 contact KA1-3, through the first forced guiding after
Electrical equipment KA1 coils are grounded, and form one group of loop；S33 is connected to optocoupler PHC1 output head anodes, and optocoupler PHC1 negative pole of output end connects
Connecting resistance R3, and resistance R4 reversely is connected to through voltage-regulator diode DR1, it is connected to the first forced guiding relay KA1 contacts
KA1-1 is grounded, and forms one group of loop；S33 connects the second forced guiding relay KA2 coils simultaneously, connects through switching diode D9
Triode Q2 is connected to, the first forced guiding relay KA1 contact KA1-1 ground connection is connected to, forms one group of loop；S33 is through
Two forced guiding relay KA2 coils are connected to contact KA2-4 itself, are connected to power supply indicator CH2, and be grounded formation one
Group loop；S34 connection the second forced guiding relay KA2 contact KA2-2, reconnect switching diode D4 and voltage-regulator diode
DR2, the first forced guiding relay KA1 coils are connected to, and are grounded and to form one group of loop.
The utility model can realize following functions after power supply and outside line are connected：
After the completion of according to theory diagram wiring, direct current 24V power supplys are connected, then the rectified devices of S11 are positive source, S21
For power cathode, because external security part normal condition is normal open state, so S11-S33, S21-S22 are in turning on
State, and S33-S34 is also switched under runback bit pattern, S34 is positive source, and electric current is through one group of close point of KA2 relays, to two
Pole pipe D4 and voltage-regulator diode DR2, then by the first forced guiding relay KA1 coils to S22, loop is formed, then the last the first
System is oriented to relay KA1 actions；First forced guiding relay KA1 relay normally open points are then acted as conducting state, by power supply
Positive pole S11, electric current are forced to lead through resistance R8, optocoupler and the first forced guiding relay KA1 contacts to diode D6, then through first
Loop is formed to relay KA1 coils, then CH1 is lighted, the first forced guiding relay and the first forced guiding relay KA1 is moved
Make state holding.
Because optocoupler control terminal is opened, so in positive source S33, electric current through optocoupler output to voltage-regulator diode DR1,
Then triode Q2 is turned on, therefore in positive source S33, electric current, to diode D9, then passes through through the second forced guiding relay KA2 coils
Triode Q2 to resistance R5, under electric capacity CE1 discharge conditions, flow through optocoupler control terminal formed loop, then the second forced guiding after
Electrical equipment KA2 is acted；After action, electric current is born through second mono- group of contact of forced guiding relay KA2 to CH2 indicator lamps, then to power supply
Pole S21, then CH2 is lighted, and the second forced guiding relay KA2 actions are kept.
First forced guiding relay KA1 and the second forced guiding relay KA2 residue contact shunts are as safety relay
The safety contact and auxiliary contact of device.
The utility model includes circuit board, plastic casing and external wiring terminal, and circuit board is arranged in shell, shell by
Upper end cover, housing and metal buckle composition, the slot provided with power circuit board installation in housing cover upper end cover, on circuit board
Binding post base and status indicator lamp are placed exactly in the respective tapping on upper end cover, convenient to install external wiring terminal.Gold
Category buckle is fastened on the left and right sides of housing, is also secured on 35mm standards installation guide rail.
Circuit board includes power supply processing circuit, logic circuit and the first forced guiding relay, the in the utility model
Two forced guiding relays, logic circuit are made up of diode, triode, electrochemical capacitor and optocoupler, achievable electric property
External power source, safety component are connected including binding post（Jerk or safety door switch）And reset（Automatic or manual）After circuit,
Optocoupler is controlled by the on state characteristic of diode, triode, forms internal logic control loop, is led with two groups of pressures that control is in parallel
Certain reset buffer time is obtained to the break-make of relay coil, and by electrochemical capacitor discharge and recharge, to ensure Safety output
Open and-shut mode when safety component works, while export one group of contact and feed back to control system.
External wiring terminal S33 and S34 short circuit in the utility model, which can be realized, to automatically reset, S33 and S34 Indirect reductions
Button can realize hand-reset.
Need to provide direct current 24V power supplys outside the utility model, in the utility model, 3 groups of relay contact output is normally opened
Contact, feedback control loop is provided for external contactor or relay, relay contact also exports 1 group of normally closed auxiliary contact, uses
It is whether normal to monitor the security function of safety relay.The utility model is additionally provided with connection scram button, safety door switch
With the external wiring terminal of SR.The redundant circuit of self-monitoring is carried in circuit, even if there is a forced guiding relay
Device damages, and security function of the present utility model is still effective, by the way that correctly disconnect and close can be with each switch periods
The security function of automatic detection relay.
Circuit board in the utility model is arranged in shell, is connected by external wiring terminal with external devices, is formed
Safety control module, the utility model are fixedly installed in the 35mm D type clamp rails of regulator cubicle entirely through metal buckle.
Building block on circuit board includes binding post base, status indicator lamp, logic circuit and first, second and forced
It is oriented to relay.External wiring terminal and binding post base engagement, connect corresponding external devices.When external scram button,
SR is when releasing state, then the status indicator lamp POWER on circuit board lights, while the first forced guiding relay
KA1, the second forced guiding relay KA2 adhesives, status indicator lamp are lighted, and export 3 close points and 1 prescribes signal, and state
Keep；When scram button or safety door switch are pressed, controlled by logic circuit, the first forced guiding relay KA1,
Two forced guiding relay KA2 disconnect, and status indicator lamp goes out, output 3 prescribe with 1 close point signal, and state is kept；Work as urgency
When stopping button and releasing again, logic circuit controls the first forced guiding relay KA1, the second forced guiding relay KA2 to keep
Off-state, only when SR is pressed, the first forced guiding relay KA1, the second forced guiding relay KA2 coils
Just electric adhesive, export 3 close points and 1 and prescribe signal, and state is kept.Forced guiding relay includes the first forced guiding
Relay KA1, second two relays of forced guiding relay KA2, and two relays are parallel connection, ensure that a relay goes out
When now abnormal, another relay can normal output contact state.
Perforate installation stationary state indicator lamp and external wiring terminal on the upper end cover of plastic casing, upper end cover attachment inscription
Board, terminal connections operation is carried out for indicating corresponding external cabling signal definition, and by using specification.
The enclosure interior of plastic casing lower end is provided with slot and positioning convex, for fixing circuit board, has metal buckle to consolidate
Fixed shell left and right sides, and D type grooves are provided and carry out the installation of D types clamp rail；Housing side mounts nameplate.
Wiring is carried out to the safety relay by nameplate and operation instructions, external dc 24V power supplys pass through L+, L- end
Son access, S11-S33 and S21-S22 is two-way input signal, connects external security part output contact（As scram button two-way closes
Point）, S33-S34 is reset loop, external SR, then forms hand-reset, and short circuit is then formed and automatically reset, and is resetted and prolonged
When the time controlled by logic circuit, 13-14,23-24 and 33-34 are safety contact, external external communication contactor or breaker
Whether corresponding contacts, 41-42 are auxiliary contact, are external to PLC, normal to monitor safety relay action.
After energization, safety relay power supply indicator POWER is lighted, and safety relay directly monitors external security part
（Such as scram button, safety door switch）Working condition, as scram button releases, it indicates that lamp CH1, CH2 are lighted, output 3
Group close point, to connect external equipment（Such as ac contactor coil）, while 41-42 exports one and prescribes signal to PLC, system
Scram button is judged to release state.When scram button is pressed, indicator lamp CH1, CH2 extinguish, and output 3 prescribes, and disconnect outer
Portion's equipment, and a close point signal is exported to PLC, system judges that now scram button working condition is disconnection.Work as scram button
When releasing again, indicator lamp CH1, CH2 can not be lighted, it is necessary to judge that S33-S34 resets loop state, when the conducting of reset loop
（Or SR is connected）When, indicator lamp CH1, CH2 can just be lighted, and this process can ensure that operating personnel reaffirm operation link
After safety, machine could operate.
As shown in fig. 6, be the application principle figure of the safety relay, external security part（Scram button, safety door switch
Or light curtain）Connection safety relay ` helps contact to be connected to PLC, to monitor safety relay working condition, while PLC output signals
The outside breaker of control, forms reset feedback loop, it is ensured that in contactor attracting state by SR and external contactor
When, reset that loop is invalid, and during ensureing electric normal operation, the reset loop does not work.
Claims (2)
1. a kind of safety relay, including shell, shell includes housing（3）, housing（3）Front side is connected with upper end cover（2）, housing
（3）Rear side is connected with metal buckle（4）, housing（3）It is interior to be provided with circuit board（7）, circuit board（7）On be connected with binding post base
（5）And status indicator lamp（6）, binding post base（5）On external wiring terminal is installed（1）, external wiring terminal（1）And shape
State indicator lamp（6）From upper end cover（2）Tapping corresponding to upper passes, it is characterised in that circuit board（7）On be also associated with logic electricity
Road（8）, logic circuit（8）On be connected with diode, triode, resistance, electric capacity, optocoupler and the first forced guiding relay KA1
（9）, the second forced guiding relay KA2（11）, the rectified device of DC24V power supplys, power supply is provided for safety relay, is utilized simultaneously
First forced guiding relay KA1（9）Contact KA1-1, KA1-3 and second forced guiding relay KA2 contacts KA2-2, KA2-
4, the logic circuit is formed by external electronic component；Electric current is through resistance R8 connection optocoupler PHC1 control terminal positive poles, optocoupler
PHC1 control terminals negative pole connects power supply indicator CH1, and diode is connected to through the first forced guiding relay KA1 contact KA1-3
D6, resistance R6, it is grounded through the first forced guiding relay KA1 coils, forms one group of loop；It is galvanically connected to optocoupler PHC1 outputs
Rectify pole, optocoupler PHC1 negative pole of output end connection resistance R3, and be reversely connected to resistance R4 through voltage-regulator diode DR1, reconnect
It is grounded to the first forced guiding relay KA1 contact KA1-1, forms one group of loop；Electric current simultaneously connect the second forced guiding after
Electrical equipment KA2 coils, triode Q2 is connected to through switching diode D9, is connected to the first forced guiding relay KA1 contacts
KA1-1 is grounded, and forms one group of loop；Electric current is connected to contact KA2-4 itself through the second forced guiding relay KA2 coils, then
Power supply indicator CH2 is connected to, and is grounded and to form one group of loop；Electric current connects the second forced guiding relay KA2 contact KA2-
2, switching diode D4 and voltage-regulator diode DR2 is reconnected, is connected to the first forced guiding relay KA1 coils, and be grounded shape
Into one group of loop.
2. safety relay according to claim 1, it is characterised in that the upper end cover（2）Above it is also associated with nameplate
（10）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720682493.0U CN206992014U (en) | 2017-06-13 | 2017-06-13 | Safety relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720682493.0U CN206992014U (en) | 2017-06-13 | 2017-06-13 | Safety relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206992014U true CN206992014U (en) | 2018-02-09 |
Family
ID=61396462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720682493.0U Expired - Fee Related CN206992014U (en) | 2017-06-13 | 2017-06-13 | Safety relay |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206992014U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111477500A (en) * | 2020-03-31 | 2020-07-31 | 南京优倍电气有限公司 | Starting circuit for safety relay compatible with three reset modes |
| CN112855436A (en) * | 2021-03-25 | 2021-05-28 | 远景能源有限公司 | Safety device for wind driven generator |
-
2017
- 2017-06-13 CN CN201720682493.0U patent/CN206992014U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111477500A (en) * | 2020-03-31 | 2020-07-31 | 南京优倍电气有限公司 | Starting circuit for safety relay compatible with three reset modes |
| CN111477500B (en) * | 2020-03-31 | 2022-03-25 | 南京优倍电气技术有限公司 | Starting circuit for safety relay compatible with three reset modes |
| CN112855436A (en) * | 2021-03-25 | 2021-05-28 | 远景能源有限公司 | Safety device for wind driven generator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180209 Termination date: 20180613 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |