JPH0243230B2 - - Google Patents

Description

[Detailed description of the invention] 〔Technical field〕 This invention relates to a control panel.

[Background technology]

As shown in FIG. 1, a conventional control panel is separated into a control section housed in a control panel body case (not shown) and an operation display section attached to a control panel door (not shown) or the like. The control unit and the operation control unit are connected to two common lines CL′ ₁ , CL′ ₂ and 11 dedicated lines FL′ ₁ ~
It is connected by a total of 13 crossover wires with EL' ₁₁ (11n in the n system).

This control panel will be explained in detail below. First, the operation when the changeover switch SW ₁ is set to the "auto" position and the changeover switch SW ₂ is set to the "auto" position will be described. When external contact k turns on, power terminal R - common line CL ₁ - changeover switch SW ₁
- Dedicated line EL' ₄ - External contact k - Dedicated line EL' ₅ - Changeover switch SW ₂ - Dedicated line EL' ₂ - Input terminal T of automatic alternate operation relay circuit AR ₁ - Output terminal T of automatic alternate operation relay circuit AR ₂ - Electromagnetic contactor MC ₁ - Switching contact tr ₁ of thermal relay TR ₁ - A current flows through the path of power supply terminal S, and electromagnetic contactor MC ₁ is excited. As a result, the main contacts of the magnetic contactor MC ₁ are mc _1A , mc _1B ,
mc _1C is turned on and power is supplied to load LD ₁ via thermal relay TR ₁ . Also, its auxiliary contact MC _1E
When the auxiliary contact mc _1D is turned on, the stop indicator lamp GL ₁ , which indicates that the load LD 1 has stopped, turns off, and when the auxiliary contact mc _1D is turned on, the operation indicator lamp RL ₁ , which indicates that the load LD ₁ is operating, turns off.
lights up.

Thereafter, when the external contact k is turned off, the energization path to the electromagnetic contactor MC ₁ is opened, and the excitation of the electromagnetic contactor MC ₁ is stopped. As a result, the magnetic contactor MC ₁
The main contacts mc _1A , mc _1B , mc _1C are turned off and the load
Power supply to LD ₁ is stopped. Also, its auxiliary contact
When mc _1E is turned on, stop indicator lamp GL ₁ lights up,
Similarly, when the auxiliary contact mc _1D is turned off, the operation display lamp RL′ ₁ is turned off. Furthermore, at this time, the input terminal T ₁ of the automatic alternating operation relay circuit AR is the output terminal.
It is connected to output terminal T ₃ instead of T ₂ and this state is maintained.

After that, when external contact k is turned on again, power terminal R - common line CL ₁ - changeover switch SW ₁ - exclusive line
EL' ₄ - External contact k - Dedicated line EL' ₅ - Selector switch
SW ₂ − Dedicated line EL′ ₂ − Automatic alternate operation relay circuit AR
Input terminal T ₁ - Output terminal T ₃ of automatic alternating operation relay circuit AR - Magnetic contactor MC ₂ - Thermal relay
A current flows through the path from the switching contact tr ₂ of TR ₂ to the power supply terminal S, and the electromagnetic contactor MC ₂ is excited. the result,
The main contacts mc _2A , mc _2B , and mc _2C of the electromagnetic contactor MC ₂ are turned on, and power is supplied to the load LD ₂ via the thermal relay TR ₂ . In addition, when the auxiliary contact mc _2E is turned off, the stop indicator lamp GL ₂ indicating that the load LD ₂ has stopped is turned off.
turns off, and when the auxiliary contact mc _2D turns on, the operation display run RL ₂ indicating the operation of the load LD ₂ lights up.

Thereafter, when the external contact k is turned off, the energization path to the electromagnetic contactor MC ₂ is opened, and the excitation of the electromagnetic contactor MC ₂ is stopped. As a result, the magnetic contactor MC ₂
The main contacts mc _2A , mc _2B , mc _2C turn off and the load
Power supply to LD ₂ is stopped. Also, its auxiliary contact
When mc _2E is turned on, stop indicator lamp GL ₂ lights up,
Similarly, when the auxiliary contact mc _2D is turned off, the operation indicator lamp RL ₂ is turned off. Furthermore, at this time, the input terminal T ₁ of the automatic alternating operation relay circuit AR becomes the output terminal T ₃
Instead, it is connected to output terminal _T2 , and this state is maintained.

After that, the above operation is repeated according to the on/off of external contact k, and the load is increased every time external contact k is turned on.
LD ₁ and LD ₂ are driven alternately.

Now, external contact k is turned on and the electromagnetic contactor
When MC ₁ is energized and power is being supplied to load LD ₁ , if a fault occurs in load LD ₁ and thermal relay TR ₁ trips, its switching contact tr ₁ becomes NO.
The alarm relay ALX _{' 1} is energized, its contact alx' ₁ is turned on, and the fault indicator lamp OL ₁ lights up.

In addition, external contact k turns on and the magnetic contactor
When MC ₂ is energized and power is being supplied to load LD ₂ , if a fault occurs in load LD ₂ and thermal relay TR ₂ trips, its switching contact tr ₂ will switch to NO.
The alarm relay ALX _{' 2} is energized, its contact alx' ₂ is turned on, and the fault indicator lamp OL ₂ lights up.

Next, when the changeover switch SW ₂ is set to the ``No. 1'' position while the changeover switch SW <sub>1</sub> remains in the ``auto'' position, the automatic alternate operation relay circuit AR will no longer operate. At this time, only the load LD ₁ is operated every time the external contact k is turned on.

On the other hand, if changeover switch SW ₁ is left in the ``auto'' position and changeover switch SW <sub>2</sub> is moved to the ``No.2'' position,
At this time, the automatic alternate operation relay circuit AR is no longer activated, and the load LD ₂ is reduced every time external contact k is turned on.
only will operate.

Next, when the changeover switch _SW1 is set to the "off" position, the magnetic contactor _MC1 , regardless of the on/off state of the external contact k and the state of the changeover switch _SW2 .
None of the MC ₂ is energized and the load
The operation of LD ₁ and LD ₂ will stop. Other parts also operate corresponding to the electromagnetic contactors MC ₁ and MC ₂ .

Next, when the changeover switch _SW1 is set to the "test" position, it is the same as turning on the external contact k in the "auto" position, and an operation test can be performed.

Another conventional control panel, as shown in Figure 2, controls the water level of the water tank WT using a control section' and an operation display section.
The control contact flr ₁ corresponds to the external contact k in Fig. 1,
The circuit operates in the same way as the circuit shown in FIG. 1 depending on whether the control contact flr ₁ is turned on or off.

The floatless relay FLR detects the water level in the water tank WT using electrodes E ₀ to _{E 3} installed inside the water tank WT, and turns on the control contact FLR ₁ when the water level rises above L ₂ . Control contact flr ₁ is turned off when the water level falls below L ₁ , and alarm contact flr ₂ is turned on when the water level rises above L ₃ . When control contact flr ₁ turns on, the drain pump, which is the load, is activated and the control contact
When flr ₁ turns off, the operation of the drainage pump is stopped, and when alarm contact flr ₂ turns on, power terminal R - alarm contact flr ₂ - exclusive line EL' ₁₂ - water tank full warning lamp
OL ₃ - Power is applied through the power terminal S path, and the water tank full warning lamp OL ₃ lights up.

Other details are the same as in FIG.

However, such a conventional control panel requires a large number of crossover wires, and has drawbacks such as difficulty in wiring the crossover wires and the difficulty in opening and closing the control panel door due to the crossover wires.

[Purpose of the invention]

An object of the present invention is to provide a control panel that can reduce the number of crossover wires.

[Disclosure of the invention]

In the control panel of the present invention, the connection state between the input terminal and the first and second output terminals is alternately switched each time an external signal is input from the control unit through the first dedicated crossover wire, and the external signal is input. an automatic alternating operation relay circuit of the operation display unit to which a voltage is applied to the input terminal at the time; and a first operation relay of the control unit to which one side half-wave current is applied from the first output terminal through a second dedicated crossover wire. , a second operation relay of the control unit that is energized in one half wave from the second output terminal through a third dedicated crossover wire, and a first load control relay of the control unit that responds to the first operation relay. When the electromagnetic contactor, the second load control electromagnetic contactor of the control unit that responds to the second operation relay, and the first load control electromagnetic contactor are activated, the second dedicated crossover wire is passed through the other. A first reception relay of the operation display section is energized in a half-wave on one side, and a first reception relay on the operation display section is energized in a half-wave on the other side through the third dedicated crossover wire when the second electromagnetic contactor for load control is activated. This configuration includes two reception relays, and first and second indicators of an operation display section that respond to the first and second reception relays, respectively.

With this configuration, 3
By simply providing a dedicated crossover wire, alternating operation control and operation and stop indication can be performed, and by adding a flicker signal, the number of signals can be further increased.

A first embodiment of this invention will be described based on FIG. This control panel consists of a control section housed in the control panel body case and an operation display section attached to the control panel door or remote operation display panel, etc. These are connected to two common lines CL ₁ and CL 2, and three common lines CL ₁ and CL 2. dedicated line
We are contacting you at EL ₁ to EL ₃ .

This will be explained in more detail below. First, set changeover switch SW ₁ to the "auto" position, and then turn changeover switch SW ₂ to the "auto" position.
The operation when is set to the "self-crossing" position will be explained. When external contact k turns on, AC12V power terminal r → external contact k → dedicated line EL ₃ → changeover switch SW ₁ → changeover switch SW ₂ → input terminal T of automatic alternate operation relay circuit AR ₁ → automatic alternate operation relay circuit
AR output terminal T ₂ → Diode D ₁ → Dedicated line EL ₁ →
Diode D ₂ → Resistor R ₁ → Operation relay X ₁ → Contact alx _1A of alarm relay ALX ₁ → Half-wave current is applied on one side through the path of power terminal s, and operation relay X ₁ is excited.
As a _{result , contact x 1A of} operation relay Contactor MC ₁ is excited, main contacts mc _1A , mc _1B , and mc _1C are turned on, and power is supplied to load LD ₁ through thermal relay TR ₁ . In addition, by turning on the auxiliary contact mc _1D of the magnetic contactor MC ₁ , the power terminal s → contact mc _1D → diode D ₃
→ Dedicated line EL ₁ → Diode D ₄ → Receiving relay Z ₁ → Common line CL ₁ → Half-wave current is applied to the other side in the path of power terminal r, receiving relay Z ₁ is energized, and contact z _1A is turned on to operate. The indicator lamp RL ₁ lights up, the contact z _1B turns off, and the stop indicator lamp GL ₁ goes out.

After that, when the external contact k is turned off, the energization to the operation relay X ₁ in the above path is stopped, the contact x _1A is turned off, and the energization to the magnetic contactor MC ₁ is stopped.
Contacts mc _1A , mc _1B , mc _1C are turned off and the load LD ₁
The power supply to the device stops. At the same time, contact mc _1D turns off and power to reception relay Z ₁ stops, contact z _1A turns off and operation indicator lamp RL ₁ goes out, and contact z _1B turns on and the stop indicator lamp turns off. GL ₁
lights up. Furthermore, at this time, the input terminal _T1 of the automatic alternate operation relay circuit AR is connected to the output terminal _T3 instead of the output terminal _T2 .

After that, when external contact k is turned on again,
AC12V power terminal r → external contact k → dedicated line EL ₃
→ Changeover switch SW ₁ → Changeover switch SW ₂ → Input terminal T ₁ of automatic alternate operation relay circuit AR → Output terminal T ₃ of automatic alternate operation relay circuit AR → Diode D ₅ →
_{Dedicated line} EL _{2 →} Diode D ₆ → Resistor _{R 2} → Operation relay As a result, the contacts of the operating relay x ₂ x _2A
is turned on, power is applied through the path of power terminal R - contact x _2A - magnetic contactor MC ₂ - switching contact tr _{2 of thermal relay TR 2 -} power terminal S, magnetic contactor MC ₂ is energized, and main contact MC _2A , mc _2B , and mc _2C turn on, and power is supplied to thermal relay TR ₂ circular load LD ₂ . In addition, by turning on the auxiliary contact mc _2D of the magnetic contactor MC ₂ , the power terminal s → contact mc _2D →
Diode D ₇ → Dedicated line EL ₂ → Diode D ₈ → Receiving relay Z ₂ → Common line CL ₁ → Half-wave current is applied to the other side in the path of power terminal r, and receiving relay Z ₂ is excited and contacts
z _1A turns on and operation indicator lamp RL ₂ lights up, and contact z _2B turns off and stop indicator lamp GL ₂ goes out.

After that, when _the external contact k is turned off, the power supply to the operation relay X ₂ in the above path is stopped, _the contact
Contacts mc _2A , mc _2B , mc _2C are turned off and the load LD ₂
The power supply to the device stops. At the same time, contact mc _2D turns off and power to reception relay Z ₂ stops, contact z _2A turns off and operation indicator lamp RL ₂ goes out, and contact z _2B turns on and the stop indicator lamp turns off. GL ₂
lights up. Furthermore, at this time, the input terminal _T1 of the automatic alternate operation relay circuit AR is connected to the output terminal _T2 instead of the output terminal _T3 .

Thereafter, the above operation is repeated, and the loads LD ₁ and LD ₂ are driven alternately every time the external contact k is turned on.

When the load LD ₁ is being driven, the load
When a failure occurs in LD ₁ and thermal relay TR ₁ trips, its switching contact tr ₁ switches to the NO side,
The power supply to the electromagnetic contactor MC ₁ is stopped, the power supply to the load LD ₁ is stopped, the operation indicator lamp RL ₁ suddenly goes out, and the stop indicator lamp GL ₁ suddenly turns on.
In addition, by switching the NO side of switching contact tr ₁ , power terminal R - alarm relay ALX ₁ - switching contact tr ₁ - power terminal S
Alarm relay ALX ₁ is energized through the route , and as a result, contact alx _1A is turned off and power to operation relay X ₁ is stopped, and contact alx _1B is turned on and flicker relay FCR is activated. , contact fcr of flicker relay FCR repeats on and off, and contact alx _1C of alarm relay ALX ₁ turns on, so power terminal s → contact fcr → contact alx _1C → diode D ₃ →
Dedicated line EL ₁ → diode D ₄ → receiving relay Z ₁ → common line CL ₁ → power is intermittently energized in the path of power terminal r, and as a result, receiving relay Z ₁ is intermittently energized, and the contact
z _1A repeatedly turns on and off, causing the operation indicator lamp RL ₁ to blink, and conversely, contact z _1B repeatedly turns on and off, causing the stop indicator lamp GL ₁ to blink, indicating a failure in the load LD ₁ .

When the load LD ₂ is being driven, the load
When a failure occurs in LD ₂ and thermal relay TR ₂ trips, its switching contact tr ₂ switches to the NO side,
The power supply to the electromagnetic contactor MC ₂ is stopped, the power supply to the load LD ₂ is stopped, the operation indicator lamp RL ₂ suddenly goes out, and the stop indicator lamp GL ₂ suddenly turns on.
In addition, by switching the switching contact tr ₂ to the NO side, the power terminal R - alarm relay ALX ₂ - switching contact tr ₂ - power terminal S
Alarm relay ALX ₂ is energized through the route , and as a result, contact alx _2A is turned off and power to operation relay X ₂ is stopped, and contact alx _2B is turned on and flicker relay FCR is activated. , contact fcr of flickering relay FCR repeats on and off, and contact alx _2C of alarm relay ALX ₂ turns on, so power terminal s → contact fcr → contact alx _2C → diode D ₇ →
Dedicated line EL ₂ → diode D ₈ → receiving relay Z ₂ → common line CL ₁ → power is intermittently energized in the path of power terminal r, and as a result, receiving relay Z ₂ is intermittently energized, and the contact
z _2A repeatedly turns on and off, causing the operation indicator lamp RL ₂ to blink, and conversely, contact z _2B repeatedly turns on and off, causing the stop indicator lamp GL ₂ to blink, indicating a failure of the load LD ₂ .

Next, when the changeover switch SW ₂ is set to the "No. 1" position, the operation of the automatic alternate operation relay circuit AR is stopped. At this time, the load LD ₁ operates every time the external contact k is turned on, and the load LD ₂ does not operate at all. In addition, the operation until load LD ₁ is activated and the operation until it is displayed are as follows.
The operation is similar to that corresponding to LD ₁ .

On the other hand, when the changeover switch SW ₂ is set to the "No. 2" position, only the load LD ₂ is operated every time the external contact k is turned on, contrary to the above.

Next, when the changeover switch SW ₁ is set to the "off" position, the load LD ₁ ,
The power supply operation to LD ₂ will stop.

Next, when the changeover switch SW ₁ is set to the "test" position, the same operation as when the external contact k is turned on is performed, and an operation test can be performed.

Now, the operation of the automatic alternate operation relay circuit AR will be explained here. In this automatic alternate operation relay circuit AR, in the initial state, switching contacts ry _1A and ry _1B of the latching relay RY are switched to the a side. When external contact k turns on,
AC12V alternating voltage is applied, and after this is full-wave rectified by diode bridge DB ₁ , it is connected to resistor R ₃ .
The voltage is regulated by a constant voltage diode ZD,
This voltage charges capacitor C ₃ through diode D ₉ , contact ry _1B and diode D ₁₀ . At this time, the transistor Q ₁ is turned off due to the reverse bias caused by the resistors R ₄ and R ₅ . After that, when external contact k is turned off and no AC voltage is applied, the reverse bias due to resistors R ₄ and R ₅ disappears,
Transistor _Q1 is turned on, and the charge on capacitor _C3 is transferred to the setting coil ST of latching relay RY.
is discharged through diode _D11 and transistor _Q1 , and this discharge current causes the latching relay to
RY contacts ry _1A and ry _1B switch from the a side to the b side.

Then, when external contact k is turned on again, capacitor C ₄ is charged through contact ry _1B and diode D ₁₂ , and when external contact k is turned off, the charge on capacitor C ₄ is transferred to latching relay RY. The discharge current is discharged through the reset coil RS, diode _D13 and transistor _Q1 , and this discharge current connects the contacts _ry1A of the latching relay RY,
ry _1B switches from side b to side a.

Thereafter, the above operation will be repeated every time the external contact k is turned on and off.

The power supply for lighting the operation indicator lamps RL ₁ and RL ₂ and the stop indicator lamps GL ₁ and GL ₂ is as follows.
The AC12V voltage sent through the common lines CL ₁ and CL ₂ is obtained by rectifying and smoothing it with a diode bridge DB ₂ and a capacitor C ₅ .

Capacitors C ₁ and C ₂ connected in parallel to operation relays X ₁ and X ₂ respectively are connected to operation relays with resistors R ₁ and R ₂ .
It constitutes a delay circuit that delays the operation of X ₁ and X ₂ . x _1B and x _2B are contacts of operation relays X ₁ and X ₂ , respectively. C ₆ and C ₇ are capacitors.

With this configuration, the two common lines CL ₁ ,
By simply providing CL ₂ and three dedicated lines EL ₁ to EL ₃ (for one system), alternate operation control and operation, stop, and failure indication can be performed.

A second embodiment of the invention will be described based on FIG. 4. This control panel consists of a control section and an operation display section, and controls the water level of the water tank WT.The control contact flr ₁ of the floatless relay FLR corresponds to the external contact k in Fig. 1. control contacts
The circuit operates similarly to the circuit shown in FIG. 3 depending on whether flr ₁ is turned on or off. i.e. control contacts
When flr ₁ is turned on, power terminal r → common line CL ₁ →
Relay Y ₁ → Diode D ₁₄ → Dedicated line EL ₃ → Diode D ₁₅ → Control contact flr ₁ → Half-wave current is applied to one side in the path of power terminal s, relay Y ₁ is excited, contact Y ₁ is turned on, and after that The operation is exactly the same as when external contact k is turned on. When control contact flr ₁ turns off, relay Y ₁ is de-energized and contact y ₁
is turned off, and thereafter the same operation as when external contact k is turned off is performed.

The floatless relay FLR detects the water level in the water tank WT using electrodes E ₀ to _{E 3} set inside the water tank WT, and turns on the control contact FLR ₁ when the water level rises above L ₂ . Control contact flr ₁ is turned off when the water level falls below L ₁ , and alarm contact flr ₂ is turned on when the water level rises above L ₃ . Then, when control contact flr ₁ turns on, the drain pump, which is the load, is activated and the control contact
When flr ₁ is turned off, the drain pump stops operating. On the other hand, when alarm contact flr ₂ turns on, power terminal s → alarm contact flr ₂ → diode D ₁₆ → dedicated line
EL ₃ → Diode D ₁₇ → Relay Y ₂ → The other half-wave is energized in the path of power terminal r, and relay Y ₂ is energized.
Contact y ₂ turns on and the water tank full warning lamp OL ₁
lights up.

C ₈ and C ₉ are capacitors.

As a result of this configuration, a signal for warning of full water can be further sent from the control section to the operation display section without increasing the number of crossover wires.

Other configurations and effects are similar to those of the first embodiment. Note that illustration of the load circuit is omitted.

Furthermore, if the control unit has a built-in means for intermittent current flowing through the relay _Y2 , and the above intermittent means is operated by a contact that turns on when the water tank W is out of water, the lamp _OL1 will blink during the outage. It is possible to issue a drought warning when the water is full.

〔Effect of the invention〕

According to the control panel of this invention, it is possible to perform round-trip signal transmission with a single signal, and the effect is that it is possible to control alternate operation and display operation and stop with a small number of crossover wires. There is.

[Brief explanation of drawings]

Figure 1 is a circuit diagram of a conventional control panel, Figure 2 is a circuit diagram of another conventional control panel, and Figure 3 is a circuit diagram of a conventional control panel.
FIG. 4 is a circuit diagram of a second embodiment of the present invention. ...control section, ...operation display section, k ...external contact, EL ₃ ...first dedicated crossover wire, EL ₁ ...second
Dedicated crossover wire, EL ₂ ...Third dedicated crossover wire, T ₁ ...
... common terminal, T ₂ ... first switching terminal, T ₃ ... second switching terminal, AR ... automatic alternating movement relay circuit, X ₁ ... first operation relay, X ₂ ... second switching terminal Operation relay, MC ₁ ...First electromagnetic contactor for load control, MC ₂ ...Second electromagnetic contactor for load control, Z ₁
...First reception relay, Z ₂ ...Second reception relay, RL ₁ ...Operation indicator lamp (first indicator,
GL ₁ ...Stop indicator lamp (first indicator), RL ₂
...Operation indicator lamp (second indicator), GL ₂ ...
Stop indicator lamp (second indicator).

Claims (1)

[Claims] 1. The connection state between the common terminal T ₁ and the first and second switching terminals T ₂ and T _{3 is changed every time an external signal is input from the control unit through the first dedicated crossover line EL 3 .} The common terminal is switched alternately when the external signal is input.
The automatic alternating operation relay circuit AR of the operation display unit to which a voltage is applied to T1, and the first switch of the control unit to which one side half-wave current is applied from the first _switching terminal _T2 through the second exclusive crossover wire _EL1 . operation relay X ₁ and the second
The second operation relay of the control unit is energized on one side in a half-wave from the switching terminal T ₃ through the third dedicated crossover wire EL ₂ .
X ₂ , a first load control electromagnetic contactor MC ₁ of the control section responsive to the first operation relay X ₁ , and a second load control of the control section responsive to the second operation relay X ₂ . a first load LD ₁ driven by the first load control electromagnetic contactor MC ₁ , and a first load control electromagnetic contactor MC ₂ driven by the second load control electromagnetic contactor MC _2. a second load LD ₂ ,
a first reception relay Z ₁ of the operation display unit that is energized at the other side half-wave through the second dedicated crossover wire EL ₁ when the first load control electromagnetic contactor MC ₁ is activated;
a second reception relay Z ₂ of the operation display unit, which is energized in half-wave on the other side through the third dedicated crossover wire EL ₂ when the second load control electromagnetic contactor MC ₂ is activated;
A control panel comprising first and second indicators RL ₁ , GL ₁ ; RL ₂ , GL ₂ of an operation display section responsive to the first and second receiving relays Z ₁ , Z ₂ , respectively. 2. The control panel according to claim 1, wherein the external signal is a liquid level detection signal corresponding to the height of the liquid level. 3 The first and second load control electromagnetic contactors
When the first and second loads LD ₁ , _{LD 2} controlled by MC 1 , MC ₂ fail, the failed load LD ₁ or LD of said first and second receiving relays Z ₁ , Z _{2 2.} The control panel according to claim 1, wherein the control panel is intermittently energized through the corresponding one of the second and third dedicated connecting wires EL ₁ and EL ₂ . 4 From the control unit to the first dedicated crossover FL ₃
The external signal sent through is a one-sided half-wave signal,
2. The control panel according to claim 1, wherein the first dedicated crossover line _EL3 is configured to pass a half-wave signal on the other side.