JPH0428199B2 - - Google Patents

Description

Detailed Description of the Invention [Technical Field] The present invention relates to a remote control system that connects a central control device and a plurality of monitoring and control terminals through a pair of traffic lights and transmits monitoring data and control data by time division multiplexing. The present invention relates to a terminal device of a supervisory control device.

[Background Art] Conventionally, this type of remote monitoring and control device connects a central control device and a plurality of monitoring and control terminals each having a unique address via a pair of signal lines, and transmits signals from the central control device. Each terminal is appropriately accessed to receive the monitoring data sent back from each monitoring terminal, and control data for controlling the load based on the monitoring data is transmitted to each control terminal. By the way, the control terminal used in such remote monitoring and control equipment has a built-in relay for load control, so there is a problem that it is large, and it is difficult to install a large number of control terminals in parallel. In this case, since each terminal is provided in isolation, there is a problem in that it is not easy to conduct wiring when connecting the terminals to each other.

[Object of the Invention] The present invention has been provided in view of the above-mentioned points, and has an object to miniaturize a control terminal device and to facilitate transmission wiring when control terminal devices are installed in parallel. The present invention provides a terminal device for a remote monitoring and control device.

[Disclosure of the Invention] (Structure) The present invention connects a central control device and a plurality of monitoring and control terminal devices each having a unique address through a pair of signal lines, and connects a central control device to each terminal device by a pair of signal lines. In a remote monitoring and control device that time-division multiplex transmits monitoring data of a load control operation switch and control data of a load control relay based on the monitoring data by accessing the Signal and power supply terminal boards are arranged side by side across substantially the entire length in the direction, with a terminal board provided at one end of the terminal board with a terminal screw for connecting to the power supply of the signal line and load control relay, This is characterized in that a lead wire connected to a load control relay is led out from a control terminal.

(Example) First, the entire remote monitoring and control device of the present invention will be described based on FIGS. 3 to 12. Third
The figure shows a schematic configuration of an embodiment of the present invention, and FIG. 4 shows a more simplified schematic configuration diagram, which includes a central control unit 1 and a plurality of monitoring terminals to which unique addresses are set. 2 and a control terminal 3 are connected by a pair of signal lines 4. The transmission signal Vs sent from the central control device 1 to the signal line 4 is
As shown in FIG. 9a, a start pulse signal ST indicating the start of signal transmission, a mode data signal MD indicating the signal mode, an address data signal AD for calling the terminals 2 and 3, a control data signal CD for controlling the load 7, It is a bipolar (±24V) time division multiplexed signal consisting of a checksum data signal CS and a return standby signal WT that sets the return signal period from terminals 2 and 3, and data is transmitted by pulse width modulation. It's becoming like that. In each terminal device 2, 3, when the address data of the transmission signal Vs received via the signal line 4 matches its own unique address data, it takes in the control data of the transmission signal Vs, and returns the transmission signal Vs. The monitoring data signal is connected to the current mode signal (signal line 4) in synchronization with the standby signal WT.
The signal is sent back by short-circuiting between the two via an appropriate low impedance.

In addition, the central controller 1 also has a dummy transmission signal.
A dummy signal transmitting means for constantly transmitting Vs, and when an interrupt signal Vi as shown in FIG. The monitoring terminal 2 is provided with an interrupt processing means that accesses the terminal 2 and sends back the monitoring data.On the other hand, when the monitoring terminal 2 receives a monitoring input, the monitoring terminal 2 receives an interrupt processing means that synchronizes with the start pulse signal ST of the dummy transmission signal Vs. interrupt signal
At the same time as generating Vi, a return standby signal for the address confirmation mode transmission signal Vs from the central controller 1
An interrupt generating means that returns its own unique address data in synchronization with the WT, and returns monitoring data corresponding to the monitoring input when the interrupt access mode transmission signal Vs in response to the interrupt is transmitted from the central control unit 1. A data return means is provided to create control data to be transmitted to the control terminal 3 based on the monitoring data sent back from the monitoring terminal 2 to the central control device 1.

The monitoring terminal 2 also includes an individual operation switch 5a that individually controls loads 7 such as lighting, an individual operation selector switch 5b that individually controls multiple loads 7, and an individual operation selector switch 5b that individually controls multiple loads 7. pattern switch 5c, incandescent lamp,
A dimmer switch 5d dims the lighting load 7 such as a fluorescent lamp, and the lighting load 7 is temporarily (30 seconds or
Monitoring input means such as a temporary lighting switch 5e that lights up at 300sec), a delay switch 5f that delays the timing of turning off the lighting load 7 by a certain period of time (30sec or 300sec), and a pattern input switch 5g are connected, and the pattern input switch 5g is connected to a timer. Setting unit 5h, calendar time switch 5i, indoor EE switch 5j, daylight sensor 5
Sequence control data such as k output is selectively input (in a preset pattern). Booster 1 inserted into signal line 4
0 guarantees attenuation of the transmission signal Vs.
Further, the interlocking switch terminal 3' connected to the terminal end of the signal line 4 controls the connection with the signal line 4' of other remote monitoring and control equipment with the same specifications, and the connection from the central control unit 1. Whether or not to connect both signal lines 4 and 4' is selected by the command transmission signal Vs, and if both signal lines 4 and 4' are connected, the system scale will increase and the center The terminal devices 2 and 3 connected to both signal lines 4 and 4' can be monitored and controlled from the control device 1, and, for example, a wide range of pattern control can be performed across both remote monitoring and control devices.

The remote control switch 8 is configured to output a control output equivalent to the control output of the control terminal 3, and both control outputs are used to connect remote control relays 6a ₁ , 6a ₂ , ... 6b ₁ , 6a for load control. ₂ , . . . and the load 7 is controlled in parallel. In the figure, 27 is a transformer that supplies power to the control terminal 3 and the remote control relays 6a ₁ , 6a ₂ , . . . 6b ₁ , _{6a 2} ; ₂ , . . . 6b ₁ and 6a ₂ are arranged within the distribution board 29. In addition, the monitoring terminal 2
A wireless transmitter/receiver may be used to transmit signals between the monitor input means and the monitoring input means, and the pattern switch 5c may be provided with an all-on or all-off switch that turns on or off all the loads 7 at once. Figure 12 shows a schematic configuration diagram of this remote monitoring and control device installed in a building.In the control room, there is a distribution board with built-in selector switch 5b and central control device 1 for comprehensive load control. Furthermore, a pattern switch 5c, a selector switch 5b, a daylight sensor 5k, a disaster prevention sensor 5k', a disaster prevention sensor 5k'', etc. are arranged on each floor via the signal line 4. , the selector switch 5b allows centralized control and operation at other locations.

FIG. 5 is a circuit diagram of a specific configuration example of the central control device 1. The central control device 1 includes a signal processing circuit 13 consisting of a CPU, a transmission signal generation section 14, a received signal discrimination circuit 15, and a signal transmission circuit. 16a and a signal receiving circuit 16b, and a power supply circuit 17, the dummy signal transmitting means and the interrupt processing means are connected to the signal processing circuit 13.
It has been realized in Further, the signal transmitting circuit 16a of the transmitting/receiving circuit 16 is formed of a photocoupler _PC1 , transistors _Q0 to _Q4 , operational amplifiers _OP1 , _OP2, and three-terminal regulators _VR2 , _VR3 ,
A bipolar transmission signal Vs is generated by turning on transistors Q ₁ and Q ₄ or Q ₂ and Q ₃ in accordance with “H” and “L” of the pulse width modulated data signal outputted from the transmission signal generator 14. The voltage is made constant by the three-terminal regulators VR ₂ and VR ₃ and sent to the signal line 4.

On the other hand, the signal receiving circuit 16b includes a photocoupler
PC ₂ , operational amplifier OP ₃ , OP ₄ , diode D ₁ ~
D ₃ , a Zener diode ZD ₁ and a light emitting diode LD ₁ , and a current mode return signal sent back from the terminals 2 and 3 through the signal line 4 as a current mode signal is connected to a current detection resistor R ₁ and a Zener diode. A return signal detection circuit consisting of a diode ZD ₁ and an operational amplifier OP ₃ detects the signal.
In other words, the current detection resistor R ₁ through which the signal current flows
When the voltage across the terminal exceeds the reference voltage set by the Zener diode ZD ₁ plus the voltage of the resistor R ₁ due to the average signal current (signal lines 4 are short-circuited through an appropriate impedance and compared) When a large current (> average current + predetermined value) flows, the output of the operational amplifier OP ₃ becomes “L”, the operation display light emitting diode LD ₁ and the light emitting diode of the photocoupler PC ₂ are lit, and a return signal is received. This is indicated by lighting the operation display light emitting diode LD ₁ , and the received signal is transmitted to the photocoupler.
PC ₂ phototransistor and transistor Q ₅
The signal is inputted to the received signal discriminating circuit 15 via. The divided voltage obtained by dividing the reference voltage set by the Zener diode ZD ₁ by the resistors R ₂ and R ₃ , and the current detection resistor input through the noise removal circuit consisting of the resistor R ₄ and the capacitor C ₁ .
A short-circuit detection circuit for the signal line 4 is formed by an operational amplifier OP ₄ and a diode D ₂ that compare the voltage across R ₁ , and when the signal line 4 is short-circuited and a large short-circuit current flows, the current detection resistor R ₁ When the voltage across both ends exceeds the divided voltage, the output of the operational amplifier OP ₄ becomes "L" and lights up the operation display light emitting diode LD ₁ and the light emitting diode of the photocoupler PC ₂ via the reverse current blocking diode D ₃ . , the continuous lighting of the operation display light emitting diode LD ₁ indicates that the signal line 4 is short-circuited.

The power supply circuit 17 also includes a diode bridge.
It is formed by DB ₁ , DB ₂ and a 3-terminal regulator VR ₁ , and it rectifies and smoothes the signal power supply AC ₁ to supply power to the transmitting/receiving circuit 16, and also serves as a control power supply.
AC ₂ is rectified and smoothed to make it a constant voltage, and the signal processing circuit 1
3. Transmission signal generation circuit 14 and reception discrimination circuit 1
It is designed to supply power to 5.

Figure 6a shows the transmission signal Vs from the central controller 1.
2 is a circuit diagram showing a specific configuration example of a control terminal device 3 that receives a signal and controls a remote control relay 6, and the control terminal device 3 is a signal receiver that receives a transmission signal Vs transmitted via a signal line 4. A circuit 20, an address setting circuit 21 that sets a unique address, detects a match between the address data of the transmission signal Vs and the unique address, takes in control data when an address match is detected, forms a control output Vc, and outputs a monitoring input. a signal processing circuit 22 that forms return monitoring data based on the control output Vc, and a pulse conversion circuit 23 that forms the set pulse signal Vcs and reset pulse signal Vcr of the remote control relay 6 in accordance with "H" and "L" of the control output Vc. , a relay drive circuit 24 consisting of transistors Qa, Qb and photothyristors PSa, PSb, which form a drive signal for driving the remote control relay 6, and a monitoring input consisting of a photocoupler PC ₃ , which inputs monitoring information indicating the operating state of the remote control relay 6. Circuit 25 and return standby signal for transmission signal Vs
It is formed with a return circuit 26 that returns the monitoring data signal as a current mode signal to the central controller 1 during the return signal period set by the WT, and the control terminal 3 is Sometimes, the transmitted control data is captured and the load 7
It outputs a drive signal for the remote control relay 6 to turn on and off the remote control relay 6, and also sends back monitoring data indicating the operating state of the remote control relay 6 to the central control device 1.

In addition, to set the unique addresses of the monitoring terminal 2 and the control terminal 3, the lower 6 bits of the 8-bit address data are used as a user setting section that can be set as appropriate by the user, and the upper 2 bits are set as the terminal device. This is a manufacturer setting section that indicates the type of terminal 2,
By simply setting the user setting section of the unique address in No. 3 to the same value, both terminals 2 and 3 can be easily made to correspond, and based on the monitoring data returned from the monitoring terminal 2 set to the same value, Control terminal 3
The load 7 connected to can be controlled. For example, the 1st and 2nd bits of the address data of the monitoring terminal 2 are fixed as "0, 0", the 1st and 2nd bits of the address data of the control terminal 3 are fixed as "1, 0", and the 3rd... If the 8th bit can be set by the user, the monitoring terminal 2
are assigned channels 0 to 63, channels 128 to 191 are assigned to the control terminal 3, and when the 3rd to 8th bits are set to the same value, the correspondence is 1:1 (0 → 128 , 1→129,...
...63→191).

The configuration of the monitoring terminal 2 is almost the same as that of the control terminal 3 described above, and the difference is that when a monitoring input is received, an interrupt processing is performed to transmit an interrupt signal Vi and return monitoring data. The signal processing circuit 2 handles the interrupt generation means and data return means.
2, and as a matter of course, the pulse conversion circuit 23 and drive circuit 24 are omitted. Further, the signal processing circuit 22 can handle even if the signal input to the monitoring input terminal is a continuous signal or a pulse signal.

By the way, the remote control relay 6 that controls the on/off of the load 7 has a main contact ra and an auxiliary contact that are linked together.
rb, and current switching diodes Da and Db connected in series to the excitation coil L of the latching relay RR _. When a set current of a predetermined level flows through the excitation coil L for a predetermined time through Da, the main contact
ra is turned on and power is supplied to the load 7 from the commercial power supply AC, and the auxiliary contact rb is reversed and the excitation coil L is turned on.
The diode Db is switched and connected to the AC power source AC ₃ through the diode Db.
When a reset current flows from to the excitation coil L, the main contact ra is turned off and the power supply to the load 7 is stopped, and the auxiliary contact rb is reversed so that the diode Da is switched and connected to the excitation coil L. It's summery. Therefore, when the photothyristor PSa of the drive circuit 24 of the control terminal 3 is turned on, the latching relay RR of the remote control relay 6 is set to the on side, the load 7 is turned on, and the photothyristor PSb is turned on. When this happens, latching relay RR is reset to the OFF side and load 7 is turned off. In this case, since the remote control relay 6 is formed using a latching relay RR, it can also be controlled by a remote control switch 8' that generates signals equivalent to the set signal and reset signal output from the drive circuit 24. The load 7 is controlled by control data transmitted from the central control device 1 via the signal line 4 and the control terminal 3 and the control output of the remote control switch 8'. Although the figure shows only a control output for controlling one remote control relay 6, in the embodiment, control outputs for controlling four remote control relays 6, respectively, are output from the signal processing circuit.

FIG. 6b shows a specific circuit example of the remote control switch 8', including the push button switch SW ₀ and the diode.
A set/reset signal generation circuit consisting of Da', Db', a light-emitting diode LDa, LDb, and a diode Da", Db" connected in series, respectively.
It consists of an off display circuit. Note that the transistor Qa of the drive circuit 24 of the control terminal 3,
It goes without saying that the remote control switch 8' may be configured with a circuit provided with an on switch and an off switch in place of Qb.

7 and 8 show the central control device 1, the control terminal 3, the remote control relay 6a ₁ for load control,
6a ₂ , ... 6b ₁ , 6a ₂ ... 6c ₁ , 6c ₂ , ... (hereinafter abbreviated as remote control relay 6). The central control unit 1, remote control relay 6, and transformer 2 are standardized and modularized in the same way as the electromagnetic relays, breakers, transformers, etc.
1. Time-limited contact with timer circuit TC (no-voltage contact)
A monitoring terminal device 2' that uses as monitoring input and a control terminal device 3' that controls contact output are installed in two rows on the DIN rail 28 on which other wiring devices are installed. A control terminal 3 for controlling a remote control relay 6 is arranged in an empty space formed between the rows. In the figure, numerals 30 and 31 are switches for setting a unique address, and as mentioned above, the lower 6 bits of the 8-bit address data can be set freely by the user. In addition, 5m
are selector switch 5b' and pattern switch 5
The selector switch 5b' has an individual operation function for individually controlling the loads 7, and a pattern input function for inputting pattern control data in pattern control. , 5n is the pattern switch section 5
It is a pattern switch with a pattern setting switch section 5nb arranged side by side on the na side, LD ₃ a and LD ₃ b are light emitting diodes for on/off indication, N is a name plate,
SW is a push button switch. Further, the monitoring terminal 2 is built in the main circuit section (disposed on the back side of the front panel) of each switch 5m, 5n.

The operation of the embodiment will be specifically explained below using the flowcharts shown in FIGS. 10 and 11. Now, when the power is turned on to the central control device 1 and the monitoring control operation starts, the central control device 1 first accesses each control terminal device 3 in sequence and checks the load control status of each control terminal device 3. Then, the operation display of an operation display lamp (not shown) provided corresponding to each load 7 is made to match the operation state of the load 7. Next, the dummy signal transmitting means of the central control device 1 transmits the signals to the monitoring or control terminals 2 and 3.
A dummy transmission signal Vs that accesses a free address other than the unique address set in signal line 4
will be sent to. In this normal state where the dummy transmission signal Vs is constantly being transmitted, each terminal device 2, 3 cannot obtain an address match, so it enters a standby state without transmitting data with the central control device 1. It's summery. Here, when a monitoring input is input from the monitoring input means to any of the monitoring terminals 2, for example, an operation switch that turns on the load 7 is pressed, and an on-operation signal is sent to the monitoring input terminal of the monitoring terminal 2. is input, the interrupt generation means formed in the signal processing circuit 22 of the monitoring terminal 2 immediately generates an interrupt signal Vi, and outputs the signal line 4 in synchronization with the start pulse signal ST of the dummy transmission signal Vs. Send to. The interrupt processing means of the central control device 1 receives an interrupt signal from the monitoring terminal device 2.
In order to detect the interrupt generating terminal device 2 when Vi is received, a transmission signal Vs of an address confirmation mode is transmitted to access the interrupt generating terminal device 2 and return address data.

This address confirmation mode transmission signal Vs is received by the interrupt generation terminal 2, and the interrupt generation means of the interrupt generation terminal 2 generates its own unique signal in synchronization with the return standby signal WT of the address confirmation mode transmission signal Vs. Send address data back. Upon receiving the returned unique address data, the interrupt processing means of the central control unit 1 transmits an interrupt access mode transmission signal Vs to the specified interrupt terminal device 2. Next, when the interrupt access transmission signal Vs is received, the data return means of the interrupt generating terminal 2 returns the monitoring data corresponding to the monitoring input to the central controller 1 in synchronization with the return standby signal WT. do. The monitoring data sent back from the interrupt generation terminal 2 to the central control device 1 in this way is processed by the signal processing circuit 13 of the central control device 1, and control data for controlling the load 7 is created and handled. Control terminal 3
Sends out a transmission signal Vs to access. The control terminal 3 that has received this transmission signal Vs controls the remote control relay 6 based on the transmitted control data to turn on and off the load 7, and also transmits monitoring data indicating the control status of the load 7 to the central It is sent back to the control device 1. The central control device 1 controls the operation indicator lamp based on the monitoring data sent back from the control terminal 3 to update the operation status display of the load 7, completes a series of monitoring control operations, and transmits the dummy transmission signal Vs. Returns to the standby state where the data is constantly transmitted.

As described above, in the embodiment, the central control device 1 transmits a dummy transmission signal and is always in an interrupt standby state, and when the monitoring terminal 2 receives a monitoring input and an interrupt signal is sent. When the interrupt occurs, the terminal immediately responds and sends back the monitoring data, so even if the number of terminals 2 and 3 increases, responsiveness is always maintained regardless of the input timing of the monitoring input. It can be done well. Further, the control terminal 3 outputs a set signal or a reset signal for controlling the remote control relay 6 based on the control data, and the load 7 is controlled by the remote control relay 6.
By connecting the remote control switches 8, 8' to the control input terminals of the remote control relay 6, the load 7 can be controlled in parallel by the control output of the control terminal 4 and the control output of the remote control switches 8, 8'. 7's operability has been improved. Furthermore, the operation display light emitting diode LD ₁ provided in the transmitting/receiving circuit 16 displays the reception of the return signal (flashing) and the short circuit of the signal line 4 (continuous lighting).
Since the receiving state display and the short circuit display are performed by the same operation display light emitting terminal, the structure is simplified and the cost can be reduced. Furthermore, since the modular central control device 1 and remote control relay 6 are arranged in the distribution board 29, there is no need for a special installation space for the central control device 1, and the central control device The wiring of the signal line 4 between the central control device 1 and the control terminal device 3 can be done in the distribution board 29 in the same way as the wiring of the power line, making the installation easier. The terminal device 3 and the remote control relay 6 for load control are connected to the distribution board 29
Since the load 7 is located adjacent to the inside, it is easy to check whether the load 7 is being controlled normally, and construction and maintenance are facilitated.

Next, the gist of the present invention will be explained based on FIGS. 1 and 2. FIG. 1 shows an exploded perspective view of the control terminal 3, showing the body 51, printed board block 53, and cover 52.
It consists of three parts, and a printed board block 53 is housed on the cover 52 side. The printed board block 53 is composed of two printed boards 53a and 53b, each having an electronic component mounted thereon. As described above, this printed board block 53 is placed on the cover 52 side and is fixed by ribs 58 that are erected from approximately the four corners of the body 51. An address setting circuit 21 is arranged on the upper printed board 53a, and an opening 63 for address setting is bored in a portion of the cover 52 located above the address setting circuit 21. Further, a cover 64 is arranged to cover this opening 63. Additionally, four lead wires 61 are led out from the four corners of the printed board 53a for connection to the power supply side of the remote control relay 6.
is inserted through an insertion hole 62 formed in the cover 52 and led out to be connected to the remote control relay 6 as shown in FIG. A claw piece 60 is integrally hung from both sides of the lower part of the cover 52, and the claw piece 60 is inserted into the square hole 5 formed in the body 51.
By inserting and locking into the body 51 and the cover 5
2 will be fitted and fixed.

Moreover, three conductive terminal plates 54, 55, and 56 are disposed on the upper surface of the cover 52 over the entire length in one direction with a partition wall 57 interposed therebetween. Terminal board 54, 5
A terminal screw 65 is provided at one end of 5, 56,
The partition wall 57 at the terminal screw 65 is formed high to ensure insulation. cover 6
The two terminal plates 54 and 55 on the fourth side are connected to the signal line 4, and the terminal plate 56 at the end is connected to the power line from the remote control transformer 27. Furthermore, the connection pieces 66 at the bottom of each terminal board 54, 55, 56 are vertically disposed downward as shown in FIG. 2b, and each connection piece 66 is configured to be directly soldered to the printed board 53a. . This control terminal device 3 is designed to control four remote control relays 6, and as mentioned above, four lead wires 61 are led out, and two remote control relays 6 are connected to each side of the control terminal device 3. It is set up.

Further, in this embodiment, as shown in FIGS. 7 and 8, three control terminals 3 are arranged vertically in a row, and corresponding remote control relays 6 are arranged on both sides of the control terminals 3, respectively. Terminal boards 54, 5 of each control terminal 3
5 and 56 are connected by screwing a terminal screw 65 using a plate-shaped conductive bar 67, as shown in FIG. In such a case, each terminal board 5
Since the positions of 4, 55, and 56 correspond to the vertical direction, feeding wiring can be easily performed by simply arranging the bar 67 in the vertical direction. As shown in FIGS. 6 and 7, the wiring of each member is as shown in FIG.
are connected to the remote control relay 6, respectively. Also,
One pole of the remote control relay 6 is commonly connected. In this way, one control terminal 3 drives four remote control relays 6 (simultaneous driving is also possible), so for example, if 64 control terminals 3 are used,
Since addresses can be set from 0 to 63 channels, it is possible to control up to 256 circuits.

[Effects of the Invention] As described above, the present invention connects a central control device and a plurality of monitoring and control terminals to which unique addresses are set, through a pair of signal lines, and connects the central control device to each terminal. In the remote monitoring and control device, which accesses the terminal as appropriate to time-division multiplex transmit the monitoring data of the load control operation switch and the control data of the load control relay based on the monitoring data, Signal and power supply terminal boards are arranged side by side across the bulkhead over approximately the entire length in one direction, and a terminal screw is provided at one end of the terminal board for connection to the signal line and the power supply of the load control relay. ,
Since the lead wires connected to the load control relays are derived from the control terminals, by arranging the control terminals side by side in the longitudinal direction of the terminal board, the signal and power supply wiring can be routed as is. It is sufficient to connect the terminals located at the same position, and the effect can be achieved very easily. In addition, by leading out the lead wire for controlling the load control relay, the product does not have a built-in relay as in the past, which has the effect of making the product more compact. be.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of a control terminal according to an embodiment of the present invention, FIGS. 2a and 2b are a plan view and a side view of the same, and FIG. 3 is a schematic configuration of the remote monitoring and control device of the same. Figure 4 is a schematic block diagram of the main parts of the same as above, Figure 5 is a block diagram of the central control unit of the same as above, and Figures 6 a and b are circuit diagrams of the main parts of the control terminal and remote control switch as above. , FIG. 7 is a top view of the main parts of the above, FIG. 8 is a perspective view of the main parts of the same, FIGS. 9 to 11 are operation explanatory diagrams of the same, and FIG. 12 is a configuration diagram showing the wiring of the same. . 1 is a central control unit, 2 is a monitoring terminal, 3 is a control terminal, 4 is a signal line, 54, 55, 56 are terminal plates, 57 is a partition wall, 61 is a lead wire, and 65 is a terminal screw.

Claims (1)

[Claims] 1 Connect the central control unit and multiple monitoring and control terminals with unique addresses set using a pair of signal lines, and access each terminal from the central control unit as appropriate to control the load control operation switch. In a remote monitoring and control device that transmits monitoring data and control data for load control relays based on the monitoring data in a time-division multiplex manner, a signal and power source is provided over approximately the entire length in one direction on the top surface of the control terminal. Terminal boards for the terminals are arranged side by side through a partition wall, and a terminal screw is provided at one end of the terminal board for connecting to the power supply of the signal line and the load control relay, and the control terminal is connected to the load control relay. 1. A terminal device for a remote monitoring and control device, characterized in that it is formed by leading out a lead wire.