JPS6124792B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] This invention connects a parent device and a terminal device with a multiplex transmission line separate from a power line, and transmits signals between the parent device and the terminal device via this multiplex transmission line. The present invention relates to a remote control device for lighting equipment configured to control the driving of lighting equipment connected to a terminal device by sending and receiving information.

[Background technology]

As shown in FIG. 2, the conventional remote control device for lighting equipment connects a parent device 3 and a terminal device 4 with two multiplex transmission lines 2 separate from the power line 1, and connects the multiplex transmission line 2 with the terminal device 4. By transmitting and receiving a series of signals including an address signal, a control signal, and a return signal consisting of positive and negative pulse signals between the master unit 3 and the terminal device 4, the lighting equipment 5 connected to each terminal device 4 is controlled. It is configured to perform drive control.

Such traditional lighting equipment remote control devices are
When there is a short circuit or disconnection in the multiplex transmission line 2 for remote control, the lighting fixture 5 will go out, and the remote control will become impossible, making it impossible to turn on the light, which poses a safety problem. It was hot.

To solve this problem, the emergency lighting device disclosed in Japanese Utility Model Application Publication No. 52-157278 supplies power to the operation relay through the connection lead, and the operation relay is disabled when the connection lead is short-circuited or opened. The structure is configured to turn on the illumination lamp by utilizing the excitation, and to ensure safety by turning on the illumination lamp in the event of a short circuit or disconnection between the connecting leads.

In this way, the operation relay is constantly energized,
In a configuration that uses the fact that the operation relay becomes de-energized when the connection leads are short-circuited or disconnected to ensure safety by lighting the lighting lamp, the operation relay requires a considerable amount of energy to keep the operation relay energized at all times. It is necessary to pass a current of

If this type of short-circuit or disconnection detection configuration using constant excitation is applied to remote control of lighting equipment connected to multiple terminal devices through multiplex transmission, it would be necessary to install one for each terminal device. Excitation current must be passed through all of the relays connected to the terminal, and as the number of terminal devices increases, the output current capacity of the parent device must be increased. In other words, it is not possible to constantly excite the relays installed in multiple terminal devices with the current output from the main device, which has a small output current capacity that is enough to send signals.
With the constant excitation method, it is difficult to ensure safety in devices that perform multiplex transmission.

[Purpose of the invention]

The object of the present invention is to ensure that when a short circuit or disconnection occurs in a multiplex transmission line, the lighting equipment is always turned on to ensure safety, regardless of whether the previous state was on or off. To provide a remote control device for a lighting device that can easily ensure safety without increasing the output current capacity of a parent device.

[Disclosure of the invention]

The remote control device for lighting equipment of the present invention connects a parent device and a plurality of terminal devices via multiple transmission lines, and transmits and receives signals between the parent device and the plurality of terminal devices to respectively control the plurality of terminal devices. In a lighting equipment remote control device that individually remotely controls connected lighting equipment, the terminal device operates with a relay contact inserted in a power supply circuit of the lighting equipment and a first signal to control the relay contact. A latching relay having an on winding that turns on and an off winding that turns off the relay contact by being operated by a second signal, and a latching relay that is connected to a multiplex transmission line for the two types of signals to short-circuit or short-circuit the multiplex transmission line. a detection unit that detects a non-energized state of the multiplex transmission line due to disconnection; a charging capacitor connected to the multiplex transmission line so as to be charged in the non-detection state of the detector; and a detection operation of the detection unit. The present invention is characterized by comprising a safety circuit that outputs the discharge current of the capacitor only to the on-winding as an operation signal for the on-winding based on the on-winding.

According to the configuration of the present invention, the latching relay is used to switch the lighting equipment on and off, and the capacitor is charged when the multiplex transmission line is normal.
When a multiplex transmission line is short-circuited or disconnected, the capacitor charge is discharged through the on-winding of the latching relay, thereby forcibly switching the relay contact of the latching relay to the on-side.
When a short circuit or disconnection occurs in the multiplex transmission line for remote control, the lighting equipment can be reliably turned on and used, regardless of whether it was previously on or off. Above is very safe.

Also, there is no need to constantly excite the relay,
It is only necessary to charge the capacitor, and the output current capacity of the parent device only needs to be small regardless of how many terminal devices there are. In other words, even when transmitting and receiving signals between multiple terminal devices using a master device with a small output current capacity, it is possible to ensure safety by ensuring that the lighting equipment lights up in the event of a short circuit or disconnection of the multiplex transmission line. It's easy.

Moreover, the configuration is such that when the multiplex transmission line is de-energized, the pre-charged capacitor is discharged through the on winding of the latching relay to switch the latching relay to the on side. It is possible to ensure safety by lighting the lighting equipment without requiring a special line for lighting the lighting equipment in the event of a short circuit or disconnection.

Embodiment An embodiment of the present invention is shown in the drawings. This remote control device for lighting equipment connects the primary side of a photocoupler to the next stage of the rectifying bridge 7 of the input section 6' of the terminal device, which exchanges signals with a parent device (not shown) via the multiplex transmission line 2. A photodiode 8 forming the structure is connected. The secondary side of the photocoupler is connected to the output section 9' of a terminal device that is directly connected to the lighting equipment L to be controlled, and is connected to a power source via the power line 1 by its switching operation to control the power supply to the lighting equipment L. The phototransistors 10 forming the structure are connected, and this photocoupler is used as a detection unit that detects a non-energized state of the multiplex transmission line 2 due to a short circuit or disconnection of the multiplex transmission line 2.

A latching relay 21 is connected to the output section 9' of the terminal device.
an on-winding 21a of a latching relay 21 which is connected to the input section 6' and responds to the output of the logic circuit 17 of the input section 6';
Relay contact 1 that connects and disconnects the energized path of the lighting fixture L to be controlled by alternate operation of the off winding 21b
4'. That is, the logic circuit 17 is configured to be switched between a state in which it outputs to both of its two output terminals a and b and a state in which it outputs only to one output terminal b, depending on the signal from the multiplex transmission line 2. There is. One end of the on-winding 21a is connected to the collector of the transistor 25, its base is connected to the output terminal a, and its emitter is connected to the collector of the transistor 24 and the emitter of the transistor 26. The base of the transistor 24 is connected to the output terminal b, and its emitter is connected to the negative terminal of the logic circuit 17. Turn off the collector of transistor 26 winding 21
b and its base to transistor 2.
It is connected to the collector of transistor 23 as well as to the collector of transistor 23. transistor 2
3 is connected to the collector of the phototransistor 10, the emitters of both transistors 23 and 10 are connected to the negative terminal of the rectifying bridge 7, and the collector of the phototransistor and the on-winding 21a,
One end of the off winding 21b is connected to the positive terminal of the rectifying bridge 7, and a charging/discharging capacitor 22 is connected between the collector and emitter of the phototransistor 10.

A safety circuit that receives a detection signal from a de-energized state detection section of the multiplex transmission line 2 and operates the relay contact 14' to obtain a predetermined safe side, that is, a lighting state of the lighting fixture L, mainly uses transistors 23 to 26. It is composed of circuits that are included as elements.

Next, the operation will be explained. When the multiplex transmission line 2 is normal with no short circuit or disconnection, current flows through the photodiode 8, and the phototransistor 10 forming the switch drive control section at the output section 9'.
In order to turn on the transistor 23, the transistor 23 is turned off, and the on winding 21a and the off winding 21b of the latching relay 21 appear at the two output terminals a and b of the logic circuit 17 in response to the signal from the multiplex transmission line 2. Alternately energized by the output. That is, when outputs are applied to both output terminals a and b, transistors 24 and 25 are turned on, and on-winding 21a of latching relay 21 is excited. When an output is given only to output terminal b, the transistor 25 is turned off.
Transistor 24 turns on, which turns on transistor 26, and energizes off winding 21b of latching relay 21. On winding 21 like this
a. By selectively excitation of the off winding 21b, the relay contact 14' which connects and disconnects the current-carrying path of the lighting fixture L is controlled to be turned on and off.

Now, suppose that the relay contact 14' is in the OFF state, and at this time, if the power supply to the terminal device is stopped due to a short circuit or disconnection of the multiplex transmission line 2, no current will flow to the photodiode 8 of the input section 6'. , phototransistor 1 of output section 9'
0 is turned off, the discharge current of the capacitor 22 flows to the base of the transistor 23 for a short time after a short circuit or disconnection occurs, and the transistor 23 is turned on. Therefore, during this time, the discharge current of the capacitor 22 flows through the on winding 21a of the latching relay 21 and is excited, thereby reversing the relay contact 14' from the off state before the short circuit or disconnection occurs to the on state.

Therefore, in cases where it is dangerous that the lighting equipment L to be controlled is permanently fixed in the off state due to a short circuit or disconnection of the multiplex transmission line 2, this device It is possible to always lead the lighting fixture L to the safe side, that is, to the lighting state. Note that, not only in the case of a short circuit or disconnection of the multiplex transmission line 2, but also in the case where the rectifier capacitor 19 along with the rectifier bridge 7 breaks down, the photocoupler can detect this and guide the lighting fixture L to the lighting state. .

Further, although an inspection is performed before shipping, stopping the power supply at the end of the inspection is the same as disconnection, and as a result, the relay contact 14' of the latching relay 21 is turned on in the same manner as described above. In other words, the relay contact 14' remains on continuously from shipping to installation. Therefore, even during temporary power transmission during construction, simply connecting the lighting equipment to the power source will ensure that it will turn on, and there is no need to check the status of the relay contacts each time.

Here, the operation of the latching relay 21 will be explained. This latching relay 21 is configured such that when the switch 14' is off, the on winding 21a is energized from the capacitor 22, and the switch 14' is turned off.
4' is switched on, after which capacitor 22
Even if the switch 1 is completely discharged and current no longer flows through the ON winding 21a, the latching function
4' is maintained in the on state. Conversely, when the off winding 21b is energized while the switch 14' is on, the switch 14' operates in the same manner as described above.
4' is turned off, after which the switch 14' remains in the off state. Further, if the on winding 21a is energized when the switch 14' is on, or when the off winding 21a is energized when the switch 14' is off,
When the switch 14' is energized, the state of the switch 14' does not change.

〔Effect of the invention〕

According to the remote control device for lighting equipment of this invention,
A latching relay is used to switch the blinking of lighting equipment, and a capacitor is charged when the multiplex transmission line is normal, and when the multiplex transmission line is short-circuited or disconnected, the charge in the capacitor is released through the ON winding of the latching relay. Because the relay contact of the latching relay is forcibly switched to the on side, when there is a short circuit or disconnection in the multiplex transmission line for remote control, regardless of whether it was previously lit or off. Regardless of the situation, the lighting equipment can be turned on without fail, and it is extremely safe to use.

Also, there is no need to constantly excite the relay,
It is only necessary to charge the capacitor, and the output current capacity of the parent device only needs to be small regardless of how many terminal devices there are. In other words, even when transmitting and receiving signals between multiple terminal devices using a master device with a small output current capacity, it is possible to ensure safety by ensuring that the lighting equipment lights up in the event of a short circuit or disconnection of the multiplex transmission line. It's easy.

Moreover, the configuration is such that when the multiplex transmission line is de-energized, the pre-charged capacitor is discharged through the on winding of the latching relay to switch the latching relay to the on side. To ensure safety by lighting a lighting device without requiring a special line for lighting the lighting device in the event of a short circuit or disconnection.

In addition, since the relay contacts are always kept on before construction begins, just by connecting the lighting equipment to the power source during temporary power transmission before construction, it will always turn on, eliminating the hassle of switch-on operations that were previously required. Ru.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of a main part of an embodiment of the present invention, and FIG. 2 is a circuit diagram of a conventional example. 2...Multiple transmission line, 8...Photodiode, 1
0... Photo transistor, 8, 10... Photo coupler (non-energized state detection unit), 21... Latching relay, 21a... On winding, 21b... Off winding, 22
...Capacitor, L...Lighting equipment.

Claims (1)

[Scope of Claims] 1. A lighting device in which a parent device and a plurality of terminal devices are connected through a multiplex transmission line, and each of the devices is connected to the plurality of terminal devices by transmitting and receiving signals between the parent device and the plurality of terminal devices. In a remote control device for a lighting fixture that remotely controls each fixture individually, the terminal device connects a relay contact inserted into a power supply circuit of the lighting fixture, and an on-winding circuit that operates in response to a first signal to turn on the relay contact. a latching relay having an off winding operated by a wire and a second signal to turn off the relay contact; a detection unit that detects a non-energized state of the multiplex transmission line; a charging capacitor connected to the multiplex transmission line so as to be charged in the non-detection state of the detection unit; 1. A remote control device for a lighting device, comprising: a safety circuit that outputs a discharge current of a capacitor only to the on-winding as an operation signal for the on-winding.