JPH0535373A - Remote automatic power unit - Google Patents

Abstract

PURPOSE:To simplify a circuit and to guarantee operations in the case of operating a system again by providing a reception part to receive waveform signals, delay part to generate signals for driving a relay for a fixed time and relay part to supply power supply voltages. CONSTITUTION:When supplying power under remote control, a switch 6 is changed over to a remote side. When the waveform signals are inputted from IN 1 and 2 to a reception part 1 in such a state, the waveform signals are converted to pulse signals by the reception part 1 and outputted to a delay part 2. Each time the input signal is changed from L to H, at a one-shot TTL, the output signal H is held for fixed time and outputted to a switch part 3 and an AND circuit 4 and when a contact is not grounded, the switch part 3 outputs the output signal H to the AND circuit 4. Thus, the output of the AND circuit 4 is turned to H and inputted to a relay part 5, a relay contact 51 is closed, the switch part 6 is switched to the remote side and therefore, the power supply voltage is supplied to each terminal equipment 9.

Description

Detailed Description of the Invention

[0001]

[Industrial application] A plurality of terminal devices share one transmission line, one of which is connected to a center unit, and are connected to the transmission line in an information system that is data-linked with the center unit by a time division method. The present invention relates to a remote automatic power supply device that supplies a power supply voltage to each terminal device according to a transmitted waveform signal.

[0002]

2. Description of the Related Art Conventionally, a device having the same effect as this device is directly connected to a power source section of a center machine by a power cable for driving a relay, and each terminal device has the same effect as this device. It had a built-in device having the above, and was operated by a certain specific control signal transmitted from the center machine. In addition, when the relay is being driven, when the driving is once released or re-driven, the relay is physically disconnected from the transmission line or the base power switch of the terminal device is switched.

[0003]

In the above information system, in many cases, since each terminal device is installed in a place near the user far from the center machine, it is directly connected to the center machine by a power cable. In the case of the method, wiring had to be done at each installation location. Next, in the case where it is built into each terminal device, OA is progressing, and there are many other electric devices that work in conjunction with the information system for business purposes. The electric circuit was complicated and expensive because it operated with a uniform and specific control signal from the machine. In many cases, the work by the information system is resumed at the same time when the operation of the center machine is started, and at the end, the user individually disconnects each terminal device, so that the physical transmission line is cut off or the terminal power source of the terminal device is used. The switch switching method has the drawback that remote control is not guaranteed when the center machine is restarted. An object of the present invention is to solve the above-mentioned conventional drawbacks, and connect one to any part of a transmission line connected to a center machine, and the power supply voltage supplied is versatile and is a time division system. Has a function that simplifies the circuit by periodically transmitting signals from the center machine and guarantees remote control when the center machine restarts even if the relay drive is artificially canceled. The purpose is to

[0004]

[Means for Solving the Problems] In an information system in which a plurality of terminal devices share one transmission line, one of which is connected to a center unit, and are data-linked with the center unit by a time division method, the transmission lines are connected to the center unit. A receiver connected to receive the waveform signal transmitted through the transmission line, a delay unit that generates a signal for driving the relay for a certain period of time each time one waveform signal is generated, and a relay drive signal to drive the relay to drive the power supply voltage. Consists of a relay unit that supplies the power and a switch unit that electrically cancels or reactivates the drive while the relay is in operation.The relay is driven as long as the waveform signal transmitted through the transmission line is received within a certain period of time. If the power supply voltage is supplied and the next waveform signal is not generated within a certain time after the last waveform signal is generated, the switch unit is reset, the relay drive is released, and the power supply voltage is stopped. And it has a function that.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings. FIG. 1 is an example of a block diagram showing the internal configuration of the present apparatus, in which (IN1) and (IN2) are connected to a transmission line, and (1) is input terminals (10a) and (10).
b), an output terminal (19a) and a GND ground (19b), and a detailed circuit example thereof is a receiving unit shown in FIG.
(2) has an input terminal (20) and an output terminal (25),
The detailed circuit example is the delay unit shown in FIG. (3) is an input terminal (31), an output terminal (33), a GND ground (3
4), and a detailed circuit example thereof is a switch unit shown in FIG. (4) is an AND circuit, (5) is a relay section,
(6) is a switch section for switching whether the power supply voltage of the apparatus is controlled by remote control or in a local state,
(7) is an AC / DC converter, (8) is a power outlet, and (9) is each terminal device or other electric equipment.
In the receiving unit (1) shown in FIG. 2, (11) is a pulse transformer, (12) is a diode, (13) is a zener diode, (I4) is an electrolytic capacitor, and (15) and (16).
(17) is a resistor, (18) is an OP amplifier, (1
The waveform signals input from 0a) and (10b) are transformed at (11) and half pole removed at (12), and then the filter (1
4) Through (15), it is amplified in (18) according to the ratio of the resistance values of (16) and (17). In the delay unit (2) shown in FIG. 3, (21) is an electrolytic capacitor and (2
2) is a diode, (23) is a resistor, (24) is a one-shot TTL, and the capacitance of (21) and (2)
The output signal is held for a certain period of time set by the magnitude of the resistance value of 3). In the switch section (3) shown in FIG. 4, (35) is a JK flip-flop and (30) is a CL.
Is a contact that grounds to GND, and is valid when the signal input from the input terminal (31) is L, and the JK flip-flop (35) is reset, and when H, the contact (30) is artificially grounded to GND. The output signal is toggled each time.
Next, the operation of the remote automatic power supply device having the above configuration will be described. When the device supplies the power supply voltage by remote control, the switch unit (6) is switched to the remote side. In this state, when the waveform signal is input from (IN1) (IN2) to the receiving unit (1), the receiving unit (1) converts the waveform signal into a pulse signal and outputs it to the delay unit (2). In the one-shot TTL (24), each time the input signal changes from L to H, the output signal H is held for a certain period of time and the switch unit (3)
To the AND circuit (4), and if the contact (30) is not grounded here, the switch section (3) ANDs the output signal H.
Output to circuit (4). As a result, the output of the AND circuit (4) becomes H and is input to the relay section, and the relay contact (5
Since 1) is closed and the switch section (6) is switched to the remote side, the power supply voltage is supplied to each terminal device (9).

[0006]

As described above, according to the remote automatic power supply device of the present invention, it is connected to any portion of the transmission line and is unique to each terminal device or other electric equipment that works with the business information system. By supplying the power supply voltage to the power supply and setting the delay time in the delay unit inside this device to be larger than the regular signal interval from the center machine, the circuit is simplified because the relay is always driven while the center machine is operating. In addition, the electrical switching method has the effect of guaranteeing operation when the system is restarted.

[Brief description of drawings]

FIG. 1 is a block diagram showing an internal configuration of the present apparatus.

FIG. 2 is a circuit example of a receiving unit.

FIG. 3 is a circuit example of a delay unit.

FIG. 4 is a circuit example of a switch unit.

[Explanation of symbols]

1 receiver 2 delay section 3 switch part 4 AND circuit 5 Relay section 6 switch part 7 AC / DC converter 8 power outlets

Claims (2)

[Claims] 1. A receiving unit, one of which is connected to a transmission line connected to a center unit, for receiving a waveform signal transmitted through the transmission line, and a signal for driving a relay for a certain period of time for each generation of one waveform signal. A remote automatic power supply device that includes a delay unit that generates a power supply and a relay unit that is driven by a relay drive signal to supply a power supply voltage. 2. The remote automatic power supply device according to claim 1, further comprising a switch section for electrically releasing or re-driving the relay while the relay is being driven.