JPS59191631A - Sequential make/break device of power supply - Google Patents

Abstract

PURPOSE:To attain the sequence control for make and break of a power supply with plural devices by combining on-delay timers, off-delay timers and relays. CONSTITUTION:When a power supply switch is made, each contact of off-delay timers OFFT-1-3 is closed. Then an on-delay timer ONT-1 works for a prescribed period of time to close its contact. Thus a relay RL-1 works to close its contact, and therefore a power supply is supplied to a device 2. Then a timer ONT-2 works after a prescribed period of time, and a relay RL-2 works to apply a power supply to a device 3 in the same way. Then a power supply is applied to a device 4. When a switch SW is broken, the power supplies are sequentially broken at and after the device 4 by the functions of timers OFFT. In such a way, the sequence control is possible for make and break of a power supply with plural devices.

Description

DETAILED DESCRIPTION OF THE INVENTION (al. Technical Field of the Invention)
This invention relates to a cutting device.

(bl Prior Art and Problems) As is well known, in electronic computer systems, the processing unit < cp
u), main memory, input/output control device, and various input/output values W
(Ilo). By the way, in this system, when power supply to all devices is started all at once, a large inrush current flows and parts such as a breaker are destroyed, or an erroneous CPU instruction interrupt occurs, resulting in an I10 error. Furthermore, if the power is turned off all at once, there is a problem that the system ends abnormally and Ilo becomes operationally locked, preventing the next new operation, and an improvement is desired.

(e) Purpose of the Invention In view of the above-mentioned conventional situation, the present invention is directed to a system that requires an order to turn on/off power to a plurality of devices, such as a computer system. The object of the present invention is to provide a device for sequentially controlling cutting.

(dl) Structure of the Invention To achieve the above object, the sequential power on/off device of the present invention has an on-delay timer, an off-delay timer, and a relay for each power-controlled device, and each on-delay timer is connected to a power switch.・The electrical contact inserted into the first power supply line of the relay belonging to the corresponding power controlled device is activated at the set time after the 7th switch is turned on, and each relay Close the electrical contact inserted into the power line of the power supply control device, and close the electrical contact connected in series with the electrical contact of the on-delay timer in the first power supply line of the relay belonging to the next power controlled device. , each off-delay timer is configured to operate at a set time after the power switch is turned off to open an electrical contact inserted into a second power supply line of the relay belonging to the corresponding power controlled device; This is a characteristic feature.

(e) Embodiment of the Invention Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a schematic configuration diagram of such an embodiment, in which 1 is a power supply, 2 is a first device, 3 is a second device, 4 is a third device, and 5 is a power supply sequential turning on/off device of the present invention. be. In this embodiment, the sequential power on/off device 5 comprises three devices 2.3.
(a) and (bl) of the time chart in Figure 2 for 4.
As shown in (0), when the power is turned on, the first device 2, the second device 3, and the third device 4 are executed in the order of 1 second intervals, and when the power is turned off, the third device is executed at 1 second intervals. Device 4, second
The first device 3 and the first device 2 are configured to perform the operations in this order.

FIG. 3 is a diagram showing a specific configuration of the power supply sequential turning on/off device 5, where SW is a power switch, ON7-1-0NT-3.
0FFT-1 to 0FFT-3 are on-delay timers, 0FFT-1 to 0FFT-3 are off-delay timers, and RL-1 to RL-3 are relays, which are cascaded to the power supply line PWL as shown. Here, to briefly explain about the on-delay timer and the off-delay timer, as is well known, the on-delay timer has the function of closing its electrical contacts at a predetermined time after power is turned on, and then instantly opening the closed state when the power is turned off. Furthermore, the off-delay timer has the function of closing its electrical contacts instantaneously after the power is turned on, and opening the closed state at a predetermined time after the power is turned off.

The first on-delay timer QNT-1, the first off-delay timer 0FFT-1, and the first relay RL-1 are for sequentially controlling power on/off of the first device 2, The electrical contact ont-1 of the on-delay timer 0NT-1 is connected to the first feed line L11 of the relay RL-1.
The electrical contact off-1 of the off-delay timer 0FFT-1 is inserted into the second feed line L1 of the relay RL-1.
The electrical contact r1-1 of the relay RL-1 is inserted into its own second feed line LlZ, inside the power line P label, and into the first feed line L21 of the second relay RL-2. There is.

The second on-delay timer 0NT-2, the second off-delay timer 0FFT-2, and the second relay RL-2 are for sequentially controlling power on/off of the second device 3, The electrical contact ont-2 of the on-delay timer 0NT-2 is connected to the first power supply line L21 of the relay RL-2.
The electrical contact off-2 of the off-delay timer 0FFT-2 is inserted into the second power supply line L2 of the relay RL-2.
The electrical contact r1-2 of the relay RL-2 is inserted into the second power supply line L22 of itself, the power supply line PWL, the second power supply line L12 of the first relay RL-1, and the third power supply line L22 of the relay RL-2. Each is inserted into the first power supply line L31 of the relay RL-3.

The third on-delay timer 0NT-3, the third off-delay timer 0FFT-3, and the third relay RL-3 are for sequentially controlling power on/off of the third device 4, The electrical contact ont-3 of the on-delay timer 0NT-3 is connected to the first feed line L31 of the relay RL-3.
The electrical contact off-3 of the off-delay timer 0FFT-3 is inserted into the second feed line L3 of the relay RL-3.
The electrical contact r1-3 of the relay RL-3 is inserted into the second power supply line L32, the power supply line PWI, and the second power supply line L22 of the second relay RL-2. has been done.

Now, the power on/off sequence control operation in the above configuration will be explained. First, if we consider the case where the power switch SW is turned on, each off-delay time? 0FFT
-1,0FFT-2,0FFT-3 electrical contact off
-1, off-2, and off-3 close instantly. One second later, the first on-delay timer 0NT-1 operates to close its electrical contact ont-1. This causes the first relay RL-1 to operate and close its electrical contact r1-1. As a result, the power is turned on to the first device 2, and this power supply state is maintained by the relay RL-1 closing the second power supply line L12 for self-holding. FIG. 3 shows this state. Then, one second after this, that is, two seconds after turning on the power switch sw, the second
On-delay timer 0NT-2 operates and closes its electrical contact ont-2. This causes the second relay RL
-2 is operated and its electrical contact r1-2 is closed, and the second
Power is turned on to the device W3. This power supply state also continues as the relay RL-2 closes the second power supply line L22 for self-holding. Furthermore, one second after this, that is, three seconds after turning on the power switch SW, the third on-delay timer 0NT-3 operates, its electrical contact ont-3 closes, and the third relay RL
-3 and power is turned on to the third device 4.

In this way, the three power controlled devices 2.3 and 4
2. After turning on the power switch, there is a 1 second delay.
Power-up is performed in the order of the devices in 3.4.

Next, consider the case where the power switch SW is turned off.

By this disconnection, each on-delay timer ○NT-1,
Electrical contacts ont-1, o of 0NT-2 and 0NT-3
nt-2 and ont-3 open instantly, and each relay RL-1
, RL-2, and RL-3 first feed line L11.
L21. L31 is opened. One second after this, the third off-delay timer 0FFT-3 operates to open its electrical contact offt-3. This causes the third relay RL
-3 becomes inoperative and opens its electrical contact rl-3. As a result, the power to the third device 4 is cut off. One second later, that is, two seconds after the power switch SW is turned off, the second off-delay timer 0FF is turned off.
T-2 is actuated to open its electrical contact offt-2, causing the second relay RL-2 to deactivate and open its electrical contact rl-2, cutting off power to the second device 3. It turns out. What should be noted here is that if the third device 4 is still powered on because the third relay RL-3 does not operate for some reason, the off-delay timer 0FFT- When the electrical contact r1-3 of the relay RL-3 connected in parallel with the electrical contact off-2 of the timer 0FFT-2 is closed, the timer 0FFT-2
Even after the operation of , the second relay RL-2 continues to operate and the second device 3 is also kept powered on. Now, assuming that there is no abnormality in the above operation, one second later, that is, three seconds after the power switch SW is turned off, the first off-delay timer 0FFT-1 operates and its electrical contact of
Open ft-1. As a result, the first relay RL-1
becomes inactive, and the power to the first device 2 is cut off.

In this way, the three power controlled devices 2.3 and 4
4. There is a 1 second time delay after the power switch SW is turned off.
Powering down is performed in the order of devices in 3.2.

In addition, in the above embodiment, power on/off sequence control was explained for three devices, but such a method can be applied to the final stage on-delay timer, off-delay timer, and relay for more than three devices. Sequence control can be easily performed by sequentially connecting different parts in a subordinate manner.

(f) Effects of the Invention As is clear from the above description, the sequential power on/off device of the present invention can turn on/off power to a plurality of devices in a desired order. Large inrush currents can be avoided, and as a result, inexpensive parts such as cables and breakers with small allowable currents can be used, and malfunctions and equipment destruction can be prevented, resulting in extremely large practical effects.

[Brief explanation of drawings]

The drawings are diagrams showing one embodiment of the present invention, and FIG. 1 is a schematic configuration diagram, FIG. 2 is a time chart for explaining the operation, and FIG.
The figure is a specific configuration diagram of the power supply sequential turning on/off device. 1: power supply, 2, 3 and 4; non-power supply control device, 5: power supply sequential on/off device, PWL: power line, SW: power switch, 0NT-1, 0NT-2 and 0NT-3 onion delay timer, ont-L ont-2 and ont-3j on-delay timer electrical contacts, 0FFT
-1゜0FFT-2 and 0FFT-3: off delay timer, off-1, offt-2# and off-
3: Off-delay timer electrical contacts, RL-1, RL-
2 and I? L-3: relay, rl-1° rl-2 and rl-3: electrical contacts of the relay, Lll, L21 and L31: first feed line of the relay, L12. L22
1 and L32: second feed line of the relay. 2

Claims (2)

[Claims] (1) In a configuration in which power is sequentially turned on and off to a plurality of devices, each power-controlled device has an on-delay timer, an off-delay timer, and a relay, and each on-delay timer is connected to a power switch. operate at a set time after turning on to close the electrical contact inserted into the first power supply line of the relay belonging to the corresponding power controlled device;
When each of the relays is energized, it closes an electrical contact inserted into the power supply line of the corresponding power controlled device, and also connects the on-delay timer in the first power supply line of the relay belonging to the next power controlled device. closes the electrical contact connected in series with the electrical contact of the power switch, and each of the off-delay timers operates at a set time after the power switch is turned off, and the off-delay timer operates in the second power supply line of the relay belonging to the corresponding power controlled device. A sequential power on/off device characterized by being configured to open inserted electrical contacts. (2) The on-delay timer and the off-delay timer, which are combined into a pair for each power-controlled device, are selected to operate in an inverse relationship, and the off-delay timer is connected to the second power supply line of the relay. The sequential power on/off system according to claim 1, wherein the electrical contacts of the relay are connected in series with the contacts, and the electrical contacts of the next relay are connected in parallel with the contacts. Device.