JPS60136A - Power supply system of plural information input or output devices connected to system bus - Google Patents

Abstract

PURPOSE:To attain an effective power supply system by connecting an interface circuit and an information input or output device via an optical coupling circuit, and supplying the power to the interface circuit and the interface side of the optical coupling circuit via a power supply bus. CONSTITUTION:An information input or output device is connected to interfaces 4-1-4-n connected to a system bus 1 through an end of each interface. While optical coupling device 5-1-5-n are connected to those interfaces through each end of the other side for photoelectric conversion. Furthermore, the information input or output device is connected to the other end of each of devices 5-1-5-n respectively. Then, the driving power is supplied to these interfaces and the coupling devices from a shared power supply device 7 via a power supply bus 2 which is parallel to the bus 1.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a power supply method for an L output device that spans a plurality of information busses connected to a system bus. When controlling multiple input/output devices, the power supply of all input/output devices connected to the system bus should be turned off to prevent the system bus from being adversely affected by a power outage.

It had to be kept on at all times.

This means that in the A1 measurement/stem, etc., which have been widely adopted in recent years, the system is composed of multiple small-scale devices related to one measurement, and these devices comply with the IEC standard or the IEEE 488 standard. This also applies to cases where the computer is controlled via a bus. However, in such a measurement system, the devices connected to the system bus are small-scale, such as voltmeters, ammeters, etc.

In addition, many of them are of a general-purpose type, and therefore it becomes necessary to frequently change the system configuration or to incorporate or remove some devices from the system. Therefore, each time the power of a device connected to the system bus is turned off, noise may be generated on the system bus, or the entire system bus may be disconnected between devices operating on their respective power supplies. This has the drawback that the electric potential changes due to the current flowing through the device, causing malfunctions in the equipment in use.

An object of the present invention is to connect an interface circuit on the system bus side and an information input or output device using an optical coupling circuit, and to connect the power supply to the interface circuit and the interface side of the optical coupling circuit to the power supply bus. By deriving power from one shared power supply via the system bus, information personnel using the system bus can add or remove devices without causing malfunction to the output devices connected to the system bus. The purpose of this invention is to provide a power supply system for an output device.

According to the present invention, in a system in which information is exchanged between devices that input and output multiple pieces of information by using a full system bus, each of the information input or output devices connects to the system bus. a connected interface means at one end and a connected interface means at the other end of the interface means.

It is composed of an optical coupling means for converting and coupling electrical No. 114 and optical signals, and an information input or output means connected to the other end of the optical coupling means.

A1'J'' (a power source for driving the interface means and the interface connection side element of the optical coupling means);

One common power supply connected to the power supply bus through a power supply bus provided in parallel with the system bus. 19, a power supply that is supplied from the device and drives the information input or output means and the connection side element to the information input or output means of the optical coupling means.

A power supply system for a plurality of information input or output devices connected to a system bus is obtained, which is characterized in that the power is supplied by power means provided in each of the plurality of information input or output devices.

Next, nine embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing the system configuration of an embodiment according to the present invention. In this figure, 1 is IE
EE 488 standard system bus.

2 is a power supply bus. 3-1 to 3-n are information inputs.

or an output device, and these devices include 4-1 to 4-
n interface circuits, 5-1 to 5-n optical coupling circuits, and 6-1 to 6-n information input or output device bodies are each built-in. Reference numeral 7 denotes a shared power supply device, which is supplied to a portion of each of the devices 6-1 to 3-n via the power bus 2, as will be described later. In this example, a voltmeter is selected as the information person's head or the output device 1, a printer is set as 3-2, and a command device is set as 6-n. Therefore, 6-1 is for voltage, 1 body, 6-2 is the printer body, and 6-n
represent the main body of the command circuit.

Then, in order to show the relationship between these, transfer the example and its result to the lifter 3-2. '', the voltmeter 3-1 measures the voltage.

As a result, the printer 3 is connected to the printer 3 via the stem bus 1
Send to -2. Noise/Target 2 receives and records it.

Figure 2 1.1. , as a representative of the information input or output devices 5-1 to 3-n in FIG. 1, the specific configuration of the voltage side 5-1 is shown with emphasis on the characteristics of the present invention. In this figure, the i/taface circuits 4-1 each have a cable lever 7-41. A circuit is made up of a cable driver 42 and an inverter 46.

The input side of the cable receiver 41 and the output side of the cable driver 42 are connected to the system bus 1. The output side of the cable receiver 41, the input side of the cable driver 42, and the input side that directly controls the cable receiver 41 and controls the cable driver 42 via the inverter 46 are each connected to an optical coupling circuit 5. -1. The optical coupling circuit 5-1 is composed of light emitting diodes 51, 52 and 56 and phototransistors 54, 55 and 56, respectively. Of these, 2 light emitting diodes 51. Phototransistor 55 and phototransistor 56.

'' - are connected to the output side of the cable driver 41, the input side of the cable driver 42, and the cable receiver 41 and inverter 43 sides, respectively. Further, the phototransistor 542, the light emitting diode 52, and the light emitting diode 53 are all connected to the voltage drop main body 6-1. Furthermore, the light emitting diode 51 . of the interface circuit 4-1 and the optical coupling circuit 5-1. Power for driving the phototransistors 55 and 56 is supplied from the power supply unit 7 via the power supply unit 2 and the power supply 1 node 31, and from the phototransistor 54°), the V1 diode 52 and 53, and the voltmeter. Main body 6-1 The lζth power supply that drives the entire body is built into the voltmeter body, for example! , i is supplied by the power source.

To explain the operation of the device configured as described above, the command device 3-'n given via the system bus 1
The command signal from the cable driver 41 is received by the cable driver 41, applied to the two light emitting diodes 51, and converted into the /+-r light 5. "Converted Koshin Moont", phototransistor 54
It was accepted and again 'i11. A return signal is given to the voltmeter main body 6-1. On the other hand, in the voltage field body 6-1, the measured value +ti from the measurement terminal 1''m is internally converted into a digital value and given to the light emitting diode 52.

The optical signal converted by the light emitting diode 52 is received by the phototransistor 55, converted into an electric signal again, and then sent to the 7Sdem bus 1 through the cable driver 42. given to system bar 2 and recorded there. Note that when one of the cable receiver 41 and the cable driver 42 operates, the other becomes inoperative.

Switching control is performed so that one is inoperative when the other is in operation. The switching is performed when a control signal is given from the control line 32 to the light emitting diode 56 in accordance with the operating state of the voltage side main body 6-1, and the converted optical signal is sent to the phototransistor 5.
6, the signal is returned to an electric signal and directly controls the cable lever 7-41, and controls the cable driver 42 via the inverter 43.

Here, if the power to the voltmeter main body 6-1 is turned off.

Of course, the voltmeter will stop functioning.

The two light emitting diodes 53 do not operate because the power to be received via the power lead 34 is turned off.

Therefore, even if control line 62 is active.

The output of the phototransistor 56 will be pano/b, regardless of whether it is energized passively or at an intermediate potential. As a result, the gate of the cable receiver 41 connected to the control line 6.3 is turned on by the passive bell on the control line 6.3, and the cable receiver 41 becomes in the receiving state. 6-1 is not operating, even if the reception data is input to the cable receiver 41, it will be invalid.Also, the cable driver 42 receives data from the O-1, control 011 line 33 through the inverter 43. Since Paoff 1 is given to Game 1, it will not be inactive and will not send an erroneous signal to 7 Sudem bus 1. -11il'
As you can see from the results of , :, information input.

In order to leave the output device connected to the 7-stem bus 1, the running/V is connected to the 7-stem bus 1.In order to leave the driving body 11 in the state, the power supply to the circuit installed inside the corresponding device is turned off, but the optical coupling circuit is connected to the 7-stem bus 1. Since the relevant device is electrically isolated from system bus 1, the potential between each device on system bus 2 is the same, and no malfunction will occur to the device in use. .

In addition, in the above embodiment, the number of cable levers and cable drivers of the ink face circuit and the number of elements related thereto are only one each in accordance with the number of circuits; Information input,
A larger number can be used depending on the type of output device and the amount of information. Further, the shared power supply device 7 in FIG. 1 is incorporated into one of the most main devices connected to the system bus 1.

It can also be shared as an internal power source for the device. Further, in the above embodiments, the case where the system bus is applied to a measurement system has been described as an example, but it goes without saying that the system bus can be applied to a general information processing system. In this case, the input/output control device 6. of the terminal is used as an information input or output device connected to the system bus.
is applicable. Of course, following this, each necessary input/output device will be connected.

As is clear from the above description, according to the present invention, an optical coupling circuit connects an interface circuit on the system bus side and an information input or output device side, and an interface between the interface circuit and the optical coupling circuit is provided. In addition, the system can be easily rearranged without causing any malfunction of the power supply on either side, and even in the event of a failure, it is possible to repair the device without affecting the entire system.4:
In addition to efficient and economical operation, it also has significant benefits in terms of maintenance.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the system configuration of an embodiment of the present invention, and FIG. 2 is a block diagram showing a specific configuration of the information input or output device in FIG. 1. In the figure, 1 is the system bus, 2 is the power bus, and 3-
1 to 3-n are information input or output devices. 4-1 to 4-n are interface circuits, 5-1 to 5-n
6-1 to 6-n are information input or output device bodies; 7 is a shared power supply; 41 is a cable driver; 42 is a cable driver. 45 r, I.1/bark, 51, 52.53 are light emitting diodes 1', and 54+ 55+ 56 are phototransistors. Figure 1 3! −le

Claims (1)

[Claims] '1 Information is exchanged between devices that input or output a plurality of pieces of information via a 7-stem bus. In the system, each of the information input or output devices includes an interface means connected at one end to the system bus, and an optical coupling connected to the other end of the interface means for converting and coupling an electrical signal and an optical signal. and an information input or output means connected to the other end of the optical coupling means, and a power supply for driving the interface means and the interface connection side element of the optical coupling means is connected to the system bus. The information input or output means and the optical coupling means are connected to the information input or output means by being supplied from one shared power supply device connected to the power supply bus through parallel power buses. A power supply for driving all the M-side elements is provided in each of the plurality of information type JJs, tits, and output devices.
A plurality of information type tubes 1:f are connected to the system bus, each of which is supplied by the power source means.
c, F-F, 4Ij power supply system of power device.