JPH09130968A - Power supply system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power supply system comprising a plurality of packages in which each package can be protected against breakdown due to insertion/ removal of a live wire or insufficient contact. SOLUTION: The power supply system comprises a plurality of packages 1-6 having I/O terminals 1a-6a, 1b-6b for monitoring which conduct upon mounting and power supply input terminals 1c-6c, and a power supply board 7 mounting an OBP 9 for supplying power from a secondary power supply (e) to the power supply input terminals 1c-6c of each package upon conduction of a primary power supply (d). The I/O terminals 1a-6a, 1b-6b for monitoring of each package and the OBP 9 are connected in series through a back wiring board(BWB) 10 to form a circuit for monitoring the mounting. The circuit for monitoring is then inserted with relay circuits 8, 8' for controlling the conduction of primary power supply (d) which is allowed to be conducted only when it is closed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for controlling power supply timing from a power board to each package in a system having a plurality of packages and one power board.

[0002]

2. Description of the Related Art For example, a plurality of packages mounted in a data transmission system or the like is an on-board power supply (hereinafter, OBP)
It has become possible to activate each package. However, the package including the OBP has a large scale because it includes a power supply circuit, and when a plurality of packages are incorporated to form one unit, the mounting area of other circuits and components is greatly limited. In particular, a large-scale package will be a multi-package.

Therefore, conventionally, when a single system is constructed with a plurality of packages, a power board equipped with an OBP and a plurality of packages not equipped with the OBP are combined.
It is often practiced to energize the primary side power supply to the power board from the back wiring board (BWB) to activate the OBP, and thereby individually supply the secondary side power supply to the corresponding package. On the other hand, a package power supply in which the power supply itself is packaged is also known, but in this case, after confirming that each package is normally mounted, the power supply is individually and manually started.

[0004]

As described above, in the related art, one power supply panel equipped with an OBP is energized with the primary power supply from the BWP to individually supply the secondary power supply to a plurality of packages. The method of supplying power was adopted. However, in a system in which a secondary power supply is individually fed from a single power supply panel to a plurality of packages, hot plugging and unplugging of the packages and poor contact pose problems. In other words, if a particular package is removed and inserted while the system is operating, noise will be mixed into other packages, the power supply level in each package will fluctuate, and the signals flowing between the packages will be inconsistent. The operation may become unstable. Depending on the circuit components mounted on the package, the package may become inoperable. Such a situation also occurs when a package is mounted or when there is a contact failure due to aging of contacts.

Further, in the case of the package power supply, if the power supply input terminal of the package on the side to which power is supplied is different, there is a problem that the circuit components of the package will be destroyed at the time of erroneous mounting.

The present invention solves the above conventional problems,
It is an object of the present invention to provide a power supply system for protecting each package from harmful effects such as hot-plugging and unplugging and contact failure in a system including a plurality of packages and one power supply panel on which an OBP is mounted.

[0007]

SUMMARY OF THE INVENTION A power supply system provided by the present invention is a plurality of packages each having a monitoring input / output terminal and a power input terminal which are electrically connected at the time of mounting, and a power input of each package when a primary power supply is energized. A power supply system in a system having an on-board power supply for supplying a secondary power supply to a terminal, and a monitoring input / output terminal of each package and the on-board power supply in a back wiring board. A mounting monitoring circuit is formed by connecting in series, and an energization control circuit for controlling energization of the primary side power supply is inserted and connected to the mounting monitoring circuit, and the onboard power supply is connected only when the mounting monitoring circuit is closed. It is characterized in that the energization of the primary side power source is allowed.
As a result, power is supplied to multiple packages at the same time,
When the mounting monitoring circuit opens, that is, when at least one package has a poor contact or is removed, power supply to all packages is stopped.

Preferably, the monitoring input / output terminals are formed at different positions for each package, and when the packages are mounted at correct positions and the monitoring input / output terminals are conductive, the mounting monitoring circuit is provided. Shall be closed. In this way, erroneous mounting is prevented and package damage is prevented.

By providing an ejector switch for opening and closing the mounting monitoring circuit between the monitoring input / output terminals of each of the plurality of packages, one of the ejector switches is turned off at the time of maintenance. The mounting monitoring circuit opens and power supply to all packages is stopped.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a power supply system of the present invention. In this embodiment, six packages 1 to 6 without OBP are installed, and
It shows an example of a system formed by connecting to one power board 7 equipped with BP9.

Each package is provided with monitoring input / output terminals 1a to 6a and 1b to 6b which are conducted at the time of mounting and power supply input terminals 1c to 6c for inputting a secondary side power supply of a predetermined level. Monitoring input / output terminals 1a-6a, 1b-6
b is formed at a different position for each package, and does not conduct unless it is correctly mounted at a regular position of a package unit (not shown). When properly mounted, each monitoring input / output terminal 1a to 6a, 1
b to 6b and the monitoring input terminal 7a of the power board 7 are connected in series via the BWB 10 provided in the package unit.

Further, the monitoring input terminal 3 in the power supply panel 3
A relay circuit including a relay 8 and a relay contact 8'is inserted and connected to the line connecting a and OBP9. The power board 7 is further provided with a power supply terminal 7b for inputting the primary power supply d, and a ground terminal 7c for connecting the primary ground a and the OBP 9 to each other.
Monitoring input / output terminals 1a to 6a, 1b to 6b of each package and a monitoring input terminal 7 of the power supply panel connected in series via
Package 1 with a, relay circuit, and OBP9
Mounting monitoring circuits for monitoring the mounting conditions of 6 to 6 are formed.

The reference numeral b in the BWB 10 is a monitoring input / output terminal 1a, 2a, 3a, 4a, 5a, 6a, 7
Reference numeral c is an input line for connecting to a, and reference numeral c is an output line for connecting to the monitoring output terminals 1b, 2b, 3b, 4b, 5b, 6b.

In the system having such a configuration, when the packages 1 to 6 are properly mounted at the proper positions, the mounting monitoring circuit is closed and the monitoring input / output terminals 1a to 6a of the respective packages connected by the BWB 10 are closed. , 1b to 6b
The monitoring input terminal 7b of the power supply panel 7 becomes the primary side ground a via the. As a result, a current flows through the relay 8, the relay contact 8'is turned on, and the primary side power source d is OBP.
9 is input to the power input terminals 1c to 6 of each package.
The secondary power supply e is simultaneously supplied to c.

On the other hand, when the packages 1 to 6 are not properly mounted at the proper positions, for example, when different packages are inserted or there is a contact failure, the mounting monitoring circuit is opened and the relay contact 8'is left open. Therefore, O
The primary power supply d is not supplied to BP9. Therefore OBP
9 does not start, and the secondary power supply e is not supplied to each package. As a result, it is possible to prevent the package from being damaged due to the supply of power while being erroneously mounted.

Further, if power is supplied to the packages 1 to 6 normally, and a certain package is pulled out or a contact failure occurs while the system is operating, the monitoring input of that package will occur. The output terminal becomes non-conductive. Therefore, the monitoring input terminal 7b of the power supply panel 7 is changed from the primary side ground a to the open state, the relay 8 is deactivated, and the relay contact 8'is opened. This allows O
Since the supply of the primary power supply d to the BP 9 is stopped, the supply of the secondary power supply e to other packages is blocked at the same time. As a result, it is possible to prevent the influence of noise and voltage fluctuation that occur in another package when one package is removed.

FIG. 2 is a connection configuration diagram showing another embodiment of the present invention, in which ejector switches 11 to 16 are added between the monitoring input / output terminals of the system having the configuration shown in FIG. . The ejector switches 11 to 16 are
Actually, the packages are arranged on the front surface of each of the packages 1 to 6 so that they can be turned on / off when mounted in the package unit. In the system having such a configuration, the mounting monitoring circuit is not closed unless all the ejector switches 11 to 16 are turned on, so that the OBP 9 does not start and the packages 1 to 6 are not supplied with power. In other words, in the operating system, by turning off the ejector switch of any package, the power supply to all packages can be stopped at the same time.

This eliminates the need to turn off the power supply panel 7 or forcibly open the mounting monitoring circuit by removing the package during maintenance of the system, for example. Further, it is possible to prevent the adverse effect caused by supplying the secondary power supply e to the package at the same time when the package is inserted.

Although the present embodiment is as described above, the present invention is not necessarily limited to the above example, and design changes can be made without departing from the scope of the invention. For example, in the present embodiment, the energization control circuit is configured by the relay 8 and the relay contact 8 ', but any type of it may be used as long as it can detect the open / closed state of the mounting monitoring circuit.

[0020]

As is apparent from the above description, according to the present invention, power supply to all packages is blocked when there is hot plugging / unplugging, contact failure, etc., so that destruction of the packages is effective. Can be prevented. Also, the monitoring input / output terminals are formed at different positions for each package,
Since power is not supplied unless all the regular packages are correctly mounted, the harmful effects caused by wrongly mounting different types of packages can be prevented. Furthermore, power is not supplied to all packages unless all eject switches between the monitoring input / output terminals provided in each package are turned on, improving maintainability and
This has the effect of preventing adverse effects during package insertion.

[Brief description of the drawings]

FIG. 1 is a connection configuration diagram showing an embodiment of a power supply system of the present invention.

FIG. 2 is a connection configuration diagram showing another embodiment of the power supply system of the present invention.

[Explanation of symbols]

 1 to 6 package 7 power board 8 relay 9 on-board power supply (OBP) 10 back wiring board (BWB) 1a to 7a monitoring input terminal 1b to 6b monitoring output terminal 1c to 6c, 7b power input terminal 7c ground terminal 11 to 11 16 Ejector switch a Primary side ground b BWB input line c BWB output line d Primary side power supply e Secondary side power supply

Claims (3)

[Claims] 1. A plurality of packages having a monitoring input / output terminal and a power input terminal that are conducted during mounting, and an on-board power supply that supplies a secondary power supply to the power input terminals of each package when the primary power supply is energized. And a power supply system in a system having a power supply panel, wherein a monitoring input / output terminal of each package and the on-board power supply are connected in series by a back wiring board to form a mounting monitoring circuit, and An energization control circuit that controls energization of the primary power supply is inserted and connected to the mounting monitoring circuit so that energization of the primary power supply to the onboard power supply is allowed only when the mounting monitoring circuit is closed. Characteristic power supply system. 2. The mounting monitoring is performed when the monitoring input / output terminals are formed at different positions for each package, and all the packages are mounted at correct positions and the monitoring input / output terminals are conductive. The power supply system according to claim 1, wherein the circuit is closed. 3. The power supply system according to claim 1, further comprising an ejector switch for opening and closing the mounting monitoring circuit between monitoring I / O terminals of each of the plurality of packages.