JPS5835390B2 - Package erroneous insertion detection method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for detecting mounting errors in packages for electronic devices.

Electronic circuits or logic circuits used in computers, communication devices, etc. are made by placing electronic components or logic elements on a printed wiring board and using several so-called circuit packages that have a certain function on a back panel. The method used is to configure the entire logic using panel wiring.

There are several types of this package, each with different functions.

Therefore, if each package is not inserted correctly into its designated position, not only will the device not operate normally, but also the power supply voltage may differ depending on the electronic components or logic elements used. This may lead to damage to components or logic elements.

In order to prevent such inconvenience, conventionally, as shown in FIG. 1, the packages 1 to 3 corresponding to the respective plug blocks 4 to 6 provided on the back panel (not shown) are inserted without fail. If the return line X- on each package
A system is adopted in which a closed circuit including the power supply 8 is formed through the power source 8, and the current in this closed circuit is monitored by the abnormality signal generating circuit 7.

If the package is inserted incorrectly, the closed circuit will open and the closed circuit current will no longer flow, so an abnormal signal will be generated from the abnormal signal generating circuit 7 and an alarm, lamp, etc. will be activated.

The conventional method described above has the following drawbacks.

For example, as shown in Fig. 2, various packages 11 are inserted into the plug block 10 on one back panel 9, and furthermore, packages 11 that can be inserted arbitrarily according to customer requests can be added so that so-called options can be installed. When the connector block 12 is provided, in the conventional method, the wiring on the back panel requires wiring each package in series, so the wiring must be changed depending on whether various packages are inserted or not. It is necessary to insert a dummy package into a plug block in which no package is inserted, and there is a drawback that a back panel must be made individually or a dummy package must be inserted for each.

Furthermore, it is not economical because it is necessary to constantly energize the detection closed circuit.

An object of the present invention is to provide a novel package erroneous insertion detection method that solves the drawbacks of the conventional method as described above.

Therefore, in the package misinsertion detection method according to the present invention, when a package is inserted into any connector block on the pan cage, the connector of that connector block (hereinafter, the connector with the connector is referred to as the first connector) A plug is provided on each package that contacts the plug on the package, and only when the package is incorrectly inserted into a plug block that does not correspond to the plug (hereinafter Connect the second valve to the
A first connector of each connector block is connected in common, and a second connector of each connector block is connected in common. The present invention is characterized in that erroneous insertion of the package into each plug block is detected by monitoring the current flowing between the two common connections.

Next, one embodiment of the present invention will be described in detail with reference to FIG.

Packages 21, 22, and 23 have different power supply voltages ■1~
Logic circuits 24, 25, and 26 each requiring 6 are mounted, and their respective O2 lines are unified and connected to the plug P1.

Also, in the package 21, the plug P2. The O■ line is also connected to P4.

In the package 22, Ov is connected to the plug P2. P3 is also connected, and in the package 23, the plug P3. Connect Ov to each plug of P4.

Then, the plugs P3 of the package 21 are set to all plugs, the plugs P4 of the package 22 are set to all plugs, and the plugs P2 of the package 23 are set to all plugs.

The plug block 27 corresponding to the package 21 includes a first plug that contacts the OV plug P1 of the package 21, a second plug that contacts all the plugs P3, and a power plug P6 of the package 21. ．． P7 and signal output plug P5 are each provided with a corresponding plug therein.

The first connector of the connector block 27 is connected to the detection DC power source 3.
The second plug is connected to the line 30.

The plug block 28 corresponding to the package 22 has a first plug that contacts the OⅠ plug P1 of the package 22, a second plug that contacts all the plugs P4, and a power plug P6 . P7
t=- and the signal output plug P5 are provided with corresponding plugs that respectively contact the signal output plug P5.

A first plug of this plug block 28 is grounded, and a second plug block is connected to the line 30.

The plug block 29 corresponding to the package 23 includes a first plug that contacts the OV plug P1 of the package 23, a second plug that contacts all the plugs P2, and a power plug P6 . P7
A female connector is provided which contacts the signal output connector P5 and the signal output connector P5, respectively.

The first spigot is grounded and the second spigot is connected to line 30.

A line 30 to which the second plugs of the respective plug blocks 27 to 29 are connected in parallel is connected via a resistor 33 to an anode of a light emitting diode on the input side of a 7-power plug 340 in the abnormality detection circuit 31. .

The cathode of the light emitting diode is connected to the negative electrode of the power source 32 mentioned above.

The emitter of the output side phototransistor of the photocoupler 34 is grounded, and the collector is connected to the input terminals of the power-on prevention circuit 35 and the alarm circuit 36.

When at least one package is inserted into a connector block in the normal correspondence shown, the second connector in each connector block contacts all connectors in the inserted package, so that all connectors are The connection between the first and second plugs of the plug block is opened.

Therefore, the detection wire 30 is not energized.

However, if the package 21 is mistakenly inserted into a non-corresponding connector block 28, the second connector of the connector block 28 will come into contact with the Ov connector P4 connected to the Ov connector P1 on the package 21.

Therefore, a short circuit occurs between the first and second plugs of the plug block 28 via the package 21, and the line 30, the package 21. A closed circuit is formed between the detection current, the photocoupler 34, and the resistor 33, a current flows therethrough, and the phototransistor of the photocoupler 34 becomes conductive.

Thus, the power-on prevention circuit 35 is activated and the power supply voltage ■
Insertion of packages 1 to 6 is prevented, and the alarm circuit 36 is activated to report incorrect insertion of the package.

Note that the connector on the package that comes into contact with the first connector of the connector block does not have to be an O■ connector, but if an O■ connector is used, the increase in the number of connectors on the package can be suppressed. It is advantageous to be able to do so.

Furthermore, the configuration of the abnormality detection circuit can be changed as desired.

As described above, in the package misinsertion detection method of the present invention, a detection loop is formed by misinsertion of a package, so there is no need to insert a termi package into every plug block, and therefore the number of packages used can be reduced. There is no need to change the detection wiring according to increases or decreases in
Furthermore, since the detection loop is not constantly energized, it is possible to achieve many effects such as saving power.

In the above explanation, a package in which a circuit is mounted on a printed wiring board has been described, but the term "package" as used in the present invention refers to a unitized electric circuit block in a broad sense other than in the form of a so-called package. Of course there are.

[Brief explanation of drawings]

Fig. 1 is a diagram showing a conventional package misinsertion detection method, Fig. 2 is an explanatory diagram of one form of an electrical device configured by mounting a large number of packages on a back panel, and Fig. 3 is a diagram showing a package misinsertion detection method according to the present invention. FIG. 3 is a diagram illustrating an example of an insertion detection method. 21-23... Package, 27-29... Junction block, P1-P7... Junction on package, 30.
...Detection line connected to the second plug of the plug block, 31...Detection circuit, 32...Detection power supply, 34
... Photocoupler, 35 ... Power-on prevention circuit, 3
6...Alarm circuit.

Claims (1)

[Scope of Claims] 1. A device comprising a plurality of plug blocks and at least one package inserted into a corresponding specific plug block of the plug blocks, in which the above-mentioned A connector is provided that comes into contact with the connector of any connector block when inserted into the connector block (hereinafter, the connector with the connector will be referred to as the first connector), and on the package, When the package is connected to the connector on the package and the package is incorrectly inserted into the connector block that does not correspond to the connector, the connector contacts the connector of the connector block (hereinafter this connector is referred to as the second connector). connecting the first connectors of each of the leftover connector blocks in common, and connecting the second connectors of each of the connector blocks in common, and connecting the two common connections. A method for detecting erroneous insertion of a package, characterized in that erroneous insertion of the package into each of the plug blocks is detected by monitoring a current flowing between the parts.