JPH06223950A - Cable erroneous connection detecting device - Google Patents

Abstract

PURPOSE:To provide a cable erroneous connection detecting device capable of instantaneously detecting erroneous connection and preventing a connected apparatus from being damaged. CONSTITUTION:A cable erroneous connection detecting device detects the erroneous connection of a cable 4 when the connector 3 of a cable terminal is connected to the interface 2 of an electronic apparatus 1 side. The fixed logical signal generating circuit 5 of the electronic apparatus 1 side generates multiple different fixed logical signals and guides them to the prescribed terminals of the interface 2 respectively. The connector 3 side receives multiple fixed logical signals when it is connected to the interface 2, generates an ID signal indicating the type of the cable via the optional combination, and sends it back to the interface 2. The compatibility judging circuit 6 of the electronic apparatus 1 side collates the ID signal inputted through the interface 2 with the ID registered in advance and judges whether the connection between the cable 4 and the interface 2 is compatible or not.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cable erroneous connection detection device for detecting erroneous cable connection when a connector provided on a cable terminal is connected to a cable connection interface mounted on an electronic device.

[0002]

2. Description of the Related Art Conventionally, in order to detect that a cable is erroneously connected to an interface of an electronic device, a signal is passed through the connected cable, and a failure that occurs when a failure occurs in the signal transmission is analyzed. I was taking the way.

[0003]

However, the above-mentioned conventional cable erroneous connection detection method cannot detect when a failure does not occur at the time of cable erroneous connection, and even if a failure occurs, it is very difficult to analyze the failure. It takes a long time, and depending on the degree of failure that has occurred, it may cause considerable damage to the connected equipment, which is dangerous.

As described above, in the conventional method, a signal is caused to flow through a connected cable and a failure occurring when a failure occurs in the signal transmission is analyzed. If the error does not occur, the failure cannot be detected, and even if the error occurs, it takes a lot of time to analyze the error, and depending on the degree of the error that occurred, the connected device may be considerably damaged.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a cable erroneous connection detection device capable of instantaneously detecting an erroneous connection and not damaging a connected device. .

[0006]

SUMMARY OF THE INVENTION The present invention provides a cable erroneous connection detection device for detecting an erroneous cable connection when a connector provided on a cable terminal is connected to a cable connection interface mounted on an electronic device. ,
Fixed logic signal generation means provided on the electronic device side, which generates a plurality of different fixed logic signals and derives the fixed logic signals to predetermined terminals of the interface, and a connector, which is provided on the connector and fetches a plurality of fixed logic signals from the interface, ID generation / sending means for generating an ID signal representing the type of the cable in any combination and sending it back to the interface, and an ID signal provided on the electronic device side and input through the interface for preregistering the ID signal.
And a matching determination unit that determines whether or not the connection between the cable and the interface is matched.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows the configuration of a cable misconnection detecting device according to the present invention. FIG. 1 (a) is an overall configuration diagram,
FIG. 3B is a diagram showing the internal structure of the connector.

Reference numeral 1 denotes an electronic device, on which an interface 2 for signal input / output is mounted. Reference numeral 3 is a connector for connecting the cable 4 to the interface 2. Inside the electronic device 1, a fixed logic signal generation circuit 5 for generating a plurality of fixed logic signals, and an ID signal sent from the connector 3 through the interface 2 at the time of connector connection are compared and collated with a pre-registered ID. A compatibility determination circuit 6 for determining whether or not the connected connector (cable) is compatible is provided.

The connector 3 receives a plurality of fixed logic signals from the electronic device 1 side in a state of being connected to the interface 2 and sends them to a plurality of logic signal buses C11, C12 ... An ID signal line C2 for generating an ID assigned to each cable is provided on each logic signal bus C11, C12, ....
1, C22, C23, C24, ... Are connected. The fixed logic signal taken out by each ID signal line is sent to the conformity determination circuit 6 via the interface 2 as an ID signal.

The operation of the above structure will be described below with reference to FIGS. 1 (a) and 1 (b).

Now, it is assumed that the fixed logic signal generation circuit 5 of the electronic device 1 generates two fixed logic signals S1 "a" and "b". The fixed logic signal S1 is sent to a predetermined terminal of the interface 2. When the connector 3 is connected to the interface 2 in this state, the fixed logic signal S1
"A" and "b" of the above flow to the logic signal buses C11 and C12 inside the connector, respectively.

Inside the connector 3, the ID signal line C2
When 1, C22, C23 and C24 are connected to the logic signal buses C11 and C12 as shown in FIG. 1B, the ID signal S2 of "a", "b", "b" and "a" is generated. And is sent to the conformity determination circuit 6 through the interface 2.

A correct cable ID is registered in advance in the conformity determining circuit 6, and the ID is determined by connecting the connector.
When a signal is sent, it will be checked against this registered ID,
When they do not match, it is determined that the connected cables are unsuitable, and the incorrect cable connection detection signal E1 is transmitted.

Therefore, the cable erroneous connection detection device having the above configuration can instantly detect the erroneous connection. Furthermore, when connecting the cable, the ID is sent from the fixed logic signal inside the connector.
Is generated and sent back, and no signal is sent to the cable, so there is no risk of damaging the connected equipment.

It is needless to say that the present invention is not limited to the above-described embodiments, and can be implemented with various changes without departing from the gist of the present invention.

[0017]

As described above, according to the present invention, it is possible to provide a cable erroneous connection detection device which can detect an erroneous connection instantly and which does not damage the connected equipment.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a cable misconnection detecting device according to an embodiment of the present invention.

[Explanation of symbols]

 1 electronic equipment 2 interface 3 connector 4 cable 5 fixed logic signal generation circuit 6 compatibility judgment circuit C11, C12 fixed signal bus, C21, C22, C23, C24 ID signal line S1 fixed logic signal S2 ID signal E1 cable misconnection detection signal

Claims (2)

[Claims] 1. A cable erroneous connection detection device for detecting an erroneous cable connection when a connector provided on a cable terminal is connected to an interface for connecting a cable mounted on the electronic device, wherein the device is provided on the electronic device side. Fixed logic signal generation means for generating a plurality of mutually different fixed logic signals and deriving the fixed logic signals to a predetermined terminal of the interface, and a plurality of fixed logic signals provided in the connector and fetched from the interface and arbitrarily combined. ID generating / sending means for generating an ID signal indicating the type of the cable and sending it back to the interface, and an ID signal provided through the interface, which is provided on the electronic device side, is collated with a pre-registered ID, Whether the cable is properly connected to the above interface An erroneous cable connection detection device comprising: a conformity determination unit that determines whether or not the cable is erroneously connected. 2. The ID generation / transmission means takes in a plurality of fixed logic signals from the interface and supplies them to a plurality of fixed logic signal lines, selects an arbitrary line from the plurality of fixed logic signal lines, and selects a connector terminal. 2. The cable erroneous connection detection device according to claim 1, wherein an ID signal is sent to the interface when the connection is made by connecting to the cable.