JPS6220575B2 - - Google Patents
Info
- Publication number
- JPS6220575B2 JPS6220575B2 JP57051724A JP5172482A JPS6220575B2 JP S6220575 B2 JPS6220575 B2 JP S6220575B2 JP 57051724 A JP57051724 A JP 57051724A JP 5172482 A JP5172482 A JP 5172482A JP S6220575 B2 JPS6220575 B2 JP S6220575B2
- Authority
- JP
- Japan
- Prior art keywords
- devices
- contacts
- signal lines
- connector
- relay
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000001514 detection method Methods 0.000 claims description 14
- 230000015556 catabolic process Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 244000145845 chattering Species 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Debugging And Monitoring (AREA)
Description
【発明の詳細な説明】
（発明の技術分野）
本発明は、装置間において動作中に信号線の接
続を行う際の、インタフエース部における素子の
電気的破壊を防止するための、インタフエース保
護回路に関するものである。Detailed Description of the Invention (Technical Field of the Invention) The present invention provides interface protection for preventing electrical breakdown of elements at the interface portion when signal lines are connected between devices during operation. It is related to circuits.
（従来技術と問題点）
装置間において、動作中に信号線の接続、離脱
を行うことが必要になる場合がある。特に常時稼
働性を要求される装置の場合、このような必要性
が大きい。しかしながら動作中の装置間で信号線
の接続を行なつた場合、インタフエース部におい
て素子の電気的破壊を生じることがある。これは
両装置間のアースレベル差が大きく、アース線よ
り先に信号線が接続された場合に信号線に高電圧
がかかることが、その原因の１つと考えられる。(Prior Art and Problems) It may be necessary to connect and disconnect signal lines between devices during operation. This is particularly necessary for devices that require constant availability. However, when signal lines are connected between devices in operation, electrical breakdown of elements may occur at the interface portion. One of the reasons for this is thought to be that there is a large ground level difference between the two devices, and if the signal line is connected before the ground line, a high voltage is applied to the signal line.
従来は、動作中の装置間における信号線の接続
は保障されていなかつた。そのため装置間におけ
る信号線の接続を行う場合には、両装置の電源を
一旦停止して信号線の接続を行い、その後再び装
置を起動するようにしなければならなかつた。従
つて常時稼動が要求される情報伝送装置等におい
ては、動作中にタイプライタ等の外部機器を接続
することができず、稼動性の点で問題があつた。 Conventionally, connection of signal lines between devices during operation was not guaranteed. Therefore, when connecting signal lines between devices, it is necessary to temporarily stop the power to both devices, connect the signal lines, and then restart the devices. Therefore, in information transmission devices and the like that are required to operate constantly, it is not possible to connect external equipment such as a typewriter while the device is in operation, which poses a problem in terms of operability.
（発明の目的）
本発明は、このような従来技術の問題点を解消
しようとするものであつて、その目的は、常時稼
働性が要求される装置において、その都度電源を
停止することなく動作中に装置間の信号線の接続
を行うことができるような、インタフエース保護
回路を提供することにある。(Object of the Invention) The present invention aims to solve the problems of the prior art, and its purpose is to enable operation of devices that require constant operation without stopping the power supply each time. An object of the present invention is to provide an interface protection circuit that can connect signal lines between devices.
（発明の構成）
本発明のインタフエース保護回路は、装置間で
動作中に信号線の接続を行う場合、まず装置間で
アース線を接続し、アース線が確実に接続されて
両者のアース電位が同一になつたことを検出した
後、リレー接点によつて信号線を接続することに
より、インタフエース部の素子の電気的破壊を防
止するようにしたものである。(Structure of the Invention) When connecting signal lines between devices during operation, the interface protection circuit of the present invention first connects the ground wire between the devices, and ensures that the ground wires are connected to the ground potential of both devices. After detecting that the signals become the same, the signal lines are connected using relay contacts, thereby preventing electrical damage to the elements of the interface section.
（発明の実施例）
第１図は本発明のインタフエース防止回路の一
実施例の構成を示している。同図において、１は
アース接続検出回路、２はデイレイ回路、３，４
は接点、５はランプ、６はリレー、７はリレー６
の接点、８，８Ａは信号線である。第１図に示さ
れたインタフエース防止回路は、外部機器を接続
すべき装置のインタフエース部分に設けられる。(Embodiment of the Invention) FIG. 1 shows the configuration of an embodiment of the interface prevention circuit of the present invention. In the same figure, 1 is a ground connection detection circuit, 2 is a delay circuit, 3, 4
is a contact, 5 is a lamp, 6 is a relay, 7 is a relay 6
The contacts 8 and 8A are signal lines. The interface prevention circuit shown in FIG. 1 is provided at an interface portion of a device to which external equipment is to be connected.
第１図において、アース接続検出回路１は外部
機器とのアースの接続を検出すると、検出信号を
デイレイ回路２に出力する。デイレイ回路２は、
検出信号を受けた後一定時間後に内蔵するリレー
を駆動して、接点３，４を閉じる。このようにデ
イレイ回路２において動作に遅れを持たせるの
は、アース接続検出時におけるチヤタリングの発
生等を考慮して、アースが確実に接続されたこと
を保障するためである。 In FIG. 1, a ground connection detection circuit 1 outputs a detection signal to a delay circuit 2 when detecting a ground connection with an external device. The delay circuit 2 is
After a certain period of time after receiving the detection signal, the built-in relay is driven to close contacts 3 and 4. The reason for delaying the operation in the delay circuit 2 in this manner is to ensure that the ground is reliably connected, taking into consideration the occurrence of chattering when detecting the ground connection.
接点３が閉じたことによつてランプ５が点灯し
て、アースが接続されたことを外部に表示する。
また接点４が閉じたことによつてリレー６が駆動
され、接点７が閉じて装置内の信号線８と外部機
器に接続されている信号線８Ａとを接続し、これ
によつて装置間の信号線が接続される。 When the contact 3 is closed, the lamp 5 lights up to indicate to the outside that the earth is connected.
Also, when the contact 4 closes, the relay 6 is driven, and the contact 7 closes to connect the signal line 8 inside the device and the signal line 8A connected to the external device, thereby connecting the device. The signal line is connected.
第２図は第１図に示されたアース接続検出回路
の一構成例を示している。同図において８Ｂは信
号線、９はリレー、１０はリレー９の接点、１１
は装置間におけるコネクタの接続部、１２〜１６
は装置側におけるアース接続検出用のコネクタ接
点、１７は装置側におけるアース接続用コネクタ
接点、１８〜２２は外部機器側におけるアース接
続検出用コネクタ接点、２３は外部機器側におけ
るアース接続用コネクタ接点、２４，２５は装置
側における信号線接続用コネクタ接点、２６，２
７は外部機器側における信号線接続用コネクタ接
点である。なお接点２４，２５および２６，２７
は信号線２本の場合を示しているが、信号線の本
数は任意でよく、この場合は両側のコネクタ接点
および信号線を接続するリレー７の接点は、信号
線の数に対応して設けられる。 FIG. 2 shows an example of the configuration of the ground connection detection circuit shown in FIG. In the same figure, 8B is a signal line, 9 is a relay, 10 is a contact of relay 9, and 11
are connection parts of connectors between devices, 12 to 16
17 is a connector contact for detecting ground connection on the device side, 18 to 22 is a connector contact for detecting ground connection on the external device side, 23 is a connector contact for ground connection on the external device side, 24 and 25 are connector contacts for signal line connection on the device side, 26 and 2
7 is a connector contact for connecting a signal line on the external device side. Note that the contacts 24, 25 and 26, 27
shows the case of two signal lines, but the number of signal lines may be arbitrary. In this case, the connector contacts on both sides and the contacts of the relay 7 that connects the signal lines should be provided in accordance with the number of signal lines. It will be done.
今、装置側と外部機器側とを接続するため、コ
ネクタ接続部１１を接続すると、アース接続検出
用コネクタ接点１２〜１６，１８〜２２がすべて
接続されたとき、すなわち接点１２―接点１８，
接点１９―接点１３，接点１４―接点２０，接点
２１―接点１５，接点１６―接点２２の接続がす
べてなされたとき、リレー９が駆動されて接点１
０が閉じ、これによつて検出信号がデイレイ回路
２へ送られる。接点１２〜１５および１８〜２１
はそれぞれコネクタの四隅に、接点１６および２
２はコネクタの中央部分に割り当てられており、
これら接点がすべて上述のように接続されたとき
コネクタは確実に接続されたものとみなされ、こ
れによつて同じコネクタ中に設けられたアース接
続用の接点１７―接点２３の接続が保障される。
同時に同じコネクタ中に設けられた接点２４―接
点２６，接点２５―接点２７の接続を介して、信
号線が接続される。接点２４，２５は装置側の信
号線８Ａに接続され、接点２６，２７は外部機器
側の信号線８Ｂに接続されているので、第１図に
示されたリレー６の動作によつて接点７が閉じた
とき、装置内の信号線８は外部機器の信号線８Ｂ
と接続されるが、このときは既に接点１７，２３
を介して両装置間のアース線が接続されているの
で、両装置間のアースレベルの差に基づいてイン
タフエース部における素子の電気的破壊を生じる
ことはない。第２図に示されたアース接続検出回
路では、アース接続検出用リレーの動作のための
接続部をコネクタの各所に散在させたので、アー
ス接続の検出が確実に行われる。なお信号線はコ
ネクタ接続部１１中に収容せず、その接続を別に
行なつてもよいことは、言うまでもない。 Now, when the connector connection part 11 is connected to connect the device side and the external device side, when all the connector contacts 12 to 16, 18 to 22 for earth connection detection are connected, that is, contact 12 - contact 18,
When contacts 19-contacts 13, contacts 14-contacts 20, contacts 21-contacts 15, and contacts 16-contacts 22 are all connected, relay 9 is driven and contact 1
0 is closed, thereby sending a detection signal to the delay circuit 2. Contacts 12-15 and 18-21
have contacts 16 and 2 at the four corners of the connector, respectively.
2 is assigned to the center part of the connector,
When all these contacts are connected as described above, the connector is considered to be securely connected, and this ensures the connection between contacts 17 and 23 for ground connection provided in the same connector. .
At the same time, signal lines are connected through connections between contacts 24 and 26 and between contacts 25 and 27 provided in the same connector. Since the contacts 24 and 25 are connected to the signal line 8A on the device side, and the contacts 26 and 27 are connected to the signal line 8B on the external device side, the contact 7 is connected by the operation of the relay 6 shown in FIG. When closed, the signal line 8 inside the device connects to the signal line 8B of the external device.
However, at this time, contacts 17 and 23 are already connected.
Since the ground wire between both devices is connected through the device, electrical breakdown of elements in the interface section will not occur due to a difference in ground level between the two devices. In the earth connection detection circuit shown in FIG. 2, the connection parts for operating the earth connection detection relay are scattered at various locations on the connector, so that the earth connection can be detected reliably. It goes without saying that the signal line may not be accommodated in the connector connection portion 11 and may be connected separately.
（発明の効果）
以上説明したように、本発明のインタフエース
保護回路によれば、動作中の装置間において信号
線の接続を行なつた場合の、インタフエース部の
素子の電気的破壊を防止することができるので、
常時稼働性を要求される装置において、装置電源
を停止することなく、一方の装置と他方の装置と
を接続することができるので、稼働性を高める上
に極めて効果的である。(Effects of the Invention) As explained above, the interface protection circuit of the present invention prevents electrical breakdown of elements in the interface when signal lines are connected between operating devices. Because you can
In devices that require continuous operation, one device can be connected to the other device without stopping the device power supply, which is extremely effective in increasing operability.
第１図は本発明のインタフエース保護回路の一
実施例の構成を示すブロツク図、第２図は第１図
におけるアース接続検出回路の一構成例を示す回
路図である。
１…アース接続検出回路、２…デイレイ回路、
３，４…デイレイ回路２によつて駆動される接
点、５…アース接続検出時点灯するランプ、６…
信号線の接続を行うリレー、７…リレー６の接
点、８，８Ａ，８Ｂ…信号線、９…アース接続検
出時動作するリレー、１０…リレー９の接点、１
１…装置間におけるコネクタの接続部、１２〜１
７，２４，２５…一方の装置におけるコネクタ接
点、１８〜２３，２６，２７…他方の装置におけ
るコネクタ接点。
FIG. 1 is a block diagram showing the configuration of an embodiment of the interface protection circuit of the present invention, and FIG. 2 is a circuit diagram showing an example of the configuration of the earth connection detection circuit in FIG. 1. 1... Earth connection detection circuit, 2... Delay circuit,
3, 4... Contacts driven by delay circuit 2, 5... Lamps that light up when ground connection is detected, 6...
Relay for connecting the signal line, 7... Contact of relay 6, 8, 8A, 8B... Signal line, 9... Relay that operates when ground connection is detected, 10... Contact of relay 9, 1
1... Connection part of connector between devices, 12-1
7, 24, 25... Connector contacts in one device, 18-23, 26, 27... Connector contacts in the other device.
Claims (1)
うことが要求される装置のインタフエース部にお
いて、装置間におけるアース線が接続されたこと
を検出して検出信号を発生するアース接続検出回
路と、該検出信号の発生によつて動作して装置間
における信号線を接続するリレーとを具え、装置
間のアース線が接続された後に装置間の信号線を
接続することを特徴とするインタフエース保護回
路。1. A ground connection that detects the connection of the ground wire between devices and generates a detection signal in the interface section of the device that requires connection of signal lines with other devices during operation. It is characterized by comprising a detection circuit and a relay that is activated by the generation of the detection signal to connect signal lines between the devices, and connects the signal lines between the devices after the ground wires between the devices are connected. interface protection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57051724A JPS58168125A (en) | 1982-03-29 | 1982-03-29 | Interface protecting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57051724A JPS58168125A (en) | 1982-03-29 | 1982-03-29 | Interface protecting circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58168125A JPS58168125A (en) | 1983-10-04 |
| JPS6220575B2 true JPS6220575B2 (en) | 1987-05-07 |
Family
ID=12894829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57051724A Granted JPS58168125A (en) | 1982-03-29 | 1982-03-29 | Interface protecting circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58168125A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63136547U (en) * | 1987-02-25 | 1988-09-08 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113608606A (en) * | 2021-07-23 | 2021-11-05 | 深圳海翼智新科技有限公司 | Interface circuit and network camera |
-
1982
- 1982-03-29 JP JP57051724A patent/JPS58168125A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63136547U (en) * | 1987-02-25 | 1988-09-08 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58168125A (en) | 1983-10-04 |
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