JPS5834642A - Automatic circuit lead-in system - Google Patents

Abstract

PURPOSE:To obtain a system simple in relay controlling program and high in reliability against a trouble for the contact point without using a special jack, etc., by operating a relay for circuit change-over and a relay securing for instantaneous breakdown in a specified sequence. CONSTITUTION:When a controlling signal SEL (Fig. a) based on a program is given, a relay E operates (Fig. b) and a relay T is operated by closing of the contact e1 of the relay E, and returns to the original condition when the controlling signal SEL is restored (Fig. c). A relay C is operated and restored (Fig. d) according to make and break of the contact e2 of the relay E. A relay S is operated by the controlling signal SEL, and held (Fig. e) by a power source +V when the relay C is operated. Accordingly, switching of contacts S0-S3 for circuit change-over is performed under a state that a level converter 11 and an outgoing circuit 14, and an incoming circuit 15 and a level converter 12 are short-circuited by contacts t0, t1 securing for instantaneous break.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic line lead-in method that allows signals from a human line to be drawn into a line testing device without momentary interruption.

When connecting line signals to line testing equipment to monitor line traffic or test lines,
It is necessary to be able to perform retraction without momentary interruption. Conventionally, when connecting such a line, the most common method was to manually connect the line to a testing device using a jack.

FIG. 1 illustrates a line installation method using a jack. In the figure, reference numeral 1 denotes a level conversion circuit belonging to a line termination device, to which a plurality of lines 2 are connected. Reference numeral 3 denotes a jack board, which includes a large number of jacks 5 corresponding to the lines 2 and connection lines to the line testing device 4. 6 is a cord equipped with plugs 7.7A at both ends, and by inserting the plugs 7.7A into jacks corresponding to the line to be tested and the channel of the line testing equipment,
It is possible to connect any line to the line testing equipment. At this time, no instantaneous interruption can be achieved by making the contact structure of the jack a special structure that disconnects the line after the connection on the plug side is completed.

The plug-in method using a jack requires a jack with a special contact configuration as described above, and also relies on human labor, so it requires skill to ensure that the line to be plugged in corresponds to the channel. For this reason, a method 5 is used in which a line installation device is provided externally and automatic installation is performed using a software.

FIG. 2 shows the configuration of a conventional automatic retraction system. In the figure, 10 indicates a line termination device.

11 and 12 are level converters on the output side and input side, respectively, and only one line is representatively shown.

Reference numeral 15 indicates a line lead-in device, and numerals 14 and 15 indicate an outgoing line and an incoming line that have passed through the eye movement lead-in device, respectively. Reference numerals 16, 17, 18, and 19 are drop-in lines to a line testing device (not shown), with drop-in lines 16 and 17 corresponding to outgoing lines, and drop-in lines 18 and 19 corresponding to incoming lines.

In the line installation device 15, the PA, 8. PB, X.

Relays T are each supplied with power from the power supply +V, relays FA and PB operate according to control signals aS, MK, and MK based on programs, respectively, and relays S operate according to control signals N and relays based on programs. PA contact point p
It operates under the control of i.

Relay X operates under the control of contact pb of relay FB, and relay T operates under control of contact X of relay-X.

Contacts l. and Hatake 1 are transfer contacts of the relay 8, and contacts 1 and e'1 each have a common contact as a level converter 11. While being connected to the outgoing line 14,
The respective break contacts are short-circuited and the make contacts are respectively connected to drop-in lines 16,17. The contact point t is the break contact of the tree T, and the constant contact point S., $,
The common contacts of the T-T are short-circuited and opened when the T-T is operated. Contact @1*”a is also a transfer contact of relay 8, and contacts 1 and 1 have their common contacts connected to the level converter 12° input line 15, and their respective break contacts. The make contacts are connected to lead-in wires 18 and 19, respectively. Contact 1. is also a break contact of relay T, and is a constant contact "m".
Short-circuit the common contacts of eSl and open when relay T is activated.

FIG. 5 shows the operation of each relay in the automatic retracting method shown in FIG. In the same figure, (al indicates the control signal, Φ1, (C) respectively the relay PA,
8 is shown. (d) shows the control signal M, (
e) t (f) e (g) are respectively relay FB,
It shows the operation of X and T.

Now, when a control signal is given from the program as shown in Figure 5 (-), the relay FA operates as shown in HS diagram (b) K in response to it, and further as a result of this, as shown in iJS diagram (C). Relay 8 is activated, the contact line 1*"ls'j is praised, and the outgoing line and incoming line are drawn into the line testing equipment via drop-in lines 16.17 and 18.1, respectively. Next, from the program, select Figure 5 (dl
When a control signal M is given as shown in FIG. 6(e), relay PB operates as shown in FIG. When T is shown in Figure 3 (trout), the contacts t,

tl is released. In this way, the automatic connection method shown in FIG. 2 allows the line to be connected to the line testing equipment without any interruption. Note that the relay 8 is actually provided for each line, and depending on which line is to be connected, the control signal N corresponding to the relay of that line is selectively given from the program. In the second wJ, only one line of the °-tree 8 and the control signal N is representatively shown.

However, in the automatic retracting method shown in FIG. As is clear from the time chart in Figure 5, relay T operates after relay S completes its operation.
A timing relationship must be given for recovery before the relay 8 is restored, which makes the program complex. Also, the contacts 'le'l and 'l#'a are
Due to the structure, they are inserted in series with the output line and the input line, so if even one contact fails, the line side will be disconnected, resulting in low reliability.

The present invention attempts to eliminate these five disadvantages of the prior art, and its purpose is to perform automatic retraction without the need for manpower, without using a jack or the like that requires a special contact configuration. To provide an automatic line lead-in system which is capable of controlling a line lead-in relay, has a simple program necessary for controlling a line lead-in relay, and has high reliability against faults in the contacts of the line lead-in relay.

In the automatic line lead-in method of the present invention, in each line, a common contact is connected between the level conversion circuit and the line, respectively, and the line is normally connected to the level conversion circuit through each break contact. There are two sets of transfer contacts that connect the line and, during operation, connect the level conversion circuit and the line to the line testing equipment through their respective make contacts, and a break that constantly shorts the common contacts of the two sets of transfer contacts. By providing a contact and controlling the relay so that the relay that operates the transfer contact operates before the relay that operates the break contact and recovers later, it is possible to automatically retract without momentary interruption.

Hereinafter, the present invention will be described in detail with reference to Examples.

FIG. 4 shows the configuration of an embodiment of the automatic line lead-in system of the present invention. In this figure, the same parts as in FIG. 2 are indicated by the same numbers, and C9T and J8 are relays. Relay E operates according to control signal 81 based on the program, and relay T operates when the contact point of relay E becomes connected when control signal 8FtL is given, and is restored by return 1t3 of control signal 8EL. do. The tree C is operated by the power supply +■ by the contact e3 of the tree E becoming connected, and is restored by the restoration of the contact .

Relay 8 is selected by control signal N and control signal 8B
It is first activated by the relay L, and is maintained by the power supply +VK through the contact C by the operation of the relay C, and is restored by the restoration of the relay C. Reference numeral 20 denotes a line termination device, and in the case of FIG. 4, a level conversion circuit, a line lead-in channel, and a circuit for controlling the line connection are provided in the line termination device 20 all at once.

As in the case of Fig. 2, the relay 8 is actually provided for each line, and depending on which line is to be connected, a control signal is given from the program to select the relay for that line. do.

In FIG. 4, only one line of the relay 8 and the control signal N is representatively shown.

Contact S・-3 is a transfer contact of relay S,
ls'l connects the respective common contacts to the level converter 11 and the output line 14, and connects the respective break contacts to the output line 14 and the level converter 1.
1i111, and the respective make contacts are connected to the recesses 16 and 17. The contact to is the break contact of the tree T, and is always the contact 1・e'
The common contacts of T are short-circuited, and the relay T is opened when it is activated.

Contacts - and sl are also transfer contacts of relay S, and contact G e "1 connects their common contacts to level conversion 1112 and input line 15, and connects their respective break contacts to input line 15 and level The contacts t, 4 are connected to the converter 12, and are further connected to the respective make contacts, lead-in wires 18 and 19.
) 9-ray T break contact, constant contact 1,
, Il are short-circuited, and the number of the tree T is opened during operation.

FIG. 5 explains the operation of each relay in the line termination device shown in FIG. 4. In the same figure, (a) H
shows the control signal 8EI, (b), (c) * (
d) and (e) C show the operations of the wires E, T, C, and 8, respectively.

Now, when a control signal SEL is given from the program as shown in FIG.
It works as shown in (a). Relay T operates when the contact point of relay E becomes connected, and the control signal 81i1
When L is restored, it will be returned one day later (Fig. 5 (C)).

The relay C operates and recovers according to the connection and disconnection of the contact point ① of the relay E (FIG. 5(d)). The relay 8 is first operated by the control signal 8BL, and after the operation of the relay C, it is held by the power supply +V, and is restored when the relay d is restored (FIG. 5 (@)).

As is clear from the time chart in Figure 5, relay T
is activated after relay 8 is activated, and relay 8 is restored after relay T is restored. Therefore, the contact point S@.

Switching of "1v" and "a" is performed in a state where the level converter 11 and the 14 outgoing lines and the inlet line 15 and the level converter 12 are short-circuited by the contact j@ell, respectively, and the incoming lines 16 and 17 are short-circuited. Since the contact '@w'l is opened after the lead-in connection to 18.1?

In the automatic line lead-in method of the present invention, as described above,
a relay with 5 transfer contacts for switching the m-line;
A relay having a break contact for instantaneous interruption protection is configured to operate at a constant rate, and control from the program is performed only by a control signal 811L. Therefore, according to the automatic line connection system of the present invention, the software for performing line connection becomes simple. In addition, each of the two sets of transfer contacts connected between the level converter and the output or input line becomes a double contact for the line when inactive, so even if one contact fails, the line will be disconnected. Since the reliability is not

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram showing a line connection system using a jack, Figure 2 is a diagram showing the configuration of a conventional automatic connection system, and Figure 5
The figure is a time chart showing the operation of each tree in the automatic line lead-in system shown in Figure 2, Figure 4 is a diagram showing the configuration of an embodiment of the automatic line lead-in system of the present invention, and Figure 5 is a time chart showing the operation of each tree in the automatic line lead-in system shown in Figure 4. This is a time chart showing the operation of each tree in the pull-in method. DESCRIPTION OF SYMBOLS 1... Level conversion circuit, 2... Line, 3... Jack panel, 4... Line testing device, 5... Jack, 6
... Cord, 7,7A... Plug, 10... Line termination device, 11゜12... Level converter, 13...
Line inlet device, 14... Outgoing line, 15... Incoming line, 16, 17, 18. 19... Incoming line, 20... Line termination device, PA, 8. FB, X. T, C, T, B, -Tre- Patent applicant Fujitsu Limited agent Patent attorney Gobe Tamamushi (3 others)

Claims (1)

[Claims] In the automatic line lead-in method that draws the outgoing line and incoming line from the level conversion circuit to the line test equipment without momentary interruption, the common contacts are connected to the level conversion circuit and the line, and the break contacts are connected to the line and the level conversion circuit, respectively. 211 transfer contacts each having a make contact connected to the lead-in line for the line testing device are provided for each line between the level change *a path and the line, and the common contacts of the two sets of transfer contacts are constantly shorted. An automatic line lead-in system characterized by providing break contacts and controlling the relay so that the relay that operates the transfer contact operates before the relay that operates the break contact and recovers later.