KR19980061372U - Redundant communication line control device - Google Patents

Abstract

The present invention relates to a duplex communication line control apparatus capable of appropriately controlling a duplex communication line to communicate without regard to the number of serial ports, A second line connection unit, a control unit for sensing whether data is transmitted through the first and second line connection units and outputting a predetermined control signal to the first or second relay, An interlock unit for turning on the relay contacts and outputting the power supply, a third or fourth relay connected to the interlock unit according to the power supplied through the interlock unit, and turning on any one of the plurality of relay contacts, The first and second switching units can be widely used and the reliability can be improved.

Description

Redundant communication line control device

The present invention relates to a communication line control apparatus, and more particularly, to a duplicated communication line control apparatus for controlling a redundant communication line.

1, the main control apparatus 10 and the remote control apparatus 20 are connected to each other through respective communication lines and the modems 30 and 31 to the serial port 21 ) 22 to exchange various data. At this time, when the main controller 20 transmits data to the modem 30, the modem 30 processes the input data and inputs the data to the auxiliary controller 20 through the serial port 21. When the main control device 10 is performing data communication with the auxiliary control device 20 using the modem 30, data communication can not be performed through the other modem 31 and communication via the modem 31 The communication is performed using the 1: 1 communication method which can not communicate through the modem 30. At this time, if an error occurs in the communication line being used during the communication, the communication is resumed by using another communication line that is not currently used. When a communication network is constructed using a plurality of independent communication lines and an error occurs in the communication line in use, the communication line is replaced with another communication line. Accordingly, in order to exchange data with a conventional apparatus using a plurality of communication lines, a number of serial ports equal to the number of communication lines must be provided.

According to the related art, when a communication line is duplicated, there is a problem that communication can not be performed with a device having a single serial port.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above problems, and it is an object of the present invention to provide a duplicated communication line control device capable of appropriately controlling duplicated communication lines to communicate regardless of the number of serial ports.

1 is a block diagram showing a duplicated communication line control apparatus according to the prior art;

2 is a block diagram showing a duplicated communication line control apparatus according to the present invention,

3 is a circuit diagram showing the detailed configuration of FIG.

Description of the Related Art [0002]

10: main controller 20, 40: auxiliary controller

21, 22, 41: serial port 30, 31, 50: modem

61: first line connecting portion 62: second line connecting portion

63: control unit 64: first switching unit

65: second switching unit 66: interlock unit

71: CPU I ₁ , I ₂ , I ₃ , I ₄ : Inverter

T ₁ , T ₂ , T ₃ , T ₄ : Trans A ₁ , A ₂ : OP amp

PC ₁ , PC ₂ : first and second photocouplers

MRY1, MRY2, MRY3, MRY4: First to fourth relay excitation coils

RY _1a , RY _2a , RY _3a1 , RY _3a2, RY _4a1, RY _4a2 : First to sixth relays a contact

RY _1b , RY _2b : first and second relay b contacts

According to an aspect of the present invention, there is provided a communication apparatus including first and second line connection units for transmitting predetermined data through a communication line of a plurality of communication lines, and a control unit for sensing whether data is transmitted through the first and second line connection units, An interlock unit for turning on a plurality of relay contacts alternately connected in accordance with a control signal of the control unit and outputting a power supply voltage; and an interlock unit connected to the interlock unit according to the power supplied through the interlock unit, And the first and second switching units driving the third or fourth relay and turning on any one of the plurality of relay contacts to connect the modem and the communication line.

Hereinafter, a duplicated communication line control apparatus according to the present invention will be described with reference to the accompanying drawings.

FIG. 2 is a block diagram showing a duplicated communication line control apparatus according to the present invention, and FIG. 3 is a circuit diagram showing a detailed configuration of FIG.

As shown in FIGS. 2 and 3, the duplicated communication line control apparatus according to the present invention receives data transmitted from the main control apparatus 10 and the main control apparatus 10 through a serial port 41 to perform a control operation A modem 50 for processing various signals to enable bidirectional communication of data transmitted from the main control device 10 to the main control device 10 from the auxiliary control device 40 or the auxiliary control device 40 First and second line connecting parts 61 and 62 for connecting the data transmitted through one of the two transmission paths in the main control device 10, a first line connecting part 61 or a second line connecting part 61, A control unit 63 for detecting whether or not data is inputted to the first line connecting unit 62 or the second line connecting unit 62 according to the signal outputted from the control unit 63, The data input through the modem 50 is input to the modem 50, First and second switching units 64 and 65 for connecting or disconnecting the adjacent component 61 or the second line connecting unit 62 and the modem 50 respectively; And interlocking the first and second switching units 64 and 65 so as not to connect the first line connecting unit 61 and the second line connecting unit 62 to the modem 50 at the same time, (66). At this time, the first line connection unit 61 and the second line connection unit 62 are constituted by a transformer T ₁ (T ₂ ) in order to minimize noise during data transmission. Then, the controller 63 comprises a transformer _{(T 3) (T 4)} , trans (T ₃ for the first line connection portion 61 or the second line receiving is to minimize the noise of each of the data transmitted via connection 62 ) (inverter for reversing the output of the OP amplifier (a ₁₎ (a _2), OP amplifiers (a ₁₎ (a ₂₎ for generating a square wave of a predetermined level according to the applied data through T ₄₎ (I ₃₎ it consists of (I ₄₎ and an inverter _{(I 3) (CPU (71} ) being applied to the output of the I ₄₎ to detect an input, and whether the data path for outputting a signal corresponding thereto and the like. The first switching unit 64 is composed of a third relay excitation coil MRY3 and third and fourth relay a contacts RY _3a1 and RY _3a2 which operate in conjunction with the third relay excitation coil MRY3. the relay is composed of four exciting coils (MRY4) and in connection with operating the fifth and sixth contact a relay (RY _4a1) (RY _4a2) to. And the interlocking portion 66 includes first and second photo coupler (PC ₁₎ (PC _2), first and second photo coupler (PC ₁₎ of claim 1 in which each woman according to 0g turned 0h operation (PC ₂₎ First and second relay a contacts RY _1a and RY _{2a that} operate in conjunction with the first and second relay excitation coils MRY1 and MRY2 and the first and second relay excitation coils MRY1 and MRY2, And a second relay b contact RY _1b (RY _2b ).

The operation of the redundant communication line control apparatus configured as described above is as follows.

First, when the main controller 10 transmits data through the first line connection unit 61, the data transmitted through the first line connection unit 61 is transferred to the transformer T ₃ of the control unit 63, the OP A ₁ and is inverted by the inverter I ₃ and input to the CPU 71. [ Accordingly, the CPU 71 senses that the data is input to the first line connection unit 61 and outputs a 0g low 0h signal in the C ₁ stage in order to connect the first line connection unit 61 and the modem 50 _. Next it is a first photo coupler (PC _1), the 0g on 0h operate the first relay exciting coil (MRY1) woman being in connection with operating the first relay contact b (RY _1b) is 0g off to 0g of the interlock unit 66 The first relay a contact (RY _1a ) becomes 0g on 0h. The third relay excitation coil MRY3 of the first switching unit 64 is connected to the first relay a contact RY _1a of the 0g on 0h state and the second relay b contact RY of the second photo coupler PC _{2 2b} to receive the + 12v operating voltage. Since the third and fourth relay contacts a RY _3a1 and RY _3a2 operating in conjunction with the third relay excitation coil MRY3 are 0 _g on 0h, the first line connection unit 61 is connected to the modem 50, The data output from the device 10 is input to the auxiliary control device 40 via the modem 50. [ Subsequently, the auxiliary control device 40 appropriately performs a control operation in accordance with the input data. At this time, when the interlock unit 66, a first photo coupler (PC _1), the 0g turned on is 0h first relay contact b (RY _1b) is 0g off 0h of this one end is connected to the second of the second photo coupler (PC ₂₎ side The operation power supplied to the relay a contact RY _2a is cut off. Accordingly, the second photo coupler (PC ₂₎ is 0g turned 0h second switching unit 65, the fourth relay woman is let be woman is cut off power supply to the coil (MRY4) and in the end, a first line connection portion (61) of said doedeo And the second line connecting portion 62 are prevented from being connected to the modem 50 at the same time.

When the main control apparatus 10 transmits data through the second line connection unit 62, the control unit 63 controls the second line connection unit 62 as in the case of transmitting data through the first line connection unit 61 And outputs a 0g low 0h signal through the C ₂ stage _. Thus, since the interlocking portion 66 the second photo coupler (PC ₂₎ is 0g turned 0h of the second relay exciting coil (MRY2) a woman being in connection with operating the second relay contact b (RY _2b) is 0g off 0h is that the 2 Relay a contact (RY _2a ) turns on 0h. Then, because the second switching unit 65, the fourth relay exciting coil (MRY4) is women received power is supplied in connection with operating the fifth and sixth relay contact a (RY _4a1) (RY _4a2) is 0g on 0h that of the Line connection unit 62 is connected to the modem 50 so that the data output from the main control unit 10 is input to the auxiliary control unit 40 through the modem 50 and the auxiliary control unit 40 controls And performs an operation. At this time, when the second relay b contact RY _2b is 0g off 0h, the operation power supplied to the first relay a contact RY _1a on the first photo coupler PC ₁ side is cut off, The third relay excitation coil MRY3 of the second relay excitation coil 64 is not excited so that an interlock operation is performed to prevent the first line connection portion 61 and the second connection portion 62 from being connected to the modem 50 at the same time.

The duplicated communication line control apparatus according to the present invention has the following effects.

First, since the duplicated communication lines are properly controlled so as not to be mixed with each other, communication can be performed irrespective of the number of serial ports, so that the present invention can be widely applied to various communication apparatuses.

Second, reliability can be improved by including an element for reducing errors due to communication noise and the like.

Claims (4)

First and second line connecting portions for transmitting predetermined data through any one of a plurality of communication lines; A controller for sensing whether the data is transmitted through the first and second line connection units and outputting a predetermined control signal to the first or second relay; An interlock unit for turning on a plurality of relay contacts alternately connected in accordance with a control signal of the control unit to output a power supply; And And a first and a second switching unit for driving the third or fourth relay connected to the interlock unit according to the power supplied through the interlock unit and for turning on any one of the plurality of relay contacts to connect the modem and the communication line. And a redundant communication line control unit. The method according to claim 1, Wherein the first and second line connections are transmission trunks connected in parallel to a communication line. The method according to claim 1, The interlock includes a plurality of relay drivers including a photocoupler, And a plurality of relay contacts alternately connected to be turned on by the relay driver. The method of claim 3, And an output terminal of the interlock unit is connected to input terminals of the first and second switching units, respectively.