JP2564152Y2 - Multi-distributor - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-distribution device having a redundant function of distributing one signal in various ways.

[0002]

2. Description of the Related Art FIG. 7 is a block diagram of a conventional multi-distribution apparatus having a redundant function. In the figure, 1 is an input terminal connected to the outside for inputting a signal, 2a to 2c are input circuits for receiving an input signal, and 3a to 3c are output circuits of the input circuits 2a to 2c when an open failure occurs. Pull-up resistor to force output to high level, 4a-4c
Are open collector NAND circuits for inputting signals output from the input circuits 2a to 2c of the respective systems and the input circuits 2a to 2c of the adjacent system, and 5 is an output of the open collector NAND circuits 4a to 4c not at a low level. In other words,
When the output is open, a pull-up resistor for raising to a high level, 6a to 6d are output circuits for outputting multi-divided signals to the outside, and 7a to 7d are output circuits 6a to 6d.
This is an output terminal connected to the outside in order to output the signal outputted from the outside to the outside.

Next, the operation will be described. An external signal is input to the input circuits 2a to 2c via the input terminal 1. The input circuits 2a to 2c are connected to the open collector NAND circuits 4a to 4c of the respective systems and the open collector NAND circuits of the adjacent systems. This signal is transmitted to the circuits 4a to 4c. If all the input circuits 2a to 2c are normal,
Normal signals are transmitted to all open collector NAND circuits 4a-4c, and these open collector NAND circuits 4a-4c also output normal signals to all output circuits 6a-6.
d, and all output circuits 6a to 6d also transmit normal signals to all output terminals 7a to 7d.

On the other hand, for example, when the input circuit 2a fails and the output becomes open, the input circuit 2a
Are used to output normal signals to the open collector NAND circuits 4a and 4
I can't tell c. However, pull-up resistor 3
a, the output of the input circuit 2a is raised to a high level, so that the open collector NAND circuits 4a, 4c
High level is also transmitted. Therefore, the open collector NAND circuit 4a can output a normal signal from the input circuit 2b, and similarly, the open collector NAND circuit 4c can output a normal signal from the input circuit 2c. Since the open-collector NAND circuit 4b to which only a normal signal is input also outputs a normal signal, a normal signal can be transmitted to all the output circuits 6a to 6d, and all the output circuits 6a to 6d also A normal signal can be transmitted to all the output terminals 7a to 7d. Therefore, even if one of the input circuits 2a to 2c fails, a normal signal can be transmitted to all output terminals by the above-described redundancy function.

[0005]

Since the conventional multi-distribution device with a redundant function is constructed as described above, even if one of the input circuits 2a to 2c fails, a normal signal is output to the output terminal. Is transmitted, it cannot be known from the outside that there is a faulty circuit in the input circuits 2a to 2c.

The present invention has been made to solve the above-mentioned problem, and a multi-distribution function with a redundant function which can externally determine whether or not a faulty circuit exists in the input circuits 2a to 2c. The aim is to get the device.

[0007]

A multi-distribution apparatus with a redundancy function according to the present invention connects the outputs of all input circuits to a redundancy function confirmation all-one detection circuit and a redundancy function confirmation all-zero detection circuit. The output of the confirmation all 1 detection circuit and the output of the redundancy function confirmation all 0 detection circuit are connected to a redundancy function confirmation OR circuit, and the output of the redundancy function confirmation OR circuit is connected to the redundancy function confirmation output terminal. .

[0008]

The redundant function confirmation all 1 detection circuit outputs 1 when the output of the input circuit is all 1, and the redundancy function confirmation all 0 detection circuit outputs 1 when the output of the input circuit is all 0. Therefore, if all the input circuits are normal, the redundant function confirmation OR circuit always outputs 1 regardless of whether the input signal at the input terminal is 1 or 0. However, when there is a faulty circuit in the input circuit, the output of the faulty input circuit is 0 even if the input signal is 1.
Or the input signal is 0 or 1 so that a signal different from the output of other normal input circuits is output. Therefore, since the redundant function confirmation all 1 detection circuit or the redundant function confirmation all 0 detection circuit does not output 1, the redundant function confirmation OR circuit does not output 1 in some cases.
Therefore, when a failure occurs in the input circuit, the signal output to the redundant function check output terminal is not always 1.

[0009]

[Embodiment 1] FIG. 1 is a configuration diagram showing an embodiment of the present invention. In the figure, 1 is an input terminal connected to the outside for inputting a signal, 2a to 2c are input circuits for receiving an input signal, and 3a to 3c are output circuits of the input circuits 2a to 2c when an open failure occurs. The pull-up resistors 4a to 4c for forcibly setting the output to the high level are open collector NANDs for inputting signals output from the input circuits 2a to 2c of the respective systems and the input circuits 4a to 4c of the adjacent system. The circuit 5,
When the outputs of the open collector NAND circuits 4a to 4c are not at the low level, that is, when the output is open, the pull-up resistors for raising to the high level, 6a to 6d are:
Output circuits for outputting multi-divided signals to the outside, 7a to 7
d is an output terminal connected to the outside for outputting signals output from the output circuits 6a to 6d to the outside, and 8 is an input terminal connected to all the outputs of the input circuits 2a to 2c.
2c is a redundant function confirmation all 1 detection circuit that outputs 1 in the case of all 1s of the signals output from the input circuit 2a.
2c are connected and all the signals output from the input circuits 2a to 2c are 0, and the redundant function confirmation all 0 detection circuit outputs 1 when all the signals output are 0.
The detection circuit 8 and the output of the redundant function check all 0 detection circuit 9 are connected, and when both or either of these output signals is 1, the redundant function check OR circuit which outputs 1 when the output signal is 1,
Reference numeral 1 denotes a redundant function confirmation output terminal connected to the outside to output a signal output from the redundant function confirmation OR circuit 10 to the outside.

The operation of the multi-distribution apparatus with the redundant function confirmation constructed as described above will be described. External signals
The input circuits 2a to 2c are input to the input circuits 2a to 2c via the input terminal 1. The input circuits 2a to 2c are connected to the open collector NAND circuits 4a to 4c of the respective systems and the open collector NAND circuits 4a to 4c of the adjacent system. The signal is transmitted to the redundant function confirmation all 1 detection circuit 8 and the redundancy function confirmation all 0 detection circuit 9. All input circuits 2a
2c is normal, a normal signal is transmitted to all open collector NAND circuits 4a to 4c, and these open collector NAND circuits 4a to 4c also transmit normal signals to all output circuits 6a to 6d, All output circuits 6a to 6d also transmit normal signals to all output terminals 7a to 7d. Since a normal signal is also transmitted to the redundant function confirmation all 1 detection circuit 8 and the redundancy function confirmation all 0 detection circuit 9, when the input signal is 1, the outputs of the input circuits 2a to 2c are all 1 and the The function confirmation all 1 detection circuit 8 outputs 1 and the redundant function confirmation all 0 detection circuit 9 outputs 0.
The redundant function confirmation OR circuit 10 outputs 1 to the redundant function confirmation output terminal 11. When the input signal is 0
In this case, the outputs of the input circuits 2a to 2c are all 0, so that the redundant function check all 1 detection circuit 8 outputs 0, but the redundant function check all 0 detection circuit 9 outputs 1, so the redundant function check The OR circuit 10 also outputs 1 to the redundant function confirmation output terminal 11. Therefore, the input circuit 2a
When all of .about.2c are normal, 1 is always output to the redundant function check output terminal 11.

On the other hand, for example, when the input circuit 2a fails and the output becomes open, the input circuit 2a
Are used to output normal signals to the open collector NAND circuits 4a and 4
I can't tell c. However, pull-up resistor 3
a, the output of the input circuit 2a is raised to a high level, so that the open collector NAND circuits 4a, 4c
High level is also transmitted. Therefore, the open collector NAND circuit 4a can output a normal signal from the input circuit 2b, and similarly, the open collector NAND circuit 4c can output a normal signal from the input circuit 2c. Since the open-collector NAND circuit 4b to which only a normal signal is input also outputs a normal signal, a normal signal can be transmitted to all the output circuits 6a to 6d, and all the output circuits 6a to 6d also A normal signal can be transmitted to all the output terminals 7a to 7d. When the input signal is 1, the output of the failed input circuit 2a is forcibly pulled up to a high level, so that it is also 1, so that all of the input circuits 2a to
The output of 2c becomes 1, and the redundant function confirmation all-ones detection circuit 8 outputs 1, so that the redundant function confirmation OR circuit 10 also outputs 1 to the redundant function confirmation output terminal 11. However, when the input signal is 0, the output of the failed input circuit 2a is forcibly raised to a high level, so that 1 is output, and the normal input circuits 2b to 2c output 0. Therefore, both the redundant function confirmation all 1 detection circuit 8 and the redundant function confirmation all 0 detection circuit 9 output 0. Therefore, the redundant function confirmation OR circuit 10 also outputs 0 to the redundant function confirmation output terminal 11.

When the input circuit 2a breaks down and outputs only a low level, the low level is transmitted to the open collector NAND circuits 4a and 4c, so that the outputs of the open collector NAND circuits 4a and 4c are output. Becomes open. However, since a normal signal is transmitted from the normal input circuits 2b and 2c to the open collector NAND circuit 4b, the open collector NAND circuit 4b can output a normal signal. Since the outputs of the open collector NAND circuits 4a and 4c are open, a normal signal can be transmitted to all the output circuits 6a to 6d, and therefore, all the output circuits 6a to 6d
Can transmit a normal signal to all the output terminals 7a to 7d. When the input signal is 1, the output of the failed input circuit 2a becomes low level,
Since the normal input circuits 2b to 2c output 1, both the redundant function check all 1 detection circuit 8 and the redundant function check all 0 detection circuit 9 output 0. Therefore, the redundant function confirmation OR circuit 10 also outputs 0 to the redundant function confirmation output terminal 11. When the input signal is 0, the output of the failed input circuit 2a becomes low level, that is, 0, because of the failure, and the normal input circuits 2b-2
Since c also outputs 0, the redundant function confirmation all 0 detection circuit 9 outputs 1, and thus the redundant function confirmation OR circuit 10 also outputs 1 to the redundant function confirmation output terminal 11.

As described above, all the input circuits 2a to 2a
When c is normal, 1 is always output to the redundant function check output terminal 11, but when there is a failure in the input circuits 2a to 2c, the output of the redundant function check output terminal 11 is not always 1. Therefore, it can be known from the outside whether or not any of the input circuits 2a to 2c has a faulty circuit.

Embodiment 2 FIG. Next, as shown in FIG. 2, a redundant function confirmation open collector NAND output circuit 12 is provided at the output of the redundancy function confirmation OR circuit 10,
A redundancy function confirmation lower voltage dividing resistor 13 connected in series to the output of the redundancy function confirmation open collector output circuit 12;
Redundant function check upper voltage divider 14 connected to the redundant function check lower voltage divider 13 on the opposite side of the redundant function open collector output circuit 12, redundant function check lower voltage divider 13 and redundant function check A description will be given of a case where the input terminal 1 is provided which also shares the redundant function confirmation output terminal 11 to which the connection part of the upper voltage dividing resistor 14 is connected in common. In this case, if there is no failure in the input circuits 2a to 2c, the redundant function check OR circuit 10 outputs 1, so the redundant function check open collector output circuit 12 outputs an open signal to check the redundant function. Since the high-level voltage dividing resistor 14 raises the level to a high level, a high level is output to the redundant function check output terminal 11. Also, the input circuits 2a to 2
If there is a failure in the circuit c, the redundant function confirmation OR circuit 1
Since 0 outputs 0, the output of the redundant function confirmation open collector output circuit 12 becomes low level, but the redundant function confirmation lower voltage dividing resistor 13 and the redundant function confirmation upper voltage dividing resistor 1
4, the divided voltage 27 of FIG. 6 is output to the redundant function check output terminal 11. Therefore, the input signal 1 shown in FIG. 6 appears at the input terminal 1 sharing the redundant function confirmation output terminal 11 with the input signal 20 shown in FIG. An output signal 23 appears when the input circuit fails. Here, redundancy with multi-dispensing device internal delay time 24 is the time close to Oyo its 0. Therefore, by observing these signal waveforms, it is possible to know whether or not the input circuits 2a to 2c are out of order, and at the same time, it is possible to reduce the number of connection terminals with the outside.

Embodiment 3 FIG. Next, as shown in FIG. 3, a delay circuit 19 is connected between the redundant function confirmation OR circuit 10 and the redundant function confirmation open collector output circuit 12.
A description will be given of a case in which is provided. The delay time 25 of the redundant function check system shown in FIG. 6 is obtained by adding the delay time of each circuit, but becomes very short due to the variation.
In some cases, the waveforms of the input signal failure output signal 22 and the input circuit failure output signal 23 cannot be sufficiently observed. However,
Since the delay time 25 of the redundant function check system can be made sufficiently long by the delay circuit 19, the waveform can be clearly observed, and it can be surely known whether or not the input circuits 2a to 2c are out of order. The effect is obtained.

Embodiment 4 FIG. Next, a case will be described in which an output terminal 7d sharing the redundant function confirmation output terminal 11 is provided as shown in FIG. When the redundant function confirmation output terminal 11 is shared by the input terminals 1 and all the input circuits 2a to 2
c, and thus affects the signals output from all the output terminals 7a to 7d. However, if the output terminal 7d shares the redundant function confirmation output terminal 11, the redundant function confirmation output terminal 11 The failure of the system affects only the output terminal 7d, and an effect that a normal signal can be continuously output from the other output terminals 7a to 7c is obtained.

Embodiment 5 FIG. Next, as shown in FIG.
18d will be described. If the output circuits are not the open collector output circuits 18a to 18d, the redundancy function check output terminal 1
In the waveform of the output signal of No. 1, the power supply voltage 26 and the divided voltage 27 in FIG. 6 may not be clear, but in the case of the open collector output circuits 18a to 18d, since there is no internal resistance of the output section, Since the power supply voltage 26 and the divided voltage 27 are determined by the redundant function confirming lower voltage dividing resistor 13 and the redundant function confirming upper voltage dividing resistor 14, waveforms can be clearly observed, and whether the input circuits 2a to 2c are faulty. This has the effect that it is possible to know whether or not it is certain.

Embodiment 6 FIG. Further, in the above embodiment, three input circuits 2a to 2c have been described, but the same effect can be obtained in the case of an arbitrary number of three or more.

Embodiment 7 FIG. In the above embodiment, the output circuits 6a to 6d, the open collector output circuits 18a to 18d, and the four output terminals 7a to 7d have been described. However, the same effect can be obtained in an arbitrary number.

Embodiment 8 FIG. In the above embodiment, the open collector NAND circuit 4
As described in a to 4c, the same effect can be obtained in the case of an open collector OR circuit instead of the open collector NAND circuit.

Embodiment 9 FIG. In the above embodiment, the failure of the input circuit 2a has been described. However, the same applies to the case where the other input circuits 2a to 2c fail or the case where the wiring before and after the input circuits 2a to 2c fails. The effect is obtained.

Embodiment 10 FIG. In the above embodiment, the high level is 1 and the low level is 0, but the high level is 0 and the low level is 1.
The same effect can be obtained when

Embodiment 11 FIG. Further, in the above embodiment, the redundant function confirmation output terminal 11 has been described as being shared by the output terminal 7d.
A similar effect can be obtained when 7d shares.

[0024]

As described above, according to the present invention, the outputs of all the input circuits 2a to 2c are connected to the redundant function check all 1s.
The detection circuit 8 and the redundant function confirmation all 0 detection circuit 9 are connected, and the output of the redundant function confirmation all 1 detection circuit 8 and the output of the redundant function confirmation all 0 detection circuit 9 are connected to the redundant function confirmation OR circuit 10. Since the output of the redundant function check OR circuit 10 is connected to the redundant function check output terminal 11, there is an effect that it is possible to know from the outside whether or not there is a faulty circuit in the input circuits 2a to 2c.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an embodiment of the present invention.

FIG. 2 is a configuration diagram showing another embodiment of the present invention.

FIG. 3 is a configuration diagram showing another embodiment of the present invention.

FIG. 4 is a block diagram showing another embodiment of the present invention.

FIG. 5 is a block diagram showing another embodiment of the present invention.

FIG. 6 is an explanatory view used for explaining an embodiment of the present invention.

FIG. 7 is a configuration diagram of a conventional multi-distribution apparatus with a redundant function.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Input terminal 2 Input circuit 3 Pull-up resistor 4 Open collector NAND circuit 5 Pull-up resistor 6 Output circuit 7 Output terminal 8 Redundant function confirmation all 1 detection circuit 9 Redundant function confirmation all 0 detection circuit 10 Redundant function confirmation OR circuit 11 Redundant function Confirmation output terminal 12 Redundant function confirmation open collector output circuit 13 Redundant function confirmation lower voltage dividing resistor 14 Redundant function confirmation upper voltage dividing resistor 18 Open collector output circuit 19 Delay circuit

Claims (5)

(57) [Scope of request for utility model registration] 1. An input terminal having three or more input circuits connected in common, a pull-up resistor connected to each of the outputs of the three or more input circuits, and the three or more inputs. An open collector NAND circuit to which two adjacent outputs of the circuit are connected, a pull-up resistor commonly connected to all outputs of the open collector NAND circuit,
Similarly, a plurality of output circuits commonly connected to all the outputs of the open collector NAND circuit, an output terminal for outputting each output of the plurality of output circuits to the outside, and three or more input circuits A redundant function confirmation all-one detection circuit to which all of the outputs are connected, a redundant function confirmation all-one detection circuit to which all of the outputs of the three or more input circuits are similarly connected, and a redundant function confirmation all-one detection circuit And a redundant function confirmation OR circuit to which the output of the redundant function confirmation all 0 detection circuit is connected and a redundant function confirmation output terminal for outputting the output of the redundant function confirmation OR circuit to the outside. Multi-distributor. 2. The three or more input circuits commonly connected to the input terminal, a pull-up resistor connected to each of the outputs of the three or more input circuits, and the three or more inputs An open collector NAND circuit to which two adjacent outputs of the circuit are connected, a pull-up resistor commonly connected to all outputs of the open collector NAND circuit,
Similarly, a plurality of output circuits commonly connected to all the outputs of the open collector NAND circuit, an output terminal for outputting each output of the plurality of output circuits to the outside, and three or more input circuits A redundant function confirmation all-one detection circuit to which all of the outputs are connected, a redundant function confirmation all-one detection circuit to which all of the outputs of the three or more input circuits are similarly connected, and a redundant function confirmation all-one detection circuit Redundant function confirmation OR circuit to which the output of the redundant function confirmation all-zero detection circuit is connected to the output of the redundant function confirmation OR circuit circuit, and redundant function confirmation open collector output circuit to which the output of the redundant function confirmation OR circuit is connected, and this redundant function confirmation open circuit Redundant function confirmation lower voltage divider connected in series with the output of the collector output circuit and the above redundant function confirmation open collector output of this redundant function confirmation lower voltage divider The redundant function check upper resistor divider connected to the other side of the circuit, the redundant function check lower resistor divider, and the redundant function check upper resistor divider are connected in common. A multi-distribution device comprising the input terminal described above. 3. The three or more input circuits commonly connected to the input terminals, the pull-up resistors connected respectively to the outputs of the three or more input circuits, and the three or more inputs An open collector NAND circuit to which two adjacent outputs of the circuit are connected, a pull-up resistor commonly connected to all outputs of the open collector NAND circuit,
Similarly, a plurality of output circuits commonly connected to all the outputs of the open collector NAND circuit, an output terminal for outputting each output of the plurality of output circuits to the outside, and three or more input circuits A redundant function confirmation all-one detection circuit to which all of the outputs are connected, a redundant function confirmation all-one detection circuit to which all of the outputs of the three or more input circuits are similarly connected, and a redundant function confirmation all-one detection circuit Redundant function confirmation OR circuit to which the output of the redundant function confirmation all-zero detection circuit is connected to the output of the redundant function confirmation OR circuit circuit, and redundant function confirmation open collector output circuit to which the output of the redundant function confirmation OR circuit is connected, and this redundant function confirmation open circuit Redundant function confirmation lower voltage divider connected in series with the output of the collector output circuit and the above redundant function confirmation open collector output of this redundant function confirmation lower voltage divider The redundant function check upper resistor divider connected to the other side of the circuit, the redundant function check lower resistor divider, and the redundant function check upper resistor divider are connected in common. And a delay circuit connected between the redundant function confirmation OR circuit and the redundant function confirmation open collector output circuit. 4. An input terminal having three or more input circuits connected in common, a pull-up resistor connected to each of the outputs of the three or more input circuits, and the three or more inputs. An open collector NAND circuit to which two adjacent outputs of the circuit are connected, a pull-up resistor commonly connected to all outputs of the open collector NAND circuit,
Similarly, a plurality of output circuits commonly connected to all the outputs of the open collector NAND circuit, an output terminal for outputting each output of the plurality of output circuits to the outside, and three or more input circuits A redundant function confirmation all-one detection circuit to which all of the outputs are connected, a redundant function confirmation all-one detection circuit to which all of the outputs of the three or more input circuits are similarly connected, and a redundant function confirmation all-one detection circuit Redundant function confirmation OR circuit to which the output of the redundant function confirmation all-zero detection circuit is connected to the output of the redundant function confirmation OR circuit circuit, and redundant function confirmation open collector output circuit to which the output of the redundant function confirmation OR circuit is connected, and this redundant function confirmation open circuit Redundant function confirmation lower voltage divider connected in series with the output of the collector output circuit and the above redundant function confirmation open collector output of this redundant function confirmation lower voltage divider A connection portion of the redundant function check upper voltage divider connected to the other side of the circuit, the redundant function check lower voltage divider, and the redundant function check upper voltage divider is commonly connected to the output of one output circuit. And a delay circuit connected between the redundant function confirmation OR circuit and the redundant function confirmation open collector output circuit. Dispensing device. 5. A three or more input circuits connected in common to the input terminal, a pull-up resistor which is connected in correspondence with the respective outputs of the three or more input circuits, three or above or more An open-collector NAND circuit to which two adjacent outputs of the input circuit are connected, a pull-up resistor commonly connected to all outputs of the open-collector NAND circuit,
Similarly, a plurality of open collector output circuits commonly connected to all outputs of the open collector NAND circuit, an output terminal for outputting each output of the plurality of open collector output circuits to the outside, , A redundant function check all 1 detection circuit to which all the outputs of the input circuits are connected, a redundant function check all 0 detection circuit to which all the outputs of the three or more input circuits are connected, and the redundant function check A redundant function confirmation OR circuit connected to the output of the all 1 detection circuit and the output of the redundant function confirmation all 0 detection circuit, a redundant function confirmation open collector output circuit connected to the output of the redundant function confirmation OR circuit, Redundant function check Lower resistor divider connected in series with the output of the open collector output circuit and the lower resistor resistor A redundancy check higher partial pressure resistor connected to the opposite side of the redundancy check open collector output circuit, connection of the redundancy check lower partial pressure resistor and the redundancy check upper dividing resistors which one of the open collector One output terminal, which also shares a redundant function confirmation output terminal commonly connected to the output of the output circuit, and a delay circuit connected between the redundant function confirmation OR circuit and the redundant function confirmation open collector output circuit. A multi-distribution device, comprising: