JPH0530137Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a processing device that can connect signal output devices with different output signal formats and processes data of the connected signal output devices. , automatically detects the output signal form of the signal output device connected to the common connector provided on the processing device, and if it requires power from the processing device,
The present invention relates to an automatic model selection and switching device that switches to apply power from a processing device.

[Technical background of the invention] For example, measuring instruments that measure various electrical characteristics such as current, voltage, resistance, or waveform recording use a recording device such as a printer that records the measurement results in a distinguishable manner on the measuring instrument itself. In addition to the format that has a built-in
There is a format in which a recording device is not built in, only a signal output terminal for outputting measurement data is provided, and this signal output terminal is connected to a data input terminal of a separately prepared printer to obtain a hard copy of the recorded data.

When a signal output device such as a measuring instrument is connected to a processing device such as a printer in this way, the measuring device is equipped with its own power source and automatically sends data signals to the connected processing device. There are types that output data, and types that do not output data signals unless the data output side receives power from the processing device, such as when the interface is an open collector type. Therefore,
Processing devices are required to have a function that can support these signal output devices with different signal output formats.

Therefore, in conventional processing devices, two connectors are provided, one having only a signal line and the other having a signal line and a power line, and the connector used can be changed depending on the signal output device to be connected. By providing a switch for switching between the line and the power line, one connector can be used in common.

[Problems that the invention aims to solve] However, in the former type, not only does the processing device not work due to incorrect connection of the connector;
The processing device may be damaged, and to prevent this, it is possible to change the shape of each connector, but to do so, it is also necessary to change the connector on the signal output device side, and a variety of connectors must be prepared. Otherwise, the cost will increase. In the latter case, a mistake in switching the switch may cause the processing device to malfunction or be damaged.

Therefore, the purpose of this invention is to determine the necessity of power supply from the processing device when signal output devices with different output signal formats are connected to the processing device, and if the power source from the processing device is required, the processing device It is an object of the present invention to provide an automatic model selection and switching device that switches to apply power from the same device, and to reliably prevent the above-mentioned malfunctions even if a connector is shared.

[Means for Solving the Problems] The automatic model selection switching device of this invention is a plurality of signal output devices each having a plurality of output terminals that output a common timing signal and various data signals, One of the output terminals of at least one of the signal output devices is connected to one of the plurality of signal output devices serving as a power supply terminal by a connecting means having a plurality of connection terminals,
In a processing device that processes the data signal from the signal output device into a predetermined form, the processing device is connected to a terminal to which an output terminal and a power supply terminal are selectively connected among the connection terminals of the connection means. a switching means for selectively connecting the signal input line of the processed processing device to a power supply line for data signal input; and a signal output device connected to the switching means, when the timing signal cannot be read from the power supply terminal for a predetermined period of time; The apparatus is characterized by comprising a control means for switching the switching means to the power line side.

[Example] Hereinafter, an example of this invention shown in the drawings will be described. In this embodiment, the processing device is a printer 1, and the two signal output devices are a first measuring device 2 and a second measuring device 3, each of which outputs a data signal in the form of a BCD code digital signal. The interface is of an open collector type and requires power from the printer 1 in order to output digital signals representing measurement data, and the interface of the second measuring instrument 3 requires power from the printer 1. The example is a type that outputs a digital signal of measurement data without needing it.

The printer 1 includes a first measuring device 2 and a second measuring device 3.
A central processing unit (hereinafter referred to as
5, and an output device 6 such as a printing section whose operation is controlled by the CPU 5.

The first measuring device 2 and the second measuring device 3 each have male connectors 7 and 8 to which a female connector 4 is connected.
is connected. Although not shown, the male connector 7 has a terminal to which a timing signal is output, and a terminal 4 to which a BCD code digital signal is output.
It shall have two terminals, a ground line terminal and an interface power supply terminal. Similarly, the male connector 8 has a terminal for outputting a timing signal, four terminals for outputting a BCD code digital signal, and a ground line terminal, which corresponds to the power supply terminal for the interface of the male connector 7. The terminal that connects is used as a signal terminal.

On the other hand, the female connector 4 of the printer 1 has a timing signal terminal 11 connected to the timing signal terminals of the male connectors 7 and 8, as shown in FIG.
, four digital signal terminals 12 respectively connected to the digital signal terminals of the male connectors 7 and 8, a ground line terminal 13 connected to the ground line terminals of the connectors 7 and 8, and an interface of the connector 7. It has a switching terminal 14 to which either the power supply terminal or the signal terminal of the connector 8 is connected. A switching contact 16 of a relay 15 is connected to this switching terminal 14 . The relay 15 may be provided in the female connector 4 or in the printer 1, and its first fixed contact 1
7 is the signal line of the CPU 5, and the second fixed contact 18 is the power supply terminal 1 for the interface of the CPU 5.
9 is connected. The switching operation of relay 15 is
This is carried out by the CPU 5 as follows.

Now, when the switching contact 16 of the relay 15 is located on the first fixed contact 17 side as shown in FIG.
Assuming that the male connector 7 of the first measuring device 2 is connected to the female connector 4 of the printer 1, a description will be given according to the flowchart shown in FIG. This results in
A timing signal from the first measuring instrument 2 is applied to the timing signal terminal 11, a data signal from the first measuring instrument 2 is applied to the digital signal terminal 12, and an interface of the first measuring instrument 2 is applied to the switching terminal 14. power terminal is connected. However, since the switching contact 16 of the relay 15 is connected to the fixed contact 17 on the signal line side and is not connected to the interface power terminal 19 side, the timing signal terminal 1
Although the timing signal from the first measuring device 2 is applied to the first measuring device 1, it cannot accept this as a clock signal. Therefore,
No data signals are applied to CPU5.
In response to this, the CPU 5 determines that the male connector 7 of the first measuring device 2 is connected to the female connector 4, and instructs the relay 15 to switch the switching contact 16 to the second fixed contact 18 side. As a result, the power supply voltage from the interface power supply terminal 19 is applied to the first measuring device 2 from the switching terminal 14,
The timing signal from the first measuring device 2 and the data signal from the first measuring device 2 can be taken into the four digital signal terminals 12, and the CPU 5 performs data processing necessary for outputting to the output device 6.

The switching contact 16 of the relay 15 is the first fixed contact 17
If the male connector 8 of the second measuring device 3 is connected to the female connector 4 of the printer 1 when the printer is located at the side, the signal from the second measuring device 3 is applied from the switching terminal 14 through the relay 15 Since the timing signal from the timing signal terminal 11 can be taken in as a clock signal, the data signal from the second measuring device 3 can be taken in, so the CPU 5 does not issue a switching instruction to the relay 15.

In the above-mentioned embodiment, the connection between a measuring instrument and a printer is taken as an example, but the connection is not limited to this, and although connection is possible by a common connection means, at least one connection terminal among a plurality of connection terminals is used. It goes without saying that it can be applied to connections between various types of equipment, such as for signal input or for power input required for signal input.

[Effects of the invention] As described above, the automatic model selection switching device of this invention has different signal formats so that at least one of the plurality of connection terminals becomes a signal line or a power supply output line for signal input. Even if different signal output devices are selectively connected using a common connection means, the control means can detect the different signal lines and automatically switch them for signal input or power output. Therefore, when connecting different devices by sharing the connection means, erroneous connections can be completely prevented. In addition, its configuration can be made up of just two, a relay and a control means for controlling it, and the control means is also a processing device.
If you have a CPU, you can use it, so
It can be implemented without major improvements to existing equipment.

[Brief explanation of the drawing]

Fig. 1 is a block diagram schematically showing an embodiment of this invention, Fig. 2 is a diagram showing the connector section, and Fig. 3 is a diagram schematically showing an embodiment of this invention.
The figure is a flowchart. In the drawing, 1 is a printer, 2 and 3 are measuring instruments, 4 is a female connector, 5 is a CPU, 6 is an output device, 7 and 8 are male connectors, 11 is a timing signal terminal, 12 is a digital signal terminal, and 13 is ground Line terminal, 14 is switching terminal, 15 is relay, 1
6 is a switching contact, and 17 and 18 are fixed contacts.

Claims (1)

[Claims for Utility Model Registration] (1) A plurality of signal output devices each having a plurality of output terminals that output various data signals together with a common timing signal, at least one of which outputs the signal output terminal. One of the output terminals of the device is connected to one of the plurality of signal output devices, which is a power supply terminal, by a connecting means having a plurality of connection terminals, and according to the data signal from the signal output device. In a processing device for processing into a predetermined form, the processing device has a signal input line of the processing device and a terminal to which the output terminal and the power supply terminal are selectively connected among the connection terminals of the connection means. A switching means for selectively connecting a power line for inputting a data signal; and a switching means for connecting the signal output device to the connecting means, and when the timing signal cannot be read from the power supply terminal for a predetermined period of time, 1. An automatic model selection and switching device characterized by comprising a control means for switching to a line side. (2) Utility model registration Claim 1, characterized in that the switching means is constituted by a relay, and when the control means cannot read the timing signal, the control means operates the relay to switch to the power line side. Automatic model selection switching device. (3) Utility Model Registration The automatic model selection and switching device according to claim 1, wherein the control means also serves as a central processing unit of the processing device.