JPH062360Y2 - Transmission terminal equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a terminal device connected to a signal transmission path.

[Conventional technology]

FIG. 4 is an example of a configuration diagram of a conventional transmission terminal device,
In the figure, (1) is a transmission bus interface unit, (2) is an input signal processing unit from the outside, (3) is an output signal processing unit to the outside, (4) is a transmission bus, (5) is an external contact, (6) is input circuit, (7a) is output relay coil, (7b) is relay contact, (8)
Is an external output auxiliary relay.

Next, the operation will be described. External contact status change (O
N, OFF) is transmitted to another terminal device (not shown) via the input circuit (6) and the transmission bus interface unit (1) and the transmission bus (4). Signals from other terminal devices (not shown) are transmitted via the transmission bus (4) and transmission bus interface unit (1).
The relay coil (7a) and the relay contact (7b) are operated through to output externally.

[Problems to be Solved by the Invention] In the conventional transmission terminal device, one unit is configured as described above. Therefore, there are the following problems.

The operation of the bus could not be confirmed unless the entire terminal device was attached to the transmission bus.

If the circuit board differs depending on the type of terminal device and the construction period is short, early arrangements are necessary and there is a work-in-progress loss.

This invention was made in order to solve the above-mentioned problems. Before the overall specifications were determined, the transmission bus interface consisting of the circuit board and the box body common to all models was made one unit. An object of the present invention is to obtain a transmission terminal device capable of confirming the function of only the transmission bus function in advance.

[Means for solving problems]

In the transmission terminal device according to the present invention, the transmission bus interface unit and the input / output signal processing unit are unitized so that they can be separated from each other, and the transmission bus interface unit alone can check the signals of the transmission bus unit. It is a thing.

[Action]

In the present invention, the LED signal provided on the transmission bus interface unit allows the bus signal to be confirmed by connecting only the transmission bus interface unit to the transmission bus, and further, by simply replacing the input / output signal processing unit, It is possible to configure transmission terminal devices having different functions.

[Example of device]

 An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, (1) is a transmission bus interface unit, (2) is an input signal processing unit, (3) is an output signal processing unit, (4) is a transmission bus, and (9) is a bus signal confirmation L.
ED, (15) are electrical connection connectors of the input signal processing unit section (2), the output signal processing unit section (3) and the transmission bus interface unit section.

FIG. 2 shows the whole transmission system. (10) is a transmission master station, (4) is a transmission bus, and (11) is a transmission terminal device of the present invention.

FIG. 3 shows a signal receiving circuit section from the transmission bus (4). (9) is an LED for signal confirmation of the transmission bus (4), that is, signal presence / absence display means, (12) is a photocoupler, and (14). Is a HIC (Hybrid Integrated Circuit) of the transmission module.

Next, in FIG. 1, the input / output signal processing units (2) and (3) and the transmission bus interface unit (1) are divided into respective packages, and screws (30) are fixed so that they can be combined and separated from each other. There is.

In FIG. 3, signals are transmitted to other terminal stations (1
1), transmitted from the master station (10). The level G is always 0V at the ground, the level S is normally DC 12V, and the LED (9) is lit. When there is a transmission from another station, the level S drops to 0V and the LED (9) is turned off. When the transmission bus (4) is normal, there is polling transmission from the master station (10) to the slave stations (11) in sequence, and one slave station (11) (terminal device) periodically (transmits between slave stations). Received from the master station (10) (even without). LED
(9) blinks periodically or intermittently. This confirms that the transmission bus (4) and the master station (10) as a whole system are normal. By the way, when the S level is 0V, the photo coupler (1
2) does not operate, the base current flows through the transistor (13), so the collector current flows, and the HIC (1
The input port R of 4) becomes 0V. On the contrary, when there is no reception, the state is DC5V.

[Effect of device]

As described above, according to the present invention, the input / output signal processing unit and the transmission bus interface unit can be separated, and a standard transmission bus interface unit common to all models is arranged in advance and attached to the bus. Since the condition can be confirmed, the construction period can be shortened.
Further, when it is desired to disconnect one or several terminal devices from the bus and inspect or replace it, it is sufficient to remove only the input / output signal processing unit without affecting the entire bus, and the bus interface unit can be attached.

In addition, the hardware and components of the bus interface unit can be standardized, advanced arrangements can be made, and mass production is possible, which is effective in terms of cost and delivery.

[Brief description of drawings]

1 to 3 show an embodiment of the present invention, FIG. 1 is a side view of a transmission terminal device with a circuit diagram added, and FIG. 2 is a diagram showing a configuration of a transmission system. The figure is a view showing a coupling state between the LED display section and the input / output signal processing unit of the transmission bus interface unit. FIG. 4 is a diagram showing a configuration of a conventional transmission terminal device. In the figure, (1) is a transmission bus input / output interface unit, (2) is an input signal processing unit, (3) is an output signal processing unit, (4) is a transmission bus, and (9) is a bus signal confirmation L.
ED and (15) are connectors. In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] 1. A device for connecting a plurality of transmission devices in common by a transmission bus and transmitting signals to each other, wherein a transmission bus interface unit branched and connected to the transmission bus and the transmission bus interface unit are used. And an input / output signal processing unit for transmitting and receiving signals to and from the transmission bus, the transmission bus interface unit and the input / output signal processing unit are separable, and the transmission bus interface unit is provided with the transmission bus. A transmission terminal device comprising signal presence / absence display means for displaying the presence / absence of a signal above.