JP2508088B2 - Monitoring terminal - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a monitoring terminal device that performs time-division multiplexing transmission of a load state when each terminal device is accessed by a central monitoring control device.

(Prior Art) Conventionally, this type of monitoring terminal is housed in a distribution board. However, when the switch or the like to be monitored is originally located at a position away from the distribution board, it is rational to dispose a monitoring terminal device for monitoring the state of the switch or the like near the switch or the like. Conventionally, in this case, it is necessary to secure the installation space of the monitoring terminal in an unobtrusive place near the switch etc. for installation and wiring work, and it is difficult to perform construction work and wiring work for the monitoring terminal device. There was a problem.

(Object of the Invention) The present invention has been made in view of the above circumstances, and an object thereof is to attach a switch or the like to a mounting frame to which a wiring device such as a switch or the like to be monitored is attached. Another object of the present invention is to provide a monitoring terminal device that can be attached to and attached to a wiring device to facilitate construction work, simplify wiring work, and facilitate address setting change work.

DISCLOSURE OF THE INVENTION The gist of the present invention is to form the outer dimension of a main body to be twice the standard dimension of a wiring device. The first aspect of the present invention will be described below. A description will be given with reference to FIGS. Reference numeral 1 denotes a central supervisory control device, which forms a system by connecting a plurality of supervisory terminals 2 and control terminals 3 to a pair of signal lines. The monitoring terminal device 2 is for performing the time-division multiplex transmission of the state of the load Z when the central monitoring control device 1 accesses each of the terminal devices 2 and 3. Then, the tongue piece 7 having the locking portion for the body 5 and the lid 6
The outer dimensions of the main body 8 combined by the above are formed to the size of the standard dimensions (JIS.C8303 large-angle boss) of the wiring device 9 such as a switch, and the mounting frame 10 is installed in series with the wiring device 9.
Locking means for locking to is provided. This locking means is a pair of claws 11a when locking to the plastic mounting frame 10.
And a hole when locking to a metal mounting frame (not shown)
11b, and in this embodiment, both are provided so that any mounting frame can be locked. A dip switch 12 for address setting is provided on the boss portion 5a. In addition, a terminal (not shown) connected to the wiring device 9 such as a switch serving as a monitoring input is provided. And the mounting frame
10 is fixed to the embedded box 13 with screws, and the mounting frame
A plate 15 provided with holes 14 is attached to the front surface of 10 to complete the work. In this case, the boss portion 5a is hidden by the plate 15. Therefore, the address change and the inspection work can be performed only by removing the plate 15.

Next, the operation of this system will be described. The central supervisory control device 1 shown in FIG. 2 has a transmitting circuit 16 for constantly sending out the dummy transmission signal Vs shown in FIG. An interrupt processing circuit 17 is provided for receiving the returned interrupt signal Vi, detecting the interrupt-generating terminal device 2, accessing the terminal device 2, and returning the monitoring data VB. The monitoring terminal 2 shown in FIG. 3 generates an interrupt signal Vi in synchronization with the start pulse signal ST of the dummy transmission signal Vs when a monitoring input is made, and also in the address confirmation mode from the central monitoring controller 1. Transmission signal
An interrupt generating means for returning its own unique address data in synchronization with the return standby signal WT of Vs, and the central supervisory control device 1
A signal processing circuit 18 having a data returning means for returning the monitoring data VB corresponding to the monitoring input of the wiring device 9 when the transmission signal Vs in the interrupt access mode in response to the interrupt from is transmitted. It is a circuit, and is composed of an LED 20a for displaying the ON state of the wiring device 9 used as a switch and an LED 20b for displaying the OFF state. Reference numeral 21 is a receiving circuit, 22 is a transmitting circuit, and 23 is a rectifying circuit.

Then, based on the monitoring data Vs returned from the monitoring terminal device 2 to the central monitoring control device 1, the control terminal device 3 is operated, and control data for controlling the relay 24 for controlling the load Z is sent to the central monitoring control device 1. Created in and transmitted. Also,
The monitoring data Vs may be obtained from the monitoring input of the relay 24 included in the control terminal 3. 25 is an individual operation selector switch, 26 is a pattern switch for collectively pattern controlling a plurality of loads Z, 27 is a control terminal device with a built-in relay, and 28 is a contact input monitoring terminal device for pattern control. The load is operated by the contact input of the timer 29.

(Effects of the Invention) As described above, the present invention forms the external dimensions of the main body to the standard size of the wiring equipment and provides the dip switch for address setting on the boss portion concealed by the plate. Since the locking means for locking the mounting frame in series is provided, it is possible to connect the wiring device to the mounting frame to which the wiring device such as the switch to be monitored is mounted, and to install the wiring device easily. At the same time, the wiring work can be simplified, and as the construction members such as the plate and the mounting frame, members of ordinary wiring equipment can be used, and further, the monitoring terminal device in which the address setting change work is easy can be obtained.

[Brief description of drawings]

1 to 5 show an embodiment of the present invention. FIG. 1 is an exploded perspective view, FIG. 2 is a circuit diagram, and FIG. 3 is a block diagram.
FIG. 4 is a system diagram, and FIG. 5 is a waveform diagram. 1 ... Central monitoring control device, 2 ... Monitoring terminal device, 3 ...
Control terminal, 4 ... Signal line, 5 ... Body, 6 ... Lid, 7 ... Tongue, 8 ... Main body, 9 ... Wiring equipment, 10 ...
Mounting frame, 11 ... Locking means.

Claims (2)

(57) [Claims] 1. A central supervisory control device, a plurality of supervisory terminals and a control terminal device are connected to a pair of signal lines to form a system, and each central device is accessed from the central supervisory control device. This is a monitoring terminal device that performs time-division multiplex transmission of the load status.The external dimensions of the main unit are formed to the standard size of wiring equipment, and a boss that is concealed by a plate is equipped with a DIP switch for address setting. A monitoring terminal, characterized in that a locking means for locking the device to the mounting frame is provided. 2. The monitoring terminal according to claim 1, wherein the locking means is a pair of claws.