Apparatus for multiplex communication
View Patent ↗In an apparatus for multiplex communication, a bus line constitutes a bus type network for connecting a plurality of terminal communication equipments. A plug-shaped terminating resistance device is detachably provided at an end of the bus line to reduce reflection noise.
1. An apparatus for multiplex communication comprising:
a plurality of terminal communication equipments;
a bus line, which constitutes a bus type network for connecting the terminal communication equipments; and
a plug-shaped terminating resistance device, detachably provided at an end of the bus line to reduce reflection noises,
wherein the plug-shaped terminating resistance device comprises:
a first resistor;
a second resistor, connected to the first resistor in series;
a capacitor, in which one end of the capacitor is connected between the first resistor and the second resistor, and the other end of the capacitor is grounded; and
a bus bar, electrically connecting the first resistor, the second resistor, and the capacitor.
2. The apparatus as set forth in claim 1 , further comprising:
a joint connector, connected to the bus line so as to constitute the bus type network, and connected to the terminal communication equipments; and
wherein the tenninating resistance device is detachably fitted in the joint connector which is connected at a last stage of the bus line.
3. The apparatus as set forth in claim 2 , wherein the plug-shaped terminating resistance device further comprises:
an insulating resin housing, covering peripheral portions of the first resistor, the second resistor and the capacitor.
4. The apparatus as set forth in claim 7 , wherein the plug-shaped terminating resistance device further comprises:
an insulating resin housing, covering peripheral portions of the first resistor, the second resistor and the capacitor.
5. The apparatus as set forth in claim 2 , further comprising:
a line connector, which is connected to an end of the bus line extended from the joint connector which is connected at the last stage of the bus line: and
wherein the line connector connects one of the terminal communication equipments; and
wherein the plug-shaped terminating resistance device is detachably fitted in the line connector.
6. A plug-shaped terminating resistance device which is detachably provided at an end of a bus line which constitutes a bus type network for connecting a plurality of terminal communication equipments to reduce reflection noise, said plug-shaped terminating resistance device comprising:
a first resistor;
a second resistor, connected to the first resistor in series;
a capacitor, in which one end of the capacitor is connected between the first resistor and the second resistor, and the other end of the capacitor is grounded; and
a bus bar, electrically connecting the first resistor, the second resistor, and the capacitor.
7. An apparatus for multiplex communication comprising:
a plurality of terminal conununication equipments;
a bus line, which constitutes a bus type network for connecting the terminal communication equipments; and
a plug-shaped terminating resistance device, detachably provided at an end of the bus line to reduce reflection noise,
wherein the plug-shaped terminating resistance device comprises:
a first resistor;
a second resistor, connected to the first resistor in series;
a capacitor, in which one end of the capacitor is connected between the first resistor and the second resistor, and the other end of the capacitor is grounded; and
a printed circuit board, on which the first resistor, the second resistor, and the capacitor are mounted.
8. The apparatus as set forth in claim 7 , further comprising:
a joint connector, connected to the bus line so as to constitute the bus type network, and connected to the terminal communication equipments; and
wherein the terminating resistance device is detachably fitted in the joint connector which is connected at a last stage of the bus line.
9. The apparatus as set forth in claim 7 , further comprising:
a line connector, which is connected to an end of the bus line extended from the joint connector which is connected at the last stage of the bus line: and
wherein the line connector connects one of the terminal communication equipments; and
wherein the plug-shaped terminating resistance device is detachably fitted in the line connector.
10. A plug-shaped terminating resistance device which is detachably provided at an end of a bus line which constitutes a bus type network for connecting a plurality of terminal communication equipments to reduce reflection noise, said plug-shaped terminating resistance device comprising:
a first resistor;
a second resistor, connected to the first resistor in series;
a capacitor, in which one end of the capacitor is connected between the first resistor and the second resistor, and the other end of the capacitor is grounded; and
a printed circuit board, on which the first resistor, the second resistor, and the capacitor are mounted, wherein the circuit board is contained within the plug-shaped terminating resistance device.
11. The plug-shaped terminating resistance device as set forth in claim 6 , further comprising an insulating resin housing, covering peripheral portions of the first resistor, the second resistor and the capacitor.
12. The plug-shaped terminating resistance device as set forth in claim 10 , further comprising an insulating resin housing, covering peripheral portions of the first resistor, the second resistor and the capacitor.