PLC for providing space-efficient input/output interface
AssigneeIlpum Corp.
InventorZeajong Kang
Life of this patent
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Abstract
A PLC according to an embodiment of the present invention is disclosed. The PLC according to an embodiment of the present invention comprises: a master unit; and a plurality of interface units which access the master unit via a system bus. The master unit includes: a control unit for controlling input/output and processing commands; and a plurality of first RJ45 terminals for input/output of data, wherein a maximum of eight signals are arranged via each pin of each of the first RJ45 terminals. Each of the interface units includes a connection means for connecting a signal between a second RJ45 terminal for connecting a signal line from each of the first RJ45 terminals and an external device, wherein the interface units are configured to be expandable by the number of the first RJ45 terminals.
Claims8
A PLC comprising:
- a master unit and a plurality of interface units connected to the master unit through a system bus,
- wherein the master unit includes a control unit for controlling an input/output and processing a commands and a plurality of first RJ45 terminals for input/output of data, and a maximum of eight signals are arranged through each pin of each of the first RJ45 terminals,
- wherein the interface unit includes a second RJ45 terminal for connecting a signal line from the first RJ45 terminal and a connection means for connecting a signal with an external device,
- wherein the interface unit is expandable by the number of the first RJ45 terminals,
- wherein the master unit further comprises a plurality of status display LEDs (Light Emitting Diode) for displaying a state of a signal line,
- wherein the status display LEDs are classified into a first LED group provided at least as many as the number of the first RJ45 terminals to specify a first RJ45 terminal, to which a signal line to display a state belongs, and a second LED group provided at least as many as the number of pins of each first RJ45 terminal to specify a pin number of the first RJ45 terminal, and
- wherein the state of the signal line is output to a predetermined LED of the first LED group and the second LED group at a constant cycle for each first RJ45 terminal.
A master unit of a PLC for connection via at least one interface unit and a system bus comprising:
- a control unit for controlling an input/output and processing a command;
- and
- at least one first RJ45 terminal for input/output of data,
- wherein a maximum of eight signals are arranged through each pin of each of the first RJ45 terminals, and a signal line is connected through a connection between the first RJ45 terminal and a second RJ45 terminal included in the interface unit,
- wherein the interface unit is connected as many as the number of the first RJ45 terminal,
- wherein the master unit further includes a plurality of status display LEDs for displaying a state of a signal line,
- wherein the status display LEDs are classified into a first LED group provided at least as many as the number of the first RJ45 terminal to specify a first RJ45 terminal, to which a signal line to display a state belongs, and a second LED group provided at least as many as the number of pins of each first RJ45 terminal to specify a pin number of the first RJ45 terminal, and
- wherein the state of the signal line is output to a predetermined LED of the first LED group and the second LED group at a constant cycle for each of the first RJ45 terminal.
Dependencies are inferred from the claim text.