Chapter 8 Communication Functions

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(3) 1:1 connection with other MASTER-K120S

MASTER-K120S main unit

MASTER-K120S main unit

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RS-232C interface

RS-485 interface

 

 

MASTER-K120S

MASTER-K120S main unit

 

 

main unit

 

 

Pin assignment and direction

 

 

 

Pin no.

Pin no.

Signal

 

 

1

1

5V

5

 

2

2

RXD1

9

 

 

 

4

3

3

TXD1

8

3

 

 

 

7

4

4

RXD2

2

6

 

 

 

1

5

5

SG

 

 

 

6

6

5V

 

 

7

7

TXD2

 

 

8

8

SG

Male Type

 

9

9

SG

 

 

MASTER-K120S main unit

Connection method and signal direction

MASTER-K120S main unit

485+

 

485+

485-

 

485-

8-4

Page 194
Image 194
LG Electronics user manual MASTER-K120S, Pin assignment and direction Pin no Signal