Chapter 8 Communication Functions

(2) 1:1 connection with a monitoring device like PMU

PMU(LGIS)

MASTER-K120S main unit

RS-485 interface

RS-232C interface

PMU

MASTER-K120S main

unit

Pin assignment and direction

 

 

Pin No.

Pin no.

Signal

 

 

1

1

5V

1

6

2

2

RXD1

2

7

3

3

TXD1

3

8

 

 

 

4

4

4

RXD2

9

5

 

 

 

 

5

5

SG

 

 

 

 

6

6

5V

 

 

7

7

TXD2

Female Type

8

8

SG

 

 

9

9

SG

PMU

Connection method and signal direction

MASTER-K120S main unit

485+

 

485+

485-

 

485-

8-3

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Image 193
LG Electronics 120S user manual Pmulgis