LG MASTER-K 120S Series User Manual page 193

Chapter 8 Communication Functions
(2) 1:1 connection with a monitoring device like PMU
1
2
3
4
5
Female Type
PMU(LGIS)
RS-485 interface
RS-232C interface
PMU
Pin No.
1
2
6
7
3
8
4
9
5
6
7
8
9
PMU Connection method and signal direction
485+
485-
MASTER-K120S main unit
Pin assignment and direction
8-3
MASTER-K120S main
unit
Pin no. Signal
1 5V
2 RXD1
3 TXD1
4 RXD2
5 SG
6 5V
7 TXD2
8 SG
9 SG
MASTER-K120S main unit
485+
485-