Omron NQ HMI Getting Started Manual page 138

A-4-5 NQ to Siemens S7-300/400 Series
/i
DB9 MALE PINOUTS (PLC)
Signals
B
SG
A
shield wire to DB9 body
124
Pin number
1
2
3
4
5
6
7
8
9
DB9 MALE PINOUTS (NQ)
Pin number
A 1
2
3
4
5
6
B 7
8
9
shield wire to DB9 body
Signals
TX+
RX+
SG
TX-
RX-