Appendix
18
SIEMENS-S7 300 SERIES PLC TO NTXS UNIT
SIEMENS S7-300 SIDE
DB9 MALE
(RS485)
SIGNALS
A
SG
B
Note: These details are also applicable to Siemens S7-200
192
2 mtr.
Shield Wire
Pin #
1
2
3
4
5
6
7
8
9
Shield Wire to DB9 body
NTXS SIDE
DB9 MALE
(RS485)
Pin #
SIGNALS
1
TX+
A
2
3
4
RX+
5
6
7
8
TX-
B
9
RX-
DB9 MALE
PINOUTS
6
9
SG
1
5