Rockwell Automation 1203 Serial Communications Module Series B - Manual (Page 17)

2–3 Installation
1203–5.5 September 1995
Switch SW1
Switch SW1 is used to select:
•
serial communications mode (RS–232/RS–422/RS–485/DH–485)
•
Serial Communications Module address
SW1
O
F
F
O
N
8 7 6 5 4 3 2 1
Communications
Module Address
Protocol
Selection
AB0398B
Use SW1–1 and SW1–2 to select the communications protocol you
are using:
Switch Value
(Decimal)
SW1 Protocol
0
O
–
8 7 6 5 4 3 2 1
RS–232 (DF1 protocol)
1
O
–
8 7 6 5 4 3 2 1
RS–422 (DF1 protocol)
2
O
–
8 7 6 5 4 3 2 1
RS–485 (DF1 protocol)
3
O
–
8 7 6 5 4 3 2 1
DH–485