Omron V600 Series Operation Manual page 92

RS-422 Interface
5-6-1 Connections Between ID Controllers for 1 to N Connection
ID Controller
PinNo. Abbr.
9
SDA
5 SDB
6
ROA
1 RDB
3
SG
7
FG
SDA SDB RDA RDB SG FG
Transmission side
termination resistor
5-6-2 Connection to Host Computer
Host Computer with Built-in RS-232C Interface
Host computer
Pin No.
1
2
3
4
RS-232C
Interface
5
6
7
8
20
Shielded cable (Note 1)
ID Controller
PinNo. Abbr.
9 Note: Ground either end of the shielded wire to prevent the
SDA
5 SDB
6
RDA
1 RDB
3
SG
7
FG
Reception side
termination resistor
Link adapter 3G2A9-AL004(-P)
RS-232C
Pin No. Abbr.
FG
1
SD
2
RD
3
RS
4
CS
5
6 DR
7
SG
8
CD
20
ER
Notes: 1. Connection example of shielded cable grounded at host computer.
2. Connection example of shielded cable grounded at ID Controller.
ID Controllers from malfunctioning. Do not ground both
ends of the shielded wire, otherwise the ID Controllers
may not operate properly. When using an
EMI-preventive connector (provided with the ID
Controller), connect the ground line to the connector
hood and not to the connector pin.
SDA SDB RDA RDB SG FG
Note: The termination resistance is 220 Ω.
Turn on the termination resistors of the
end Units. Turn off the termination
resister of any other Unit, otherwise
normal transmission will not be possible.
RS-422
Pin No. Abbr.
9
SDA
5 SDB
6 RDA
1
RDB
3 SG
7
FG
Section
ID Controller
Shielded cable
Pin No. Abbr.
9 SDA
5 SDB
6
RDA
1 RDB
3
SG
7
FG
(Note 2)
5-6
89