Wiring Example For 1:1 Connections - Omron CJ2 CPU UNIT User Manual

Connection Examples
Examples for 2-wire and 4-wire Transmission Paths
The transmission path for 2-wire and 4-wire connections are different, as shown below.
Example for 4-wire Connections
2-wire/4-wire
switch (DPDT)
Option Board
Precautions for Correct Use Precautions for Correct Use
• All nodes must use either 2-wire connections or 4-wire connections.
• Do not use 4-wire connections with the switch on the Board set for 2-wire connections.

Wiring Example for 1:1 Connections

• Example for 2-wire Connections
CJ2M CPU Unit
RS-422A/485 Option Board
Signal
Pin
name
No.
3 SDA−
4 SDB+
1 RDA−
2 RDB+
5 FG
• Example for 4-wire Connections
CJ2M CPU Unit
RS-422A/485 Option Board
Pin
Signal
No. name
3 SDA−
4 SDB+
1 RDA−
2 RDB+
5 FG
• Using a B500-AL001 Link Adapter
CJ2M CPU Unit
Option Board
Pin Signal
name
No.
3 SDA−
4 SDB+
1 RDA−
2 RDB+
5 FG
CJ2 CPU Unit Hardware User's Manual
Other Unit Other Unit
External device
Shield
External device
Shield
B500-AL001
RS-422
Signal
Signal
Pin
name name
No.
6 RDA RDA
RS-422
1 RDB RDB
Interface
9 SDA SDA
5 SDB SDB
7 FG FG
RDA RDB SDA SDB
Signal name
6 1 9
Pin No.
Example for 2-wire Connections
2-wire/4-wire
switch (DPDT)
Other Unit Other Unit
Option Board
NC (Non Connection)
Signal
name
A(−)
B(+)
FG
Signal
name
RDA
RDB
SDA
SDB
FG
External device
RS-422
Signal
Pin
name
No.
6 RDA
1 RDB
9 SDA
5 SDB
7 FG
FG
5 7
External device
Signal
RS-422
name
RDA
RDB
SDA
SDB
FG
Appendices
A-137