Omron CJ2 CPU UNIT - A-4 Connecting to a Serial Port on the CPU Unit; Wiring Example for 1:1 Connections

A-137
Appendices
CJ2 CPU Unit Hardware User’s Manual
A-4 Connecting to a Serial Port on the CPU Unit
App
A-4-3 Applicable Connectors and Recommended Cables
z 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.
Precautions for Correct UsePrecautions 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
• Example for 4-wire Connections
• Using a B500-AL001 Link Adapter
NC (Non Connection)
Option Board
Other Unit Other Unit Other Unit Other Unit
Example for 4-wire Connections Example for 2-wire Connections
2-wire/4-wire
switch (DPDT)
2-wire/4-wire
switch (DPDT)
Option Board
SDA−
SDB+
RDA−
RDB+
FG
3
4
1
2
5
FG
Signal
name
Pin
No.
Signal
name
A(−)
B(+)
Shield
CJ2M CPU Unit
RS-422A/485 Option Board
External device
SDA −
SDB+
RDA
−
RDB+
FG
3
4
1
2
5
RDA
RDB
SDA
SDB
FG
Signal
name
Pin
No.
Signal
name
Shield
CJ2M CPU Unit
RS-422A/485 Option Board
External device
SDA−
SDB+
RDA−
RDB+
FG
3
4
1
2
5
B500-AL001
6
1
9
5
7
RDA
RDB
SDA
SDB
FG
6
1
9
5
7
RDA
6
RDB
1
SDA
9
SDB
5
FG
7
RDA
RDB
SDA
SDB
FG
RDA
RDB
SDA
SDB
FG
RS-422
RS-422
RDA
RDB
SDA
SDB
FG
RS-422
Signal
name
Pin
No.
Signal
name
Signal
name
Signal
name
Signal
name
Pin
No.
Pin
No.
Signal name
Pin No.
RS-422
Interface
CJ2M CPU Unit
Option Board
External device
External device