Omron CQM1H-SCB41 Operation Manual page 135

Connections
1:N, 4-wire Connections from RS422A/485 to RS422A/485 Ports (1:N Mode)
1:N, 2-wire Connections from RS-422A/485 to RS-422A/485 Ports (1:N Mode)
120
Serial Communications
Board
RS-422A
/485 In-
terface
D-sub, 9-pin
connector (male)
Communications Mode: 1:N NT Link
Note Serial Communications Board settings: Terminating resistance ON, 4-wire.
Serial Communications
Board
RS-422A/
485 Inter-
face
D-sub, 9-pin
connector (male)
Communications Mode: 1:N NT Link
Note Serial Communications Board settings: Terminating resistance ON, 2-wire.
Signal
Pin
Hood
Signal
Pin
Hood
Section 8-3
PT
Signal
RS-422A
/485 In-
terface
FG
Terminal block or
D-sub connector
Short bar
PT
Signal
RS-422A
/485 In-
terface
FG
Terminal block or
D-sub connector
PT
Signal
RS-422A
/485 In-
terface
FG
Terminal block
Short bar
PT
Signal
RS-422A
/485 In-
terface
FG
Terminal block