Connecting Via Serial (Rs-422A/485) - Omron NV Series Setup Manual

Wiring the Power Supply and Serial Communications
4-4-4

Connecting via Serial (RS-422A/485)

RS-422A Connections
CS1W-SCB41-V1
OFF
SCB41-V1
CJ1W-SCU41-V1
SCU41-V1
TERM
OFF
WIRE
72
■
Setting
Set RS-422A/485 to 4-wire communications on the PLC.
Turn ON the terminating resistance.
When connecting to a Serial Communications Board/Unit with RS-422A, set
the switches on the front of the Unit/Board as shown below.
CS1W-SCU31-V1
RDY
RUN
ERC
COMM1
SD1
COMM2 RD1
TER1
PORT1
A
ON TERM
2 4 WIRE
Port 2:
PORT2
(RS422/
RS-422A/485
RS485)
CJ1W-SCU31-V1
SCU31-V1
RUN ERC SD1 RD1 TER1
SD2
RDY ERH RD2
A
TERM
UNIT
ON
OFF
NO.
WIRE
2 4
PORT1
(RS422
/485)
Port 1:
RS-422A/485
PORT2
■ Connections
XM2S-09
PLC
To power
supply
Note A PLC cannot be connected to multiple OMRON PLC using the Host Link pro-
tocol.
A Serial Communications Board/Unit Settings
OFF
2
SCU31-V1
RDY
ERH
SD2
RD2
TER2
UNIT
No.
TERM OFF ON A
WIRE 2 4
PORT1
(RS422
/485)
Port 1:
RS-422A/485
A
TERM OFF ON
4
WIRE 2
PORT2
(RS422
/485)
Port 2:
RS-422A/485
RUN ERC SD1 RD1 TER1
RDY ERH SD2 RD2 TER2
A
UNIT
ON
NO.
2 4
PORT1
(RS422
/485)
Port 1:
RS-422A/485
PORT2
(RS422
/485)
Port 2:
RS-422A/485
TERM
OFF ON
WIRE
2 4
PLC Serial
Communications
Unit/Board
PT
RS-422A
(4-wire)
+SD
-SD
+RD
-RD
E
Section 4-4
ON TERM
4 WIRE
Terminating resistance switch
ON: Terminating resistance connected.
2-/4-wire switch
4: 4-wire connection
Bottom View
A
To 24-V
power supply
Pin
Signal
1
SDA
2
SDB
RDA 6
RDB 8
FG Shell
PT:
RS-422
Pin
Signal
+
1
−
2
FG
3
+SD
4
−SD
5
+RD
6
−RD
7
E
8