5
Overview Section 1-2
CJ Series
Connectable Devices The following serial communications modes are supported by the Serial Com-
munications Boards: Host Link (SYSMAC WAY) (see note 1), protocol macro,
1:N NT Link (see note 2), no-protocol (see note 1), Modbus-RTU slave (see
note 3), and loopback test modes. The devices shown in the following diagram
can be connected.
CS1W-SCU21-V1
(Two RS-232C ports)
CS1W-SCU31-V1
(Two RS-422A/485 ports)
RS-232C port
RS-232C port
RS-422A/485 por
RS-422A/485 por
CJ1W-SCU21-V1
(Two RS-232C ports)
CJ1W-SCU41-V1
(One RS-232C and One RS-
422A/485 Port)
CJ1W-SCU31-V1
(Two RS-422A/485 ports)
P
A
2
0
5
R
P
O
W
E
R
INPUT
AC100-240V
L2/N
L1
DC24V
AC240V
OUTPUT
RUN
P
E
R
IP
H
E
R
A
L
E
R
R
/A
L
M
R
U
N
IN
H
C
O
M
M
P
R
P
H
L
C
O
N
T
R
O
L
L
E
R
CJ1G-CPU44
SYSMAC
P
R
O
G
R
A
M
M
A
B
L
E
P
O
R
T
O
P
E
N
B
U
S
Y
M
C
P
W
R
2
ON
4
TERM
RD2
SD2
RDY
NO.
UNIT
ERH
OFF
WIRE
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
ERC
RUN
SCU41
RD1
TER1
SD1
PORT1
(RS422
/485)
PORT2
Serial Communications Unit
RS-232C port
RS-232C port
RS-422A/485 port
RS-232C port
RS-422A/485 port
RS-422A/485 port
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