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2 Initial Settings and Allocations of Device Variable for CJ-series Unit
2-2
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
2-1
Component Names and Functions
CJ-series Serial Communications Unit
ERC
RUN
RD2
SCU22
RD1
SD2
RDY
NO.
UNIT
ERH
SD1
PORT1
PORT2
01
23
4567
89
AB
CDE
F
CJ1W-SCU22
Indicators
Unit number
switch
Port 1:
RS-232C
Port 2:
RS-232C
PORT1
(RS422
/485)
2
ON
4
TERM
ERC
RUN
RD2
SCU42
RD1 TER1
SD2
RDY
NO.
UNIT
ERH
SD1
RDA-
RDA+
SDA-
SDA+
FG
OFF
WIRE
PORT2
01
23
4567
89
AB
CDE
F
CJ1W-SCU42
Port 2:
RS-232C
2-wire/4-wire
switch
Indicators
Terminating
resistance switch
Unit number
switch
Port 1:
RS-422A/485
terminal-block
connector
2
ON
4
TERM
ERC
RUN
RD2 TER2
SCU32
RD1 TER1
SD2
RDY
NO.
UNIT
ERH
SD1
PORT1
(RS422
/485)
(RS422
/485)
OFF
WIRE
PORT2
01
23
4567
89
AB
CDE
F
CJ1W-SCU32
2
ON
4
TERM
OFF
WIRE
RDA-
RDA+
SDA-
SDA+
FG
RDA-
RDA+
SDA-
SDA+
FG
Terminating resistance
switch (for port 2)
2-wire/4-wire switch
(for port 2)
Bottom view
Indicators
Unit number
switch
Terminating
resistance
switch (for port 1)
2-wire/4-wire
switch
(for port 1)
Port 1:
RS-422A/485
terminal-block
connector
Port 2:
RS-422A/485
terminal-block
connector