A-121
Appendices
CJ2 CPU Unit Hardware User’s Manual
A-4 Connecting to a Serial Port on the CPU Unit
App
A-4-2 Connection Examples
z RS-422A/485 Ports with 1:N Connections
FG
SD
RD
RS
CS
DR
ER
SG
1
2
3
4
5
6
7
8
9
NC
SD
RD
RS
CS
5V
DR
ER
SG
1
2
3
4
5
6
7
8
RS-422RS-232
GRD
SG
SDB
SDA
RDB
RDA
CSB
CSA
9
5
6
1
3
7
SDA
SDB
RDA
RDB
SG
FG
9
5
6
1
3
7
SDA
9
SDB
5
RDA
6
RDB
1
SG
3
FG
7
SDA
SDB
RDA
RDB
SG
FG
3
4
1
2
5
SDA−
SDB+
RDA−
RDB+
FG
3
4
1
2
5
SDA−
SDB+
RDA−
RDB+
FG
Shield
CPU Unit
Personal Computer
Signal
name
Signal
name
Signal
name
Signal
name
Signal
name
Signal
name
Signal
name
RS-232C
Interface
NT-AL001 Link Adapter
D-sub, 9-pin
connector (male)
DIP Switch Settings
Pin 1: ON
Pin 2: ON
(terminating resistance)
Pin 3: OFF
Pin 4: OFF
Pin 5: OFF
Pin 6: OFF
D-sub, 9-pin connector
(male)
Pin
No.
Pin
No.
Pin
No.
Pin
No.
Pin
No.
Pin
No.
Terminal block
5-V
power
(+)
(–)
Signal name
Pin No.
Shield
CPU Unit
Shield
B500-AL001
RS-
422A/485
interface
RS-
422A/485
Option
Board
4-wire
Terminating resistance: OFF
RS-
422A/485
Option
Board
4-wire
Terminating resistance at
end of line: ON.
FG
SD
RD
RS
CS
DR
ER
SG
1
2
3
4
5
6
7
8
9
NC
SD
RD
RS
CS
5V
DR
ER
SG
1
2
3
4
5
6
7
8
RS-422RS-232
GRD
SG
SDB
SDA
RDB
RDA
CSB
CSA
9
5
6
1
3
7
SDA
SDB
RDA
RDB
SG
FG
9
5
6
1
3
7
SDA
9
SDB
5
RDA
6
RDB
1
SG
3
FG
7
SDA
SDB
RDA
RDB
SG
FG
3
4
1
2
5
SDA−
SDB+
RDA−
RDB+
FG
3
4
1
2
5
SDA
SDB
RDA
RDB
FG
Shield
CPU Unit
Personal Computer
Signal
name
Signal
name
Signal
name
Signal
name
Signal
name
Signal
name
Signal
name
RS-232C
Interface
NT-AL001 Link Adapter
D-sub, 9-pin
connector (male)
DIP Switch Settings
Pin 1: ON
Pin 2: ON
(terminating resistance)
Pin 3: OFF
Pin 4: OFF
Pin 5: OFF
Pin 6: OFF
D-sub, 9-pin connector
(male)
Pin
No.
Pin
No.
Pin
No.
Pin
No.
Pin
No.
Pin
No.
Terminal block
5-V
power
(+)
(–)
Signal name
Pin No.
Shield
CPU Unit
Shield
B500-AL001
RS-
422A/485
interface
RS-
422A/485
Option
Board
4-wire
Terminating resistance: OFF
RS-
422A/485
Option
Board
4-wire
Terminating resistance at
end of line: ON.
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