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3-21
3 Installation and Wiring
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
3-3 RS-23
2C and
RS-42
2A/485 Wiring
3
3-3-2 R
ecomme
nded RS-4
22A/485 Wir
ing
Examples
Connection examples are shown with the following diagrams.
z
2-wire Connections
z
4-wire Connections
Note
The FG terminal on the Serial Communications Unit is internally connected to the ground ter-
minal (GR) on the Power Supply Unit via the CPU Rack or Expansion Rack. Therefore,
ground the ground terminal (GR) on the Power Supply Unit to ground the FG.
RDA
RDB
SDA
SDB
FG
1
2
3
4
5
A(
−
)
B(+)
FG
Serial Communications Unit
Pin
Remote device
Signal
Signal
Shield
RDA
RDB
SDA
SDB
FG
1
2
3
4
5
RDA
RDB
SDA
SDB
FG
Serial Communications Unit
Pin
Remote device
Signal
Signal
Shield
Serial Communications Unit
Pin
Remote device
Remote device
Signal
Signal
Signal
RDA
RDB
SDA
SDB
FG
1
2
3
4
5
SDA
SDB
RDA
RDB
FG
RS-422
SDA
SDB
RDA
RDB
FG
RS-422
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
0
1
23
456
7
8
9AB
C
2
ON
4
TERM
OFF
WIRE
RDA-
RDA+
SDA-
SDA+
FG
RDA-
RDA+
SDA-
SDA+
FG
GR
Power Supply Unit
Serial Communications Unit
If you ground the GR
terminal, the shell or FG
terminal is also grounded.
Ground to 100
Ω
or less.
The shell or FG terminal
and GR terminal are
internally connected.
Содержание CJ1W-SCU22
Страница 192: ...4 Using Protocol Macros 4 56 CJ series Serial Communications Units Operation Manual for NJ series CPU Unit W494...
Страница 250: ...6 No protocol Mode 6 22 CJ series Serial Communications Units Operation Manual for NJ series CPU Unit W494...
Страница 460: ...A Standard System Protocol R 126 CJ series Serial Communications Units Operation Manual for NJ series CPU Unit W494...
Страница 473: ...Index 1 CJ series Serial Communications Units Operation Manual for NJ series CPU Unit W494 I Index...