Omron CJ1W-SCU22, Руководство по эксплуатации, Страница: 115 / 478

3-5
3 Installation and Wiring
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
3-2 Wiring
3
3-2-4 C
onnector Pin La
y
out
z
RS-232C Ports
This layout applies to the following ports: ports 1 and 2 of the CJ1W-SCU22 and port 2 of the CJ1W-
SCU42.
Refer to 2-1 Component Names and Functions.
z
RS-422A/485 Port: Ports 1 and 2 on CJ1W-SCU32, or Port 1 on CJ1W-SCU42
Connector Pin Layout
Note When the 2-wire connections are used, use either pins 1 and 2, or pins 6 and 8.
Refer to 2-1 Component Names and Functions.
The internal circuits are shown below.
* Terminating Resistance
Turn OFF the terminating resistance switch or externally attach terminating resistance as required by the specifi-
cations of the remote device.
3-2-4 Connector Pin Layout
Pin Abbreviation Signal name I/O
1 FG Shield ---
2 SD Send data Output
3 RD Receive data Input
4 RS Request to send Output
5 CS Clear to send Input
6 5V Power supply ---
7 DR Data set ready Input
8 ER Data terminal ready Output
9 SG Signal ground ---
Shell FG Shield ---
Pin No. Symbol Signal name I/O
1 RDA Receive data
−
Input
2 RDB Receive data + Input
3 SDA Send data
−
Output
4 SDB Send data
+
Output
5 FG Shield ---
1
2
3
4
5
Pin 2 RDB(+)
Pin 1 RDA(
−
)
Pin 4 SDB(+)
Pin 3 SDA(
−
)
Receiver
Driver
2-wire/4-wire switch
Terminating resistance:
120
Ω
(*)
Terminating resistance
switch