Omron CJ1W-SCU32 Operation Manual page 52

1 Introduction
PLC:
General-
purpose
external
device
1:N
Connection of a Serial Communications Unit to devices with
RS-232C or RS-422A/485 ports.
Port: RS-
232C
*1 The maximum total cable length for RS-422/485 is 500 m when an NT-AL001 Link Adapter is used. The length
includes branch lines. Communications distance may vary by the device being connected. Refer to the manual
for the device.
*2 The maximum length is restricted to 2 m when an NT-AL001 Link Adapter is connected.
*3 The maximum branch line is 10 m.
1-12
Connection configuration
*2 *1
NT-AL001
RS-232C
RS-422A/485
Resistance ON
*2
NT-AL001
B500-AL001
RS-232C
RS-422A/485
Resistance
ON
*1
*2
NT-AL001
NT-AL001
RS-232C
RS-232C
Resistance
*1
ON
RS-232C
RS-422A/485
RS-232C
Resistance ON
5-V power
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
RS-422A/485 interface
Resistance ON
RS-422A/485 interface
Resistance ON
*3
RS-232C interface
*2
Required Connected
devices serial
communica-
tions
port/Remarks
CJ1W-SCU22 Port 1 or 2
CJ1W-SCU42 Port 2
NT-AL001 Con- Converts
verting Link between RS-
Adapter 232C and
RS-422A/485
B500-AL001 For RS-422A/485
Link Adapter branching
5-V power sup- For NT-AL001
ply Link Adapter