Omron CJ1W-SCU32 Operation Manual page 51

PLC:
General-
purpose
external
device
1:1 Connection of a Serial Communications Unit to a device with an RS-
232C or RS-422A/485 port
Port: RS-
422A/485
Resistance ON
Resistance ON
*1 With the CJ1W-SCU[]2, the maximum total cable length for RS-422/485 is 1200 m. The length when an NT-AL001
Link Adapter is used is 500 m. In both cases, 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.
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
Connection configuration
*1
RS-422A/485 interface
RS-422A/485
Resistance ON
*1 *2
RS-232C interface
NT-AL001 RS-232C
RS-422A/
Resistance ON
485
5-V power
1 Introduction
Required Connected
devices serial
communica-
tions
port/Remarks
CJ1W-SCU32 Port 1 or 2
CJ1W-SCU42 Port 1
NT-AL001 Con- Convert between
verting Link RS-232C and
Adapter RS-422A/485
5-V power sup- For NT-AL001
ply Link Adapter
1
1-11