Omron CJ1W-SCU32 Operation Manual page 120

3 Installation and Wiring
Port Config-
uration
RS- 1:1
422A/485
RS- 1:N
422A/485
Note 1 The maximum cable length for RS-232C is 15 m. The RS-232C standard, however, does not
cover baud rates above 19.2 Kbps. Refer to the manual for the device connected to confirm
support.
2 The total cable length for RS-422A/485 systems, including branch cables, is 1,200 m max. The
total cable length for RS-422A/485 systems, including branch cables, is 500 m max. when NT-
AL001 Link Adapters are used. The baud rate and the communications distance sometimes
depend on the remote device. Confirm the baud rates and communications distance sup-
ported by connected devices.
3 Here, the maximum cable length is limited to 2 m when an NT-Link Adapter is connected.
4 Branch lines must be a maximum of 10 m long.
3-10
Schematic diagram
RS-422A/485
NT-AL001
RS-232C
RS-422A/485
Resistance ON
5-V power
RS-422A/485
Resistance
ON
B500-AL001-E
RS-422A/485
Resistance
ON
NT-AL001
RS-232C
Resistance
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
RS-232C
interface
RS-422A/485
interface
Resistance ON
RS-422A/485
interface
Resistance ON
RS-232C
interface