Connections For Protocol Macro, Serial Gateway, No-Protocol Mode, And Modbus-Rtu Slave Mode - Omron CJ1W-SCU32 Operation Manual

3-2-9 Connections for Protocol Macro, Serial Gateway, No-protocol
Mode, and Modbus-RTU Slave Mode
This section describes the connections for Protocol Macro, Serial Gateway, and No-protocol Mode. Up
to 32 Boards or Units can be used for 1:N connections.
Port Config-
uration
RS-232C 1:1
RS-232C 1:N
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 to be connected to con-
firm support.
2 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 some-
times depend on the remote device. Confirm the baud rates and communications distance
supported by connected devices.
3 Here, the maximum cable length is limited to 2 m when an NT-AL001 Link Adapter is con-
nected.
4 Branch lines must be a maximum of 10 m long.
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
Schematic diagram
RS-232C
RS-232C
interface
NT-AL001
RS-232C
RS-422A/485
Resistance
ON
NT-AL001
RS-422A/485
RS-232C
Resistance
ON
NT-AL001
Resistance ON
RS-232C RS-422A/485
Resistance ON
NT-AL001
B500-AL001
RS-232C
RS-422A
Resistance
/485
ON
Resistance ON
NT-AL001
NT-AL001
RS-232C
RS-232C
Resistance
ON
RS-232C
RS-422A/485
RS-232C
Resistance ON
5-V power
3 Installation and Wiring
NT-AL001
Resistance ON
5-V power
RS-232C
interface
RS-422A/
485
interface
RS-422A/485
interface
RS-422A/485
interface
RS-232C
interface
3
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