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3-1
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
3
This section describes how to mount Serial Communications Units, and how to connect
the ports to external devices.
3-1 Installing Serial Communications Units . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Serial Communications Unit Installation Procedure . . . . . . . . . . . . . . . . . . . . . 3-2
Communications Modes and Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Mounting Height and Connector Cover Dimensions . . . . . . . . . . . . . . . . . . . . 3-6
Reducing Electrical Noise for External Wiring . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
Recommended RS-232C Wiring Examples . . . . . . . . . . . . . . . . . . . . . . . . . . 3-19
Recommended RS-422A/485 Wiring Examples . . . . . . . . . . . . . . . . . . . . . . 3-20
Wiring RS-232C Connectors on the CJ1W-SCU22/42 . . . . . . . . . . . . . . . . . 3-22
Installation and Wiring