Chapter 2. System Configuration
2-8
2.4.1 Cnet I/F system
Cnet I/F System is used for communication between the main unit and external devices using RS-232C/RS-
422 (485) Interface. The XGB series has a built-in RS-232C port, RS-485 port and has also XBL-C21A for
RS-232C, XBL-C41A for RS-422/485. It is possible to construct communication systems on demand.
(1) 1:1 communication system
(a) 1:1 communication of an external device (computer) with main unit using a built-in port
(RS-232C/RS-485)
(b) 1:1 communication with main unit using a built-in RS-485 port
(In case of built-in RS-232C,it is for connecting to HMI device.)
Built-in RS-232C Connection
Built-in RS-485 Connection
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