3.3.2 External device interface

You can connect various external devices to the external device interface on the front of the controller.

Figure 19 External device interface

No	Description
	LAN port
	USB port
	D-SUB connectors 9-pin (COM1, COM2): serial communication (RS485, 422, 232) 25-pin (SDIO): common digital I/O
	Terminal blocks TB1: common analog I/O TB2: dedicated safety signal input TB3: system signal I/O

• The external device interface is described based on the composition of basic connections.

• If you wish to install additional optional items and connect them to the external device interface, you may change the composition of basic connections. For more details on the installation of additional optional items and the composition of connections, consult with our Customer Support Team.