Technical data

Assignment of Plugs and Sockets
40 VIPA GmbH CP486 ⋅ 00/14
3.4 9-pin SubD-Plug with RS422/485 Interface (COM4)
This interface can be operated as RS422-interface, i.e. for point-to-point circuit with separate send-
receive lines, as well as RS485-interface for a bus system with send-receive function at the same
line. For this purpose, the operating mode is switched over via a bus master by appropriate attending
the SEL-signal.
TxD lines and RxD lines require for all cases each in pairs twisted and in pairs shielded lines.
3.4.1 Operation as RS422 Interface:
TxD-
6
O
O
1
-
-
7
O
O
2
TxD+
RxD-
8
O
O
3
-
-
9
O
O
4
RxD+
O
5
-
Pins signed with "-" are not used for the RS422 operation. They are not allowed to be connected!