Operating As An Rs-232 Interface; Figure 9: Termination With Dte-Dce Connection (1:1); Figure 10: Termination With Dte-Dte Connection (Cross-Over); Table 10: Function Of Rs-232 Signals For Dte/Dce - WAGO I/O SYSTEM 750 Manual

36 Device Description
3.3.6.1

Operating as an RS-232 Interface

Depending on the device type DTE (e.g., PC) or DCE (e.g., PFC, modem), the
RS-232 signals have different data directions.

Table 10: Function of RS-232 Signals for DTE/DCE

Contact
For a DTE-to-DCE connection, the signals are connected directly (1:1).

Figure 9: Termination with DTE-DCE Connection (1:1)

For a DTE-to-DTE connection, the signal connections are crossed.

Figure 10: Termination with DTE-DTE Connection (Cross-Over)

Signal
2 RxD
3 TxD
5 FB_GND
7 RTS
8 CTS
750-8208 PFC200 CS 2ETH RS CAN DPM
Data Direction
DTE
Input
Output
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Output
Input
Version 1.1.0, valid from FW Version 02.06.20(09)
WAGO-I/O-SYSTEM 750
DCE
Output
Input
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Input
Output
Manual