
8 DTU3005P Profibus Application Notes
Siemens Energy & Automation, Inc. 49
2 TD - Transmit Data 17 CTS +
3 RD - Receive Data 18 RTS +
4 RTS - Request to Send 19 RTS +
5 CTS - Clear to Send 21 TX -
7 SG - Signal Ground 22 RX -
23 TX +
24 RX +
Table 8.7 Pinouts for RS 232 and 422/485
RS-232 Connection RS-422/485 Connection
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