Siemens DTU3005-B Manuale dell'Operatore Pagina 68

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Appendix C: Installing the Hardware
64 Siemens Energy & Automation, Inc.
C.3 Connector Pinouts
All of the DTU3005B ports, 1 through 3, support both
RS-232 and RS-422/485 signals. Connection should be
made to one set of signals at a time. Table C.1 con-
tains the cable pinouts for the RS-422/485 connector.
Table C.2 contains the cable pinouts for the RS-232
connector.
Refer to Appendix D for cable connection diagrams for
specific PLC devices.
Table C.1 RS-422/485 Connector Pinouts
Pin Number Signal Name
16 CTS -
17 CTS +
18 RTS -
19 RTS +
21 TX -
22 RX -
23 TX +
24 RX +
Table C.2 RS-232 Connector Pinouts
Pin Number Signal Name
1 FG - Frame Ground
2 TD - Transmit Data
3 RD - Receive Data
4 RTS - Request to Send
5CTS - Clear to Send
7SG - Signal Ground
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