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Siemens SIMATIC PC 670 - Page 144

Siemens SIMATIC PC 670
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Hardware Information
Release 04/02
7-12
Panel PC 670 Computing Unit, Equipment Manual
Serial interface COM2 (V24/Mouse)
The serial interface (COM2) of the computing unit is assigned as follows
1
5
6
9
Figure 7-2 Serial interface COM2 (male)
Pin No.
Short Name Meaning Input/Output
1 DCD (M5) Data carrier detect Input
2 RxD (D2) Received data Input
3 TxD (D1) Transmission data Output
4 DTR (S1) Data terminal equipment
ready
Output
5 GND (E2) Station ground -
6 DSR (M1) Data set ready Input
7 RTS (S2) Request to send Output
8 CTS (M2) Clear to send Input
9 RI (M3) Incoming call Input

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