Siemens SIMATIC NET TeleControl SINAUT ST7, Системное руководство

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Installation and commissioning of the modems and routers
5.8 ISDN dial-up modem MD4
SINAUT ST7 station control system
System Manual, 09/2016, C79000-G8976-C178-10
221
The RS-232 interface can be activated using a 4-pin DIL switch accessible from below
through the housing grill.
Table 5- 43 Pinout of the X1 RS-232 connector
Illustration Pin no. Signal name Signal direction Remark
1 DCD Output
2 RXD Output
3 TXD Input
4 DTR Input
5 GND
6 DSR Output
7 RTS Input
8 CTS Output
9 RI / T Output
The X2 RS-485 connector is designed as a 9-pin D-sub miniature female connector. The
pinout is shown in the following table.
The RS-485 interface can be activated and the terminating resistor activated using a 4-pin
DIL switch accessible from below through the housing grill.
Table 5- 44 Pinout of the X2 RS-485 connector
Illustration Pin no. Signal name Signal direction Remark
1
2
3 Data B Bidirectional
4
5 M5 - 0 V for bus termination in
connector *)
6 P5 - 5 V for bus termination in
connector
*)
7
8 Data A Bidirectional
9
*) It is advisable to activate the terminating resistor for the RS-485 bus in the connector and not in the modem itself.
Standard connecting cable for the RS-232 and RS-485 port
The TIM module or other terminal device with a suitable interface is connected to the X1 9-
pin RS-232 connector.