Siemens SINAUT ST7 System Manual page 261

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- 43
Illustration
*) 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.
The following standard connecting cable is available to attach to the X1 connector.
Station control system
System Manual, 07/2009, C79000-G8976-C178-07
Illustration Pin no.
4
5
6
7
8
9
Pinout of the X2 RS-485 connector
Pin no.
1
2
3
4
5
6
7
8
9
Installing and putting a SINAUT modem into operation
Signal name Signal direction
DTR Input
GND
DSR Output
RTS Input
CTS Output
RI / T Output
Signal name Signal direction
Data B Bidirectional
M5
P5
Data A Bidirectional
5.8 ISDN dial-up modem MD4
Remark
Remark
- 0 V for bus termination in
connector
*)
- 5 V for bus termination in
connector
*)
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