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The RS-232 interface can be activated using a 4-pin DIL switch accessible from below
through the housing grill.
Table 5- 43
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
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.
SINAUT ST7 station control system
System Manual, 09/2016, C79000-G8976-C178-10
Pinout of the X1 RS-232 connector
Illustration
Pin no.
1
2
3
4
5
6
7
8
9
Pinout of the X2 RS-485 connector
Pin no.
1
2
3
4
5
6
7
8
9
Installation and commissioning of the modems and routers
Signal name
Signal direction
DCD
Output
RXD
Output
TXD
Input
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
*)
221
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