Siemens SINAUT ST7 System Manual page 229

Front view of the MD3 with removed front panels
The following figure once again shows the front view of the MD3 modem, here, however, the
front panels have been removed to show the connectors located behind them.
Figure 5-26
Pinout of the RS-232 and RS-485 ports
The X1 connector is designed as a 9-pin D-sub miniature male connector. The pinout is
shown in the following table. As an RS-232 port, the pinout corresponds to that of a
standardized PC connector.
The RS-232 interface can be activated using a 4-pin DIL switch accessible from below
through the housing grill.
Table 5- 24
Station control system
System Manual, 07/2009, C79000-G8976-C178-07
s
X3
M
L+
DC
24V
M
Front view of the MD3 modem with removed front panels
Pinout of the X1 RS-232 connector
Illustration Pin no.
1
2
3
Installing and putting a SINAUT modem into operation
X1
X2
Signal name Signal direction
DCD Output
RXD Output
TXD Input
5.7 Analog dial-up modem MD3
Remark
229